The present invention relates to a collet chuck for clamping a tool for machining a work piece, a collet for clamping the work piece, and a progressive die for machining a work piece.
Known in prior art are chucks for receiving collets for clamping work pieces, for example mills, drills, reamers, and countersinks. Using collets for clamping work pieces results in a high true running accuracy, even at high speeds for the tools.
Machining a work piece in several sequential working operations requires a certain machining time. One way to reduce this machining time can involve simultaneously implementing previously sequential working operations.
Therefore, the object is to provide a possible way of machining a work piece by means of tools clamped with collets, wherein, if several working operations are required, the goal is to allow these working operations to chronologically overlap or intersect.
Provided as a first embodiment of the invention is a collet chuck for clamping a tool for machining a work piece, comprising: A cutout for receiving a collet, wherein the collet chuck exhibits a cutting edge for machining the work piece.
The cutting edge of the collet chuck can consist of PKD or CBN, and be soldered onto or into the collet chuck. In an alternative embodiment, the cutting edge can be designed as a removable disk.
Arranging one, two or however many cutting edges desired on a collet chuck makes it possible to set up a progressive die, so that previously sequential working operations can be executed in such a way as to chronologically overlap.
Provided as a second embodiment of the invention is a collet for clamping a tool, wherein the collet is suitable for insertion into a collet chuck according to one of claims 1 to 3, wherein the collet can be moved along the longitudinal axis of the collet chuck to vary the radial distance between the cutting edge and longitudinal axis.
According to the invention, a collet can be designed in such a way as to perform a dual function. On the one hand, a collet according to the invention can be used for clamping a machining tool, for example a drill, a mill, a reamer or a countersink, so that a high true running accuracy can be ensured, even at high speeds. On the other hand, the collet can be designed as an expanding tool, making it possible to vary the cutting edges of a collet chuck in terms of its radial distance from the longitudinal axis of the collet chuck with the collet inserted. As a result, the radial position of the cutting edges of the collet chuck can be finely adjusted.
Provided as a third embodiment of the invention is a progressive die for machining a work piece, comprising: A tool for machining, a collet according to claim 4, and a collet chuck according to one of claims 1 to 3, wherein the tool can be clamped into the collet chuck by means of the collet.
Provided as a fourth embodiment of the invention is a bushing to be pulled onto a collet chuck, wherein the bushing exhibits one or however many cutting edges desired and/or one or however many T-slots desired.
A bushing to be pulled on provides an easy way to make a cutting head out of a chuck, so that a progressive die can be generated.
Exemplary embodiments are described in the dependent claims.
Provided in an exemplary embodiment is a collet chuck, wherein a cutting edge is situated in proximity to the cutout.
Arranging the cutting edge in a front region of the collet chuck makes it possible to relatively extensively chronologically overlap two machining processes, so that the machining time for a work piece can be shortened.
Provided in another embodiment according to the invention is a collet chuck, wherein the cutting edge is a cutting insert, in particular a replaceable cutting insert, and/or wherein the cutting edge is triangular or quadrangular in design.
The advantage to a cutting insert is that it can be replaced, so that the operational capability of the collet chuck can be restored more quickly given worn cutting edges. Replaceable cutting inserts, whether triangular or quadrangular, can further shorten the period for restoring operational capability.
Another exemplary embodiment of the present invention provides a progressive die, wherein the collet has a fragile design.
A “fragile” design makes it possible to “create space” for arranging one or however many cutting edges and/or T-slots desired on a corresponding collet chuck or progressive die.
Provided according to an exemplary embodiment of the invention is a progressive die, wherein the collet can be shifted along a longitudinal axis of the progressive die to vary the radial distance between the cutting edge and the longitudinal axis.
A collet designed as an expanding tool enables a fine adjustment of the radial position of the cutting edges arranged on the collet chuck.
Provided in another embodiment according to the invention is a progressive die, wherein the progressive die encompasses a sleeve, wherein the sleeve is situated between the collet and collet chuck.
