Positioning mechanism, clamp and welding equipment

Abstract

The utility model belongs to the technical field of battery machining, and particularly relates to a positioning mechanism, a clamp and welding equipment, the positioning mechanism comprises an abutting assembly, a connecting rod assembly and a driving assembly, and the abutting assembly is used for abutting against a workpiece to position the workpiece; the connecting rod assembly is used for being connected with the abutting assembly to drive the abutting assembly to be close to or away from a workpiece, the driving assembly comprises a pull rod and a mounting base, the pull rod is connected with the connecting rod assembly, the pull rod is slidably connected with the mounting base, and at least one limiting part is arranged on the pull rod. The mounting seat is provided with at least one adsorption part in the sliding direction of the pull rod, the pull rod slides on the mounting seat and can rotate the connecting rod assembly so that the abutting assembly can be close to or away from a workpiece, and the adsorption part on the mounting seat and the limiting part on the pull rod attract each other so that the pull rod can be fixed. Position deviation of the top cover in the welding process is prevented, the welding effect is improved, and the product yield is increased.

Description

Technical Field

[0001] The present application belongs to the field of battery processing technology, and more specifically, relates to a positioning mechanism, a fixture and a welding device. Background Art

[0002] Square aluminum shell lithium battery has many advantages such as simple structure, good impact resistance, high energy density, etc. It is the main direction of domestic lithium battery manufacturing and development. Square aluminum shell lithium battery is generally composed of battery cell, electrolyte, shell, top cover and other components. In the manufacturing and assembly process of square aluminum shell lithium battery, laser welding process needs to be widely used, such as: battery cell soft connection and cover welding, cover sealing welding, sealing nail welding, etc. The top cover sealing weld is the longest weld in the square aluminum shell battery and also the weld that takes the longest time to weld. If the position of the top cover shifts during the welding process, it will cause unqualified welding and reduce the product yield. Utility Model Content

[0003] The embodiments of the present application provide a positioning mechanism, a clamp and a welding device to prevent the top cover from shifting during the welding process, thereby improving the welding effect and the product yield.

[0004] The technical solution adopted in the embodiment of the present application is: to provide a positioning mechanism, including:

[0005] An abutment assembly, used for abutting against a workpiece to position the workpiece;

[0006] A connecting rod assembly, used to connect with the abutment assembly to drive the abutment assembly to move closer to or away from a workpiece;

[0007] The driving assembly includes a pull rod and a mounting seat, wherein the pull rod is connected to the connecting rod assembly, and the pull rod is slidably connected to the mounting seat. The pull rod is provided with at least one limiting portion, and the mounting seat is provided with at least one adsorption portion along the sliding direction of the pull rod. The pull rod slides on the mounting seat to rotate the connecting rod assembly to make the abutment assembly approach or move away from the workpiece, and the adsorption portion on the mounting seat attracts the limiting portion on the pull rod to fix the pull rod.

[0008] Optionally, the at least one adsorption portion includes a first magnetic portion and a second magnetic portion, the first magnetic portion and the second magnetic portion are arranged at intervals on the sliding path of the pull rod, and the limiting portion on the pull rod is arranged between the first magnetic portion and the second magnetic portion. The pull rod slides on the mounting seat to make the limiting portion on the pull rod close to the first magnetic portion or the second magnetic portion. When the limiting portion on the pull rod is close to the first magnetic portion, the pull rod rotates the connecting rod assembly to make the abutment assembly close to the workpiece. When the limiting portion on the pull rod is close to the second magnetic portion, the pull rod rotates the connecting rod assembly in the opposite direction to make the abutment assembly away from the workpiece.

[0009] Optionally, the connecting rod assembly includes a first connecting rod, a second connecting rod, a hinge and an articulated bracket, the first connecting rod is hinged to the abutment assembly, the first connecting rod is hinged to the hinge, the second connecting rod is hinged to the hinge, the second connecting rod is connected to the pull rod, the hinge is hinged to the articulated bracket, and the abutment assembly is hinged to the articulated bracket.

[0010] Optionally, the abutment assembly includes a pressure rod and a pressure block, the pressure block is connected to the pressure rod, the pressure rod is hinged to the connecting rod assembly, and the pressure block is used to abut against the workpiece to position the workpiece.

