Patent Application
20240308804
The present document relates to processing web material, and more particularly, to techniques for a laser system with an adjustable field of view for processing web material
Processing moving web material with a laser can open up new avenues for generating web-based products. Laser processing can be very precise and can cut or slit the web in very intricate patterns. However, the field of view of conventional laser systems when employed on a web machine is somewhat fixed, therefore, in order to form parts that require a different field of view, the web path at the laser processing station is modified. Such web path modification can be time consuming and can require a part kit for each different field of view setting. In addition, once the field of view is changed, the laser often needs to be refocused to provide an focused beam at the surface of the web material in the new web path.
Techniques for processing a web with a laser are provided. In an example, an apparatus for processing web material can include multiple processing stages and a laser assembly. Each of the multiple processing stages can be configured to process a moving web of material along a web path. The laser assembly can be configured to process the moving web of material with a laser at a first stage of the multiple stages. The laser assembly can include a laser configured to generate a laser beam, a gimble assembly configured to direct the laser beam along a cut path at a position of a web path of the moving web of material, and a servo driven mirror assembly configured to provide an adjustable field of view for the laser stage at the position of the web path.
This section is intended to provide an overview of subject matter of the present patent application. It is not intended to provide an exclusive or exhaustive explanation of the invention. The detailed description is included to provide further information about the present patent application.
Examples of the present disclosure are generally directed to techniques for processing a web material in a web machine using a laser with an adjustable field of view. In certain examples, the field of view of the laser system can be adjusted on-the-fly without modifying a web path of the web material. Conventional systems can require that the web path be mechanically raised or lowered to accommodate using a different field of view of a laser. Mechanically adjusting a web path of a web machine can be a time-consuming and multiple step process. Such complexity can introduce opportunities for mistakes that can further result in time-lost to diagnose and correct. The present subject matter allows a portion of a laser apparatus to be raised and lower via servo control to adjust the field of view. In addition, a servo-driven focusing mechanism can also be adjusted, either manually or via formulaic response to the field of view setting, such that the laser beam interface with the web material is at or very near the most efficient focal setting for the type of laser operation.
In some examples, the mounting assembly 102 can accommodate various interchangeable mechanical processing components at any one position. The illustrated machine shows seven positions, but it is understood that more or less positions for mounting a processing station can be provided without departing from the present subject matter. The interchangeable mechanical processing components can include, but are not limited to, a die station, a nip station, a coating station, a tamping station, a sealing station, an ultrasonic weld station, or combinations thereof. Once an interchangeable component is installed at a station, if need be, a drive shaft of the interchangeable component can protrude through an access opening 109 of the mounting faceplate and engage a servo motor assembly located in the mechanical cabinet 104 such that a servo motor, via an optional gearbox, can move the at least a portion of the interchangeable component. In certain examples, the rods 108 of mounting assembly 102 can provide a coupling point to secure the interchangeable mechanical processing components at the station position. In some examples, the conduit 110 protruding through a backplate 105 at each position can accommodate ancillary connections of the processing station such as, but not limited to, pneumatic connections for the processing station, electrical connections for sensors or actuators of the processing station, or combinations thereof.
Each processing station can include an adjustment mechanism 111 mounted to the faceplate of the mounting assembly 102 to adjust alignment of the interchangeable component in the cross-web direction. As an example, such alignment can allow a first die cut operation to be aligned in the cross-web direction with subsequent operations such as a subsequent, second die cut. Additional user input devices (not shown) may also be mounted to the faceplate of the mounting assembly 102 to accommodate machine operation and safety.
The spindles 103 can typically be used to unwind raw web material for processing by the web machine or to rewind waste material or finished web material. Some spindles 103 may be servo driven. Some spindles 103 may be pneumatically driven. In certain examples, tension applied to the web material for unwinding or rewinding can be adjusted via the HMI 107 or optionally via a sensor or valve located near the spindle 103. In some examples, a spindle 103 can have an adjustable position to accommodate various different products that may be scheduled to be produce on the machine. In certain examples, a spindle 103 can include a web guide mechanism to align a first web material in a cross-web direction with other processing steps or other web material being processed or to rewind web material in an aligned fashion.
