CN219443805U - High-precision welding device - Google Patents

Abstract

The utility model discloses a high-precision welding device which comprises a workbench, wherein the workbench is connected with a support in a sliding manner along the length direction, a first driving mechanism for driving the support to move is fixedly arranged on the workbench, a connecting piece is connected with the support in a sliding manner along the length direction, a second driving mechanism for driving the connecting piece to move is fixedly arranged on the support, the connecting piece is rotationally connected with a rotating piece, the connecting piece is fixedly connected with a first motor, an output shaft of the first motor is fixedly connected with the rotating piece, one end of the rotating piece, which is away from the connecting piece, is hinged with a connecting plate, the connecting plate is connected with a welding gun in a sliding manner, one end of the connecting plate, which is away from the welding gun, is fixedly connected with a first cylinder, an output end of the first cylinder is fixedly connected with the welding gun, the rotating piece is rotationally connected with a second cylinder, and an output end of the second cylinder is hinged with the connecting plate. This application has the effect that makes the angle of welding rifle can be adjusted, improves welding efficiency.

Description

High-precision welding device

Technical Field

The utility model relates to the technical field of welding devices, in particular to a high-precision welding device.

Background

In the field of modern production and processing, welding is a common machining technique, and metal or other thermoplastic materials are bonded mainly by means of high pressure, high temperature and the like. A common welding tool is a welding gun, and the welding operation is mainly performed in a manual hand-held manner.

The related art can refer to Chinese patent publication No. CN207104079U for a welding device, which comprises a bracket, an upper electrode mechanism, an upper electrode motion mechanism, a lower electrode mechanism, a stroke adjustable mechanism, a pressure sensor and an adjustable constant pressure mechanism. The upper electrode moving mechanism is used for driving the upper electrode mechanism to move up and down. The lower electrode mechanism and the upper electrode mechanism are arranged oppositely in the vertical direction. The lower electrode moving mechanism is used for driving the lower electrode mechanism to move up and down. The stroke-adjustable mechanism controls the positions of the upper electrode mechanism and the lower electrode mechanism. The adjustable constant pressure mechanism is connected with the pressure sensor. The pressure sensor and the digital detector can quantify production parameters based on PC or PLC, improve the laminating accuracy of the upper electrode mechanism and the lower electrode mechanism and have high laminating speed.

Aiming at the related technology, the upper electrode mechanism and the lower electrode mechanism can only move along the vertical direction and cannot adjust the welding angle, when the workpiece structure is complex, and the welding position is on the vertical surface, the placing position of the workpiece needs to be manually adjusted, so that the welding surface is horizontal, the placing position of the workpiece is adjusted to be time-consuming, and the welding efficiency is low.

Disclosure of Invention

In order to enable the angle of the welding gun to be adjusted and improve welding efficiency, the application provides a high-precision welding device.

The application provides a high accuracy welding set adopts following technical scheme:

the utility model provides a high accuracy welding set, includes the workstation, the workstation has the support along length direction sliding connection, the workstation has set firmly the first actuating mechanism that the drive support removed, the support has set firmly the second actuating mechanism that the drive connecting piece removed along length direction sliding connection, the connecting piece rotates and is connected with the rotating member, the first motor of connecting piece fixedly connected with, first motor output shaft and rotating member fixed connection, the one end that the rotating member deviates from the connecting piece articulates there is the connecting plate, connecting plate sliding connection has the welding gun, the one end fixedly connected with first cylinder that the connecting plate deviates from the welding gun, first cylinder output and welding gun fixed connection, the rotating member rotates and is connected with the second cylinder, second cylinder output is articulated with the connecting plate.

