Micro-forging machining method for thin-wall part with notch and clamp

Abstract

The invention belongs to the technical field of metal surface strengthening, and discloses a micro-forging machining method and clamp for thin-wall parts with notches, and the micro-forging machining method comprises the following steps: step S10, preparation work: a to-be-forged piece is fixed in the clamp according to preset requirements, and the clamp is mounted on a working platform of micro-forging equipment; and S20, micro-forging strengthening is conducted, specifically, along the circumferential preset path of the to-be-forged piece, a forging hammer of the micro-forging equipment hammers the forging face of the to-be-forged piece till micro-forging of all the forging face of the to-be-forged piece is completed. The to-be-forged piece is fixed to the working platform through the clamp, the forging hammer hammers the end face of the to-be-forged piece along the axial preset path of the to-be-forged piece, the machining path is optimized, micro-forging can be conducted on all surfaces and edges of the area, needing micro-forging, of the to-be-forged piece, the edges are strengthened, meanwhile, curled edges or notches caused by deformation of the edges are avoided, and the quality of the to-be-forged piece is improved. The micro-forging success rate and the micro-forging quality of the to-be-forged piece are improved, and small-deformation and high-quality machining of the thin-wall part with the notch through the micro-forging machining method for the thin-wall part with the notch is improved.

Description

Technical Field

[0001] The invention relates to the technical field of metal surface strengthening, in particular to a micro-forging method and a clamp for thin-walled parts with gaps. Background Art

[0002] Microforging is a machining process that uses ordered mechanical impacts on a workpiece surface to improve surface integrity and thus enhance fatigue performance. Compared to existing surface machining technologies, microforging is characterized by the ordered impact of the microforging head on the workpiece surface, which offers greater controllability. Therefore, it is commonly used in the surface treatment of aerospace component structures.

[0003] However, the current micro-forging process generally needs to avoid the edges of thin-walled parts when processing notched thin-walled parts, such as detailed fatigue specimens and blades. Even if the edges are processed, they are likely to cause edge curling or notching during the surface strengthening process, resulting in component processing failure and high scrap rate. In addition, during the micro-forging process, if the impact forces at different positions on the surface are different or there are unimpacted positions, it is also easy to cause plastic deformation of the parts.

[0004] Therefore, there is an urgent need for a micro-forging method and a fixture for thin-walled parts with gaps to solve the above technical problems. Summary of the Invention

[0005] An object of the present invention is to provide a micro-forging method for thin-walled parts with notches, which can optimize the processing path, realize rotary processing, and improve the small deformation and high-quality processing of thin-walled parts with notches.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] Micro-forging methods for thin-walled parts with notches include:

[0008] Step S10, preparation: fix the workpiece to be forged in the fixture according to preset requirements, and install the fixture on the working platform of the micro-forging equipment;

[0009] Step S20, micro-forging strengthening: the forging hammer of the micro-forging equipment hammers the forging surface of the workpiece along a preset circumferential path of the workpiece until all the forging surfaces of the workpiece are micro-forged.

[0010] Optionally, in the step S20, the workpiece to be forged and / or the forging hammer of the micro-forging equipment rotates along the axial direction of the workpiece to be forged, so that the forging hammer of the micro-forging equipment can perform surface micro-forging along the circumference of the workpiece to be forged.

[0011] Optionally, in the step S20, the stroke of the forging hammer of the micro-forging equipment striking the forging surface of the workpiece to be forged increases as the thickness of the workpiece to be forged increases.

[0012] Optionally, in the step S20, the stroke of the hammer of the micro forging equipment when hammering the surface of the workpiece is greater than the stroke of the hammer of the micro forging equipment when hammering the edge of the workpiece.

[0013] Optionally, in the step S20, the hammer of the micro forging equipment and / or the workpiece can be adjusted in angle to make the hammer of the micro forging equipment be perpendicular to the forging surface of the workpiece.

[0014] Optionally, in the step S20, when the hammer of the micro forging equipment hammers the forging surface of the workpiece, the micro forging is performed according to the preset inter-revolution feed speed and the preset inter-revolution step distance.

