High-precision twist correcting machine

Abstract

A high-precision twist correcting machine comprises a support, a swing arm, a driving part and a detection unit. A base is arranged on the bracket; the swing arm is rotatably mounted on the base, and a clamping piece used for clamping a workpiece is arranged on the swing arm; the driving part is mounted on the bracket and is in driving connection with the swing arm to drive the swing arm to rotate; the detection unit is mounted on the base and corresponds to the swing arm, and the detection unit is used for detecting the rotation angle of the swing arm and feeding back the rotation angle to the driving part, so that the driving part controls the rotation angle of the swing arm; compared with the prior art, according to the technical scheme, the correction offset can be reduced, and the correction precision of the workpiece is improved.

Description

Technical Field

[0001] This utility model belongs to the field of torsion calibration machine technology, and in particular relates to a high-precision torsion calibration machine. Background Technology

[0002] Steel pipes, steel plates, steel columns, and other workpieces may undergo bending deformation during production and processing. Therefore, existing technologies typically use torsion straightening machines to straighten the workpieces. For example, invention patent application number 2015100070403 mentions a torsion straightening fixture, according to its specification paragraph 0015 and appendix... Figure 1 It can be seen that the straightening fixture mainly includes a positioning seat, a swing arm, and a hydraulic cylinder. The positioning seat and the swing arm are used to clamp and fix the workpiece, while the hydraulic cylinder is used to drive the swing arm to rotate, thereby playing the role of straightening the workpiece by twisting. The operation is relatively convenient.

[0003] However, in actual use, it was found that due to the lack of a corresponding mechanism to accurately control the extension and retraction stroke of the hydraulic cylinder, the swing angle of the swing arm was difficult to control, resulting in a large correction offset. The workpiece often failed to meet subsequent processing requirements due to the low correction accuracy. Therefore, it is urgent to design a high-precision torsion correction machine to solve this problem. Utility Model Content

[0004] Technical problems to be solved

[0005] This invention provides a high-precision torsion calibration machine that can reduce calibration offset and improve the calibration accuracy of the workpiece.

[0006] Technical solution

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A high-precision torsion straightening machine includes a support, a swing arm, a drive unit, and a detection unit. The support has a base. The swing arm is rotatably mounted on the base and has clamps for holding workpieces. The drive unit is mounted on the support and drivenly connected to the swing arm to drive its rotation. The detection unit is mounted on the base and corresponds to the swing arm, and is used to detect the rotation angle of the swing arm and feed it back to the drive unit, so that the drive unit can control the rotation angle of the swing arm.

[0009] Preferably, the device further includes a positioning arm, which is fixedly mounted on the base and located on the opposite side of the swing arm. The positioning arm is also provided with the clamping member, and the clamping member on the swing arm and the clamping member on the positioning arm can clamp the workpiece simultaneously.

[0010] Preferably, the swing arms are provided in two and symmetrically arranged on both sides of the base, and the clamps on the two swing arms can clamp the workpiece synchronously; the driving unit is provided in two and is respectively driven connected to the two swing arms; the detection unit is provided in two sets and is respectively electrically connected to the two driving units, and the two sets of detection units are respectively used to detect the rotation angle of the two swing arms.

[0011] Preferably, the clamping component includes a slide block, a top block, a bottom block, a push block, and a cylinder; the slide block is fixedly mounted on the swing arm, and a sliding cavity is provided inside the slide block; the top block is slidably mounted on the sliding cavity, and a first inclined surface is provided on the top block; the bottom block is fixedly mounted on the swing arm and corresponds to the top block; the push block is slidably mounted on the slide block and can enter and exit the sliding cavity, and a second inclined surface is provided on the push block; the cylinder is mounted on the swing arm and drivenly connected to the push block to drive the push block into and out of the sliding cavity, such that the second inclined surface of the push block presses against or releases the first inclined surface of the top block, and when the second inclined surface presses against the first inclined surface, the top block moves closer to the bottom block to clamp the workpiece.