[0011] An embodiment of the present application also provides a clamp, including the positioning mechanism described above, and also including a limit seat, the limit seat including a base and a plurality of side walls arranged on the base, the side walls are arranged on the base to form a limit groove for accommodating a workpiece, the driving component of the positioning mechanism is installed on the base, and the abutment component of the positioning mechanism is used to abut against a side of the workpiece away from the base.

[0012] Optionally, the fixture further comprises a side-push clamping assembly, wherein the side-push clamping assembly is disposed on a side wall of the limit seat, and the side-push clamping assembly is used to push the workpiece to abut against the side wall of the limit seat to position the workpiece.

[0013] Optionally, the side push clamping assembly includes a push block, a push rod, a pulling member and an elastic member, the push block is located in the limiting groove to abut against the side wall of the workpiece, the push block is connected to the push rod, the push rod is passed through the side wall of the limiting seat, the pulling member is located outside the limiting groove and connected to the push rod, the elastic member abuts against the push block and the side wall of the limiting seat, and pulling the pulling member can move the push block toward the side wall of the limiting seat to facilitate the workpiece to be placed in the limiting groove, and the pulling member is released, and the elastic member pushes the push block to move toward the side wall of the workpiece so that the push block abuts against the side wall of the workpiece.

[0014] Optionally, a follower plate is provided on the base, the follower plate is slidably connected to the base, the follower plate is arranged in the limiting groove, and the follower plate is used to support the workpiece.

[0015] Optionally, the follower plate is provided with a contoured groove matching the workpiece.

[0016] An embodiment of the present application also provides a welding device, including the clamp described above.

[0017] The positioning mechanism, the clamp and the welding equipment provided by the embodiments of the present application have the following beneficial effects: the positioning mechanism of the embodiments of the present application pulls the pull rod to make the pull rod slide on the mounting seat, and the pull rod pulls the connecting rod assembly during the sliding process to rotate the connecting rod assembly, so that the abutment assembly hinged to the connecting rod assembly rotates toward the direction close to the top cover, so that the abutment assembly abuts against the top cover, and the top cover is positioned to prevent the top cover from shifting in position during the welding process, or the pull rod pulls the connecting rod assembly during the reverse sliding process to make the connecting rod assembly rotate in the reverse direction, so that the abutment assembly hinged to the connecting rod assembly rotates away from the top cover, so that the battery after the top cover is welded can be transferred to the next workstation, in this way, the top cover can be prevented from shifting in position during the welding process, thereby improving the welding effect of the battery and the product yield;

[0018] Furthermore, the connecting rod assembly is driven by the pull rod, and the pull rod is fixed by the suction portion and the limiting portion. In the absence of a power drive member such as a motor or a cylinder, the control of the abutment assembly by the connecting rod assembly can be achieved. Compared with controlling the connecting rod assembly by a power drive member such as a motor or a cylinder, the positioning mechanism of the embodiment of the present application has a lower cost.

[0019] The clamp of the embodiment of the present application includes the above-mentioned positioning mechanism, so it has the beneficial effects brought by the above-mentioned positioning mechanism, which will not be described in detail here;

[0020] Since the welding equipment of the embodiment of the present application includes the above-mentioned clamp, it has the beneficial effects brought by the above-mentioned clamp, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 A schematic diagram of the three-dimensional structure of the positioning mechanism provided in an embodiment of the present application;

[0023] Figure 2 A side view of a positioning mechanism provided in an embodiment of the present application;

[0024] Figure 3 A schematic diagram of the three-dimensional structure of a clamp provided in an embodiment of the present application;

[0025] Figure 4 This is a schematic diagram of the three-dimensional structure of the base used in the embodiment of the present application.