[0015] Optionally, in the step S10, the manner of fixing the workpiece to the clamp according to the preset requirement comprises: fixing the fixed part of the workpiece to the clamp, and making the work-to-be-forged part of the workpiece extend out of the clamp.

[0016] Another object of the present application is to provide a clamp, which can optimize the machining path, realize rotary machining, and improve the machining of small deformation and high quality of the thin-walled part with a notch.

[0017] To achieve the above object, the present application adopts the following technical scheme:

[0018] The clamp is applied to the micro forging machining method of the thin-walled part with a notch, and the clamp comprises:

[0019] The fixing member is used for cooperating with the working platform of the micro forging equipment;

[0020] The clamp main body comprises a connecting part and a mounting part connected with each other, the connecting part is connected to one end of the fixing member, and the mounting part is used for limiting the fixed part of the workpiece and making the work-to-be-forged part of the workpiece extend out of the mounting part.

[0021] The clamping member is detachably connected to the mounting part along the first direction, so as to fix the fixed part of the workpiece between the mounting part and the clamping member along the first direction.

[0022] Optionally, the mounting part is provided with a mounting groove, the groove walls of the mounting groove are oppositely arranged along the second direction, the mounting groove is used for mounting the workpiece to limit the workpiece along the second direction, the bottom of the mounting groove is provided with a limiting column, the limiting column can be limitedly connected with the workpiece to limit the workpiece along the third direction, and the first direction, the second direction and the third direction are arranged to be perpendicular to each other.

[0023] Optionally, the connecting part is provided with side walls at both ends in the second direction, the connecting part abuts against the main body part of the fixing part in the third direction, and the main body part of the fixing part is clamped in the two side walls to limit the connecting part in the second direction; the fixing part is provided with clamping walls at both ends in the first direction, and the connecting part is clamped in the two clamping walls to limit the connecting part in the first direction.

[0024] The present application has the following advantages:

[0025] The present application provides a micro forging processing method and clamp for a notched thin-walled part, which fixes the workpiece to be forged on the workbench by the clamp, and then the hammer hits the end face of the workpiece to be forged along the preset path in the axial direction of the workpiece to be forged, optimizes the processing path, and can realize micro forging of each surface and edge of the area of the workpiece to be forged, strengthens the edge while avoiding deformation, edge curling or notching, improves the micro forging success rate and quality of the workpiece to be forged, and realizes small deformation and high-quality processing of the notched thin-walled part by the micro forging processing method. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is the isometric view of the clamp provided by the embodiment of the present application;

[0027] Figure 2 is the exploded view of the clamp provided by the embodiment of the present application;

[0028] Figure 3 is the isometric view of the clamp provided by the embodiment of the present application, which is installed with the workpiece to be forged;

[0029] Figure 4 is the work flow chart of the micro forging processing method for the notched thin-walled part provided by the embodiment of the present application;

[0030] Figure 5 is the schematic view of the micro forging area of the workpiece to be forged provided by the embodiment of the present application;

[0031] Figure 6 is the schematic view of the hammer stroke near the edge fillet area of the clamp provided by the embodiment of the present application;

[0032] Figure 7 is the schematic view of the preset inter-revolution feed speed and preset inter-revolution step distance in the planar area of the clamp provided by the embodiment of the present application.

[0033] In the figure:

[0034] 10, fixing part; 11, main body part; 12, clamping wall;

[0035] 20, clamp body; 21, connecting part; 211, first groove; 212, second groove; 22, mounting part; 221, mounting groove; 222, limiting column; 223, limiting block; 224, threaded hole;

[0036] 30, clamping part; 31, fixing hole;

[0037] 200, workpiece; 210, notch; 220, limiting hole; 230, round corner; 300, hammer; 400, machining path. DETAILED DESCRIPTION

[0038] The application will be further described below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the application and are not to be used to limit the application. In addition, it should be noted that only the parts related to the application are shown in the drawings for the convenience of description, rather than all the structures.

