This application is directed to engagement systems for press brake tooling and other machine tool components. Applications include, but are not limited to, magnetic engagement mechanisms for press brake tooling and press brake tool holders. The technology can be adapted to punch press and press brake tooling for sheet metal fabrication, and other machine tool punch and die systems.
A typical machine press system includes a press apparatus with an upper table or ram arranged to move vertically with respect to a lower table or other (e.g., stationary) fixture. Different press brake and punch tooling components can be mounted to the upper and lower tables, and configured to bend or impress a sheet metal element or other workpiece by operation of the press. Generally, the upper table can be configured for coupling with (e.g., male) punch or press brake tooling components adapted for the desired sheet metal fabrication or other manufacturing applications, in cooperation with complementary (e.g., female) forming tools such as dies coupled with the lower table. Alternatively, the upper and lower table arrangement may be reversed, and the punch apparatus can be either horizontally or vertically oriented. A variety of different press brake and punch tooling components can also be employed, in order to perform selected forming operations on a range of different workpieces.
In operation, it can often be necessary to exchange tooling on either the upper or lower table (or both), in order to perform the desired press operations. On the upper table or ram, the forming tools may be held in place by a clamping mechanism configured to engage each machine tool component simultaneously within a tool holder. Upon unlocking or releasing the clamping mechanism, the tooling is disengaged and can be removed, for example by sliding the tooling components horizontally to an open end of the table, or by manipulating in a vertical or transverse direction to disengage the tooling from the holder.
The exchange of press brake and punch tooling can be time consuming and cumbersome due to proximity to the press apparatus and other tooling component in the upper or lower tables. This may necessitate the removal of some or all of the adjacent tooling components when only selected tools are being exchanged, and the clamping mechanism itself can also interfere with tooling selection. Similar shortcomings may exist with respect to both male and female tooling, e.g., whether supported from a tool holder in the upper table or ram, or from a lower table, die holder or similar fixture.
Tooling removal and insertion operations may introduce safety risks associated with handling the (often heavy) machine tool components. In particular, loosening the clamping mechanism without taking proper precautions may result in one or more tool components coming loose or falling, which can in turn result in process delays or tooling damage, or introduce a risk of operator injury. To prevent this, mechanisms such as safety tangs have been developed, e.g., with a tang member that protrudes laterally from an engagement surface of the tooling component, and is adapted to engage a complementary groove defined by the tool holder to secure the tool until is it clamped. Such mechanisms may require additional manipulations by the operator to actuate the safety mechanism, which may be concealed by the holder or otherwise not directly accessible. For these and other reasons, there is a need for improved techniques to engage and secure punch and press brake tooling to a table or ram while the clamping mechanism is disengaged. These techniques are also applicable to engage and secure machine tool, punch and die and components for which no clamping mechanism is provided.
In accordance with the various examples and embodiments of the disclosure, a machine tool apparatus may include a tool holder or holder body defining a receiving portion configured for selective engagement with a coupling end of a machine tool, for example a press brake or punch tooling component. A magnetic coupling assembly or mechanism can be provided for engaging the machine tool with the holder, including one or more magnetic elements configured to generate a magnetic coupling adapted for selective engagement and disengagement of the holder with the coupling end of the machine tool.
The magnetic elements may include both field sources (e.g., permanent magnets or other sources of magnetic flux) and flux guides (e.g., ferromagnetic elements or similar materials with suitable magnetic properties). An actuator can be configured to manipulate at least one of the magnetic elements to modulate a strength of the magnetic coupling, in order to achieve selective engagement and disengagement of the holder with the coupling end of the machine tool. In some examples, the components of the magnetic assembly may be fixed or movable in position or rotation and switchable, selective, non-switchable or non-selective with respect to magnetic orientation, such that the magnetic coupling assembly is configured to generate a selective magnetic coupling adapted for engagement and disengagement of the tool holder with the coupling end of the machine tool insert.
In some embodiments, the actuator may be configured to manipulate at least one of the magnetic elements of the magnetic coupling assembly between a locked or engaged position, in which the coupling end of the machine tool is selectively engaged within the receiving portion of the holder body, and an alternate unlocked or disengaged position, in which the coupling end of the machine tool is selectively disengaged from the receiving portion of the holder body. For example, one or more of the magnetic elements may be responsive to actuation of the actuator, such that the locked and unlocked positions are bi-stable. In the locked position, the magnetic coupling may support a weight of the machine tool disposed within the receiving portion of the holder body, e.g., within a vertically oriented upper table or ram.
Some embodiments may include an adjustment mechanism configured to adjust a strength of the magnetic coupling, e.g., in order to support the weight of a selected machine tool component. Press brake and punch press apparatus embodiments are also encompassed, along with their associated punch press and press brake tooling components and corresponding methods of manufacture and fabrication of sheet metal elements and other workpieces.
Some embodiments may include a machine die apparatus. The machine die apparatus may include a tool holder body having a receiving portion configured for selective engagement with a coupling end of a machine die. The machine die apparatus may further include a magnetic coupling assembly comprising one or more magnetic elements configured to generate a magnetic coupling adapted for the selective engagement of the tool holder body with the coupling end of the machine die. In some examples, the magnetic components of the machine die apparatus may be fixed or movable in position or rotation and switchable, selective, non-switchable or non-selective with respect to magnetic orientation, such that the magnetic coupling assembly is configured to generate a selective magnetic coupling adapted for engagement and disengagement of the tool holder body with the coupling end of the machine die.
As illustrated in
To lock or otherwise secure tool 104 to holder 102, a movable clamp 116 secured to holder 102 may be tightened against a surface of tang 110, thereby laterally sandwiching tang 110 between clamp 116 and an opposing stationary surface of receiving cavity 106. To tighten and loosen clamp 116, a front surface 118 of holder 102 may be configured to receive one or more fasteners through at least one fastener aperture 120. In operation, such a press brake assembly may punch, impress, crimp, fold, crease or otherwise shape various workpieces inserted beneath working end 114 and optionally one or more forming dies. In embodiments, a workpiece may include a sheet material component or other material to be tooled.
Magnetic Tooling Engagement
In some embodiments, the tool 204 may define only one shoulder, e.g., shoulder 211a or 211b, such that only one of the opposing tool shoulders 205a or 205b abuts the shoulder of the tool when inserted within receiving cavity 206. In some examples, receiving cavity 206 may define at least one relief, groove, recess, shelf or ledge 212. Like tool 104, tool 204 may define a working end 214 opposite the holder. Side surface 208 may define one or more apertures 216a, 216b, each exposing a portion of a slidable rack 218a and 218b, respectively.
An upper stator magnet 219a, 219b may be positioned above each rack 218a, 218b, and a lower stator magnet 220a, 220b may be positioned below each rack. In the embodiment shown, a portion of each stator magnet 219a, 219b, 220a, 220b is exposed through each aperture 216a, 216b.
