A fixture for automatic assembly of welding clamps

Abstract

The present invention relates to the technical field of clamps, and specifically discloses a clamp for automatic assembly of welding tongs, comprising a base, an electric slide rail, a first clamping structure and a second clamping structure; the base is rectangular, the electric slide rail is fixedly arranged at the middle of the upper wall at the right end of the base, and a pair of relatively movable platforms are arranged on the electric slide rail, the first clamping structure is fixedly arranged on one of the movable platforms of the electric slide rail, and the second clamping structure is fixedly arranged on the other movable platform; the present invention can symmetrically clamp the jaw ends of two handles, which is convenient for installation and fixation. For a Z-shaped handle, the other end can be limited and fixed by a lower limit unit, which is convenient for relatively stable movement and assembly of the two handles; a force-applying unit can be used to push a gasket into a cable interface of the handle, and manual knocking and installation are unnecessary, which saves time and effort; the equipment can be adjusted accordingly according to the actual size of the handle and the welding tongs, and has strong versatility.

Description

Technical Field

[0001] The invention relates to the technical field of clamps, in particular to a clamp for automatic assembly of electric welding tongs. Background Art

[0002] Electric welding pliers are a tool used for electric welding operations, usually composed of the following parts: jaws: used to clamp the welding rod, and the jaws are located at the ends of two handles, wherein the two handles are movably connected by a pin, and a spring is installed in the clamp to assist in clamping the welding rod, and an insulating part is provided at the end of the handle, which is mostly a tubular structure, and the insulating part of one of the handles is an interface for connecting the cable, which is used to connect the cable of the welding equipment, and a metal gasket needs to be inserted into the cable interface and the gasket is tightened to the wiring with the help of screws. Therefore, a clamp for automatic assembly of electric welding pliers is designed. Summary of the invention

[0003] The object of the present invention is to provide a fixture for automatic assembly of welding tongs to solve the problems raised in the above-mentioned background technology.

[0004] In order to solve the above-mentioned problem, the present invention provides the following technical solution: a fixture for automated assembly of welding tongs, comprising a base, an electric slide rail, a first clamping structure and a second clamping structure; the base is rectangular, the electric slide rail is fixedly arranged at the middle of the upper wall at the right end of the base, and a pair of relatively movable platforms are arranged on the electric slide rail, the first clamping structure is fixedly arranged on one of the movable platforms of the electric slide rail, and the second clamping structure is fixedly arranged on the other movable platform.

[0005] Preferably, the first clamping structure comprises a first clamping unit and a limiting unit, the first clamping unit is fixedly disposed on the moving platform, and the limiting unit is detachably disposed on the first clamping unit.

[0006] Preferably, the first clamping unit includes a first slide, a first motor, a first spiral rod, a first movable seat, a pair of transfer rods, a lower clamping plate, an upper clamping plate and a width-adjusting bolt; one end of the first slide is fixedly arranged on one of the movable platforms of the electric slide rail, and a first slide groove is arranged in the middle of the left side wall at the top end of the first slide; the first motor is fixedly arranged on the upper wall of the first slide, and the driving end movably passes through the upper wall of the first slide groove; the first spiral rod is movably embedded in the first slide groove, and one end of the spiral rod is connected to the driving end of the first motor; one end of the first movable seat is movably embedded in the first slide groove , and is screwed with the first spiral rod, one end of a pair of transfer rods are symmetrically arranged on the left side wall of the first slide and the first moving seat respectively, the lower clamp plate is L-shaped, one end of the lower clamp plate is fixedly arranged on the other end of one of the transfer rods, and is located below the first moving seat, an adjustment port is arranged in the middle of the other end of the lower clamp plate, one end of the upper clamp plate is fixedly arranged on another transfer rod, and one end of the upper clamp plate is opposite to one end of the lower clamp plate, one end of the upper clamp plate movably passes through the adjustment port of the lower clamp plate, and the width adjustment bolt is movably screwed in the other end of the upper clamp plate, and passes through the other end of the upper clamp plate.

