Transient cutting chip capturing device and method for cutting machining

Abstract

The device comprises a machining pushing assembly, a clamping assembly and a guiding assembly, the machining pushing assembly comprises a cut-off tool and a pushing piece, the pushing piece is fixedly connected with the cut-off tool through a connecting piece, the guiding assembly comprises a sliding rail and a cover plate, a U-shaped hole is formed in the cover plate, an opening of the U-shaped hole faces the pushing piece, and the clamping assembly is fixedly connected with the sliding rail. The cover plate is connected with the sliding rail through a guide bolt at the position of the U-shaped hole, the cover plate is connected with the clamping assembly through a connecting element, the clamping assembly is detachably connected with the sliding rail through a fixing piece, and the cover plate is provided with a concave area matched with a pushing head of the pushing piece. Compared with the prior art, the chip form in the laser-assisted machining process can be captured, the surface integrity of the machined surface and the unmachined surface is guaranteed, and the chip form capturing device can be used for research and explanation of the laser-assisted machining mechanism.

Description

Technical Field

[0001] The present invention relates to the technical field of laser-assisted machining, and in particular to a device and method for capturing transient chips during cutting. Background Art

[0002] The excess material removed during the cutting process is called chips. Chip formation is a complex process. The chip formation mechanism is different under different conditions, so the chips will present different forms. Through a large number of experiments and theoretical analysis, people generally believe that there are three regions of material deformation during tool cutting. It can be inferred that during laser-assisted processing, the deformation of the material is similar to that without laser assistance.

[0003] However, there is no direct evidence to show how the material deforms during laser-assisted processing. The chip generation process, instantaneous shape of the chips, and the organizational composition of the chips during the existing laser-assisted processing have not been actually detected. Usually, the chips obtained after the processing are separated from the workpiece, and the instantaneous shape of the chips and the overall shape of the workpiece cannot be explained. Therefore, the existing technology lacks a device that can clearly observe the state of the material during laser-assisted processing. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and to provide a cutting processing transient chip capture device and method which can capture the chips in the instantaneous shape during cutting processing.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] According to one aspect of the present invention, there is provided a cutting processing transient chip capture device, comprising a processing pushing assembly, a clamping assembly and a guiding assembly, the processing pushing assembly comprising a cutting knife and a pushing member, the pushing member being fixedly connected to the cutting knife via a connecting member, the guiding assembly comprising a slide rail and a cover plate, a U-shaped hole being provided on the cover plate, the U-shaped hole opening being facing the pushing member, the cover plate being connected to the slide rail via a guiding bolt at the U-shaped hole, the cover plate being connected to the clamping assembly via a connecting element, the clamping assembly being detachably connected to the slide rail via a fixing member, and the cover plate being provided with a recessed area cooperating with a pushing head of the pushing member.

[0007] Furthermore, a single-sided through groove is provided at the top of the slide rail, the end of the groove faces the side away from the pushing head of the pushing member, and the bottom end of the clamping component cooperates with the groove at the top of the slide rail.

[0008] Furthermore, the clamping assembly includes a base and a pressing block, the pressing block is a long strip member with a rectangular cross section, the base is a long strip member with an L-shaped cross section, and the base and the pressing block are connected by a clamping member to clamp the workpiece.

[0009] Furthermore, the clamping member between the base and the pressing block is a bolt, including a first clamping member and a second clamping member, and is located at both ends of the pressing block.

[0010] Furthermore, the fixing member connecting the clamping assembly and the slide rail includes a first fixing member and a second fixing member, and the connection point is located at two ends of the base.

[0011] Furthermore, the bottom surface of the slide rail is a plane, and the slide rail is located on the machine tool.

[0012] Furthermore, the guide bolts connecting the cover plate and the slide rail include a first guide bolt and a second guide bolt, and the U-shaped holes at the connection are located at both ends of the cover plate.

[0013] Furthermore, the connecting piece, the fixing piece and the connecting element are all bolts.