A handle, lever or other actuator 224 is attached to front surface 225 of holder 202. In this particular example, actuator 224 includes an elongated knob 226, but in various embodiments actuator 224 may comprise any protrusion or feature manipulable or graspable by an operator for manually securing holder 202 to tool 204. As described in greater detail below, actuator 224 may be operatively coupled with slidable racks 218a, 218b such that moving, rotating, or otherwise adjusting or manipulating actuator 224 may cause the racks to slide longitudinally within holder 202. A plurality of fastener apertures 228 are defined by front surface 225, the apertures configured to receive fasteners that may be tightened to urge a clamping bar or similar clamping mechanism 235 against a surface of tang 210.
Together, actuator 224, racks 218a, 218b, and various magnetic elements included within holder 202 may comprise at least a portion of a coupling mechanism configured to reversibly couple tool 204 with holder 202. More particularly, the magnetic elements may form a magnetic assembly configured to generate a magnetic flux coupling between holder 202 and tool 204. By selectively manipulating at least one of the magnetic elements, for example by physically moving the element(s), the coupling mechanism modulates the strength of the magnetic flux coupling by guiding the flux between the tool holder 202 and machine tool 204, thereby regulating the strength of the magnetic coupling to switch holder 202 between engaged (locked), disengaged (unlocked) and/or intermediate configurations with respect to tool 204. Tool 204 may include or be made of ferromagnetic materials selected to increase the strength of the magnetic coupling, and to guide the flux from the tool holder 202 to the tool 204, and back from the tool 204 to the tool holder 202.
The coupling mechanism may be used to couple tool 204 with holder 202 while arranging or staging additional tools within holder 202 and/or other holders. In some embodiments, the coupling mechanism may provide a safety mechanism for temporarily coupling tool 204 with holder 202, for example before an additional clamping mechanism is activated and the press brake apparatus begins operating to form a workpiece. In some examples, the magnetic coupling mechanism may suffice to secure tool 204 with holder 202 without additional support, for example as provided by clamping bar 235. Alternative examples may include fixed or stationary magnets, e.g., fixed, non-switchable magnets. Such embodiments may be sufficient for coupling smaller tools, in particular, and may exert a magnetic flux coupling readily overcome by manual engagement.
In some embodiments, where a basal or nominal level of magnetic coupling strength is sufficient to retain tool 204 within a disengaged holder 202, for example, fasteners 229 and tightening clamp 235 may be unnecessary. Such embodiments may thus lack fastener apertures 228 within front surface 225 or elsewhere on holder 202, and may also lack clamping bar 235. In some embodiments, however, the magnetic strength of the coupling mechanism provided by the magnetic elements may be relied upon to retain tool 204 on a temporary basis, e.g., while staging for tool installation. In such embodiments, the physical coupling mechanism provided by clamping bar 235 may provide the supplemental clamping strength necessary to secure tool 204 in place for use in metal forming operations.
In implementations that include clamping bar 235, receiving cavity 206 may be partially defined by a stationary side, e.g., the interior surface of shoulder 205a, and an opposing movable side comprised of clamping bar 235. In some examples, clamping bar 235 may be configured for selective engagement with a surface of the coupling end of the machine tool in response to activation of the magnetic flux coupling. Additional embodiments may include alternative mechanisms for adjusting clamping bar 235, e.g., other than fasteners 229. For example, clamping bar 235 may be movable by a cam and lever and/or an electric or hydraulic actuator.
In the example shown, rack 218a includes four pairs of rack magnets, each pair comprising a first rack magnet 236a and a second rack magnet 237a. Likewise, rack 218b includes four pairs of rack magnets, each pair comprising a first rack magnet 236b and a second rack magnet 237b. Four vertical center magnets 222 are included in this embodiment, each positioned proximate, e.g., beneath, a vertically oriented center spring 238. Pairs of ferromagnetic brushes 240a, 240b extend laterally outward from each center magnet 222, mating with a portion of each upper stator magnet 219a, 219b. In various embodiments, each brush may comprise a high-permeability, ferromagnetic material.
The magnetic assembly shown in
In operation, the magnetic assembly of holder 202 is configured to generate a magnetic flux coupling adapted for the selective engagement of the tool 204, specifically at tang 210, which may be ferromagnetic and comprised of carbon steel or medium alloy steel in some embodiments. The magnetic flux coupling may be engaged, and disengaged, by manually manipulating actuator 224 via knob 226. In turn, actuator 224 manipulates at least one of the internal magnetic elements shown in
The strength of the magnetic flux coupling may be adjusted by altering the alignment of rack magnets 236a/b, 237a/b with the upper stator magnets 219a, 219b and lower stator magnets 220a, 220b. Adjusting the alignment of the rack magnets relative to the stator magnets is driven by rotation of the pinions 232a/b, which causes the racks, and thus the rack magnets embedded therein, to slide within the holder. In some examples, the slidable racks, along with the magnets embedded therein, are responsive only to the actuator, such that the locked and unlocked positions of the holder are bi-stable or non-momentary.
The number of parallel pairs of magnetic components, e.g., upper stator magnets 219a/b, lower stator magnets 220a/b and ferromagnetic brushes 240a/b may vary. The example shown includes four parallel magnetic subassemblies, each subassembly including single center magnet 222. The number of magnetic subassemblies may range from 1 to about 10, 1 to about 15, 1 to about 20, or any suitable range therebetween and may depend at least in part on the length of the holder and/or the weight of the tool to be coupled with the holder. In some examples, each subassembly may induce two magnetic circuits.
The center magnet 222 is magnetically oriented with its south pole facing up, e.g., in the reverse orientation relative to the stator magnets and rack magnets. Ferromagnetic brushes 240a, 240b are positioned laterally between each upper stator magnet 219a, 219b and center magnet 222, and when inserted into receiving cavity 206, tang 210 of tool 204 is positioned below center magnet 222 and laterally between each lower stator magnet 220a, 220b. As a result, a magnetic circuit that generates a magnetic flux may be established through the magnetic elements included in holder 202.
The flux may pass vertically through upper stator magnet 219a, laterally through ferromagnetic brush 240a, vertically through center magnet 222, diagonally through tang 210, and vertically through lower stator magnet 220a. A similar magnetic circuit may be simultaneously established through lower stator magnet 220b, rack magnet 237b, upper stator magnet 219b, ferromagnetic brush 240b, center magnet 222 and tang 210. Thus, parallel magnetic circuits may be established in the configuration shown, collectively generating a total magnetic force sufficient to couple tool 204 with holder 202.
In some embodiments, clamping bar 235 may contribute and/or be affected by the magnetic circuits, particularly the circuits generated by the magnetic components embedded in shoulder 205b. As a result, clamping bar 235 may not drop, droop or otherwise hang down within receiving cavity 206. Securing clamping bar 235 via the magnetic circuits to prevent dropping may be necessary to properly position the clamping bar for tightening against tang 210 without, for example, lowering tool 204 onto a deformable material to force the tool and the clamping bar into an acceptable position for clamping.