[0007] Preferably, the limiting unit includes a first transfer arm, a first transfer bolt, an adjustment seat, a first mounting bolt, a clamping frame, a pair of insertion rods, a second mounting bolt and a clamping screw; one end of the first transfer arm is detachably mounted on the upper wall of the left end of the upper clamping plate, a first adjustment groove is provided in the middle of the upper wall of the other end of the first transfer arm, and a second adjustment groove connected to the first adjustment groove is provided on its right side wall, the first transfer bolt movably passes through one end of the first transfer arm and is screwed into the upper clamping plate, the adjustment seat is H-shaped, the adjustment seat movably passes through the first adjustment groove, and the adjustment seat A trapezoidal slot is provided in the middle of the upper and lower side walls, the first mounting bolt movably passes through the second adjustment slot and is screwed into the middle of the adjustment seat, the clamping frame is a concave structure, and the clamping frame can be detachably placed on the adjustment seat, one end of a pair of the insertion rods are symmetrically arranged in the middle of the clamping frame, and the other ends of the insertion rods are movably inserted into the trapezoidal slots of the adjustment seat, the second mounting bolt movably passes through the other end of one of the insertion rods and is screwed into the insertion rod, the pair of the clamping screws are symmetrically screwed on both ends of the clamping frame, and pads are provided at the opposite ends of the clamping screws.

[0008] Preferably, the second clamping structure includes a second clamping unit and a force-applying unit. The second clamping unit has the same structure as the first clamping unit. The second clamping unit is fixedly arranged on another movable platform of the electric slide rail, and the second clamping unit corresponds to the first clamping unit. The force-applying unit can be detachably arranged on the second clamping unit.

[0009] Preferably, the force-applying unit includes a second transfer arm, a second transfer bolt, a second slide, a second motor, a second spiral rod, a second movable seat, an adjusting rod, an adjusting frame, a pair of third mounting bolts, a fourth mounting bolt and a top plate; the second transfer arm is L-shaped, one end of the second transfer arm is detachably mounted on one end of an upper clamping plate in the second clamping unit, the second transfer bolt is the same as the first transfer bolt, and the second transfer bolt is movably passed through one end of the second transfer arm and is screwed into the upper clamping plate, the second slide is a box structure, and a second slide groove is provided in the middle of the upper wall, the lower wall of one end of the second slide is detachably mounted on the other end of the second transfer arm, and is located at the rear side of the second clamping unit, the second motor is fixedly arranged in the middle of the left side wall of the second slide, the second The two ends of the spiral rod are respectively movably embedded in the left and right side walls of the second slide, and one end of the second spiral rod is connected to the second motor driving end, one end of the second movable seat movably passes through the second slide groove and is screwed on the second spiral rod, a width adjustment groove is opened in the middle of the upper wall of the second movable seat, the adjusting rod is movably inserted in the width adjustment groove, the adjusting frame is L-shaped, one end of the adjusting frame is fixedly arranged on the upper wall of the adjusting rod, and a pair of fastening grooves are opened at one end of the adjusting frame and are respectively located on both sides of the adjusting rod, a height adjustment groove is opened in the middle of the other end of the adjusting frame, a pair of the third mounting bolts respectively movably pass through the fastening grooves and are screwed in the upper wall of the second movable seat, the fourth mounting bolt is movably screwed on the side wall of the other end of the adjusting frame and inserted in the height adjustment groove, and the top plate movably passes through the height adjustment groove.

[0010] Preferably, the top plate is located between the first clamping unit and the second clamping unit, and on the left side of the limiting unit.

[0011] Preferably, the cushion seat on the clamping screw can be located between the first clamping unit and the second clamping unit.

[0012] Preferably, the first motor can be driven to drive the first screw rod to rotate in the first slide, so that the first movable seat is forced to move up and down, and the upper clamping plate can be driven to move through the transfer rod.

[0013] The invention provides a fixture for automatic assembly of welding tongs, which has the following beneficial effects:

[0014] 1. The present invention can symmetrically clamp the jaw ends of two handles, which is convenient for installation and fixing.

[0015] 2. For the Z-shaped handle, the other end can be fixed by the lower limit unit to facilitate the relatively stable movement and assembly of the two handles.