[0012] Preferably, the clamp further includes a spring, the slide block is provided with a stop block at the top of the slide cavity, the top block is provided with a sliding post that slides through the stop block, and a stop plate is installed on the through end of the sliding post, and the push block is provided with a relief groove that is offset from the sliding post; the spring abuts against the stop plate and the stop block, and when the second inclined surface presses against the first inclined surface, the elastic element deforms and stores energy.

[0013] Preferably, the bracket is provided with a support seat, and the driving part includes a mounting block and a hydraulic cylinder; the mounting block is rotatably connected to the support seat, the hydraulic cylinder is fixedly mounted on the mounting block and signal-connected to the detection unit, and the piston rod of the hydraulic cylinder is hinged to the swing arm, and the swing arm is driven to rotate by controlling the extension and retraction of the piston rod of the hydraulic cylinder.

[0014] Preferably, the detection unit includes an encoder and a driven gear. The swing arm is provided with a rotating block, which is rotatably connected to the base. The end of the rotating block extends into the base and is fitted with a gear plate. The encoder is installed inside the base and is electrically connected to the drive unit. The driven gear is installed on the input shaft of the encoder and meshes with the gear plate to collect the rotation angle information of the gear plate.

[0015] Preferably, the detection unit further includes photoelectric switches and sensing plates. Multiple photoelectric switches are arranged in parallel array and installed inside the base, and all of the multiple photoelectric switches are electrically connected to the driving unit. The sensing plates are installed on the gear plate, and the sensing plates can align with any of the photoelectric switches one by one as the gear plate rotates.

[0016] Preferably, it further includes a machine base and a translation unit, wherein the bracket is movably mounted on the machine base, and the translation unit is mounted on the machine base and drivenly connected to the bracket to drive the bracket to translate.

[0017] Preferably, the translation unit includes a servo motor, a drive gear, and a rack. The rack is mounted on the bracket and moves in the same direction as the bracket. The servo motor is mounted on the machine base, and the drive gear is mounted on the output shaft of the servo motor and meshes with the rack.

[0018] (III) Beneficial Effects

[0019] This utility model provides a high-precision torsion correction machine. By designing a clamp on the swing arm for holding the workpiece, and designing a drive unit on the bracket for driving the swing arm to rotate to correct the workpiece, a detection unit is designed to detect the rotation angle of the swing arm and feed it back to the drive unit, so that the swing arm stops after rotating at a suitable angle, avoiding the workpiece deformation being too small or too large, thereby effectively reducing the correction offset and improving the correction accuracy of the workpiece. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0021] Figure 1 A schematic diagram of the overall structure of this utility model is shown;

[0022] Figure 2 It shows Figure 1 A schematic diagram of the decomposition process;

[0023] Figure 3 An exploded view of part of the structure of this utility model is shown;

[0024] Figure 4 A partial structural schematic diagram of this utility model is shown. Figure 1 ;

[0025] Figure 5 A partial structural schematic diagram of this utility model is shown. Figure 2 ;

[0026] Figure 6 It shows Figure 5 The main view;

[0027] Figure 7 It shows Figure 6 AA section view;

[0028] Figure 8 It shows Figure 5 The right view;

[0029] Figure 9 It shows Figure 8 BB cross-sectional view;

[0030] Figure 10 An exploded view of the clamping component of this utility model is shown;

[0031] Figure 11 An exploded view of the base and detection unit of this utility model is shown;

[0032] Figure 12 A schematic diagram of the structure of the base and detection unit of this utility model is shown;

[0033] Figure 13 A schematic diagram of the overall structure of another embodiment of the present invention is shown. Figure 1 ;

[0034] Figure 14 A schematic diagram of the overall structure of another embodiment of the present invention is shown. Figure 2 .