[0026] Among them, the reference numerals in the figure are:

[0027] 1. abutment assembly; 11. pressure rod; 12. pressure block;

[0028] 2. connecting rod assembly; 21. first connecting rod; 22. second connecting rod; 23. hinge; 24. hinge bracket;

[0029] 3. driving assembly; 31. pull rod; 32. mounting seat; 311. limiting part;

[0030] 321, first magnetic attraction portion; 322, second magnetic attraction portion;

[0031] 4. Limit seat; 41. Base; 42. Side wall; 43. Follower plate; 431. Profile groove;

[0032] 5. Side push clamping assembly; 51. Push block; 52. Push rod; 53. Pulling member; 54. Elastic member. DETAILED DESCRIPTION

[0033] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0034] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0035] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0037] See also Figure 1 and Figure 2, the positioning mechanism provided in the embodiment of the present application is now described. The positioning mechanism provided in the embodiment of the present application includes an abutment assembly 1, a connecting rod assembly 2 and a driving assembly 3. The abutment assembly 1 is used to abut against a workpiece to position the workpiece, the connecting rod assembly 2 is used to connect with the abutment assembly 1 to drive the abutment assembly 1 to approach or move away from the workpiece, and the driving assembly 3 includes a pull rod 31 and a mounting seat 32, the pull rod 31 is connected to the connecting rod assembly 2, the pull rod 31 is slidably connected to the mounting seat 32, at least one limiting portion 311 is provided on the pull rod 31, and the mounting seat 32 is provided with at least one adsorption portion along the sliding direction of the pull rod 31, the pull rod 31 slides on the mounting seat 32 to rotate the connecting rod assembly 2 to make the abutment assembly 1 approach or move away from the workpiece, and the adsorption portion on the mounting seat 32 attracts the limiting portion 311 on the pull rod 31 to fix the pull rod 31.

[0038] The workpiece in the embodiment of the present application is a battery to be welded with a top cover placed on top. In addition, the workpiece can also be other processed products.

[0039] The connecting rod assembly 2 may include an articulated base 41 and a support rod, the support rod is articulated with the articulated base 41, one end of the support rod is connected to the abutment assembly 1, and the other end of the support rod is connected to the pull rod 31. The pull rod 31 slides on the mounting seat 32, and can pull the support rod to rotate on the articulated base 41, so that the abutment assembly 1 at the other end of the support rod is close to or away from the workpiece. The abutment assembly 1 may be an abutment block arranged on the support rod.

[0040] The mounting seat 32 is provided with a slide groove, the pull rod 31 is inserted into the slide groove and can slide in the slide groove, and the mounting seat 32 is also provided with a through hole connected with the slide groove, the through hole is strip-shaped, and the length direction of the through hole is the sliding direction of the pull rod 31, and the limiting portion 311 on the pull rod 31 protrudes outward from the through hole, and when the pull rod 31 slides in the slide groove, the limiting portion 311 on the pull rod 31 can slide along the length direction of the through hole. The adsorption portion of the mounting seat 32 is set at the edge of the through hole, and the limiting portion 311 can approach the adsorption portion along the length direction of the through hole. The limiting portion 311 and the adsorption portion attract each other to limit the sliding of the pull rod 31, thereby fixing the pull rod 31, the connecting rod assembly 2 stops rotating, and the abutment assembly 1 is stationary.

[0041] The pull rod 31 in the embodiment of the present application may be provided with two limiting parts 311 at intervals, which are respectively the first limiting part and the second limiting part, and the adsorption part of the mounting part may be provided with only one. When the pull rod 31 slides on the mounting seat 32, the first limiting part on the pull rod 31 is close to the adsorption part of the mounting part, the connecting rod assembly 2 rotates the abutting assembly 1, so that the abutting assembly 1 moves toward the direction close to the workpiece, the first limiting part and the adsorption part attract each other, the position of the pull rod 31 is fixed, the connecting rod assembly 2 stops rotating, and the abutting assembly 1 abuts against the workpiece; when the pull rod 31 slides in the opposite direction on the mounting seat 32, the first limiting part on the pull rod 31 is away from the adsorption part of the mounting part, the second limiting part on the pull rod 31 is close to the adsorption part of the mounting part, the connecting rod assembly 2 rotates the abutting assembly 1 in the opposite direction, so that the abutting assembly 1 moves away from the workpiece, the second limiting part and the adsorption part attract each other, the position of the pull rod 31 is fixed, the connecting rod assembly 2 stops rotating, and the abutting assembly 1 releases the workpiece. In this way, the workpiece can be prevented from being displaced during the welding process, thereby improving the welding effect and the product yield.