[0016] 3. Use the electric slide rail to move the two handles closer together to facilitate the installation of the pin and spring.

[0017] 4. When installing the cable, the force unit can be used to push the gasket into the cable interface of the handle. There is no need for manual hammering and installation, which saves time and effort.

[0018] 5. The equipment can be adjusted according to the actual size of the handle and welding tongs, and has strong versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the assembly structure of the present invention.

[0020] Figure 2 It is a schematic diagram showing the structure of the base of the present invention.

[0021] Figure 3 It is a schematic diagram of the split structure of the first clamping structure of the present invention.

[0022] Figure 4 It is a schematic diagram of the split structure of the second clamping structure of the present invention.

[0023] Figure 5 for Figure 3 Schematic diagram of the assembly structure.

[0024] Figure 6 for Figure 4 Schematic diagram of the assembly structure.

[0025] Figure 7 For the present invention Figure 1 A partial enlarged view of point A in the figure.

[0026] Figure 8 For the present invention Figure 4 A partial enlarged view of point B in FIG.

[0027] Fig. 9 For the present invention Figure 1 A partial enlarged view of point C in the figure.

[0028] In the figure: 1, base; 2, electric slide rail; 3, first clamping structure; 31, first clamping unit; 32, limit unit; 311, first slide; 312, first motor; 313, first screw rod; 314, first moving seat; 315, transfer rod; 316, lower clamping plate; 317, upper clamping plate; 318, width adjustment bolt; 321, first transfer arm; 322, first transfer bolt; 323, adjustment seat; 324, first mounting bolt; 325, clamping Frame; 326, insert rod; 327, second mounting bolt; 328, clamping screw; 4, second clamping structure; 41, second clamping unit; 42, force unit; 421, second transfer arm; 422, second transfer bolt; 423, second slide; 424, second motor; 425, second screw rod; 426, second moving seat; 427, adjustment rod; 428, adjustment frame; 429, third mounting bolt; 430, fourth mounting bolt; 431, top plate. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-9 The present invention provides a technical solution: a fixture for automatic assembly of electric welding tongs, comprising a base 1, an electric slide rail 2, a first clamping structure 3 and a second clamping structure 4; the base 1 is rectangular, the electric slide rail 2 is fixedly arranged at the middle part of the upper wall of the right end of the base 1, and a pair of relatively movable platforms are arranged on the electric slide rail 2, the first clamping structure 3 is fixedly arranged on one of the movable platforms of the electric slide rail 2, and the second clamping structure 4 is fixedly arranged on the other movable platform, the first clamping structure 3 and the second clamping structure 4 can be controlled to move relative to each other through the electric slide rail 2, one of the Z-shaped handles can be clamped and fixed by the first clamping structure 3, and the other handle can be fixed by the second clamping structure 4.

[0031] As a further solution of the present invention, the first clamping structure 3 includes a first clamping unit 31 and a limiting unit 32 . The first clamping unit 31 is fixedly disposed on the moving platform, and the limiting unit 32 is detachably disposed on the first clamping unit 31 .

[0032] As a further solution of the present invention, the first clamping unit 31 includes a first slide 311, a first motor 312, a first screw rod 313, a first movable seat 314, a pair of transfer rods 315, a lower clamping plate 316, an upper clamping plate 317 and a width-adjusting bolt 318; one end of the first slide 311 is fixedly arranged on one of the movable platforms of the electric slide rail 2, and a first slide groove is arranged in the middle of the left side wall of the top of the first slide 311, the first motor 312 is fixedly arranged on the upper wall of the first slide 311, and the driving end movably passes through the upper wall of the first slide groove, the first screw rod 313 is movably embedded in the first slide groove, and one end of the first screw rod 313 is connected to the driving end of the first motor 312, one end of the first movable seat 314 is movably embedded in the first slide groove, and is screwed with the first screw rod 313, one end of a pair of transfer rods 315 are symmetrically arranged on the left side wall of the first slide 311 and the first movable seat 314 respectively, The plate 316 is L-shaped, and one end of the lower clamping plate 316 is fixedly set on the other end of one of the transfer rods 315 and is located below the first movable seat 314. An adjusting hole is set in the middle of the other end of the lower clamping plate 316, and one end of the upper clamping plate 317 is fixedly set on the other transfer rod 315, and one end of the upper clamping plate 317 is opposite to one end of the lower clamping plate 316. One end of the upper clamping plate 317 movably passes through the adjusting hole of the lower clamping plate 316, and the width-adjusting bolt 318 movably screwed into the other end of the upper clamping plate 317 and passes through the other end of the upper clamping plate 317; the first motor 312 drives the first spiral rod 313 to rotate in the first slide 311, causing the first movable seat 314 to descend, so that the upper clamping plate 317 is driven to descend by the transfer rod 315 relative to the lower clamping plate 316 for support use, and the width of the handle clamped by the upper clamping plate 317 and the lower clamping plate 316 can be adjusted by rotating the width-adjusting bolt 318.