Through adopting above-mentioned technical scheme, first actuating mechanism drives the support and removes along workstation length direction, and second actuating mechanism drives the connecting piece and removes along support length direction, and then can adjust the relative position of welding gun on the horizontal plane. Under the supporting effect of the connecting plate, the output end of the first air cylinder can drive the welding gun to move along the vertical direction. The first motor output shaft can drive the rotating piece to rotate when rotating, so that the welding gun can be driven to rotate along the plane of the width direction of the workbench; when the output end of the second cylinder moves, the connecting plate is driven to rotate around the hinge, so that the welding gun is driven to rotate along the plane of the length direction of the workbench, the angle between the welding gun and the workbench is adjusted when the welding gun rotates, welding points on different planes of a welding workpiece are convenient to weld, the position of the workpiece is not required to be manually adjusted, and the welding efficiency is improved.

Optionally, the support includes the crossbearer and with perpendicular to the support frame at crossbearer both ends, the equal fixedly connected with slider of tip under the crossbearer, two spouts with the slider adaptation have been seted up to the workstation, first actuating mechanism includes second motor and threaded rod, second motor and workstation fixed connection, the threaded rod rotates to be connected in the spout that the support is close to the second motor, second motor output shaft and threaded rod fixed connection, the threaded rod wears to establish the slider in the corresponding spout and rather than threaded connection.

Through adopting above-mentioned technical scheme, drive the threaded rod and rotate when the second motor output shaft rotates, under the limiting displacement of spout to the slider, will promote the slider and remove along threaded rod length direction when the threaded rod rotates for support frame and crossbearer can follow workstation length direction and remove, and the removal process is driven through the second motor, and the manual operation of being convenient for has improved the accuracy nature of welding rifle removal position.

Optionally, the cross frame has set firmly the guide arm along length direction, and the connecting piece has set firmly the go-between with the guide arm adaptation, and second actuating mechanism includes third motor, straight-tooth wheel and rack, and third motor fixed connection is in connecting piece upper end, and straight-tooth wheel and third motor output shaft fixed connection, rack fixed connection are in the cross frame to the rack meshes with the straight-tooth wheel mutually.

Through adopting above-mentioned technical scheme, under the restriction effect of guide arm to the go-between, the connecting piece can be along the length direction removal of guide arm, and the meshing through gear and rack is connected and is driven the connecting piece and remove along crossbearer length direction when the third motor output shaft rotates, and then makes the welding rifle follow workstation width direction's relative position and can adjust to carry out through the third motor during the adjustment, be favorable to improving the position accuracy when removing.

Optionally, the terminal surface is equipped with the arcwall face under the rotating member, and the connecting piece has set firmly the arc with the arcwall face adaptation, rotates the piece and contradicts with the arc to rotate the piece and rotate with the arc and be connected.

Through adopting above-mentioned technical scheme, rotate the piece and contradict with the arc for the arc supports the arc piece, is favorable to reducing the bearing of first motor output shaft, improves the life of first motor.

Optionally, an annular groove is formed in one end, close to the connecting piece, of the rotating piece, an annular piece matched with the annular groove is fixedly arranged on the connecting piece, and the annular piece is connected in the annular groove in a sliding mode.

Through adopting above-mentioned technical scheme, annular piece and annular channel inner wall laminating, and then the annular piece can support the rotation piece for can be more stable when rotating the piece and rotate, be favorable to improving the stability when welding gun rotates.

Optionally, the one end fixedly connected with that the rotating member deviates from the connecting piece is parallel to each other semicircular plate, and the semicircular plate back of the body has all seted up the arc wall from the one end of connecting piece, connecting plate fixedly connected with and the backup pad of semicircular block adaptation, backup pad fixedly connected with and the movable block of arc wall adaptation.

Through adopting above-mentioned technical scheme, backup pad contradicts with the semicircle board, and then provides the support for the connecting plate when the connecting plate rotates, and the movable block is located corresponding arc inslot simultaneously to movable block and arc inslot laminating, and then the arc inslot carries out spacingly to the movable block, makes the movable block can slide along the arc inslot, has further improved the stability when the welding gun rotates.

Optionally, vertical groove has been seted up along vertical direction to the connecting plate, is equipped with the limiting plate in the vertical groove, and tip and connecting plate fixed connection under the limiting plate, welding rifle fixedly connected with and the rectangular pipe of limiting plate adaptation, the limiting plate wears to establish rectangular pipe and laminating with rectangular pipe, and the connecting block has set firmly to welding rifle upper end, first cylinder output and connecting block fixed connection.