Suitable configurations may also include one or more magnetic components coupled with clamping bar 235, for example embedded within clamping bar 235 or installed in a top portion of the clamping bar. Such magnetic components may urge clamping bar 235 against the inner surface of shoulder 205b, and may also contribute to the magnetic pulling or attractive force exerted on tool 204. In addition or alternatively, one or more magnetic components may be included within shoulder 205b to pull clamping bar 235 tightly against an inner surface thereof, preventing the clamping bar from drooping or dropping in a vertical direction. In addition or alternatively, one or more magnetic components may be installed in a bottom portion of clamping bar 235 to urge the clamping bar against shoulder 205b. Magnetic components included in both a top and bottom portion of clamping bar 235 may also be included.
To strengthen the magnetic circuits established by the magnetic components embedded within shoulders 205a/b, the clamping bar magnets can each be similarly oriented, e.g., either north-to-south or south-to-north. Clamping bar 235 may comprise a ferromagnetic material or a non-ferromagnetic material. In some embodiments, clamping bar 235 may include one or more high-permeability inserts aligned with the magnetic components included in shoulder 205b of the holder body such as to avoid interference with, and/or contribute to, the magnetic circuit passing therethrough.
As disclosed, each pair of rack magnets (e.g., 236a and 237a) may comprise oppositely oriented magnets, alternating between north pole-up and south pole-up along the length of each slidable rack 218a, 218b. Because each rack magnet within a rack magnet pair is oppositely oriented, and because the slidable racks are positioned between each pair of upper and lower stator magnets, sliding the racks alternately strengthens or disrupts the magnetic circuit established in the configuration depicted in
Because each rack magnet may comprise a relatively strong magnetic material, e.g., an NdFeB or similar permanent magnet material, such misalignment may disrupt the magnetic circuit and allow tang 210, and thus tool 204, to be released from holder 202. In this manner, actuator 224 may modulate the strength of the magnetic flux coupling between holder 202 and tool 204, switching the holder between locked and unlocked configurations by adjusting the alignment of the rack magnets with the other magnetic components of the holder via movement of the slidable racks.
In various embodiments, center magnets 222 may be vertically slidable to adapt to variation in the amount of clearance between the top surface of tang 210 and cavity ceiling 207. The amount of clearance may vary due to variation in punch tang heights, with greater clearance generally resulting from shorter tangs relative to taller tangs. Thus, to accommodate tangs of different heights, center magnets 222 may slide up and down within cylindrical holes in the body of holder 202, between the arcuate side surfaces of each ferromagnetic brush 240a, 240b.
Because tang 210 may contact center magnet 222, the vertical distance by which the center magnet protrudes into the holder body may depend on the height of the tang, such that taller tangs may force the center magnet further into the holder body. Center springs 238 positioned above each center magnet may accommodate such movement by compressing upon insertion of the tang. Upon release of the from the receiving cavity, the springs may urge center the magnet back downward, returning the magnet back to its resting state position ready to receive another tang.
To establish defined magnetic circuits between the magnetic components of holder 202, e.g., permanent magnets, ferromagnetic elements and/or electromagnets, the holder body may comprise a non-ferromagnetic material, including various stainless steels, e.g., austenitic stainless steel. In some embodiments, the holder body may include one or more high-permeability inserts aligned with the stator magnets and center magnets to optimize the magnetic circuits generated therethrough. In some embodiments, at least a portion of the body of the holder may be ferromagnetic.
In some embodiments, an amount of residual magnetic strength or coupling force may remain even in the disengaged configuration. The magnetic strength of the holder remaining in the disengaged configuration may be sufficient to retain various tools, especially smaller or less heavy tools. This basal or residual magnetic strength may be particularly advantageous for coupling multiple tools within the same holder, as the first-inserted tools may remain coupled with the holder while additional tools are added. After all tools are coupled with such a holder, the actuator 224 may be manipulated to switch the holder into the engaged configuration, ready for operation. Relative to its orientation in
In various examples, one or more control mechanisms may also be implemented to adjust the strength of the magnetic flux coupling between holder 202 and tool 204. For example, a control mechanism may be configured to reduce the strength of the magnetic circuit generated by the holder while various tools are being coupled with the holder. When all tools are correctly positioned, an operator can fully activate the control mechanism to secure all tools to the holder.
As further discussed below with reference to
The magnetic strength of holder 202 in the disengaged configuration, and the movement of each rack 218a, 218b required to switch the holder between engaged and disengaged configurations, may depend on the strength and/or positioning of rack magnets 236a, 237a, 236b, 236b. As mentioned above, alternately oriented rack magnets 236a, 237a and 236b, 237b may comprise strong permanent magnets (for ease of explanation only the “a” magnet sets are referred to in this paragraph). Within each pair, rack magnet 236a is shown positioned relatively close to rack magnet 237a. In other implementations, the distance between the rack magnets in each pair may be adjusted.
Different distances between each rack magnet within a pair may modify the rate at which the magnetic strength of the magnetic circuit is adjusted. For example, oppositely-oriented rack magnets 236a, 237a positioned in close proximity may cause an abrupt switch between engaged and disengaged configurations of the holder 202 in response to even slight movement of rack 218a. By contrast, oppositely-oriented rack magnets 236a, 237a positioned further apart may cause a more gradual adjustment in the strength of the magnetic circuit upon movement of rack 218a, thereby causing a less abrupt switch between engaged and disengaged configurations of holder 202. According to such embodiments, greater movement of rack 218a may be required to toggle holder 202 between engaged and disengaged configurations.
Relatedly, rack 218a may be positioned in an intermediate configuration, between locked and unlocked configurations, in which the magnetic strength may be variable, e.g., at a level of magnetic strength capable of retaining some tools but not others. The strength of each rack magnet 236a, 237a (especially relative to the other magnets in the holder) may also impact the switch rate and/or the movement of rack 218a required to effect the switch. For example, if the rack magnet oriented to disrupt the magnetic circuit, e.g., the “reverse magnet,” is stronger than its pairwise partner magnet, then the magnetic strength of the holder in the disengaged configuration may be nearly eliminated. Similarly, if upper stator magnets 219a and lower stator magnets 220a have a lower strength, the reduction in magnetic strength imparted by the reverse magnets in the disengaged configuration may be greater.
Multiple Holder Assemblies
As a result, the length of assembly 300 may also vary. For instance, a 1-meter long assembly 300 may include as many as ten or more individual holders 202, each being approximately 100 mm in length, or more or less. In some embodiments, individual holders 202 may be differently sized, such that some holders include different numbers of magnetic subassemblies. According to such embodiments, shorter and/or lighter tools may be sufficiently coupled with holders having smaller numbers of magnetic subassemblies, e.g., one or two subassemblies, compared to longer and/or heavier tools, which may be paired with holders having a greater number of magnetic subassemblies, e.g., three, four, five, six, seven or more subassemblies. Generally, the greater the number of magnetic subassemblies exerting an upward pulling or attractive force on the tang of a tool, the greater the total force imposed on the tool, thus enabling holders having greater numbers of magnetic subassemblies to secure heavier tools.