[0033] As a further solution of the present invention, the limiting unit 32 includes a first transfer arm 321, a first transfer bolt 322, an adjustment seat 323, a first mounting bolt 324, a clamping frame 325, a pair of insertion rods 326, a second mounting bolt 327 and a clamping screw 328; one end of the first transfer arm 321 is detachably mounted on the upper wall of the left end of the upper clamping plate 317, a first adjustment slot is provided in the middle of the upper wall of the other end of the first transfer arm 321, and a second adjustment slot connected to the first adjustment slot is provided on its right side wall, the first transfer bolt 322 is movably passed through one end of the first transfer arm 321, and is screwed into the upper clamping plate 317, the adjustment seat 323 is H-shaped, the adjustment seat 323 is movably passed through the first adjustment slot, and the middle of the upper and lower side walls of the adjustment seat 323 are both provided with trapezoidal slots, the first mounting bolt 324 is movably passed through the second adjustment slot and is screwed into the middle of the adjustment seat 323, 325 is a concave structure. The clamping frame 325 can be detachably placed on the adjustment seat 323. One end of a pair of insertion rods 326 are symmetrically arranged in the middle of the clamping frame 325, and the other end of the insertion rod 326 is movably inserted into the trapezoidal slot of the adjustment seat 323. The second mounting bolt 327 movably passes through the other end of one of the insertion rods 326 and is screwed with the insertion rod 326. A pair of clamping screws 328 are symmetrically screwed on both ends of the clamping frame 325, and a pad is provided on the opposite end of the clamping screws 328. The first transfer arm 321 can be installed and the angle of the first transfer arm 321 can be adjusted through the first transfer bolt 322. The adjustment seat 323 can slide on the first transfer arm 321 and be fixed by the first mounting bolt 324. The clamping frame 325 is installed on the adjustment seat 323 through the insertion rod 326, and the other end of the handle can be clamped relatively by the clamping screw 328.

[0034] As a further solution of the present invention, the second clamping structure 4 includes a second clamping unit 41 and a force-applying unit 42. The second clamping unit 41 has the same structure as the first clamping unit 31. The second clamping unit 41 is fixedly arranged on another movable platform of the electric slide rail 2, and the second clamping unit 41 corresponds to the first clamping unit 31. The force-applying unit 42 can be detachably arranged on the second clamping unit 41.