Through adopting above-mentioned technical scheme, rectangular pipe and limiting plate cooperation limit the welding gun for the welding gun can slide along perpendicular groove vertical direction, and perpendicular groove can hold the rectangular pipe, makes the welding gun and can laminate with the connecting plate and can not receive the interference of rectangular pipe, and first cylinder goes up and down to remove through the promotion welding gun of connecting piece, makes the welding gun be close to or keep away from the workstation.

Optionally, the workstation fixedly connected with slide bar, the slide bar is located the spout that keeps away from the second motor, and the slide bar wears to establish the slider in the corresponding spout and with its sliding connection.

Through adopting above-mentioned technical scheme, the slide bar is spacing to the slider, and then makes the crossbearer can be more stable when removing.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the first driving mechanism drives the support to move along the length direction of the workbench, and the second driving mechanism drives the connecting piece to move along the length direction of the support, so that the relative position of the welding gun on the horizontal plane can be adjusted. Under the supporting effect of the connecting plate, the output end of the first air cylinder can drive the welding gun to move along the vertical direction. The first motor output shaft can drive the rotating piece to rotate when rotating, so that the welding gun can be driven to rotate along the plane of the width direction of the workbench; when the output end of the second cylinder moves, the connecting plate is driven to rotate around the hinge joint, so that the welding gun is driven to rotate along the plane of the length direction of the workbench, the angle between the welding gun and the workbench is adjusted when the welding gun rotates, welding points on different planes of a workpiece are conveniently welded, the position of the workpiece is not required to be manually adjusted, and the welding efficiency is improved;

2. the second motor output shaft drives the threaded rod to rotate when rotating, under the limit effect of the sliding groove on the sliding block, the sliding block is pushed to move along the length direction of the threaded rod when rotating, so that the support frame and the transverse frame can move along the length direction of the workbench, the moving process is driven by the second motor, manual operation is facilitated, and the accuracy of the moving position of the welding gun is improved;

3. under the restriction effect of guide arm to the go-between, the connecting piece can be along the length direction removal of guide arm, and the meshing through gear and rack is connected when the third motor output shaft rotates drives the connecting piece and removes along crossbearer length direction, and then makes the welding rifle follow workstation width direction's relative position can be adjusted to carry out through the third motor during the adjustment, be favorable to improving the position accuracy when removing.

Drawings

Fig. 1 is a schematic view of the overall structure of a high-precision welding apparatus.

Fig. 2 is a schematic view intended to highlight the connection of the connector to the bracket.

Fig. 3 is a schematic view intended to highlight the connection of the rotor to the connection plate.

Fig. 4 is an enlarged schematic view of the portion a in fig. 3.

Fig. 5 is an enlarged schematic view of a portion B in fig. 3.

Fig. 6 is a schematic view intended to highlight the structure of the welding gun.

Reference numerals illustrate: 1. a work table; 2. a bracket; 11. a first driving mechanism; 21. a second driving mechanism; 3. a connecting piece; 31. a rotating member; 32. a first motor; 33. a connecting plate; 34. a welding gun; 35. a first cylinder; 36. a second cylinder; 22. a cross frame; 23. a support frame; 231. a slide block; 12. a chute; 111. a second motor; 112. a threaded rod; 221. a guide rod; 37. a connecting ring; 211. a third motor; 212. spur gears; 213. a rack; 38. an arc-shaped plate; 311. an annular groove; 310. a ring member; 312. a semicircular plate; 331. a support plate; 313. an arc-shaped groove; 332. a moving block; 333. a vertical groove; 334. a limiting plate; 341. a connecting block; 342. a rectangular tube; 115. and a slide bar.

Description of the embodiments

The present application is described in further detail below with reference to the accompanying drawings.

The embodiment of the application discloses a high-precision welding device.