As shown in
Press Brake, Punch and Die Tooling
The magnetic components of die holder 252 may comprise a magnetic assembly configured to generate a magnetic flux coupling adapted for the selective engagement of the die holder body with die tang 251. In particular, the magnetic elements within die holder 252 may be magnetically oriented to generate a magnetic circuit in the engaged configuration shown. Each of the lower stator magnets 266a, 266b may be similarly oriented, for example such that its north pole is positioned above its south pole (and vice versa), and each of the upper stator magnets 264a, 264b, positioned directly above the lower stator magnets, may also be similarly oriented such that, for example, its north pole is oriented above its south pole. In various examples, the stator magnets may remain stationary or fixed within die holder 252, having a fixed magnetic orientation.
Likewise, rack magnets embedded within the slidable racks may also be oriented with the north pole facing up in the engaged configuration. Center magnet 270 may be magnetically oriented with its south pole facing up, e.g., in the reverse orientation relative to the stator magnets. When inserted into a receiving portion or cavity 258 defined by die holder 252, die tang 251 is positioned between each upper stator magnet 264a, 264b and above center magnet 270. As a result, a magnetic circuit may be established through the magnetic elements included in die holder 252. Parallel circuits may generate parallel magnetic fluxes that exert a downward magnetic force on die 250, thereby securely coupling die 250 with die holder 252 such that lateral movement, e.g., sliding, wobbling and/or shifting, of die 250 is prevented.
For instance, in the engaged configuration, a magnetic flux may pass vertically through upper stator magnet 264a, rack magnet 262a and lower stator magnet 266a, pass laterally through ferromagnetic brush 268a, and then proceed vertically through center magnet 270, eventually looping through at least a portion of die tang 251, which may be ferromagnetic, and back through upper stator magnet 264a. A similar magnetic circuit may be simultaneously established through lower stator magnet 266b, rack magnet 262b, upper stator magnet 264b, tang 251, center magnet 270 and ferromagnetic brush 268b. Thus, parallel magnetic circuits may be established in the configuration shown, collectively creating a magnetic force sufficient to couple die 250 with die holder 252.
Additional or alternative magnetic components may be included in die holder 252, for example including one or more electromagnets (for example as shown with respect to a tool holder in
Such embodiments may be sufficient for coupling smaller dies, in particular, and may exert a magnetic flux coupling readily overcome by manual engagement. Non-switchable magnetic elements in such embodiments may include one or more permanent magnets and/or one or more ferromagnetic components. Example arrangements of such magnets are shown with respect to a tool holder in
In some embodiments, one or more mechanical clamping mechanisms may be included in die holder 252. Such mechanical mechanisms may be implemented to provide additional clamping strength as necessary to retain a die 250. In some examples, a mechanical clamping mechanism may include one or more fasteners 257 acting in concert with a clamping bar configured to apply a lateral pressure against tang 251, similar to clamping bar 235.
The slidable racks 260a, 260b may be moved via manual engagement with actuator 254, which thereby modulates the strength of the magnetic flux between the die holder and the die. As further shown, alleviation of the downward force applied by die 250 upon its removal may cause spring 272 to extend upward and center magnet 270 to move upward, protruding into receiving cavity 258. In some examples, the slidable racks may be responsive to the actuator, such that the locked and unlocked configurations of the die holder are bi-stable or non-momentary.
In some embodiments, one or more mechanical removal mechanisms may be included in die holder 252. Such mechanical removal mechanisms may be implemented for directly leveraging or pry die 250 away from die holder 252. Mechanical removal mechanisms may be necessary for overcoming particularly strong magnetic circuits, which may continue to retain die tang 251 within receiving cavity 258 even after switching to the disengaged state. In some examples, mechanical removal mechanisms may include one or more decoupling members, such as pry bars, similar to the pry bars shown in
Magnetic Clamping Mechanisms
To couple holder 602 with tool 604, mechanical clamping mechanism 608 may move clamping bar 606 in the lateral direction via extension or retraction of each axle 616 and thus each cap 610. When pulled tightly against the surface of tang 614, clamping bar 606 may secure tool 604 within receiving cavity 612. The magnetic circuit established between holder 602 and the vertical arrays of magnetic elements within clamping bar 606 can minimize or eliminate air gaps between tool 604, clamping bar 606 and holder 602, which may enhance the coupling strength between holder 602 and tool 604. In some embodiments, the magnetic circuit created between the magnetic elements of clamping bar 606 and holder 602 may be sufficient in magnetic strength to at least temporarily coupled tool 604 with holder 602.
In the particular arrangement shown, the body of holder 602 includes three holder magnets 618 positioned proximate to three vertical arrays of magnetic elements positioned within clamping bar 606. Each array includes an upper clamp magnet 620, a lower clamp magnet 622, and a high-permeability insert 624. To propagate a magnetic flux between the holder magnets and the magnetic components of the clamping bar, adjacent components may be arranged in alternating fashion, e.g., north-up, then south-up, north-up, then south-up, etc. In some examples, this configuration of magnetic components may be non-switchable, such that clamping bar 606 is consistently prevented from hanging loosely or dropping by maintaining a magnetic circuit with holder 602, thereby positioning clamping bar 606 to effectively couple tool 604 with holder 602.
The arrangement of magnetic components in clamping bar 606 and holder 602 may vary in different embodiments. Example configurations may include magnetic components, e.g., permanent magnets or ferromagnetic inserts, installed only in a top portion of the clamping bar, e.g., upper clamp magnets 620. Some embodiments may comprise one or more magnetic components, e.g., permanent magnets or ferromagnetic inserts, installed only in a bottom portion of clamping bar 235, e.g., lower clamp magnets 622. In some examples, holder magnet 618 may be supplemented or replaced by one or more ferromagnetic inserts. One or more electromagnets may also be included within clamping bar 606 and/or holder 602.
The vertical arrays of magnetic components within clamping bar 606 may be configured as cylindrical island assemblies within non-ferromagnetic isolating tubes, as rectangular block assemblies having flat isolating shims, or as solid magnets installed directly into the clamping bar and/or the body of the holder. Direct installation of one or more magnets may be more cost-efficient to manufacture. The clamping bar may comprise a ferromagnetic material or a non-ferromagnetic material.
Electromagnetic Flux Generation
In operation, the magnetic components of holder 802 may induce a magnetic circuit 826 (represented by the arrows). Selective activation of electromagnet 818 modulates the strength of the magnetic flux coupling between holder 802 and a tool 828 inserted into receiving cavity 806. Electromagnet activation may switch the holder into an engaged state in which tool 828 is reversibly coupled with the holder. Electromagnetic deactivation may switch the holder into disengaged or unlocked state, which allows for the installation or removal of tool 828. The ferromagnetic components of the circuit, e.g., shoulder rods 816 and inserts 822, may concentrate the magnetic circuit such that the magnetic flux is in the direction of the arrows representing magnetic circuit 826.