The adjustable field of view laser system 101 can include a laser base 112, a laser head 113, and a laser station assembly 114. The laser head 113 can include a lower laser head portion, and an upper laser head portion. In certain examples, the laser base 112 can be mounted to the top of the mechanical cabinet 104 of the web processing machine 100. The upper portion of the laser head 113 can be mounted to a component of the laser base 112. The lower portion of the laser head 113 can be mounted to the upper portion of the laser head portion 113. The laser base 112 can include the laser and optical components to pass a laser beam of the laser to the laser head 113. In some examples, the laser base 112 can include a carriage mechanism to allow the laser head 113 to be positioned at a first processing station of the web machine 100 for production of a first part, and at a second processing station of the web machine 100 for production of a second part. The lower portion of the laser head 113 be mounted to the upper portion of the laser head 113 via a servo driven carriage such that the field of view of the laser at the web path can be adjusted to the size of the part being produced or to at least the size of the area of the web path on which the laser is to be applied.
The optical components 220, 222, 224 can include multiple mirror assemblies 222, 224 and a laser collimator 220. The multiple mirror assemblies 222, 224 direct the laser beam from the output of the laser 218 to the laser head. The laser collimator 220 provides a collimated beam of laser light. Upon exiting the laser 218, the beams of laser light can be somewhat scattered and not parallel. As such, there is a large chance that a significant portion of the laser light will be lost while trying to direct it to the laser head. The laser collimator 220 captures a significant portion of the scattered beams before they are scattered too far and aligns those beams to provide a collimated beam of laser light. The collimated beam is a beam of laser light that includes a large number of parallel beams resulting in low beam divergence. As such, the beam can travel significant distances without a significant change in the cross-section radius.
The laser base 112 can also include a pair of mounts 240 for a flexible conduit (not shown). At least one of the mounts 240 can include an extended support to keep the flexible conduit from drooping. The flexible conduit can house various tubing and wiring for power and signaling associated with the laser head.
To facilitate the motion of the lower portion 344, the upper portion 342 can include linear bearings 356 and a lead screw nut 358. The linear bearings 356 can guide linear rails 360 of the lower portion 344 and the lead screw nut 358 can transfer rotational motion of a lead screw 362 of the lower portion 344 into linear motion of the lower portion 344 relative to the upper portion 342. The lower portion 344 can include a servo motor 364 to rotate the lead screw 362. The lower portion 344 can also include a gimble assembly 352, a focusing assembly 354, and an opening 366 to project the laser beam toward the web path of the web machine. In certain examples, both the upper and lower portions 342, 344 of the laser head 113 can include tubing 368 to visually isolate the laser beam. The tubing 368 of the upper portion 342 can receive the tubing 368 of the lower portion 344, like a telescope, to allow for adjustment of the field of view.
The gimble motor and lens assembly 476 can be mounted with the focusing optics 470, such as one or more focusing lenses, to the focus carriage 472. The focus carriage 472 can be mounted to the focus lead screw assembly via linear bearings 469 and a lead screw nut 473. Rotation of the lead screw 475 of the lead screw assembly can move the focusing optics 470 along an axis defined by the collimated laser beam. Although the collimated laser beam is well defined, as the field of view of the laser system at the web material is adjusted, the focusing optics 470 can provide fine adjustment of the laser beam at the web material. Such fine focusing adjustment can improve product quality over a laser beam without fine adjustment. The lead screw 475 can be driven by a servo motor 477 coupled to a controller and drive of the web machine by one or more cables 479. The lead screw assembly can be coupled to a frame of the lower portion of the laser head. For example, the lead screw 475 can be supported by two lead screw bearings within corresponding bearing supports 474 that can each be bolted to the frame of the lower portion of the laser head.
In certain examples, the lower portion 578 can include two idler rolls 585 for guiding the web material through the laser processing station 114. The lower portion 578 can include a grated surface 586 to support the web material between the idler rolls 585 and to allow fumes to be evacuated via the lower vent hood 581 underneath the grated surface 586. In certain examples, the lower portion 578 can include a registration sensor assembly. The registration sensor assembly can include a mounting bracket 587 and a registration sensor 588. The mounting bracket 587 can support the registration sensor 588 and can allow the registration sensor 588 to be adjusted along the web path and across the web path. In some applications, the registration sensor 588 can be used to sense a repeating feature of the web material such that timing of operations of the laser station 114 or some other station can be adjusted by the controller to make acceptable parts. In some applications, the registration sensor 588 can be used to sense anomalies and the controller can track the sensed anomalies for rejection or some other processing.
In addition to illustrating the lower portion 578 of an example laser processing station,
In certain examples, the venting 583 and protective hardware 582 can provide additional barriers to enclose the processing area of the laser processing station 114. Such barriers can include an intake vent panel 591 to enclose a left side of the processing area of the laser processing station 114 and an exhaust vent panel 592 to enclose a right side of the processing area of the laser processing station 114. In certain examples, the intake vent panel 591 and the exhaust vent panel 592 can be secured to the mounting frame 580 of the lower portion of the laser processing station. In certain examples, to facilitate adjustment of the field of view of the laser processing station, the access door assembly can with the intake and exhaust vent panels 591, 592 via guide strips 593. Such an interface allows the field of view of the laser to be adjusted by raising or lowering the lower portion of the laser head and the processing area to remain sealed without disassembling or otherwise adjusting the venting 583 and protective hardware 582.