[0035] In the diagram: 1 bracket, 11 base, 12 support seat, 2 swing arm, 21 rotating block, 22 gear plate, 3 clamping piece, 31 slide block, 310 sliding cavity, 32 top block, 320 first inclined plane, 321 sliding column, 322 abutment plate, 33 bottom block, 34 push block, 340 second inclined plane, 341 clearance groove, 35 cylinder, 36 spring, 37 abutment block, 4 drive unit, 41 mounting block, 42 ​​oil cylinder, 5 detection unit, 51 encoder, 52 driven gear, 53 photoelectric switch, 54 sensing plate, 6 positioning arm, 7 machine base, 8 translation unit, 81 servo motor, 82 drive gear, 83 rack, P workpiece. Detailed Implementation

[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this application. It is understood that the accompanying drawings are provided for reference and illustration only, and are not intended to limit this application. The connection relationships shown in the accompanying drawings are only for clear description and do not limit the connection method.

[0037] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component, or there may be an intervening component. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It should also be noted that, unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; as a mechanical connection or an electrical connection; or as a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application.

[0038] See appendix Figure 1 -Appendix Figure 12 A high-precision torsion straightening machine includes a support 1, a swing arm 2, a drive unit 4, and a detection unit 5. The support 1 is provided with a base 11. The swing arm 2 is rotatably mounted on the base 11, and the swing arm 2 is provided with a clamp 3 for clamping a workpiece P. The drive unit 4 is mounted on the support 1 and drivenly connected to the swing arm 2 to drive the swing arm 2 to rotate. The detection unit 5 is mounted on the base 11 and corresponds to the swing arm 2. The detection unit 5 is used to detect the rotation angle of the swing arm 2 and feed it back to the drive unit 4 so that the drive unit 4 can control the rotation angle of the swing arm 2.

[0039] Specifically, in use, first measure the required correction amount of workpiece P and fix one end of workpiece P, then clamp the part of workpiece P to be corrected by clamping member 3, then start the drive unit 4 to drive the swing arm 2 to rotate, which can cause the workpiece P to undergo slight deformation to perform the correction operation. During the correction process, the detection unit 5 detects the rotation angle of the swing arm 2 and synchronously feeds it back to the drive unit 4. When the rotation angle detected by the detection unit 5 is consistent with the required correction amount of workpiece P, the detection unit 5 sends a shut-off signal to the drive unit 4, so that the swing arm 2 stops rotating.

[0040] In summary, this utility model designs a clamping member 3 on the swing arm 2 to hold the workpiece P, designs a driving unit 4 on the bracket 1 to drive the swing arm 2 to rotate in order to correct the workpiece P, and designs a detection unit 5 to detect the rotation angle of the swing arm 2 and feed it back to the driving unit 4, so that the swing arm 2 stops after rotating at a suitable angle, avoiding the workpiece P from being too small or too large in deformation, thereby effectively reducing the correction offset and improving the correction accuracy of the workpiece P.

[0041] See appendix Figure 11 -Appendix Figure 12There are various ways to fix the workpiece P. For example, the workpiece P can be directly fixed at the work station after processing, or it can be removed and fixed on the bracket 1 for use. This utility model does not limit this. For ease of understanding, this utility model also includes a positioning arm 6. The positioning arm 6 is fixedly installed on the base 11 and located on the opposite side of the swing arm 2. The positioning arm 6 is also provided with a clamp 3. The clamp 3 on the swing arm 2 and the clamp 3 on the positioning arm 6 can clamp the workpiece P at the same time.

[0042] Specifically, in use, first measure the required correction amount of workpiece P, then clamp and fix one end of workpiece P by clamping the clamp 3 on the positioning arm 6, clamp the part of workpiece P to be corrected by clamping the clamp 3, then start the drive unit 4 to drive the swing arm 2 to rotate, which can drive workpiece P to undergo slight deformation and perform correction operation.

[0043] See appendix Figure 1 -Appendix Figure 12 In order to further improve work efficiency, in this utility model, there are two swing arms 2 symmetrically arranged on both sides of the base 11, and the clamps 3 on the two swing arms 2 can clamp the workpiece P simultaneously; there are two drive units 4 and they are respectively connected to the two swing arms 2; there are two detection units 5 and they are respectively electrically connected to the two drive units 4, and the two detection units 5 are respectively used to detect the rotation angle of the two swing arms 2.