[0039] In the description of the application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0040] In the present application, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0041] In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or position relationship is based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the application. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0042] The application will be further described below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the application and are not to be used to limit the application. In addition, it should be noted that only the parts related to the application are shown in the drawings for the convenience of description, rather than all the structures. Figures 1 to 7The micro forging processing method and the clamp for the thin-walled part with a notch provided in the embodiment will be described in detail.

[0043] At present, when the micro forging is performed on the workpiece 200 on the micro forging equipment, the workpiece 200 can only be fixed on the working platform of the micro forging equipment, and the surface is hammered by the forging hammer 300 while avoiding the edge to avoid deformation. However, such processing will cause the deformation or edge curling phenomenon of the thin-walled part with a notch 210.

[0044] The clamp provided in the embodiment is applied to the micro forging processing method for the thin-walled part with a notch in the embodiment, and is used to clamp the workpiece 200 and suspend the work surface of the workpiece 200 to realize the circumferential rotation micro forging of the workpiece 200.

[0045] It should be noted that the workpiece 200 in the embodiment is a thin-walled part with a notch 210, and can also be other structures in other embodiments, which are not limited here.

[0046] In addition, the first direction is the Z direction in Figure 1 , the second direction is the Y direction in Figure 1 , and the third direction is the X direction in Figure 1 . The X direction, the Y direction and the Z direction are perpendicular to each other.

[0047] Please refer to Figures 1 to 3 . Specifically, the clamp includes a fixing piece 10, a clamp body 20 and a clamping piece 30. The fixing piece 10 is used to be connected with the working platform of the micro forging equipment to connect and fix the clamp with the micro forging equipment. The clamp body 20 includes a connecting part 21 and a mounting part 22 connected with each other. The connecting part 21 is limitingly connected to one end of the fixing piece 10. The mounting part 22 is used to limit the installation of the fixed part of the workpiece 200 and make the work surface of the workpiece 200 extend out of the mounting part 22. The clamping piece 30 is detachably connected to the mounting part 22 along the first direction to fix the fixed part of the workpiece 200 between the mounting part 22 and the clamping piece 30 along the first direction.

[0048] The clamp in the embodiment can limit the fixed end of the workpiece 200 to be installed between the mounting part 22 and the clamping piece 30, and install the workpiece 200 and the clamp on the working platform of the micro forging equipment through the fixing piece 10, so as to realize the fixed installation of the fixed part of the workpiece 200, ensure that the work surface of the workpiece 200 extends out of the clamp and keeps in a suspended state, so that the forging hammer 300 can perform circumferential rotation processing on the work surface, ensure uniform micro forging of the workpiece 200, avoid deformation and curling, and improve the processing of the workpiece 200 clamped by the clamp with small deformation and high quality.

[0049] Please refer toFigures 1 to 3 In this embodiment, the mounting portion 22 defines a mounting groove 221, the walls of which are arranged relative to each other along the second direction. The mounting groove 221 is used to mount the workpiece 200 to limit the position of the workpiece 200 in the second direction. A limiting post 222 is provided at the bottom of the mounting groove 221. The limiting post 222 can be connected to the workpiece 200 to limit the position of the workpiece 200 in the third direction. The first direction, the second direction, and the third direction are arranged perpendicular to each other. This arrangement, combined with the clamping member 30 limiting the position of the workpiece 200 in the first direction, can achieve all-round positional fixation of the fixed portion of the workpiece 200, ensuring that the workpiece 200 will not shake or become unstable during the micro-forging process, thereby improving the reliability of the workpiece 200 during micro-forging.

[0050] Furthermore, the connecting portion 21 is provided with side walls at both ends along the second direction, the connecting portion 21 abuts against the main body 11 of the fixing member 10 along the third direction, and the main body 11 of the fixing member 10 is clamped in the two side walls to limit the connecting portion 21 in the second direction; the fixing member 10 is provided with clamping walls 12 at both ends along the first direction, and the connecting portion 21 is clamped in the two clamping walls 12 to limit the connecting portion 21 in the first direction; thus, a limited connection can be achieved between the fixing member 10 and the clamp body 20 along the first direction, the second direction and the third direction.