[0014] Furthermore, the connection point where the slide rail and the cover plate are bolted is a threaded hole, the connection point where the slide rail and the clamping assembly are bolted is a threaded hole, and the connection point where the clamping assembly and the cover plate are bolted is a threaded hole.

[0015] According to another aspect of the present invention, a method for capturing transient chips in cutting is provided, comprising the following steps:

[0016] The workpiece is fixedly clamped on the clamping assembly, and the clamping assembly is fixed on the slide rail through a fixing member, and the slide rail is fixed on the machine tool;

[0017] Use a cutting knife to calibrate the workpiece, and after calibrating, press the cover plate onto the clamping assembly through the connecting piece;

[0018] The cover plate and the clamping assembly are connected and fixed by the connecting piece, and the fixing piece between the clamping assembly and the slide rail is removed to release the connection and fixation between the clamping assembly and the slide rail;

[0019] Adjust the cutting depth and cut with the cutter until the pusher contacts and pushes the cover plate, so that the cover plate, the clamping assembly and the workpiece move along the slide rail;

[0020] The cover plate, clamping assembly and workpiece are allowed to leave the slide rail and fall onto the machine tool, and the cutter and workpiece are separated from contact.

[0021] 1. Compared with the prior art, the present invention is designed with a pusher fixed on the cutting knife, a slide rail with a groove and a cover plate structure that can drive the workpiece to slide along the groove on the slide rail under the push of the pusher. The connection between the cover plate and the slide rail is a U-shaped hole with an opening facing the pusher. The cover plate can move in the opposite direction of the U-shaped hole opening while maintaining the vertical constraint. Therefore, after the pusher collides with the cover plate, the cover plate slides along the slide rail with the clamping device and falls onto the machine tool, thereby completing the separation of the tool and the material. The relative stillness between the tool head and the workpiece during cutting is achieved during sliding. When the workpiece falls into the machine tool after separating from the slide rail with the clamping assembly and the cover plate, the workpiece and chips that ensure the surface integrity of the chips, processed surfaces and unprocessed surfaces during laser-assisted processing can be obtained, which has a great effect on the research and interpretation of the mechanism of laser-assisted processing.

[0022] 2. By fixing the clamping assembly on the slide rail, the cutting depth during the emergency stop process can be guaranteed by tool setting before transient capture.

[0023] 3. The present invention can be used for both laser-assisted machining and conventional cutting, and experimental control can be performed to further illustrate the mechanism of laser-assisted machining. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is the overall schematic diagram of the instantaneous shape capturing device during the cutting process;

[0025] Figure 2 An exploded diagram of the device for capturing the instantaneous shape of the cutting process;

[0026] Figure 3 It is a schematic diagram of the processing and pushing component of the device for capturing the instantaneous shape during the cutting process;

[0027] Figure 4 It is a schematic diagram of the clamping assembly of the device for capturing the instantaneous shape during the cutting process;

[0028] Figure 5 Schematic diagram of the guide assembly of the instantaneous shape capture device during the cutting process.

[0029] In the figure, 1. processing push component, 11. cutting knife, 12. connecting part, 13. pushing part, 2. clamping component, 21. base, 22. pressure block, 23. first fixing part, 24. first clamping part, 25. second clamping part, 26. second fixing part, 3. guide component, 31. slide rail, 32. cover plate, 33. first guide bolt, 34. second guide bolt, 35. threaded hole. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0031] The present invention provides a laser-assisted processing transient chip capture device, which keeps the tool and the material relatively still at a certain moment when the material is processed by laser to generate chips, thereby preserving the transient state, so as to facilitate subsequent research on the transient state of the material during the laser-assisted processing process.

[0032] like Figure 1-Figure 5 As shown, the device includes a processing and pushing component 1, a clamping component 2 and a guiding component 3. The processing and pushing component 1 includes a cutting knife 11, a connecting member 12 and a pushing member 13. The clamping component 2 includes a base 21, a pressure block 22, a first fixing member 23, a first clamping member 24, a second clamping member 25 and a second fixing frame 26. The guiding component 3 includes a slide rail 31, a dry mixer 32, a first guide bolt 33 and a second guide bolt 35.