[0044] Specifically, in use, the required correction amount for workpiece P is first measured, and then workpiece P is synchronously clamped by the clamps 3 on the two swing arms 2. Next, the two drive units 4 are activated to control the two swing arms 2 to rotate synchronously in opposite directions, so that two opposing forces can be applied to workpiece P at the same time, allowing workpiece P to deform quickly and shortening the actual correction time. During the correction process, the two sets of detection units 5 will detect the rotation angle of the two swing arms 2 respectively and synchronously feed it back to the two drive units 4. When the total value of the rotation angle of the two swing arms 2 is equal to the required correction amount for workpiece P, the two sets of detection units 5 will simultaneously send a shut-off signal to the two drive units 4, so that the two swing arms 2 stop rotating.

[0045] On the other hand, in actual use, one of the swing arms 2 can also be used directly as the positioning arm 6, that is, one swing arm 2 is fixed relative to the base 11, and the other swing arm 2 can rotate independently relative to the base 11; since there are many specific ways of use, this utility model does not limit this.

[0046] See appendix Figure 4 -Appendix Figure 10The clamping component 3 can be a parallel gripper cylinder 35, an electric clamp, or other structure with clamping function. Since there are various types of related structures, and most are conventional mechanical structures, this utility model does not impose any restrictions on them. For ease of understanding, in this utility model, the clamping component 3 includes a slide block 31, a top block 32, a bottom block 33, a push block 34, and a cylinder 35. The slide block 31 is fixedly mounted on the swing arm 2, and a sliding cavity 310 is provided inside the slide block 31. The top block 32 is slidably mounted at the sliding cavity 310, and a first inclined surface is provided on the top block 32. 320; The bottom block 33 is fixedly installed on the swing arm 2 and corresponds to the top block 32; The push block 34 is slidably installed on the slide block 31 and can enter and exit the slide cavity 310, and the push block 34 is provided with a second inclined surface 340; The cylinder 35 is installed on the swing arm 2 and drivenly connected to the push block 34 to drive the push block 34 to enter and exit the slide cavity 310, so that the second inclined surface 340 of the push block 34 presses or releases the first inclined surface 320 of the top block 32. When the second inclined surface 340 presses the first inclined surface 320, the top block 32 moves closer to the bottom block 33 to clamp the workpiece P.

[0047] Specifically, under normal circumstances, when the push block 34 moves away from the slide cavity 310, the second inclined surface 340 releases the first inclined surface 320. At this time, the top block 32 can move normally along the slide cavity 310 to change the distance between it and the bottom block 33, which facilitates the placement of workpieces P with different thicknesses. When the workpiece P is placed on the bottom block 33, the cylinder 35 is activated to drive the push block 34 closer to the slide cavity 310, so that the second inclined surface 340 gradually presses against the first inclined surface 320. During this process, the top block 32 is pressed down by the push block 34 and moves closer to the bottom block 33 to clamp the workpiece P. Similarly, after the workpiece P is corrected, the cylinder 35 is activated to drive the push block 34 away from the slide cavity 310 and release the top block 32, so that the workpiece P can be removed smoothly.

[0048] It should be noted that cylinder 35 can also be replaced by components with linear travel stroke, such as lead screw motor or hydraulic cylinder 42, and this utility model does not impose any restrictions on this.

[0049] See appendix Figure 4 -Appendix Figure 10 In this utility model, the clamp 3 also includes a spring 36, the slide block 31 is provided with a stop block 37 at the top of the slide cavity 310, the top block 32 is provided with a sliding post 321 that slides through the stop block 37, and a stop plate 322 is installed on the through end of the sliding post 321, and the push block 34 is provided with a relief groove 341 that is offset from the sliding post 321; the spring 36 abuts against the stop plate 322 and the stop block 37.