A sleeve between the collet and collet chuck enables a finer adjustment of the radial distance between the cutting edge and the longitudinal axis of the progressive die on the collet chuck, since the sleeve permits a gradual sliding from the collet to the collet chuck.
Provided according to another exemplary embodiment of the present invention is a progressive die, wherein the sleeve consists of copper, brass, plastic, rubber or some other type of plastic material.
Designing the sleeve out of copper, brass, plastic, rubber or some other type of plastic material enables a particularly fine adjustment, since the copper, brass, plastic, rubber or other type of plastic material allows the collet to “slide” in the collet chuck to an especially great extent.
It may be regarded as one idea of the invention to design a collet in such a way, specifically to be fragile, as to leave enough space in the front region of the collet chuck to accommodate one or more cutting edges. In another embodiment, the collet can also be used to vary the cutting edges in terms of their radial distance from the longitudinal axis of the collet chuck.
Of course, the individual features can be combined with each other, which can in part also yield advantageous effects going beyond the sum of individual effects.
Additional details and advantages of the invention become evident based on the exemplary embodiments depicted in the drawings. Shown on:
The expanding tool 918 can further exhibit a male thread 911, whose teeth can engage into teeth of a female thread 910. The female thread 910 can be arranged on a worm wheel 909, wherein the worm wheel 909 can be part of a worm gear. The worm gear can encompass the worm wheel 909 with teeth 908, 912 and a worm 905, wherein the teeth of the worm 905 can engage into the teeth 908, 912 of the worm wheel 909. The worm gear can be mounted inside the cutting head 919 by way of roller bearings 904, 907, 913, 914, wherein the roller bearings 904, 907, 913, 914 can be designed as ball bearings. For example, the worm 905 can exhibit a hexagon socket (Allen) 906, a recess, a cross recess, a Torx, a square box or some other intermeshing option. For example, a socket wrench can be inserted into the mesh 906 of the worm 905, wherein the worm 905, and hence also the worm wheel 909, can be rotated or made to rotate by turning the socket wrench. As a result, the expanding tool 918 can be removed toward the left or inserted toward the right, wherein the outer cone 916 of the expanding tool 918 can be pressed against the inner cone 917, making it possible to enlarge the radial distance 920 between the cutting insert 915 and the longitudinal axis 921. The edge 922 of the worm wheel 909 can be used as a stop for the cylindrical section 903 of the expanding tool 918, so as to prevent an overexpansion of the cutting head 919 and a potential breakage. The edge 923 of the worm wheel 909 can be used as a stop for the projection of the expanding tool 918 with its male thread 911. Given the arrangement of a worm gear with its worm wheel 909 and the worm 905, no torque is transmitted to the expanding tool 918. For this reason, the expanding tool 918 can also not end up rotating around its longitudinal axis 921. This eliminates the need for a locking device to prevent oration.
In an alternative embodiment in which additional circumstances make it possible to transmit a torque to the expanding tool 918, a locking device can be situated on the cutting system by virtue of the fact that a pin projects into the recess of the cutting head 919, and can be guided into a groove arranged on the expanding tool 918. This makes it possible to prevent the expanding tool 918 from rotating around its own longitudinal axis 921.
The radial distance between the first cutting inserts 1008 and the longitudinal axis of the cutting head 1007 can be adjusted with the expanding tool 1010, wherein the expanding tool 1010 can be moved to the left or right by means of a worm gear having a worm wheel 1006 and a worm 1004. If the expanding tool 1010 is moved to the right, the cutting inserts 1008 can be pressed further radially outward. Aside from an outer cone 1002 and a cylindrical section 1003, the expanding tool 1010 can exhibit another cutting head 1001 with additional cutting inserts 1009, so that a two-step reamer can be realized, for example. In an alternative embodiment, another expanding tool with even more reamers can be inserted into the additional reamer, thereby enabling a 3-step reamer. The additional expanding tool can also be designed as a collet. In further alterative embodiments, reamers with as many steps as desired can be provided.