To selectively adjust the magnetic flux coupling between holder 802 and tool 828, the solenoid lead 824 may be electrically coupled with an electronic controller 830, which may thus provide an actuator 854 for the magnetic flux coupling. For example, electrical voltage supplied by controller 830 may enter solenoid 820 via solenoid lead 824, thereby activating electromagnet 818 and inducing magnetic circuit 826. In some embodiments, controller 830 may include or be at least communicatively coupled with one or more sensors 831 configured to detect the presence or absence of tool 828 within receiving cavity 806. Based on this detection, sensor 831 can provide feedback signaling to controller 830. The magnetic coupling assembly 815 of the die holder 802 may thus include one or more magnetic elements configured to generate a magnetic coupling adapted for engagement of the die holder body with the coupling end of a machine die.
For instance, in response to detecting at least a portion of tool 828, e.g., a tang, within receiving cavity 806, sensor 831 can transmit a signal to controller 830 prompting the controller to activate magnetic flux coupling via electromagnet 818. Likewise, in response to detecting no or zero tool components within receiving cavity 806 (or the absence thereof), sensor 831 may transmit a signal to controller 830 prompting the controller to deactivate magnetic flux coupling via electromagnet 818 by reducing or cutting off a voltage supply.
In some embodiments, controller 830 may adjust the magnetic strength of holder 802 by increasing, decreasing, or maintaining the voltage transmitted to the electromagnet, thus providing an adjustment mechanism for altering the maximum strength of the holder as necessary to accommodate machine tools of varying weights. The position of sensor 831 may vary and is not limited to the example position shown. In some embodiments, the electromagnet may be responsive to the electronic controller, such that the locked and unlocked configurations of the holder are bi-stable or non-momentary.
In some examples, a high frequency signal is superimposed on a DC supply 835 to the electromagnet(s), reacting with the inductance of the solenoid coils of the electromagnet(s), the amplitude of which can be assessed or demodulated. Since the magnetic circuit through the electromagnet(s) is effectively part of the flux coupling core of said electromagnet(s), and the magnetic circuit passes through the tool, when present, the presence or absence, or even proximity of a tool within the holder, will change the inductance of said electromagnet(s) and thus attenuate the high frequency signal and so could be measurable by the electronic controller with A to D conversion and programming. The data measured by the controller may then be used to present an indication of the presence or proper seating of the tool within the holder, or even to increase the DC voltage, thereby increasing the magnetic strength of the holder to maintain secure seating of the tool within the holder, or for an intermediate holding force such as to facilitate hand movement of the tool(s) coupled with the holder, which may be useful for staging or alignment of tools together for a particular function.
Rotary and Lateral Magnetic Engagement
At a side surface 914, holder 902 defines a gear window 916. Within gear window 916, the holder includes a rotatable pinion 918 configured to engage with pin 908 such that together, the two components comprise a rack and pinion assembly, the slidable pin functioning as the rack. An idler 920 centrally disposed within pinion 918 couples the pinion to the holder. A gear member 922 is positioned proximate to pinion 918, where it may rotatably engage the pinion upon lateral movement of pin 908. Defined in a top surface 923 of holder 902 are vertical apertures 924. Holder 902 is configured for selective engagement and disengagement of a tool, e.g., a punch, upon manipulation of one or more magnetic components included in the holder.
In operation, lateral sliding of pin 908 (e.g., into and out of the page) can cause pinion 918, and thus gear member 922, to rotate. Consequently, axle 933, which may be coupled, fixed, or formed integrally with gear member 922, also rotates. Rotation of axle 933 causes rotation of rotatable magnets 926 and rotatable insert 932 attached thereto. Rotation of rotatable magnets 926 modulates the magnetic alignment of the rotatable magnets with lower magnets 928 and upper magnets 930.
As shown in the configuration of
This particular arrangement may induce a magnetic circuit that loops through holder 902 and receiving cavity 906. The circuit may induce a magnetic flux coupling adapted for the selective engagement of holder 902 with the coupling end of a machine tool. Ferromagnetic inserts 931, positioned between the rotatable magnets and each set of upper and lower magnets, may concentrate the magnetic circuit through the tool coupled with holder 902.
Rotatable magnet 926 can modulate the strength of the magnetic circuit induced through holder 902 by rotating, via movement of pin 908, such that its magnetic poles move in and out of alignment with each upper magnet 930, lower magnet 928, and lateral magnets 935. Shoulder inserts 936 may comprise ferromagnetic material configured to concentrate the magnetic circuit induced by the magnets through a tool 904 inserted within receiving cavity 906. As indicated by the arrows, the magnetic components of holder 902 may induce two magnetic circuits 938a, 938b generating oppositely-directed magnetic flux paths. The net magnetic flux generated by both circuits act cooperatively to retain tool 904. The rotatable magnets may be configured for various degrees of rotation. In some embodiments, each rotatable magnet may rotate a maximum of about 90° to effect switching between engaged and disengaged configurations.
Instead of rotatable magnets, holder 1002 may include a rotatable ferromagnetic paddle 1006, which may be positioned adjacent to rotatable insert 1008. Together with gear member 1009, these components may comprise a rotatable magnetic assembly that is manipulable via lateral movement of the pin. In the engaged configuration shown, holder 1002 may be selectively coupled with a tool via a magnetic flux coupling.
Rotation of ferromagnetic paddle 1006 drives modulation of the strength of the magnetic circuits induced by holder 1002. The shape of paddle 1006 may alternate the magnetic strength. In particular, paddle 1006 may not be cylindrical, like the rotatable magnets 926 shown in
In the disengaged configuration shown in
Decoupling Elements
The particular embodiment shown includes three pry bars or levers 1105, but the number of pry bars may vary. In various examples, the number of pry bars may range from one to about five, from one to about ten, from one to about fifteen, or from one to about twenty or more. Greater numbers of pry bars may be necessary to remove tools from a holder having a relatively high magnetic strength even in a disengaged configuration. The pry or lever members 1105 can provide enhanced safety to operators by serving as an additional component requiring manipulation before a tool may be released from the holder, in addition to the magnetic coupling components operably coupled with actuator 1108. The pry bars shown in
The strength of the circuits may be sufficient to at least temporarily couple tool 1204 with holder 1202. Because the magnetic strength of magnets 1208 may not be modulated, pry bars 1206 may selectively switch holder 1202 between engaged and disengaged configurations. In particular, the pry bars mechanically leverage or pry the tool away from the holder, overcoming the retaining strength of the magnetic circuit induced by magnets 1208 and ferromagnetic components included in the holder and tool. In some embodiments, the pry bars may suffice to release tool 1204 from holder 1202. In other embodiments, the pry bars, alone, may be insufficient to fully separate tool 1204 from holder 1202. Such embodiments may require an operator to manually remove tool 1204 from holder 1202. In various examples, this manual removal step may be performed with ease.
Sliding Actuator Elements
In various embodiments, actuator 1305 may be physically or operatively coupled with rack 1316. Movement of the actuator can cause equal, parallel movement of rack 1316. By moving actuator 1305 laterally within window 1306, holder 1302 may be switched between engaged and disengaged configurations, the holder configured to induce a magnetic circuit capable of retaining a tool in the engaged configuration. In some examples, the engaged and disengaged configurations of holder 1302 may be bi-stable or non-momentary.