[0035] As a further solution of the present invention, the force applying unit 42 includes a second transfer arm 421, a second transfer bolt 422, a second slide 423, a second motor 424, a second screw rod 425, a second moving seat 426, an adjustment rod 427, an adjustment frame 428, a pair of third mounting bolts 429, a fourth mounting bolt 430 and a top plate 431; the second transfer arm 421 is L-shaped, one end of the second transfer arm 421 can be detachably mounted on one end of the upper clamping plate 317 in the second clamping unit 41, and the second transfer bolt 422 and the first transfer bolt 3 22, and the second transfer bolt 422 movably penetrates one end of the second transfer arm 421 and is screwed into the upper clamping plate 317, the second slide 423 is a box structure, and a second slide groove is arranged in the middle of the upper wall, the lower wall of one end of the second slide 423 can be detachably arranged on the other end of the second transfer arm 421, and is located at the rear side of the second clamping unit 41, the second motor 424 is fixedly arranged in the middle of the left side wall of the second slide 423, the two ends of the second screw rod 425 are movably embedded in the left and right side walls of the second slide 423, and one end of the second screw rod 425 is connected to the second clamping unit 41. The driving ends of the two motors 424 are connected, one end of the second movable seat 426 is movably inserted into the second slide slot and is screwed onto the second screw rod 425, a width adjustment slot is provided in the middle of the upper wall of the second movable seat 426, and the adjusting rod 427 is movably inserted into the width adjustment slot, the adjusting frame 428 is L-shaped, one end of the adjusting frame 428 is fixedly arranged on the upper wall of the adjusting rod 427, and a pair of fastening slots are provided at one end of the adjusting frame 428 and are respectively located on both sides of the adjusting rod 427, a height adjustment slot is provided in the middle of the other end of the adjusting frame 428, and a pair of third mounting bolts 429 are movably inserted into the adjusting rod 427, respectively. The fastening groove is screwed into the upper wall of the second movable seat 426, the fourth mounting bolt 430 is movably screwed into the side wall of the other end of the adjusting frame 428 and inserted into the height adjustment groove, and the top plate 431 movably passes through the height adjustment groove; the second slide 423 is fixed by the second transfer arm 421, and the second motor 424 drives the second screw rod 425 to rotate to cause the second movable seat 426 to translate, which can drive the top plate 431 to translate to apply force to the gasket; according to the size of the handle, the corresponding adjustment can be made by moving the adjusting rod 427 back and forth and the top plate 431 up and down.

[0036] As a further solution of the present invention, the top plate 431 is located between the first clamping unit 31 and the second clamping unit 41 and on the left side of the limiting unit 32, and is used to push the gasket into the cable interface of one of the handles.

[0037] As a further solution of the present invention, the cushion seat on the clamping screw 328 can be located between the first clamping unit 31 and the second clamping unit 41 to achieve clamping and fixing of the other end of handles of different sizes according to design requirements.

[0038] The detailed connection means are well-known in the art. The following mainly introduces the working principle and process. The specific work is as follows.

[0039] Through the stable support of the base 1, after the device is powered on, the first clamping unit 31 in the first clamping structure 3 and the second clamping unit 41 in the second clamping structure 4 can be driven respectively to clamp the handles of the two welding tongs respectively;

[0040] That is, by driving the first motor 312 to drive the first screw rod 313 to rotate in the first slide 311, the first movable seat 314 is forced to move up and down, and the upper clamping plate 317 is driven to descend by the transfer rod 315, and then the upper clamping plate 317 and the lower clamping plate 316 are used for holding. At the same time, the width adjustment bolt 318 can be rotated to adjust the width of the handle to prevent the handle from being affected.

[0041] One end of the jaws of the Z-shaped handle can be clamped on the first clamping unit 31, and the other end can be clamped and limited by the limiting unit 32; that is, the installation angle of the first transfer arm 321 is adjusted by the first transfer bolt 322, and the sliding adjustment seat 323 is moved and adjusted in the first transfer arm 321, so that the two clamping screws 328 can be relatively clamped on the other end of the handle; the adjustment seat 323 is tightened and fixed by the first mounting bolt 324, and the clamping frame 325 is installed on the adjustment seat 323 by the insertion rod 326 and can move forward and backward, and the insertion rod 326 is tightened and limited on the adjustment seat 323 by the second mounting bolt 327 to adjust the position of the clamping screw 328;

[0042] When the handles are clamped and fixed, the electric slide rail 2 can be driven to drive the two handles to move relative to each other so that one end of the jaws can be parallelly connected, and the spring can be clamped between the two handles for auxiliary installation. At the same time, after the spring is compressed, it is convenient to assemble the two handles by means of a pin for active connection;

[0043] After the handles are relatively assembled, they will still be in a fixed state. At this time, the cable can be inserted into the cable interface of one handle, and one end of the gasket can be inserted at the same time. Then, the gasket can be inserted into the wiring terminal of the cable with the assistance of the driving force unit 42, and the cable can be compressed with the help of bolts to complete the wiring.