[0033] The cutting blade 11 can be installed on a milling machine to process the material to be processed. In this embodiment, the cutting blade 11 is a laser processing blade head.

[0034] The push member 13 is fixed to the cutting blade 11 through the connecting member 12. The push member 13 is provided with a push head, which is used to push the cover plate 32 when catching the chips, thereby making the workpiece and the cutting blade 11 relatively static. The connection between the push member 13 and the cutting blade 11 is a threaded connection, and the specific connection form is not limited.

[0035] The cover plate 32 is located above the slide rail 31, and has U-shaped holes on both sides with openings facing the pusher 13, which are used for bolt connection with the slide rail 31. The middle of the cover plate 32 has a recessed area for matching with the pusher head of the pusher 13. The center of the cover plate 32 has a through hole for the bolt to pass through and connect with the clamping assembly 2.

[0036] The clamping assembly 2 includes a base 21 and a pressure block 22. The pressure block is a long strip member with a rectangular cross section. The base 21 is a long strip member with an L-shaped cross section. The L-shaped protrusion of the base 21 is used to match the shape of the pressure block 22. The base 21 and the pressure block 22 are connected by a first clamping member 24 and a second clamping member 25 through bolts, and the workpiece is clamped in the middle. Threaded holes are provided at both ends of the base 21 for bolt connection between the clamping assembly 2 and the slide rail 31 through the first fixing member 23 and the second fixing member 26. A threaded hole is provided above the base 21 for bolt connection between the clamping assembly 2 and the cover plate 3 through a connecting element.

[0037] The slide rail 31 is in the shape of a flat square platform, with a flat bottom and a single-side through groove on the top. The end of the groove faces the side away from the push head of the push member 13. The cross-sectional shape of the groove matches the bottom end of the base 21, allowing the clamping assembly 2 to slide in the groove along the opening direction of the groove. A threaded hole 35 is provided on the top of the slide rail 31, which is used for bolt connection with the clamping assembly 2 through the first fixing member 23 and the second fixing member 26; a threaded hole is provided on each side of the slide rail 31, which is used for bolt connection with the cover plate 32 through the first guide bolt 33 and the second guide bolt 34.

[0038] In this embodiment, since a single-sided through groove is provided on the top of the slide rail 31, the two connections between the slide rail 31 and the clamping assembly 2 are located at the two ends of the axis of the groove on the slide rail 31 and are located at different planes at different heights, which are the top surface of the slide rail 31 and the bottom surface of the groove, respectively. The two connections between the base 2 and the slide rail 31 are matched in height with the corresponding positions of the slide rail 31.

[0039] As a preferred embodiment, the first fixing member 23 and the second fixing member 26 connecting the clamping assembly 2 and the slide rail 31 are M3 bolts, and the first guide bolt 33 and the second guide bolt 34 connecting the cover plate 32 and the slide rail 31 are M12 bolts.

[0040] When capturing chips, first fix the clamping assembly 2 and the workpiece on the slide rail 31 by M3 bolts, and press the slide rail 31 to a certain position of the machine tool by the pressure plate, and then perform tool setting. After tool setting is completed, press the cover plate 32 on the clamping assembly 2 by two M12 bolts, and let one bolt pass through the bolt hole above the cover plate 32 and the clamping assembly 2 to fix the two. At this time, remove the M3 bolts that fix the clamping assembly 2 and the slide rail 32, so that the clamping assembly 2 and the slide rail 32 can move relative to each other along the groove direction. After adjusting the cutting depth, cutting is performed. Since the connection between the cover plate 32 and the slide rail 31 is a U-shaped hole with an opening facing the push assembly 1, the cover plate 32 can move in the opposite direction of the U-shaped hole opening while the M12 bolt remains screwed in. Therefore, after the push assembly 1 collides with the cover plate 32, the cover plate 32 slides along the slide rail 31 with the clamping assembly 2 and falls onto the machine tool, thereby completing the separation of the tool and the material. During sliding, the workpiece and the cutting blade 11 are relatively still, so that the generation of chips and the instantaneous shape of the chips are guaranteed after the processing is completed.