In accordance with examples and embodiments of the above disclosure, a machine tool apparatus includes a holder body having a receiving portion configured for selective engagement with a coupling end of a machine tool; a magnetic coupling assembly including one or more magnetic elements configured to generate a magnetic coupling adapted for the selective engagement of the holder body with the coupling end of the machine tool; and an actuator configured to manipulate at least one of the magnetic elements to modulate a strength of the magnetic coupling for selective engagement and disengagement of the holder body with the coupling end of the machine tool.
In some embodiments, the actuator may be configured to manipulate at least one of the magnetic elements of the magnetic coupling assembly between a locked position, in which the coupling end of the machine tool is selectively engaged within the receiving portion of the holder body, and an alternate unlocked position, in which the coupling end of the machine tool is selectively disengaged from the receiving portion of the holder body. In some embodiments, the one or more magnetic elements may be responsive to actuation of the actuator such that the locked and unlocked positions are bi-stable. In some examples, in the locked position, the magnetic coupling may support a weight of the machine tool disposed within the receiving portion of the holder body. Some embodiments may further include an adjustment mechanism configured to adjust a maximum strength of the magnetic coupling to support the weight of the machine tool.
In any of the above examples and embodiments, the magnetic elements may include one or more permanent magnets and one or more ferromagnetic components, and the actuator may be configured to selectively move at least one of the permanent magnets or ferromagnetic components to modulate the strength of the magnetic coupling by forming a flux path therebetween.
In some embodiments, at least one of the magnetic elements may be configured to slide to selectively form the flux path and/or to modulate a magnetic impedance thereof. In some implementations, at least one of the magnetic elements may be configured to rotate to selectively form the flux path and/or to modulate a magnetic impedance thereof. In some examples, the one or more magnetic elements may include at least one electromagnet configured to selectively generate a magnetic flux to modulate the strength of the magnetic coupling. According to such embodiments, the actuator may include an electronic controller electronically coupled with the magnetic coupling assembly. The electronic controller may be coupled with a feedback sensor configured to detect the machine tool within the receiving portion of the holder body.
In any of the above examples and embodiments, the receiving portion of the holder body may comprise a cavity defined by an inner surface of the holder body and a clamping member configured for selective engagement with the coupling end of the machine tool disposed within the cavity. In some embodiments, the magnetic coupling assembly further includes one or more magnetic elements embedded within the clamping member. In some examples, the magnetic coupling assembly further includes one or more magnetic elements embedded within the inner surface of the holder body.
In any of the above examples and embodiments, the magnetic coupling may define a magnetic flux circuit that passes through the coupling end of the machine tool and at least a portion of the holder body. Some examples may further include one or more mechanical coupling members comprising at least one clamp, screw, cam, or lever configured to secure the coupling end of the machine tool within the receiving portion of holder body. Embodiments may further include one or more decoupling members configured to mechanically urge the machine tool away from the holder body such that the machine tool may be removed from the receiving portion of the holder body. In some examples, the magnetic coupling assembly may include one or more magnetic coupling sub-assemblies arranged along a length of the holder body, each of the sub-assemblies including one or more magnetic elements configured to generate a magnetic coupling adapted for the selective engagement of the holder body with the coupling end of the machine tool.
A machine tool assembly in accordance with the present disclosure may include a holder body having a receiving portion configured for engagement with a coupling end of a machine tool; and a magnetic coupling assembly comprising one or more magnetic elements configured to generate a magnetic coupling adapted for the engagement of the holder body with the coupling end of the machine tool. In some embodiments, the receiving portion of the holder body comprises a cavity defined by an inner surface of the holder body and a clamping member, the clamping member configured for engagement with the coupling end of the machine tool in response to activation of the magnetic coupling.
In some examples, the magnetic coupling assembly may further include one or more magnetic elements embedded within the inner surface of the holder body. In some embodiments, the magnetic coupling assembly may further include one or more magnetic elements embedded within the clamping member. Some implementations may further include one or more decoupling members configured to mechanically urge the machine tool away from the holder body such that the machine tool may be removed from the receiving portion of the holder body.
A machine die apparatus in accordance with the present disclosure may include a holder body having a receiving portion configured for selective engagement with a coupling end of a machine die; and a magnetic coupling assembly comprising one or more magnetic elements configured to generate a magnetic coupling adapted for the selective engagement of the holder body with the coupling end of the machine die. Examples may further include an actuator configured to manipulate at least one of the magnetic elements to modulate a strength of the magnetic coupling for selective engagement and disengagement of the holder body with the coupling end of the machine die.
In some embodiments, the magnetic elements may include one or more permanent magnets and one or more ferromagnetic components, and the actuator may be configured to selectively move at least one of the permanent magnets or ferromagnetic components to modulate the strength of the magnetic coupling by forming a flux path therebetween. In some examples, the actuator may be configured to manipulate at least one of the magnetic elements of the magnetic coupling assembly between a locked position, in which the coupling end of the machine die is selectively engaged within the receiving portion of the holder body, and an alternate unlocked position, in which the coupling end of the machine die is selectively disengaged from the receiving portion of the holder body. In some embodiments, in the locked position, the magnetic coupling may support a weight of the machine die disposed within the receiving portion of the holder body.
In any of the above examples and embodiments, the one or more magnetic elements may include at least one electromagnet configured to selectively generate a magnetic flux to modulate the strength of the magnetic coupling. Some embodiments may further include one or more mechanical coupling members comprising at least one clamp, screw, cam, or lever configured to secure the coupling end of the machine die within the receiving portion of holder body. Examples may further include one or more decoupling members configured to mechanically urge the machine die away from the holder body such that the machine die may be removed from the holder body.
Methods of operating a machine tool apparatus can be performed according to any of the examples and embodiments above. Suitable applications of the mechanisms and techniques described in this disclosure also include, but are not limited to, the following enumerated examples and embodiments.
A punch holder, or an upper tool holder for a folding press or press brake, is disclosed. The punch holder has a downward opening cavity designed to receive a punch or punch insert with a top protrusion or tang that fits into said holder cavity. The punch holder includes a magnetic restraining means for holding said punch or punch insert in said press brake using magnets or a magnetic assembly that urge or retain the punch or punch insert upward into a holder receiving cavity for placement or staging until said holder is fully activated, whence said punch is solidly clamped in place for use.
In the above example, the punch holder may comprise a switchable or adjustable magnetic assembly for holding a punch or punch insert in said press brake, said magnetic assembly having two or more states: one state with a stronger magnetic attraction for retaining the punch or punch insert in the holder, and another state with less or nil magnetic attraction to allow release of said punch or punch insert from said tool holder. The tool holder thus has a locked position, wherein said punch or punch insert is securely held in said holder, an unlocked position, wherein said punch or punch insert can be manually installed in or removed from said punch holder, and/or any variety of intermediate states of magnetic attraction, such as could be useful for staging a set of punches or punch inserts for use.
In any of the above examples and embodiments, the punch holder may comprise an assembly of permanent magnets and ferromagnetic parts arranged to work cooperatively in a magnetic circuit, with some magnet or magnets configured to be selectively moveable such that said magnetic circuit can be debilitated or weakened, as for punch or punch insert installation or removal, or alternatively positioned so as to be optimized or enabled, to facilitate secure retention of punch or punch insert in the holder until said holder is activated to clamp said punch or punch insert solidly in the holder for folding operation.