[0051] In some embodiments, a first groove 211 is provided between the connecting portion 21 and its side wall, and a second groove 212 is provided at one end of the connecting portion 21 facing the fixing portion. Both the first groove 211 and the second groove 212 are used to avoid interference with the fixing part 10 or the forged part 200.

[0052] In some embodiments, the shape of the installation groove 221 is the same as the shape of the fixing portion of the workpiece 200 to be forged, so that the fixing portion of the workpiece 200 to be forged can be installed in the installation groove 221 .

[0053] Optionally, a threaded hole 224 is provided on the mounting portion 22 , and a fixing hole 31 is provided on the clamping member 30 . A bolt passes through the fixing hole 31 and is threadedly connected to the threaded hole 224 to tighten the clamping member 30 to the mounting portion 22 .

[0054] Optionally, the mounting portion 22 is further provided with a plurality of limiting blocks 223 , and the clamping member 30 is disposed between two adjacent limiting blocks 223 . The limiting blocks 223 are provided to limit the position of the clamping member 30 .

[0055] Specifically, at least one side of the mounting portion 22 along the second direction is provided with two limit blocks 223 spaced apart along the third direction, and the clamping member 30 is arranged between the two limit blocks 223 to achieve installation positioning of the clamping member 30, making it easier to install the clamping member 30.

[0056] In some embodiments, the workpiece 200 is further provided with a limiting hole 220, which cooperates with a limiting column 222 to limit the workpiece 200 along a third direction.

[0057] Please refer to Figure 4 and Figure 5 The embodiment also provides a microforging processing method for a notched thin-walled part, which comprises the following steps: S10, preparation: fixing a workpiece 200 in a clamp according to preset requirements, and installing the clamp on a work platform of a microforging device; and S20, microforging strengthening: along a preset path around the workpiece 200, a hammer 300 of the microforging device hammers an end surface of the workpiece 200 until the microforging of the end surface of the workpiece 200 is completed.

[0058] The microforging processing method for a notched thin-walled part in the embodiment can realize the microforging of each surface and edge of the region of the workpiece 200 that needs to be microforged by optimizing a processing path 400 and hammering the end surface of the workpiece 200 along the preset path around the workpiece 200, thereby avoiding the deformation of the edge with the notched thin-walled part, improving the microforging success rate and quality of the workpiece 200, and realizing the microforging processing method for the notched thin-walled part with small deformation and high quality.

[0059] Specifically, in step S10, the fixing of the workpiece 200 in the clamp according to preset requirements comprises: fixing a fixed end of the workpiece 200 in the clamp, and extending a workpiece part of the workpiece 200 out of the clamp to keep the workpiece part of the workpiece 200 in a suspended state, so that the hammer 300 has a space for microforging along the circumferential direction thereof.

[0060] Further, in step S20, the workpiece 200 and / or the hammer 300 of the microforging device rotates along the axial direction of the workpiece 200, so that the hammer 300 of the microforging device can perform surface microforging along the circumferential direction of the workpiece 200.

[0061] In an optional embodiment, the hammer 300 rotates along the axial direction of the workpiece 200 and hammers the workpiece 200 to realize the processing of the workpiece 200 along the rotation path thereof.

[0062] In an optional embodiment, the workpiece 200 is driven by a clamping tool of the microforging device to rotate along the axial direction thereof, and the hammer 300 hammers the workpiece 200 to realize the processing of the workpiece 200 along the rotation path thereof.

[0063] In an alternative embodiment, the workpiece 200 and the forging hammer 300 of the micro-forging device are both rotated along the axial direction of the workpiece 200, and the rotating directions are opposite, so that the forging hammer 300 can process along the rotating path of the workpiece 200.

[0064] Optionally, the rotation of the workpiece 200 and the forging hammer 300 of the micro-forging device can be driven by a driving member such as a motor, which is not limited here.