[0042] The connecting rod assembly 2 is driven by the pull rod 31, and the pull rod 31 is fixed by the attraction between the adsorption portion and the limiting portion 311. In the absence of a power driving component such as a motor or a cylinder, the abutment assembly 1 can be controlled by the connecting rod assembly 2 to make the abutment assembly 1 approach or move away from the workpiece. Compared with controlling the connecting rod assembly 2 by a power driving component such as a motor or a cylinder, the positioning mechanism of the embodiment of the present application has a lower cost.

[0043] Preferably, the at least one adsorption portion includes a first magnetic portion 321 and a second magnetic portion 322, the first magnetic portion 321 and the second magnetic portion 322 are arranged at intervals on the sliding path of the pull rod 31, and the limiting portion 311 on the pull rod 31 is arranged between the first magnetic portion 321 and the second magnetic portion 322. The pull rod 31 slides on the mounting seat 32 to make the limiting portion 311 on the pull rod 31 close to the first magnetic portion 321 or the second magnetic portion 322. When the limiting portion 311 on the pull rod 31 is close to the first magnetic portion 321, the pull rod 31 rotates the connecting rod assembly 2 to make the abutment assembly 1 close to the workpiece. When the limiting portion 311 on the pull rod 31 is close to the second magnetic portion 322, the pull rod 31 rotates the connecting rod assembly 2 in the opposite direction to make the abutment assembly 1 away from the workpiece.

[0044] In the embodiment of the present application, only one limiting portion 311 may be provided on the pull rod 31, which moves back and forth between the first magnetic portion 321 and the second magnetic portion 322. The materials of the first magnetic portion 321 and the second magnetic portion 322 may be magnets, and the material of the limiting portion 311 may be a metal material that is attracted by magnets. Alternatively, the materials of the first magnetic portion 321 and the second magnetic portion 322 may be magnets with the same magnetic properties, and the material of the limiting portion 311 may be a magnet with a different magnetic property from that of the first magnetic portion 321 and the second magnetic portion 322. The limiting portion 311 is attracted to the first magnetic portion 321 and the second magnetic portion 322 by magnetic adsorption, respectively. Compared with the attraction by vacuum adsorption, the circuit of the positioning mechanism can be reduced to prevent the circuit from being entangled when the mechanism is running.

[0045] Preferably, the connecting rod assembly 2 includes a first connecting rod 21, a second connecting rod 22, a hinge 23 and an articulated bracket 24, the first connecting rod 21 is hinged to the abutment assembly 1, the first connecting rod 21 is hinged to the hinge 23, the second connecting rod 22 is hinged to the hinge 23, the second connecting rod 22 is connected to the pull rod 31, the hinge 23 is hinged to the articulated bracket 24, and the abutment assembly 1 is hinged to the articulated bracket 24.

[0046] The abutment assembly 1 comprises a pressure rod 11 and a pressure block 12 . The pressure block 12 is connected to the pressure rod 11 . The pressure rod 11 is hinged to the connecting rod assembly 2 . The pressure block 12 is used to abut against a workpiece to position the workpiece.

[0047] In the embodiment of the present application, the first connecting rod 21, the second connecting rod 22, and the pressure rod 11 are all straight rods, the hinge 23 can be set as a rotating plate including a first hinge point, a second hinge point, and a third hinge point, and the articulated bracket 24 includes a fourth hinge point and a fifth hinge point. One end of the first connecting rod 21 is hinged to the middle of the pressure rod 11 of the abutment assembly 1, the other end of the first connecting rod 21 is hinged to the first hinge point of the hinge 23, the second hinge point of the hinge 23 is hinged to the fourth hinge point of the articulated bracket 24, the third hinge point of the hinge 23 is hinged to one end of the second connecting rod 22, the other end of the second connecting rod 22 is connected to the pull rod 31, one end of the pressure rod 11 is connected to the pressure block 12, and the other end of the pressure rod 11 is hinged to the fifth hinge point of the articulated bracket 24.