Referring to fig. 1, a high-precision welding device comprises a workbench 1, an operator places a workpiece to be welded on the workbench 1, a support 2 is slidably connected to the upper end surface of the workbench 1 along the length direction, the support 2 comprises a transverse frame 22 and two support frames 23, and the two support frames 23 are fixedly connected to two ends of the transverse frame 22 respectively. The support frame 23 is kept away from the one end of crossbearer 22 and all is fixed with slider 231, and workstation 1 has seted up the spout 12 with slider 231 looks adaptation, and slider 231 is located corresponding spout 12 to laminate with spout 12 inner wall. The bracket 2 can slide along the length direction of the slide groove 12 under the limit action of the slide groove 12 on the slide block 231.

Referring to fig. 1, the table 1 is fixed with a first driving mechanism 11, the first driving mechanism 11 includes a second motor 111 and a threaded rod 112, the second motor 111 is fixedly connected to one side of the table 1 in the length direction, and an output shaft of the second motor 111 is on the same axis as the chute 12. The threaded rod 112 is rotatably connected in a groove of the workbench 1 close to the second motor 111, an output shaft of the second motor 111 is fixedly connected with the threaded rod 112, and an operator can drive the threaded rod 112 to rotate by operating the rotation of the output shaft of the second motor 111.

Referring to fig. 1 and 2, the threaded rod 112 passes through the sliding block 231 and is in threaded connection with the sliding block 231, and under the limiting effect of the sliding groove 12 on the sliding block 231, the sliding block 231 can be pushed to move when the threaded rod 112 rotates, and then the transverse frame 22 is driven to move by the two supporting frames 23. The sliding rods 115 are fixedly connected in the sliding grooves 12 far away from the threaded rods 112, the sliding rods 115 penetrate through the sliding blocks 231 in the corresponding sliding grooves 12 and are in sliding connection with the sliding blocks, the stability of the transverse frame 22 during movement is improved through the limiting effect of the sliding rods 115 on the sliding blocks 231, and an operator can drive the transverse frame 22 to move through the second motor 111.

Referring to fig. 2 and 3, the cross frame 22 is slidably connected with the connecting member 3, the cross frame 22 is fixed with a guide rod 221 along the length direction, the connecting member 3 is fixed with a connecting ring 37 adapted to the guide rod 221, the guide rod 221 penetrates through the connecting ring 37 and is attached to the connecting ring 37, and the connecting member 3 can move along the length direction of the cross frame 22 under the limiting action of the guide rod 221 on the connecting ring 37.

Referring to fig. 2 and 3, the cross frame 22 is provided with a second driving mechanism 21, the second driving mechanism 21 includes a third motor 211, a spur gear 212 and a rack 213, the third motor 211 is fixedly connected to the upper end portion of the connecting piece 3, the spur gear 212 is fixedly connected with an output shaft of the third motor 211, the spur gear 212 is driven to rotate when the output shaft of the third motor 211 rotates, the rack 213 is fixedly connected with the cross frame 22, and the rack 213 is meshed with the spur gear 212, so that an operator can drive the connecting piece 3 to move along the length direction of the cross frame 22 through the rotation of the output shaft of the third motor 211.

Referring to fig. 2 and 4, the connecting piece 3 is fixedly connected with a first motor 32, one end of the connecting piece 3, which is away from the transverse frame 22, is rotatably connected with a rotating piece 31, the output end of the first motor 32 is fixedly connected with the rotating piece 31, and an operator can operate the first motor 32 to drive the rotating piece 31 to rotate. The end of the rotating member 31 facing away from the connecting member 3 is hinged with a connecting plate 33, and the connecting plate 33 can rotate around the hinge.