[0065] In some embodiments, in step S20, the stroke of the forging hammer 300 of the micro-forging device hitting the surface of the workpiece 200 increases with the increase of the thickness of the workpiece 200. That is, the stroke of the forging hammer 300 can be adjusted according to actual needs. In the place where the thickness of the workpiece 200 is large, the stroke is large, so as to increase the hammering force of the forging hammer 300, to ensure the strengthening of the surface, and in the place where the thickness of the workpiece 200 is small, the stroke is reduced, to reduce the impact force of the forging hammer 300, to avoid deformation caused by hammering; and then the strength treatment of each surface of the workpiece 200 is realized.

[0066] Please refer to Figure 6 In some embodiments, in step S20, the stroke of the forging hammer 300 of the micro-forging device hitting the surface of the workpiece 200 is greater than the stroke of the forging hammer 300 of the micro-forging device hitting the edge of the workpiece 200. As shown in Figure 6 The stroke h1 of the forging hammer 300 in the planar area is greater than the stroke h2 of the forging hammer 300 at the edge.

[0067] It should be noted that when the edge of the workpiece is provided with a fillet 230, the stroke of the edge is the stroke at the fillet 230.

[0068] Optionally, the driving end of the forging hammer 300 can be provided with an adjustable stroke cylinder, so as to realize the change of the stroke of the forging hammer 300. It can be understood that in other embodiments, the driving structure of the forging hammer 300 can be other structures, which are not limited here.

[0069] In some embodiments, in step S20, the forging hammer 300 of the micro-forging device and / or the workpiece 200 can be angle-adjusted, so as to be perpendicular to the surface of the workpiece 200. The perpendicular arrangement of the forging hammer 300 and the surface ensures that the hammering force of the forging hammer 300 is fully applied to the surface, so that the strengthening effect of the surface is better.

[0070] It can be understood that the structure that the forging hammer 300 of the micro-forging device and / or the workpiece 200 can be angle-adjusted can be realized by a driving motor and the like, which is not limited here.

[0071] Optionally, the micro forging equipment prevents the position of the forging hammer 300 from being provided with a position detection member to detect whether the forging hammer 300 and the forging surface of the workpiece 200 are perpendicular, so that the forging hammer 300 can be continuously adjusted during the working process, and better micro forging strengthening treatment of the forging surface is realized.

[0072] Please refer to Figure 7 In some embodiments, in step S20, when the forging hammer 300 of the micro forging equipment hammers the forging surface of the workpiece 200, the micro forging is performed according to the preset inter-rotation feed speed and the preset inter-rotation step distance, so as to adjust the residual stress distribution, deformation and surface finishing effect introduced to the workpiece 200.

[0073] It should be noted that the preset inter-rotation feed speed is the speed of the forging hammer 300 during the feeding and hammering micro forging along one circumferential direction, that is, the feeding speed per unit time between the falling point of the forging hammer 300 on the surface along the micro forging path and the falling point of the previous forging hammer 300, which can make the spacing between the falling points of the forging hammers 300 along the circumferential path different.

[0074] The preset inter-rotation step distance is the distance between two adjacent micro forging circumferential paths after the forging hammer 300 hammers the micro forging along one circumferential path of the workpiece 200.

[0075] By changing the preset inter-rotation feed speed and the preset inter-rotation step distance, the hammering conditions of the micro forging hammers 300 at various positions of the forging surface of the entire planar region can be adjusted, so that the end surface stress distribution of the workpiece 200 is uniform, the deformation degree is low, and the surface is smoother.

[0076] Optionally, in the present embodiment, the preset inter-rotation feed speed gradually increases from the edge to the inside along the radial direction of the forging surface, so that the middle position of the forging surface along the circumferential direction is hammered by the forging hammer 300 more frequently and densely.

[0077] Further optionally, in the present embodiment, the preset inter-rotation step distance gradually increases from the outside to the inside along the axial direction of the forging surface, so that the distance between the adjacent circumferential paths of the middle position is larger, and thus the two sides of the forging surface along the axial direction are hammered by the forging hammer 300 more frequently and densely.