[0048] The pull rod 31 moves downward in the vertical direction on the mounting seat 32, and the limiting portion 311 on the pull rod 31 moves toward the direction close to the second magnetic portion 322, and the first hinge point where the hinge 23 and the first connecting rod 21 are hinged rotates toward the pull rod 31, so that the first connecting rod 21 pulls the pressure rod 11, and the pressure block 12 on the pressure rod 11 rotates toward the direction close to the pull rod 31, that is, the pressure block 12 rotates away from the workpiece. When the limiting portion 311 on the pull rod 31 is attracted to the second magnetic portion 322, the workpiece can be moved to the next workstation; otherwise, the limiting portion 311 is attracted to the first magnetic portion 321, and the pressure block 12 abuts against the workpiece to prevent the workpiece from shifting in position during welding, thereby improving the welding effect and product yield.

[0049] See also Figure 3 The embodiment of the present application also provides a clamp, including the positioning mechanism described above, and also includes a limit seat 4, the limit seat 4 includes a base 41 and a plurality of side walls 42 arranged on the base 41, the side walls 42 are surrounded on the base 41 to form a limit groove for accommodating a workpiece, the driving component 3 of the positioning mechanism is installed on the base 41, and the abutment component 1 of the positioning mechanism is used to abut against a side of the workpiece away from the base 41.

[0050] Since the clamp of the embodiment of the present application includes the positioning mechanism in any of the above embodiments, it has the beneficial effects brought by the positioning mechanism in any of the above embodiments, which will not be described in detail here.

[0051] The clamp further comprises a side push clamping assembly 5 , which is disposed on the side wall 42 of the limiting seat 4 , and is used to push the workpiece to abut against the side wall 42 of the limiting seat 4 to position the workpiece.

[0052] The side push clamping assembly 5 in the embodiment of the present application may include a push plate and a cylinder. The cylinder is arranged on the side wall 42 of the limit seat 4. The push plate is used to abut the workpiece. The push plate is transmission-connected to the cylinder. The cylinder can push the push plate to abut the workpiece to push the workpiece to abut the side wall 42 of the limit seat 4, thereby realizing side positioning of the workpiece, which can improve the welding accuracy and improve the welding effect.

[0053] Preferably, the side push clamping assembly 5 includes a push block 51, a push rod 52, a pulling member 53 and an elastic member 54, the push block 51 is located in the limiting groove to abut against the side wall 42 of the workpiece, the push block 51 is connected to the push rod 52, the push rod 52 is passed through the side wall 42 of the limiting seat 4, the pulling member 53 is located outside the limiting groove and connected to the push rod 52, the elastic member 54 abuts against the push block 51 and the side wall 42 of the limiting seat 4, pulling the pulling member 53 can make the push block 51 move toward the side wall 42 of the limiting seat 4 to facilitate the workpiece to be placed in the limiting groove, release the pulling member 53, and the elastic member 54 pushes the push block 51 to move toward the side wall 42 of the workpiece so that the push block 51 abuts against the side wall 42 of the workpiece.

[0054] The elastic member 54 may be an elastic member such as a spring, and the spring is sleeved on the push rod 52. The elastic member 54 can prevent the workpiece from being crushed, scratched, or other poor quality phenomena caused by rigid connection and compression.

[0055] See also Figure 4 A follower plate 43 is provided on the base 41, and the follower plate 43 is slidably connected to the base 41. The follower plate 43 is arranged in the limiting groove, and the follower plate 43 is used to support the workpiece.

[0056] When the side-push clamping assembly 5 pushes the workpiece into position, there is relative sliding friction between the bottom of the workpiece and the base 41, which may cause scratches on the appearance of the workpiece product. The follower plate 43 can prevent the bottom of the workpiece from having relative sliding friction with the base 41. The follower plate 43 is slidably set on the linear guide rail of the base 41. When the side-push clamping assembly 5 pushes the workpiece, the follower plate 43 will move synchronously with the workpiece.

[0057] The following plate 43 is provided with a profiling groove 431 which matches with the workpiece. The profiling groove 431 can prevent the workpiece from sliding on the following plate 43.

[0058] An embodiment of the present application also provides a welding device, comprising the clamp in any of the above embodiments.