Referring to fig. 5 and 6, the connection plate 33 (refer to fig. 3) is provided with a vertical groove 333, a limiting plate 334 is fixed in the vertical groove 333, and a gap is reserved between the inner walls of the vertical groove 333 of the limiting plate 334. The connecting plate 33 (see fig. 3) is connected with a welding gun 34 (see fig. 3), the welding gun 34 (see fig. 3) is fixed with a rectangular pipe 342 adapted to the vertical groove 333, a through hole adapted to the limiting plate 334 is formed in the rectangular pipe 342, and the limiting plate 334 penetrates through the through hole and is attached to the rectangular pipe 342. The welding gun 34 (see fig. 3) can move in the vertical direction under the limiting action of the limiting plate 334 and the rectangular tube 342.

Referring to fig. 2 and 3, a first cylinder 35 is fixed at one end of the connecting plate 33 facing away from the welding gun 34, the output end of the first cylinder 35 is vertically upward, a connecting block 341 is fixed at the upper end of the welding gun 34, and the output end of the first cylinder 35 is fixedly connected with the connecting block 341. The operator can operate through first cylinder 35 and promote welding rifle 34 and go up and down, and then adjusts the distance between welding rifle 34 and the work piece, and first cylinder 35 output upwards sets up simultaneously, is favorable to reducing first cylinder 35 output and receives the probability that the work piece interfered when removing.

Referring to fig. 2 and 3, the upper end of the rotating member 31 is rotatably connected with a second cylinder 36, the connecting plate 33 is hinged with the output end of the second cylinder 36, and an operator can drive the connecting plate 33 to rotate by manipulating the movement of the output end of the second cylinder 36, so as to drive the welding gun 34 to form an angle along the length direction plane of the workbench 1; meanwhile, an operator can drive the rotating piece 31 to rotate through the first motor 32, and then drive the welding gun 34 to form an angle along the width direction plane of the workbench 1.

Referring to fig. 1 and 2, an operator can drive the cross frame 22 and the connecting piece 3 to move by controlling the second motor 111 and the third motor 211, so as to adjust the position of the welding gun 34 in the horizontal direction, and the adjustment process is performed by the control system without manual movement, thereby being beneficial to ensuring the accuracy of displacement when the welding gun 34 moves.

Referring to fig. 2 and 3, an operator can drive the welding gun 34 to rotate through the first motor 32 and the second air cylinder 36, so that the included angle of the welding gun 34 relative to the horizontal plane can be adjusted, the welding gun 34 can weld different planes on a workpiece, and the operator does not need to adjust the placing position of the workpiece when welding the workpiece, so that the adjustment time is shortened, and the welding efficiency is improved.

Referring to fig. 2 and 3, the lower end of the rotating member 31 is provided with an arc surface, one end of the connecting member 3 facing away from the transverse frame 22 is fixed with an arc plate 38 adapted to the arc surface, the arc surface is attached to the arc plate 38, and the rotating block can rotate around the center of the arc surface. The arc-shaped plate 38 supports the rotating member 31, so that the gravity borne by the output shaft of the first motor 32 is dispersed, and the service life of the output shaft of the first motor 32 is prolonged.

Referring to fig. 2 and 3, an annular groove 311 is formed in one end, close to the connecting piece 3, of the rotating piece 31, the annular groove 311 is concentrically arranged with the output shaft of the first motor 32, the connecting piece 3 is fixed with an annular piece 310, the annular piece 310 is located in the annular groove 311 and is attached to the rotating piece 31, and under the limiting effect of the annular groove 311 on the annular piece 310, the rotating piece 31 can be more stable during rotation, and stability during rotation of the welding gun 34 is further improved.

Referring to fig. 3 and 5, one end of the rotating member 31 facing away from the connecting member 3 is fixedly connected with two semicircular plates 312, the two semicircular plates 312 are parallel to each other, the connecting plate 33 is fixed with two supporting plates 331, the supporting plates 331 are provided with grooves, the grooves are matched with the semicircular plates 312, and when the connecting plate 33 rotates, the semicircular plates 312 are located in the corresponding grooves, and then the connecting plate 33 is supported through the semicircular plates 312.