[0078] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present application. Here, it is not necessary and impossible to enumerate all the implementation modes. Any modification, equivalent substitution and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A micro-forging method for thin-walled parts with gaps, characterized in that: include: Step S10, preparation work: fixing the workpiece (200) to be forged in a fixture according to preset requirements, and installing the fixture on the working platform of the micro-forging equipment; Step S20, micro-forging strengthening: along a preset circumferential path of the workpiece (200), the forging hammer (300) of the micro-forging equipment hammers the forging surface of the workpiece (200) until all the forging surfaces of the workpiece (200) are micro-forged.

2. The micro-forging method for thin-walled parts with notches according to claim 1, characterized in that: In the step S20, the workpiece (200) to be forged and / or the forging hammer (300) of the micro-forging equipment rotates along the axial direction of the workpiece (200) to be forged, so that the forging hammer (300) of the micro-forging equipment can perform surface micro-forging along the circumference of the workpiece (200).

3. The micro-forging method for thin-walled parts with notches according to claim 1, characterized in that: In the step S20, the stroke of the forging hammer (300) of the micro-forging equipment striking the forging surface of the workpiece (200) to be forged increases as the thickness of the workpiece (200) to be forged increases.

4. The micro-forging method for thin-walled parts with notches according to claim 1, characterized in that: In the step S20, the stroke of the forging hammer (300) of the micro-forging equipment striking the surface of the workpiece (200) to be forged is greater than the stroke of the forging hammer (300) of the micro-forging equipment striking the edge of the workpiece (200) to be forged.

5. The micro-forging method for thin-walled parts with notches according to claim 1, characterized in that: In step S20, the forging hammer (300) of the micro-forging equipment and / or the workpiece (200) to be forged can be finely adjusted in angle so that the forging hammer (300) of the micro-forging equipment and the forging surface of the workpiece (200) to be forged are arranged perpendicularly.

6. The micro-forging method for thin-walled parts with notches according to claim 1, characterized in that: In the step S20, when the forging hammer (300) of the micro-forging equipment hammers the forging surface of the workpiece (200) to be forged, micro-forging is performed according to a preset feed speed and a preset step distance between cycles.

7. The micro-forging method for thin-walled parts with notches according to any one of claims 1 to 6, characterized in that: In the step S10, the method of fixing the workpiece (200) to be forged to the fixture according to preset requirements includes: fixing the fixing portion of the workpiece (200) to be forged to the fixture, and the part to be forged of the workpiece (200) to be forged extends out of the fixture.

8. A fixture, characterized in that The micro-forging method for a thin-walled part with a notch as claimed in any one of claims 1 to 7, wherein the fixture comprises: A fixing member (10) is used for connecting with the working platform of the micro-forging equipment; A clamp body (20), the clamp body (20) comprising a connecting portion (21) and a mounting portion (22) connected to each other, the connecting portion (21) being positionally connected to one end of the fixing member (10), the mounting portion (22) being used for positionally mounting the fixing portion of the workpiece (200) to be forged, and allowing the part to be forged of the workpiece (200) to extend out of the mounting portion (22); A clamping member (30) is detachably connected to the mounting portion (22) along a first direction to fix the fixing portion of the workpiece (200) to be forged between the mounting portion (22) and the clamping member (30) along the first direction.

9. The clamp according to claim 8, characterized in that The mounting portion (22) is provided with a mounting groove (221), the groove walls of the mounting groove (221) are arranged relative to each other along the second direction, and the mounting groove (221) is used to mount the workpiece (200) to limit the position of the workpiece (200) along the second direction; the groove bottom of the mounting groove (221) is provided with a limiting column (222), and the limiting column (222) can be connected to the workpiece (200) to limit the position of the workpiece (200) along the third direction, and the first direction, the second direction and the third direction are arranged perpendicular to each other.

10. The clamp according to claim 9, characterized in that The connecting portion (21) is provided with side walls at both ends along the second direction, the connecting portion (21) abuts against the main body (11) of the fixing member (10) along the third direction, and the main body (11) of the fixing member (10) is clamped in the two side walls to limit the connecting portion (21) in the second direction; the fixing member (10) is provided with clamping walls (12) at both ends along the first direction, and the connecting portion (21) is clamped in the two clamping walls (12) to limit the connecting portion (21) in the first direction.

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