In another embodiment of the invention, a sleeve can be provided between the hollow shank taper of the cutting head/collet chuck and outer cone of the expanding tool/collet, wherein the sleeve can help improve how the expanding tool and cutting head are able to slide. This enables a more precise and reproducible adjustment of the radial distance between the cutting inserts and the longitudinal axis of the tool. In particular, this makes it possible to prevent the outer cone from hooking the hollow shank taper of the cutting head, so that jerky movements between the expanding tool and cutting head can be avoided. The sleeve can consist of a material that is harder or softer by comparison to the outer cone and/or cutting head. In particular, the sleeve can consist of copper, brass, plastic, rubber or some other type of plastic material. An especially good sliding of the expanding tool and cutting head can be enabled in particular by the selection of sleeve material, wherein copper, brass, plastic, rubber or some other type of plastic material appear to be especially advantageous in this connection. Increasing the conical outer or inner lateral surface of the sleeve also makes it possible to determine how fine or strong a change can be made in the radial distance between the cutting edges of the cutting head and the longitudinal axis. If the outer or inner taper angle is small, a very fine adjustment is possible. A larger taper angle enables a coarse adjustment.
Let it be noted that the term “encompassing” does not preclude other elements or procedural steps, just as the terms “an” and “a” do not rule out several elements and steps.
The used references serve only to enhance understandability, and are in no way be construed as limiting, wherein the claims reflect the protective scope of the invention.
101 T-slot
102 Cutting edge
103 Hollow shank taper interface
104 Collet chuck
105 Mesh for socket wrench
201 Collet chuck
202 Cutting edge
203 Cutout for receiving a collet
301 Collet
302 T-slot
303 Collet chuck
304 Hollow shank taper interface
305 Longitudinal axis
306 Cutting edge
307 Male thread
308 Cylindrical section
309 Outer cone
310 Gap
401 Male thread
402 Outer cone
403 Cylindrical section
404 Gap
501 Gap
502 Cutout for receiving a tool
503 Inner radius
504 Outer radius
601 Tool
602 Collet chuck
603 Hollow shank taper interface
604 Cutting edge
701 Cutting edge
702 Cutout for receiving a collet
703 Longitudinal axis
801 T-slot
802 Coolant channel
803 Cutting edge
804 Cutout for receiving a collet
901 T-slot
902 Cutting head
903 Cylindrical section
904 Roller bearing
905 Worm
906 Hexagon socket
907 Roller bearing
908 Teeth
909 Worm wheel
910 Female thread
911 Male thread
912 Teeth
913 Roller bearing
914 Roller bearing
915 Cutting edge
916 Outer cone
917 Inner cone
918 Expanding tool/collet
919 Cutting head
920 Radial distance
921 Longitudinal axis
922 Stop
923 Stop
1001 Cutting head
1002 Outer cone
1003 Cylindrical section
1004 Worm
1005 Male thread
1006 Worm wheel
1007 Cutting head
1008 Cutting edge
1009 Cutting edge
1010 Expanding tool/collet
1101 Inner cone
1102 Female thread
1103 Cutout
1201 Expanding tool/collet
1202 Male thread
1203 Outer cone
1301 Cutting head
1302 Female thread
1303 Male thread
1304 Hexagon socket
1305 Threaded bolt
1306 Male thread
1307 Female thread
1308 Expanding tool/collet
1401 Cutting head
1402 Threaded bolt
1403 Hexagon socket
1404 Female thread
1405 Projection
1406 Washer
1407 Expanding tool/collet
1408 Male thread
1501 T-slot
1502 Cutting edge
1503 Bushing
1504 Receptacle for collet
1505 Mesh for socket wrench
1506 Hollow shank taper interface
1507 Pulling-on direction
1508 Pulling-on direction
Number | Date | Country | Kind |
---|---|---|---|
10 2010 014 011.2 | Apr 2010 | DE | national |
10 2010 014 186.0 | Apr 2010 | DE | national |
10 2011 001 742.9 | Apr 2011 | DE | national |
Number | Date | Country | |
---|---|---|---|
Parent | PCT/EP2011/055223 | Apr 2011 | US |
Child | 13630101 | US |