[0050] Specifically, when the push block 34 presses against the top block 32, causing the second inclined surface 340 to press against the first inclined surface 320, the elastic element deforms and stores energy. When the push block 34 disengages from the top block 32, the elastic element releases energy and recovers, thereby driving the top block 32 to move upward and reset, thus releasing the clamped workpiece P. Therefore, the combined use of the spring 36, the abutment block 37, and the abutment plate 322 enables the top block 32 to have an automatic reset function, which can improve the ease of operation. The design of the clearance groove 341 is to prevent the sliding column 321 from obstructing the movement of the push block 34. In addition, the clearance groove 341 can also slide with the sliding column 321 to further improve the structural stability.

[0051] See appendix Figure 1 -Appendix Figure 4 The drive unit 4 used to drive the swing arm 2 to rotate around a specific position has a variety of structures and is very common in the mechanical field. Therefore, the specific structure of the drive unit 4 is not limited in this utility model. For ease of understanding, in this embodiment, the bracket 1 is provided with a support seat 12, and the drive unit 4 includes a mounting block 41 and a hydraulic cylinder 42. The mounting block 41 is rotatably connected to the support seat 12, the hydraulic cylinder 42 is fixedly mounted on the mounting block 41 and is signal-connected to the detection unit 5, and the piston rod of the hydraulic cylinder 42 is hinged to the swing arm 2.

[0052] Specifically, when the starting cylinder 42 extends the piston rod, the mounting block 41 rotates around the support base 12 in the positive direction, and the swing arm 2 also gradually rotates around the positive direction as the piston rod extends. Similarly, when the starting cylinder 42 shortens the piston rod, the mounting block 41 rotates around the support base 12 in the opposite direction, and the swing arm 2 also gradually rotates around the opposite direction as the piston rod contracts. By controlling the extension and retraction of the piston rod of the cylinder 42 to adjust the rotation angle of the swing arm 2, the workpiece P is twisted and fine-tuned to achieve the correction work.

[0053] It should be noted that the hydraulic cylinder 42 can also be replaced by a lead screw motor, a pneumatic cylinder 35, a liquid cylinder, or other components with linear travel stroke, and this utility model does not impose any restrictions on this.

[0054] See appendix Figure 1 -Appendix Figure 4 and attached Figure 11 -Appendix Figure 12 The detection unit 5 includes an encoder 51 and a driven gear 52. The swing arm 2 is provided with a rotating block 21, which is rotatably connected to the base 11. The end of the rotating block 21 extends into the base 11 and is equipped with a gear plate 22. The encoder 51 is installed inside the base 11 and is electrically connected to the drive unit 4. The driven gear 52 is installed on the input shaft of the encoder 51 and meshes with the gear plate 22.

[0055] Specifically, during the rotation of the swing arm 2, the rotating block 21 and the gear disk 22 will be driven synchronously. The gear disk 22 will drive the driven gear 52 to rotate slightly through the teeth. The encoder 51 will collect the rotation angle information of the gear disk 22 and feed it back to the drive unit 4, thereby controlling the operation state of the drive unit 4 and accurately controlling the swing angle of the swing arm 2.

[0056] It should be noted that, in addition to the above-mentioned structure, the detection unit 5 may also use components with detection functions such as a visual inspection mechanism or an infrared sensing mechanism, and this utility model does not impose any restrictions on this.

[0057] See appendix Figure 1 -Appendix Figure 4 and attached Figure 11 -Appendix Figure 12 The detection unit 5 also includes a photoelectric switch 53 and a sensing plate 54. The photoelectric switch 53 is provided with multiple photoelectric switches arranged in parallel array inside the base 11, and all photoelectric switches 53 are electrically connected to the drive unit 4. The sensing plate 54 is mounted on the toothed disc 22, and the sensing plate 54 can align with any photoelectric switch 53 one by one as the toothed disc 22 rotates.