Air handling equipment can be coupled to the lower vent hood 581 and the exhaust vent panel 592 to safely contain and handle fumes generated in the processing area of the laser processing station 114. It is understood that assembly and orientation of the lower vent hood 581 and venting 583 and protective hardware 582 may be different than illustrated in
In some examples, changing the field of view of the adjustable field of view laser system can include using a servo motor to raise or lower a lower portion of a laser head of the adjustable field of view laser system. In certain examples, upon changing the field of view of the adjustable field of view laser system, a servo-driven focusing can be adjusted to maintain a focused beam of laser light at the surface of the web material passing through the laser processing station.
In some examples, the adjustable field of view laser system can be moved to a second processing position different than the position of a first processing station to process a different part. The positioning can be accomplished by moving a servo-driven carriage coupled to the laser head of the adjustable field of view laser system as discussed above with regard to
In alternative embodiments, the machine 700 may operate as a standalone device or may be connected (e.g., networked) to other machines. In a networked deployment, the machine 700 may operate in the capacity of a server machine, a client machine, or both in server-client network environments. In an example, the machine 700 may act as a peer machine in peer-to-peer (P2P) (or other distributed) network environment. The machine 700 may be a personal computer (PC), a tablet PC, a set-top box (STB), a personal digital assistant (PDA), a mobile telephone, a web appliance, a network router, switch or bridge, or any machine capable of executing instructions (sequential or otherwise) that specify actions to be taken by that machine. Further, while only a single machine is illustrated, the term “machine” shall also be taken to include any collection of machines that individually or jointly execute a set (or multiple sets) of instructions to perform any one or more of the methodologies discussed herein, such as cloud computing, software as a service (SaaS), other computer cluster configurations.
The machine (e.g., computer system) 700 may include a hardware processor 702 (e.g., a central processing unit (CPU), a graphics processing unit (GPU), a hardware processor core, or any combination thereof), a main memory 704, a static memory (e.g., memory or storage for firmware, microcode, a basic-input-output (BIOS), unified extensible firmware interface (UEFI), etc.) 706, and mass storage 708 (e.g., hard drives, tape drives, flash storage, or other block devices) some or all of which may communicate with each other via an interlink (e.g., bus) 730. The machine 700 may further include a display unit 710, an alphanumeric input device 712 (e.g., a keyboard), and a user interface (UI) navigation device 714 (e.g., a mouse). In an example, the display unit 710, input device 712 and UI navigation device 714 may be a touch screen display. The machine 700 may additionally include a storage device (e.g., drive unit) 708, a signal generation device 718 (e.g., a speaker), a network interface device 720, and one or more sensors 716, such as a global positioning system (GPS) sensor, compass, accelerometer, or other sensor. The machine 700 may include an output controller 728, such as a serial (e.g., universal serial bus (USB), parallel, or other wired or wireless (e.g., infrared (IR), near field communication (NFC), etc.) connection to communicate or control one or more peripheral devices (e.g., a printer, card reader, etc.).
Registers of the processor 702, the main memory 704, the static memory 706, or the mass storage 708 may be, or include, a machine readable medium 722 on which is stored one or more sets of data structures or instructions 724 (e.g., software) embodying or utilized by any one or more of the techniques or functions described herein. The instructions 724 may also reside, completely or at least partially, within any of registers of the processor 702, the main memory 704, the static memory 706, or the mass storage 708 during execution thereof by the machine 700. In an example, one or any combination of the hardware processor 702, the main memory 704, the static memory 706, or the mass storage 708 may constitute the machine readable media 722. While the machine readable medium 722 is illustrated as a single medium, the term “machine readable medium” may include a single medium or multiple media (e.g., a centralized or distributed database, and/or associated caches and servers) configured to store the one or more instructions 724.