[0041] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A cutting process transient chip capture device, characterized in that: The invention comprises a processing push assembly (1), a clamping assembly (2) and a guide assembly (3), wherein the processing push assembly (1) comprises a cutting knife (11) and a push member (13), wherein the push member (13) is fixedly connected to the cutting knife (11) via a connecting member (12), wherein the guide assembly (3) comprises a slide rail (31) and a cover plate (32), wherein a U-shaped hole is provided on the cover plate (32), wherein the opening of the U-shaped hole faces the push member (13), wherein the cover plate (32) is connected to the slide rail (31) via a guide bolt at the U-shaped hole, wherein the cover plate (32) is connected to the clamping assembly (2) via a connecting element, wherein the clamping assembly (2) is detachably connected to the slide rail (31) via a fixing member, and wherein the cover plate (32) is provided with a recessed area matched with a push head of the push member (13).

2. A cutting processing transient chip capture device according to claim 1, characterized in that: The top of the slide rail (31) is provided with a groove that penetrates on one side, the end of the groove faces the side away from the pushing head of the pushing member (13), and the bottom end of the clamping assembly (2) cooperates with the groove at the top of the slide rail (31).

3. The cutting processing transient chip capture device according to claim 1, characterized in that: The clamping assembly (2) comprises a base (21) and a pressing block (22); the pressing block (22) is a long strip member with a rectangular cross section, and the base (21) is a long strip member with an L-shaped cross section; the base (21) and the pressing block (22) are connected via a clamping member and clamp a workpiece.

4. A cutting processing transient chip capture device according to claim 3, characterized in that: The clamping member between the base (21) and the pressing block (22) is a bolt, comprising a first clamping member (24) and a second clamping member (25), and is located at both ends of the pressing block (22).

5. The cutting processing transient chip capture device according to claim 3, characterized in that: The fixing member comprises a first fixing member (23) and a second fixing member (26), and the connection points between the clamping assembly (2) and the slide rail (31) are located at two ends of the base (21).

6. The cutting processing transient chip capture device according to claim 1, characterized in that: The bottom surface of the slide rail (31) is a plane, and the slide rail (31) is located on a machine tool.

7. The cutting processing transient chip capture device according to claim 1, characterized in that: The guide bolts include a first guide bolt (33) and a second guide bolt (34), and the number of the U-shaped holes is two and they are located at both ends of the cover plate (32).

8. A cutting processing transient chip capture device according to any one of claims 1 to 7, characterized in that: The connecting piece (12), the fixing piece and the connecting element are all bolts.

9. A cutting machining transient chip capture device according to claim 8, characterized in that: The connection point where the slide rail (31) and the cover plate (32) are bolted is a threaded hole, the connection point where the slide rail (31) and the clamping assembly (2) are bolted is a threaded hole (35), and the connection point where the clamping assembly (2) and the cover plate (32) are bolted is a threaded hole.

10. A method for capturing transient chips in cutting processing based on the device according to any one of claims 1 to 9, characterized in that: The following steps are involved: The workpiece is fixedly clamped on the clamping assembly (2), and the clamping assembly (2) is fixed on the slide rail (31) through a fixing member, and the slide rail (31) is fixed on the machine tool; Using a cutting knife (11) to calibrate the workpiece, after which the cover plate (32) is pressed onto the clamping assembly (2) via a connecting piece; The cover plate (32) and the clamping assembly (2) are connected and fixed by means of a connecting piece, and the fixing piece between the clamping assembly (2) and the slide rail (31) is removed to release the connection and fixation between the clamping assembly (2) and the slide rail (31); The cutting depth is adjusted and the cutting knife (11) is used for cutting until the pushing member (13) contacts and pushes the cover plate (32), so that the cover plate (32) together with the clamping assembly (2) and the workpiece moves along the slide rail (31); The cover plate (32), the clamping assembly (2) and the workpiece are allowed to leave the slide rail and fall onto the machine tool, and the cutting knife (11) is out of contact with the workpiece.

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