[0058] Specifically, for ease of understanding, three photoelectric switches 53 can be preset, namely the first photoelectric switch, the second photoelectric switch, and the third photoelectric switch. The first photoelectric switch corresponds to the initial position of the swing arm 2, the third photoelectric switch corresponds to the final position of the swing arm 2 after rotation, and the second photoelectric switch is located between the first and third photoelectric switches. When the sensing plate 54 aligns with the first or third photoelectric switch, the first or third photoelectric switch sends a stop signal to the drive unit 4, causing the swing arm 2 to stop swinging and avoid excessive rotation of the swing arm 2 and collision. When the sensing plate 54 aligns with the second photoelectric switch, it indicates that the calibration work is being carried out normally, and the second photoelectric switch sends a running signal to the drive unit 4.

[0059] It should be noted that the cooperative use of the sensing element 54 and the multiple photoelectric switches 53, and the implementation of specific functions through the cooperation of the sensing element 54 and the multiple photoelectric switches 53, is quite conventional in the mechanical field. Therefore, the specific circuit structure and working principle of this utility model will not be further elaborated.

[0060] See appendix Figure 1 -Appendix Figure 2 The present invention also includes a machine base 7 and a translation part 8. The support 1 is movably mounted on the machine base 7, and the translation part 8 is mounted on the machine base 7 and drivenly connected to the support 1 to drive the support 1 to translate.

[0061] Specifically, after the workpiece P is processed, there may be a situation where it cannot move on its own. In this case, it is necessary to control the movement of the clamping part 3 to clamp the workpiece P. The design of the translation part 8 can drive the support 1 to translate, so that the support 1 moves away from or closer to the workpiece P, further improving the ease of use.

[0062] See appendix Figure 1 -Appendix Figure 2 The translation unit 8 includes a servo motor 81, a drive gear 82, and a rack 83. The rack 83 is mounted on the bracket 1 and moves in the same direction as the bracket 1. The servo motor 81 is mounted on the machine base 7. The drive gear 82 is mounted on the output shaft of the servo motor 81 and meshes with the rack 83.

[0063] Specifically, starting the servo motor 81 drives the drive gear 82 to rotate, which in turn drives the rack 83 to translate in a specific direction, thereby moving the bracket 1.

[0064] It should be noted that, in addition to the above-mentioned structure, the translation part 8 can also adopt other structures with a travel range. The relevant structures are quite diverse and are quite conventional in the mechanical field. Therefore, this utility model does not impose any restrictions on them.

[0065] It should also be noted that, although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application.

Claims

1. A high-precision torsion correction machine, characterized by, The utility model relates to a kind of workpiece clamping device, including: Support (1), base (11) is equipped on the support (1); Swing arm (2), swing arm (2) is rotatably mounted on the base (11), and swing arm (2) is equipped with clamp (3) for clamping workpiece (P); Driving part (4), driving part (4) is installed on the support (1) and is drivenly connected with swing arm (2), to drive swing arm (2) to rotate; Detection unit (5), detection unit (5) is installed on the base (11) and corresponds swing arm (2), and the detection unit (5) is used to detect the rotation angle of swing arm (2) and feedback to driving part (4), to control the rotation angle of swing arm (2) by driving part (4).

2. A high-precision torsion machine according to claim 1, characterized in that Also including positioning arm (6), positioning arm (6) is fixedly installed on the base (11) and is located on the opposite side of swing arm (2), and the positioning arm (6) is also equipped with clamp (3), and the clamp (3) on swing arm (2) and the clamp (3) on positioning arm (6) can simultaneously clamp workpiece (P).

3. The high-precision torsion machine according to claim 1, characterized in that Swing arm (2) is equipped with two and symmetrically arranged on the both sides of base (11), and the clamp (3) on the two swing arms (2) can synchronously clamp workpiece (P);Driving part (4) is equipped with two and is respectively drivenly connected with two swing arms (2);Detection unit (5) is equipped with two groups and is respectively electrically connected with two driving parts (4), and two detection units (5) are respectively used to detect the rotation angle of two swing arms (2).