[0044] That is, the second transfer arm 421 installed by the second transfer bolt 422 supports the second slide 423 to be located at the rear side of the second clamping unit 41; the second motor 424 is driven to drive the second screw rod 425 to rotate, so that the second movable seat 426 moves left and right on the second slide 423, and the top plate 431 is driven to push the gasket into the cable interface;

[0045] The relative position of the top plate 431 can be adjusted according to the size of the handle, that is, it can be moved back and forth on the second movable seat 426 by the adjusting rod 427, and the adjusting frame 428 can be moved back and forth on the second movable seat 426 with the help of the adjusting rod 427 and then tightened and fixed by the third mounting bolt 429; the top plate 431 can also be raised and lowered on the adjusting frame 428 to adjust the height, and is fixed with the help of the fourth mounting bolt 430.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fixture for automatic assembly of welding tongs, characterized in that: The electric slide rail (2) comprises a base (1), an electric slide rail (2), a first clamping structure (3) and a second clamping structure (4); the base (1) is rectangular, the electric slide rail (2) is fixedly arranged at the middle of the upper wall at the right end of the base (1), and a pair of relatively movable platforms are arranged on the electric slide rail (2), the first clamping structure (3) is fixedly arranged on one of the movable platforms of the electric slide rail (2), and the second clamping structure (4) is fixedly arranged on the other movable platform; The first clamping structure (3) comprises a first clamping unit (31) and a limiting unit (32), wherein the first clamping unit (31) is fixedly arranged on the moving platform, and the limiting unit (32) is detachably arranged on the first clamping unit (31); The first clamping unit (31) comprises a first sliding frame (311), a first motor (312), a first screw rod (313), a first moving seat (314), a pair of transfer rods (315), a lower clamping plate (316), an upper clamping plate (317), and a width adjustment bolt (318); One end of the first slide (311) is fixedly arranged on one of the moving platforms of the electric slide rail (2), and a first slide groove is arranged in the middle of the left side wall at the top of the first slide (311). The first motor (312) is fixedly arranged on the upper wall of the first slide (311), and the driving end movably penetrates the upper wall of the first slide groove. The first screw rod (313) is movably embedded in the first slide groove, and one end of the first screw rod (313) is connected to the driving end of the first motor (312). One end of the first moving seat (314) is movably embedded in the first slide groove and is rotationally connected to the first screw rod (313). One end of a pair of transfer rods (315) is symmetrically arranged on the left side wall of the first slide (311) and the first On the movable seat (314), the lower clamping plate (316) is L-shaped, one end of the lower clamping plate (316) is fixedly arranged on the other end of one of the transfer rods (315) and is located below the first movable seat (314), an adjustment opening is arranged in the middle of the other end of the lower clamping plate (316), one end of the upper clamping plate (317) is fixedly arranged on the other transfer rod (315), and one end of the upper clamping plate (317) is opposite to one end of the lower clamping plate (316), one end of the upper clamping plate (317) is movably inserted into the adjustment opening of the lower clamping plate (316), and the width adjustment bolt (318) is movably screwed into the other end of the upper clamping plate (317) and penetrates the other end of the upper clamping plate (317); The limiting unit (32) comprises a first transfer arm (321), a first transfer bolt (322), an adjustment seat (323), a first mounting bolt (324), a clamping frame (325), a pair of insertion rods (326), a second mounting bolt (327) and a clamping screw (328); One end of the first transfer arm (321) is detachably mounted on the upper wall of the left end of the upper clamping plate (317); a first adjustment slot is provided in the middle of the upper wall of the other end of the first transfer arm (321); and a second adjustment slot connected to the first adjustment slot is provided on the right side wall; the first transfer bolt (322) is movably passed through one end of the first transfer arm (321) and is screwed into the upper clamping plate (317); the adjustment seat (323) is H-shaped; the adjustment seat (323) is movably passed through the first adjustment slot; and trapezoidal slots are provided in the middle of the upper and lower side walls of the adjustment seat (323); the first mounting bolt (324) is movably passed through the second adjustment slot and is screwed into the adjustment seat (317); In the middle of the joint seat (323), the clamping frame (325) is a concave structure. The clamping frame (325) can be detachably placed on the adjustment seat (323). One ends of a pair of the insertion rods (326) are symmetrically arranged in the middle of the clamping frame (325), and the other ends of the insertion rods (326) are movably inserted into the trapezoidal slots of the adjustment seat (323). The second mounting bolt (327) movably passes through the other end of one of the insertion rods (326) and is screwed to the insertion rod (326). A pair of the clamping screws (328) are symmetrically screwed to the two ends of the clamping frame (325), and a pad is arranged at the opposite end of the clamping screws (328).