In any of the above examples and embodiments, the punch holder may comprise an assembly of permanent magnets and ferromagnetic parts arranged to work cooperatively in a magnetic circuit, with some ferromagnetic part or parts configured to be selectively moveable such that said magnetic circuit can be debilitated or weakened (as for punch or punch insert installation or removal), or alternatively positioned so as to be optimized or enabled, to facilitate secure retention of punch or punch insert in the holder.
In any of the above examples and embodiments, the punch holder may comprise a magnetic assembly that includes one or more electromagnets which can be switchable or adjustable to selectively aid or conflict with the magnetic circuit, thereby effecting retention or release of said punch or punch insert.
In any of the above examples and embodiments, the punch holder may comprise a downward opening cavity in said tool holder formed by a solid or stationary protrusion extending downward on one side of said opening, and a moveable or articulated downward extending protrusion on the other side of a gap. Together, the solid or stationary protrusion and moveable or articulated protrusion form said opening, which is designed to receive a punch or punch insert with a top protrusion or tang that fits into said holder cavity or opening, with said magnetic assembly configured to urge both punch or punch insert and said moveable protrusion tightly into an acceptable position for use or for further clamping.
In any of the above examples and embodiments, the punch holder may comprise a magnetic assembly that completes a magnetic circuit through the punch or punch insert, which may be made of a highly ferromagnetic material.
In any of the above examples and embodiments, the punch holder may comprise a magnetic force sufficiently strong in the clamped or locked state such that no additional clamping means is needed for press operation.
In any of the above examples and embodiments, the punch holder may comprise a supplementary mechanical clamping means, such as a cam and lever, or set screws, to solidly clamp the punch or punch insert in place for folding press operation.
In any of the above examples and embodiments, the selectively moveable magnet or magnets may move slidably.
In any of the above examples and embodiments, the selectively moveable magnet or magnets may move rotatably.
In any of the above examples and embodiments, the selectively moveable ferromagnetic part or parts may move slidably.
In any of the above examples and embodiments, the selectively moveable ferromagnetic part or parts may move rotatably.
In any of the above examples and embodiments, optimization of the magnetic circuit, and thus the magnetic force on the punch or punch insert may be fully adjustable.
In any of the above examples and embodiments, the magnetic clamping means may be controlled electronically and may include feedback from a sensor detecting the presence of the punch or punch insert, such that the magnetic force can be increased as needed to keep the punch or punch insert seated in the holder.
In any of the above examples and embodiments, the magnetic assembly may employ electromagnets or permanent magnets built into the articulated or moveable part of the holder.
In any of the above examples and embodiments, the magnetic assembly may employ electromagnets or permanent magnets built into the fixed or non-moveable part of the holder.
In any of the above examples and embodiments, a mechanical means may be included for leveraging or prying the punch or punch insert away from the holder, or at least far enough away so as to weaken the magnetic circuit sufficiently to allow removal of said punch or punch insert from said holder.
In any of the above examples and embodiments, the magnetic assembly or assemblies may employ a bi-stable or non-momentary clamped and released state.
In any of the above examples and embodiments, one or more magnetic assemblies or multiple banks of magnetic holder subassemblies may be arranged along the length of the punch holder.
A punch holder for holding a punch in a folding press or press brake with a downward opening cavity in said tool holder is disclosed. The punch holder is designed to receive a punch or punch insert with a top protrusion or tang that fits into said holder cavity, said holder using a non-switchable permanent magnet assembly or a permanent magnet or an array of magnets to urge or retain the punch or punch insert upward into said receiving cavity.
In any of the above examples and embodiments, said downward opening cavity in said tool holder may be formed by a solid or stationary protrusion extending downward on one side of said opening, and a moveable or articulated downward extending protrusion on the other side of a gap, forming said opening, which is designed to receive a punch or punch insert with a top protrusion or tang that fits into said holder cavity or opening, with said magnetic assembly configured to urge both punch or punch insert and said moveable protrusion tightly into an acceptable position for use or for further clamping.
In any of the above examples and embodiments, the magnetic assembly may employ a magnet or magnets built into the fixed or non-moveable part of the holder.
In any of the above examples and embodiments, the magnetic assembly may employ a magnet or magnets built into the articulated or moveable part of the holder.
In any of the above examples and embodiments, a mechanical means for directly leveraging or prying the punch or punch insert away from the holder may be included.
A die holder, or lower tool holder for a folding press or press brake, is disclosed. The die holder may include an upward opening cavity designed to receive a die or die insert with a bottom protrusion or tang that fits into said holder cavity, with a magnetic restraining means for securing said die or die insert in said press brake, thereby sufficiently holding said die or die insert securely in place for use or until additional clamping is engaged.
In any of the above examples and embodiments, the die holder may comprise a switchable or adjustable magnetic assembly to urge or retain the die securely in said holder receiving cavity, thus clamping said die or die insert solidly in place for use, the die holder thus having a clamped position wherein said die or die insert is securely restrained in said die holder, or a released position, wherein said die or die insert can be manually installed in or removed from said die holder.
In any of the above examples and embodiments, an assembly of permanent magnets and ferromagnetic parts may be arranged to work cooperatively in a magnetic circuit, with some magnet or magnets, or ferromagnetic parts, configured to be selectively moveable such that said magnetic circuit can be debilitated or weakened, as for die or die insert installation or removal, or alternatively positioned so as to be optimized or enabled, to facilitate secure retention of the die or die insert in the holder.
In any of the above examples and embodiments, the magnetic assembly may include one or more electromagnets which can be switchable or adjustable to selectively aid or conflict with the magnetic circuit, thereby effecting retention or release of said die or die insert.
In any of the above examples and embodiments, the magnetic force may be sufficiently strong in the clamped state so that no additional clamping means is needed for press operation.
In any of the above examples and embodiments, the die holder may comprise a supplementary mechanical clamping means, such as a cam and lever, or set screws, to solidly clamp the die or die insert in place for folding press operation.
In any of the above examples and embodiments, the die holder may comprise a mechanical means for directly leveraging or prying the die or die insert away from the holder.
A machine tool apparatus is disclosed. The machine tool apparatus includes a tool holder defining a receiving portion configured for selective engagement with a coupling end of a machine tool insert; a magnetic coupling assembly comprising one or more magnetic elements configured to generate a magnetic coupling adapted for the selective engagement of the tool holder with the coupling end of the machine tool insert; and an actuator configured to manipulate at least one of the magnetic elements to modulate a strength of the magnetic coupling for selective engagement and disengagement of the tool holder with the coupling end of the machine tool insert.
In the above example, the magnetic elements may comprise one or more permanent magnets or one or more ferromagnetic components, the actuator being configured to selectively move at least one of the permanent magnets or the ferromagnetic components with respect to another of the permanent magnets or the ferromagnetic components to modulate the strength of the magnetic coupling by modulating a magnetic reluctance of a flux path therebetween.