The term “machine readable medium” may include any medium that is capable of storing, encoding, or carrying instructions for execution by the machine 700 and that cause the machine 700 to perform any one or more of the techniques of the present disclosure, or that is capable of storing, encoding or carrying data structures used by or associated with such instructions. Non-limiting machine-readable medium examples may include solid-state memories, optical media, magnetic media, and signals (e.g., radio frequency signals, other photon-based signals, sound signals, etc.). In an example, a non-transitory machine-readable medium comprises a machine-readable medium with a plurality of particles having invariant (e.g., rest) mass, and thus are compositions of matter. Accordingly, non-transitory machine-readable media are machine readable media that do not include transitory propagating signals. Specific examples of non-transitory machine-readable media may include: non-volatile memory, such as semiconductor memory devices (e.g., Electrically Programmable Read-Only Memory (EPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM)) and flash memory devices; magnetic disks, such as internal hard disks and removable disks; magneto-optical disks; and CD-ROM and DVD-ROM disks.
In an example, information stored or otherwise provided on the machine readable medium 722 may be representative of the instructions 724, such as instructions 724 themselves or a format from which the instructions 724 may be derived. This format from which the instructions 724 may be derived may include source code, encoded instructions (e.g., in compressed or encrypted form), packaged instructions (e.g., split into multiple packages), or the like. The information representative of the instructions 724 in the machine readable medium 722 may be processed by processing circuitry into the instructions to implement any of the operations discussed herein. For example, deriving the instructions 724 from the information (e.g., processing by the processing circuitry) may include: compiling (e.g., from source code, object code, etc.), interpreting, loading, organizing (e.g., dynamically or statically linking), encoding, decoding, encrypting, unencrypting, packaging, unpackaging, or otherwise manipulating the information into the instructions 724.
In an example, the derivation of the instructions 724 may include assembly, compilation, or interpretation of the information (e.g., by the processing circuitry) to create the instructions 724 from some intermediate or preprocessed format provided by the machine readable medium 722. The information, when provided in multiple parts, may be combined, unpacked, and modified to create the instructions 724. For example, the information may be in multiple compressed source code packages (or object code, or binary executable code, etc.) on one or several remote servers. The source code packages may be encrypted when in transit over a network and decrypted, uncompressed, assembled (e.g., linked) if necessary, and compiled or interpreted (e.g., into a library, stand-alone executable etc.) at a local machine, and executed by the local machine.
The instructions 724 may be further transmitted or received over a communications network 726 using a transmission medium via the network interface device 720 utilizing any one of a number of transfer protocols (e.g., frame relay, internet protocol (IP), transmission control protocol (TCP), user datagram protocol (UDP), hypertext transfer protocol (HTTP), etc.). Example communication networks may include a local area network (LAN), a wide area network (WAN), a packet data network (e.g., the Internet), mobile telephone networks (e.g., cellular networks), Plain Old Telephone (POTS) networks, and wireless data networks (e.g., Institute of Electrical and Electronics Engineers (IEEE) 802.11 family of standards known as Wi-Fi®, IEEE 802.16 family of standards known as WiMax®), IEEE 802.15.4 family of standards, peer-to-peer (P2P) networks, among others. In an example, the network interface device 720 may include one or more physical jacks (e.g., Ethernet, coaxial, or phone jacks) or one or more antennas to connect to the communications network 726. In an example, the network interface device 720 may include a plurality of antennas to wirelessly communicate using at least one of single-input multiple-output (SIMO), multiple-input multiple-output (MIMO), or multiple-input single-output (MISO) techniques. The term “transmission medium” shall be taken to include any intangible medium that is capable of storing, encoding or carrying instructions for execution by the machine 700, and includes digital or analog communications signals or other intangible medium to facilitate communication of such software. A transmission medium is a machine readable medium.
In a first example, Example 1, an apparatus can include multiple processing stations, each station configured to process a moving web of material along a web path; a laser assembly configured to process the moving web of material with a laser at a first station of the multiple processing stations, the laser assembly comprising: a laser configured to generate a laser beam; a gimble assembly configured to direct the laser beam along a cut path at a position of a web path of the moving web of material; and a servo-driven mirror assembly configured to provide an adjustable field of view for the laser assembly at the position of the web path.
In Example 2, the subject matter of Example 1 includes, a servo-driven focus assembly configured to adjust a focus of the laser beam in response to a change in the adjustable field of view.
In Example 3, the subject matter of Example 2 includes, a controller configured to coordinate positioning of the servo-driven mirror assembly and the servo-driven focus assembly to process multiple products without changing a vertical position of the web path at the first station.
In Example 4, the subject matter of Examples 1-3 includes, a backplate, wherein the multiple processing stations are coupled to the backplate.
In Example 5, the subject matter of Example 4 includes, wherein the multiple processing stations are cantilevered from the backplate.
In Example 6, the subject matter of Examples 1-5 includes, wherein the laser assembly includes a ventilation hood configured to capture and direct fumes of the first station.