2. The fixture for automatic assembly of welding tongs according to claim 1, characterized in that: The second clamping structure (4) comprises a second clamping unit (41) and a force applying unit (42); the second clamping unit (41) has the same structure as the first clamping unit (31); the second clamping unit (41) is fixedly arranged on another movable platform of the electric slide rail (2); and the second clamping unit (41) corresponds to the first clamping unit (31); and the force applying unit (42) is detachably arranged on the second clamping unit (41).

3. The fixture for automatic assembly of welding tongs according to claim 2, characterized in that: The force applying unit (42) comprises a second transfer arm (421), a second transfer bolt (422), a second slide bracket (423), a second motor (424), a second screw rod (425), a second movable seat (426), an adjustment rod (427), an adjustment bracket (428), a pair of third mounting bolts (429), a fourth mounting bolt (430) and a top plate (431); The second transfer arm (421) is L-shaped, one end of the second transfer arm (421) can be detachably mounted on one end of the upper clamping plate (317) in the second clamping unit (41), the second transfer bolt (422) is the same as the first transfer bolt (322), and the second transfer bolt (422) is movably inserted through one end of the second transfer arm (421) and is screwed into the upper clamping plate (317), the second slide (423) is a box structure, and a second slide groove is provided in the middle of the upper wall, one end of the second slide (423) can be detachably mounted on the other end of the second transfer arm (421) and is located at the rear side of the second clamping unit (41), the second motor (424) is fixedly arranged in the middle of the left side wall of the second slide (423), the two ends of the second screw rod (425) are movably embedded in the left and right side walls of the second slide (423), and one end of the second screw rod (425) is connected to the second slide (423). The second movable seat (426) is connected to the driving end of the motor (424), one end of the second movable seat (426) is movably inserted into the second sliding groove and is screwed onto the second spiral rod (425), a width adjustment groove is provided in the middle of the upper wall of the second movable seat (426), and the adjustment rod (427) is movably inserted into the width adjustment groove, the adjustment frame (428) is L-shaped, one end of the adjustment frame (428) is fixedly arranged on the upper wall of the adjustment rod (427), and a pair of fastening grooves are provided at one end of the adjustment frame (428) and are respectively located on both sides of the adjustment rod (427), and a height adjustment groove is provided in the middle of the other end of the adjustment frame (428), a pair of third mounting bolts (429) are respectively movably inserted into the fastening grooves and screwed into the upper wall of the second movable seat (426), the fourth mounting bolt (430) is movably screwed onto the side wall of the other end of the adjustment frame (428) and is inserted into the height adjustment groove, and the top plate (431) is movably inserted into the height adjustment groove.

4. The fixture for automatic assembly of welding tongs according to claim 3, characterized in that: The top plate (431) is located between the first clamping unit (31) and the second clamping unit (41), and is located on the left side of the limiting unit (32).

5. The fixture for automatic assembly of welding tongs according to claim 4, characterized in that: The cushion seat on the clamping screw (328) can be located between the first clamping unit (31) and the second clamping unit (41).

6. The fixture for automatic assembly of welding tongs according to claim 5, characterized in that: By driving the first motor (312), the first screw rod (313) can be driven to rotate in the first slide (311), so that the first movable seat (314) is forced to move up and down, and the upper clamping plate (317) can be driven to move through the transfer rod (315).

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