[0059] Since the welding equipment of the embodiment of the present application includes the clamp in any of the above embodiments, it has the beneficial effects brought by the clamp in any of the above embodiments, which will not be described in detail here.

[0060] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A positioning mechanism, characterized in that: include: An abutment assembly, used for abutting against a workpiece to position the workpiece; A connecting rod assembly, used to connect with the abutment assembly to drive the abutment assembly to move closer to or away from a workpiece; The driving assembly includes a pull rod and a mounting seat, wherein the pull rod is connected to the connecting rod assembly, and the pull rod is slidably connected to the mounting seat. The pull rod is provided with at least one limiting portion, and the mounting seat is provided with at least one adsorption portion along the sliding direction of the pull rod. The pull rod slides on the mounting seat to rotate the connecting rod assembly to make the abutment assembly approach or move away from the workpiece, and the adsorption portion on the mounting seat attracts the limiting portion on the pull rod to fix the pull rod.

2. The positioning mechanism according to claim 1, characterized in that: The at least one adsorption part includes a first magnetic part and a second magnetic part, the first magnetic part and the second magnetic part are arranged at intervals on the sliding path of the pull rod, and the limiting part on the pull rod is arranged between the first magnetic part and the second magnetic part. The pull rod slides on the mounting seat to make the limiting part on the pull rod close to the first magnetic part or the second magnetic part. When the limiting part on the pull rod is close to the first magnetic part, the pull rod rotates the connecting rod assembly to make the abutting assembly close to the workpiece. When the limiting part on the pull rod is close to the second magnetic part, the pull rod rotates the connecting rod assembly in the opposite direction to make the abutting assembly away from the workpiece.

3. The positioning mechanism according to claim 1, characterized in that: The connecting rod assembly includes a first connecting rod, a second connecting rod, a hinge and an articulated bracket, the first connecting rod is hinged to the abutment assembly, the first connecting rod is hinged to the hinge, the second connecting rod is hinged to the articulated bracket, the second connecting rod is connected to the pull rod, the articulated bracket is hinged to the hinge, and the abutment assembly is hinged to the articulated bracket.

4. The positioning mechanism according to any one of claims 1 to 3, characterized in that: The abutment assembly comprises a pressure rod and a pressure block, wherein the pressure block is connected to the pressure rod, the pressure rod is hinged to the connecting rod assembly, and the pressure block is used to abut against a workpiece to position the workpiece.

5. A clamp, characterized in that: The positioning mechanism comprises the positioning mechanism described in any one of claims 1 to 4, and further comprises a limit seat, wherein the limit seat comprises a base and a plurality of side walls arranged on the base, the side walls are arranged on the base to form a limit groove for accommodating a workpiece, the driving component of the positioning mechanism is installed on the base, and the abutment component of the positioning mechanism is used to abut against a side of the workpiece away from the base.

6. The clamp according to claim 5, characterized in that: It also includes a side push clamping assembly, which is arranged on the side wall of the limiting seat and is used to push the workpiece to abut against the side wall of the limiting seat to position the workpiece.

7. The clamp according to claim 6, characterized in that The side push clamping assembly includes a push block, a push rod, a pulling member and an elastic member, the push block is located in the limiting groove to abut against the side wall of the workpiece, the push block is connected to the push rod, the push rod is penetrated through the side wall of the limiting seat, the pulling member is located outside the limiting groove and connected to the push rod, the elastic member abuts against the push block and the side wall of the limiting seat, and pulling the pulling member can move the push block toward the side wall of the limiting seat to facilitate the workpiece to be placed in the limiting groove, and the pulling member is released, and the elastic member pushes the push block to move toward the side wall of the workpiece to abut against the side wall of the workpiece.

8. The clamp according to claim 5, characterized in that: A follower plate is arranged on the base, the follower plate is slidably connected to the base, the follower plate is arranged in the limiting groove, and the follower plate is used to support the workpiece.

9. The clamp according to claim 8, characterized in that The follower plate is provided with a contoured groove matched with the workpiece.

10. A welding device, characterized in that: A clamp comprising the clamp described in any one of claims 5-9.

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