In Example 7, the subject matter of Example 6 includes, wherein the ventilation hood includes a transparent member configured to allow observation of the moving web of material at the first station.
In Example 8, the subject matter of Examples 1-7 includes, wherein the laser assembly includes a lateral motion system configured to move the laser assembly along the web path and to position the laser assembly at a second station of the multiple processing stations.
Example 9 is a method of operating a web processing machine, the method can include positioning first web material along a web path including multiple processing stations; positioning a laser apparatus to form a laser processing station at a first station of the multiple processing stations; processing the first web material at the laser processing station using a first field of view of the laser apparatus to form a first part; processing a second web material at the laser processing station using a second field of view of the laser apparatus to form a second part; and wherein a position of the web path through the laser processing station does not change between forming the first part and forming the second part.
In Example 10, the subject matter of Example 9 includes, wherein an area defined by the first field of view is a different size than an area defined by the second field of view.
In Example 11, the subject matter of Examples 9-10 includes, re-positioning the laser processing station at a second station of the multiple processing stations to provide the second part.
In Example 12, the subject matter of Example 11 includes, wherein re-positioning the laser processing station includes moving a portion of the laser processing station laterally along the web path from the first station.
In Example 13, the subject matter of Examples 9-12 includes, wherein processing the second web material at the laser processing station using a second field of view of the laser apparatus includes re-positioning a mirror assembly of the laser apparatus, via a first servo motor, along an axis perpendicular to a plane defined by the second web material.
In Example 14, the subject matter of Example 13 includes, wherein processing the second web material at the laser processing station using a second field of view of the laser apparatus includes re-positioning a focus assembly of the laser apparatus, via a second servo motor, along an axis perpendicular to the plane defined by the second web material.
In Example 15, the subject matter of Examples 9-14 includes, wherein processing the first web material includes evacuating fumes from the first station via a vacuum hood of the laser apparatus.
Example 16 is a machine-readable medium including instructions that, when executed by processing circuitry, cause processing circuitry to perform operations, the operations can include moving a first web material along a web path including multiple processing stations; positioning a laser apparatus to form a laser processing station at a first station of the multiple processing stations; processing the first web material at the laser processing station using a first field of view of the laser apparatus to form a first part; processing a second web material at the laser processing station using a second field of view of the laser apparatus to form a second part; and wherein a position of the web path through the laser processing station does not change from forming the first part to forming the second part.
In Example 17, the subject matter of Example 16 includes, wherein an area defined by the first field of view is a different size than an area defined by the second field of view.
In Example 18, the subject matter of Examples 16-17 includes, wherein the operations include re-positioning the laser processing station at a second station of the multiple processing stations to provide the second part.
In Example 19, the subject matter of Example 18 includes, wherein the operations of re-positioning the laser processing station includes moving a portion of the laser processing station laterally along the web path from the first station.
In Example 20, the subject matter of Examples 16-19 includes, wherein the operations of processing the second web material at the laser processing station using a second field of view of the laser apparatus includes re-positioning a mirror assembly of the laser apparatus, via a first servo motor, along an axis perpendicular to a plane defined by the second web material.
In Example 21, the subject matter of Example 20 includes, wherein the operations of processing the second web material at the laser processing station using a second field of view of the laser apparatus includes re-positioning a focus assembly of the laser apparatus, via a second servo motor, along an axis perpendicular to the plane defined by the second web material.
Example 22 is at least one machine-readable medium including instructions that, when executed by processing circuitry, cause the processing circuitry to perform operations to implement of any of Examples 1-21.
Example 23 is an apparatus comprising means to implement of any of Examples 1-21.
Example 24 is a system to implement of any of Examples 1-21.
Example 25 is a method to implement of any of Examples 1-21.
The above detailed description includes references to the accompanying drawings, which form a part of the detailed description. The drawings show, by way of illustration, specific embodiments in which the invention can be practiced. These embodiments are also referred to herein as “examples.” Such examples can include elements in addition to those shown or described. However, the present inventors also contemplate examples in which only those elements shown or described are provided. Moreover, the present inventors also contemplate examples using any combination or permutation of those elements shown or described (or one or more aspects thereof), either with respect to a particular example (or one or more aspects thereof), or with respect to other examples (or one or more aspects thereof) shown or described herein.
This application is a continuation of U.S. patent application Ser. No. 16/949,505, filed Oct. 30, 2020, which is incorporated by reference herein in its entirety.
| Number | Date | Country | |
|---|---|---|---|
| Parent | 16949505 | Oct 2020 | US |
| Child | 18677185 | US |