In any of the above examples and embodiments, the magnetic elements may comprise one or more flux guides configured to guide a magnetic flux between the tool holder and the machine tool insert, the strength of the magnetic coupling being further responsive to the magnetic flux guided therebetween.
In any of the above examples and embodiments, the actuator may be configured to manipulate at least one of the magnetic elements of the magnetic coupling assembly between an engaged position in which the coupling end of the machine tool insert is selectively engaged within the receiving portion and an alternate disengaged position in which the coupling end of the machine tool insert is selectively disengaged from the receiving portion.
In any of the above examples and embodiments, the actuator may be configured to manipulate the at least one magnetic element by rotation or displacement with respect to another of the magnetic elements.
In any of the above examples and embodiments, the one or more magnetic elements may be responsive to actuation of the actuator such that the engaged and disengaged positions are bi-stable.
In any of the above examples and embodiments, in the engaged position, the magnetic coupling may support a weight of the machine tool insert disposed within the receiving portion.
In any of the above examples and embodiments, the machine tool apparatus may further comprise an adjustment mechanism configured to adjust a maximum strength of the magnetic coupling to support the weight of the machine tool insert when disposed within the receiving portion.
In any of the above examples and embodiments, at least one of the magnetic elements may be configured to slide to selectively form the flux path, and to break or modulate the strength thereof.
In any of the above examples and embodiments, at least one of the magnetic elements may be configured to rotate to selectively form the flux path, and to break or modulate the strength thereof.
In any of the above examples and embodiments, the one or more magnetic elements may comprise at least one electromagnet configured to selectively generate a magnetic flux to modulate the strength of the magnetic coupling.
In any of the above examples and embodiments, the actuator may comprise an electronic controller electronically coupled with the magnetic coupling assembly, the electronic controller coupled with a feedback sensor configured to detect the machine tool insert within the receiving portion.
In any of the above examples and embodiments, the receiving portion may comprise a cavity defined by an inner surface of the tool holder and a clamping member configured for selective engagement with the coupling end of the machine tool insert disposed within the cavity.
In any of the above examples and embodiments, the magnetic coupling assembly may further comprise one or more magnetic elements embedded within the clamping member or the inner surface of the tool holder.
In any of the above examples and embodiments, the one or more magnetic elements may comprise one or more permanent magnets and one or more ferromagnetic components.
In any of the above examples and embodiments, the machine tool apparatus may further comprise one or more mechanical coupling members comprising at least one clamp, screw, cam, or lever configured to secure the coupling end of the machine tool insert within the receiving portion.
In any of the above examples and embodiments, the machine tool apparatus may further comprise one or more decoupling members configured to mechanically urge the machine tool insert away from the tool holder such that the machine tool insert may be removed from the receiving portion.
In any of the above examples and embodiments, the magnetic coupling assembly may comprise a plurality of magnetic tool holder sub-assemblies arranged along a length of the tool holder, each of the sub-assemblies comprising one or more magnetic elements configured to generate magnetic flux to provide the magnetic coupling adapted for the selective engagement of the tool holder with the coupling end of one or more such machine tool inserts.
In any of the above examples and embodiments, a plurality of machine tool inserts may be engaged within the plurality of magnetic tool holder subassemblies.
A machine tool assembly is disclosed. The machine tool assembly may comprise a tool holder body defining a receiving portion configured for engagement with a coupling end of a machine tool insert; and a magnetic coupling assembly comprising one or more magnetic elements configured to generate a magnetic coupling adapted for the engagement of the tool holder with the coupling end of the machine tool insert.
In the above example, the receiving portion of the tool holder body may comprise a cavity defined by an inner surface of the tool holder body and a clamping member, the clamping member configured for engagement with the coupling end of the machine tool insert in response to activation of the magnetic coupling.
In any of the above examples and embodiments, the magnetic coupling assembly may further comprise one or more magnetic elements embedded within the inner surface of the tool holder body.
In any of the above examples and embodiments, the magnetic coupling assembly may further comprise one or more magnetic elements embedded within the clamping member.
In any of the above examples and embodiments, the machine tool assembly may further comprise one or more decoupling members configured to mechanically urge the machine tool insert away from the tool holder body such that the machine tool insert may be removed from the receiving portion of the tool holder body.
A machine die apparatus is disclosed. The machine die apparatus may comprise a tool holder body having a receiving portion configured for selective engagement with a coupling end of a machine die; and a magnetic coupling assembly comprising one or more magnetic elements configured to generate a magnetic coupling adapted for the selective engagement of the tool holder body with the coupling end of the machine die.
In the above example, the machine die apparatus may further comprise an actuator configured to manipulate at least one of the magnetic elements to modulate a strength of the magnetic coupling for selective engagement and disengagement of the tool holder body with the coupling end of the machine die.
In any of the above examples and embodiments, the magnetic elements may comprise one or more permanent magnets and one or more ferromagnetic components, and the actuator may be configured to selectively move at least one of the permanent magnets or ferromagnetic components to modulate the strength of the magnetic coupling by inducing a flux path therebetween.
In any of the above examples and embodiments, the actuator may be configured to manipulate at least one of the magnetic elements of the magnetic coupling assembly between a locked position in which the coupling end of the machine die is selectively engaged within the receiving portion of the tool holder body and an alternate unlocked position in which the coupling end of the machine die is selectively disengaged from the receiving portion of the tool holder body.
In any of the above examples and embodiments, in the locked position, the magnetic coupling may prevent lateral movement of the machine die disposed within the receiving portion of the tool holder body.
In any of the above examples and embodiments, the one or more magnetic elements may comprise at least one electromagnet configured to selectively generate a magnetic flux to modulate the strength of the magnetic coupling.
In any of the above examples and embodiments, the machine die apparatus may further comprise one or more mechanical coupling members comprising at least one clamp, screw, cam, or lever configured to secure the coupling end of the machine die within the receiving portion of tool holder body.
In any of the above examples and embodiments, the machine die apparatus may further comprise one or more decoupling members configured to mechanically urge the machine die away from the tool holder body such that the machine die may be removed from the tool holder body.
A machine die apparatus is disclosed. The machine die apparatus may comprise a tool holder body having a receiving portion configured for engagement with a coupling end of a machine die; and a magnetic coupling assembly comprising one or more magnetic elements configured to generate a magnetic coupling adapted for the engagement of the tool holder body with the coupling end of the machine die.
In the above example, the magnetic elements may comprise one or more permanent magnets and one or more ferromagnetic components.
In any of the above examples and embodiments, the machine die apparatus may further comprise one or more decoupling members configured to mechanically urge the machine die away from the tool holder body such that the machine die may be removed from the tool holder body.
A method of operating a machine tool apparatus is disclosed, according to any of the examples and embodiments above.
While this invention has been described with respect to particular examples and embodiments, changes can be made and equivalents can be substituted in order to adapt these teaching to other configurations, materials and applications, without departing from the spirit and scope of the invention. The invention is not limited to the particular examples that are disclosed, but encompasses all embodiments that fall with the scope of the claims.
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