4. A high-precision torsion machine according to any one of claims 1-3, characterized in that, The clamp (3) includes slide (31), top block (32), bottom block (33), push block (34) and air cylinder (35);The slide (31) is fixedly installed on the swing arm (2), and the slide (31) is equipped with slide cavity (310) in the inside;The top block (32) is slidably installed at slide cavity (310), and the top block (32) is equipped with first inclined surface (320);The bottom block (33) is fixedly installed on the swing arm (2) and corresponds the top block (32);The push block (34) is slidably installed on the slide (31) and can enter and exit the slide cavity (310), and the push block (34) is equipped with second inclined surface (340);The air cylinder (35) is installed on the swing arm (2) and is drivenly connected with the push block (34), to drive the push block (34) to enter and exit the slide cavity (310), so that the second inclined surface (340) of the push block (34) extrudes or loosens the first inclined surface (320) of the top block (32), when the second inclined surface (340) extrudes the first inclined surface (320), the top block (32) is close to the bottom block (33) to clamp workpiece (P).

5. A high-precision torsion machine according to claim 4, characterized in that The clamping piece (3) further comprises a spring (36), the sliding base (31) is provided with a resisting block (37) on the top of the sliding cavity (310), the top block (32) is provided with a sliding column (321) sliding through the resisting block (37), and the penetrating end of the sliding column (321) is provided with a resisting plate (322), and the pushing block (34) is provided with an avoiding groove (341) staggered with the sliding column (321); the spring (36) abuts against the resisting plate (322) and the resisting block (37), and when the second inclined surface (340) extrudes the first inclined surface (320), the spring (36) is deformed to store energy.

6. The high-precision torsion machine according to claim 1, characterized in that The support (1) is provided with a supporting seat (12), and the driving part (4) comprises a mounting block (41) and an oil cylinder (42); the mounting block (41) is rotationally connected with the supporting seat (12), the oil cylinder (42) is fixedly arranged on the mounting block (41) and is signal connected with the detection unit (5), and the piston rod of the oil cylinder (42) is hinged to the swing arm (2), and the swing arm (2) is driven to rotate by controlling the extension and retraction of the piston rod of the oil cylinder (42).

7. The high-precision torsion machine according to claim 1, characterized in that The detection unit (5) comprises an encoder (51) and a driven gear (52), the swing arm (2) is provided with a rotating block (21), the rotating block (21) is rotationally connected with the base (11), and the end of the rotating block (21) extends into the base (11) and is provided with a tooth disc (22); the encoder (51) is arranged in the base (11) and is electrically connected with the driving part (4), and the driven gear (52) is arranged on the input shaft of the encoder (51) and is engaged with the tooth disc (22) to collect the rotation angle information of the tooth disc (22).

8. A high-precision torsion machine according to claim 7, characterized in that The detection unit (5) further comprises a photoelectric switch (53) and an induction sheet (54), the photoelectric switch (53) is provided with a plurality of arrays arranged in the base (11), and the plurality of photoelectric switches (53) are electrically connected with the driving part (4); the induction sheet (54) is arranged on the tooth disc (22), and the induction sheet (54) can be aligned with any one of the photoelectric switches (53) by rotating the tooth disc (22).

9. The high-precision torsion machine according to claim 1, characterized in that Further comprising a machine table (7) and a translation part (8), the support (1) is movably arranged on the machine table (7), and the translation part (8) is arranged on the machine table (7) and is drivingly connected with the support (1) to drive the support (1) to translate.

10. The high-precision torsion machine according to claim 9, characterized in that The translation part (8) comprises a servo motor (81), a driving gear (82) and a rack (83), the rack (83) is arranged on the support (1) and is consistent with the moving direction of the support (1), the servo motor (81) is arranged on the machine table (7), and the driving gear (82) is arranged on the output shaft of the servo motor (81) and is engaged with the rack (83).

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