Referring to fig. 3 and 5, an arc groove 313 is formed at one end of the semicircular plate 312, which is away from the moving block 332, and a moving block 332 adapted to the arc groove 313 is fixed to the supporting plate 331, and the moving block 332 is located in the corresponding arc groove 313 and is attached to the inner wall of the arc groove 313. When the connecting plate 33 rotates, the moving block 332 can move along the arc-shaped groove 313, so that the stability of the welding gun 34 during rotation is further improved.

The implementation principle of the high-precision welding device provided by the embodiment of the application is as follows: the operator manipulates the second motor 111 to drive the threaded rod 112 to rotate, and the threaded rod 112 drives the bracket 2 to move when rotating, so as to adjust the relative position of the welding gun 34 in the length direction of the workbench 1. The operator controls the third motor 211 to drive the connecting piece 3 to move along the length direction of the transverse frame 22 through the meshing transmission of the spur gear 212 and the rack 213, so as to adjust the relative position of the welding gun 34 in the width direction of the workbench 1. The output end of the first air cylinder 35 drives the welding gun 34 to move in the vertical direction, and the output shaft of the first motor 32 drives the rotating block to rotate, so that the welding gun 34 is driven to rotate along the plane in the width direction of the workbench 1; the output end of the second air cylinder 36 drives the connecting plate 33 to rotate, so that the welding gun 34 is driven to rotate along the plane of the length direction of the workbench 1, an operator can adjust the angle between the welding gun 34 and the workbench 1, welding points on different planes of a welding workpiece are convenient to weld, the position of the workpiece is not required to be manually adjusted, and the welding efficiency is improved.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (8)

1. The utility model provides a high accuracy welding set, includes workstation (1), its characterized in that: the workbench (1) is connected with the support (2) in a sliding manner along the length direction, the workbench (1) is fixedly provided with the first driving mechanism (11) for driving the support (2) to move, the support (2) is fixedly provided with the connecting piece (3) along the length direction, the support (2) is fixedly provided with the second driving mechanism (21) for driving the connecting piece (3) to move, the connecting piece (3) is rotationally connected with the rotating piece (31), the connecting piece (3) is fixedly connected with the first motor (32), the output shaft of the first motor (32) is fixedly connected with the rotating piece (31), one end of the rotating piece (31) is hinged with the connecting plate (33), the connecting plate (33) is connected with the welding gun (34) in a sliding manner, one end of the connecting plate (33) is fixedly connected with the first cylinder (35) which is deviated from the welding gun (34), the output end of the first cylinder (35) is fixedly connected with the welding gun (34), the rotating piece (31) is rotationally connected with the second cylinder (36), and the output end of the second cylinder (36) is hinged with the connecting plate (33).

2. A high precision welding apparatus according to claim 1, wherein: the support (2) comprises a transverse frame (22) and support frames (23) which are vertically fixed at two ends of the transverse frame (22), sliding blocks (231) are fixedly connected to the lower end portions of the transverse frame (22), two sliding grooves (12) which are matched with the sliding blocks (231) are formed in the workbench (1), the first driving mechanism (11) comprises a second motor (111) and a threaded rod (112), the second motor (111) is fixedly connected with the workbench (1), the threaded rod (112) is rotationally connected in the sliding grooves (12) of the support (2) close to the second motor (111), the output shafts of the second motor (111) are fixedly connected with the threaded rods (112), and the threaded rods (112) penetrate through the sliding blocks (231) in the corresponding sliding grooves (12) and are in threaded connection with the sliding blocks.

3. A high precision welding apparatus according to claim 2, wherein: the transverse frame (22) is fixedly provided with a guide rod (221) along the length direction, the connecting piece (3) is fixedly provided with a connecting ring (37) matched with the guide rod (221), the second driving mechanism (21) comprises a third motor (211), a spur gear (212) and a rack (213), the third motor (211) is fixedly connected to the upper end part of the connecting piece (3), the spur gear (212) is fixedly connected with an output shaft of the third motor (211), the rack (213) is fixedly connected to the transverse frame (22), and the rack (213) is meshed with the spur gear (212).

4. A high precision welding apparatus according to claim 1, wherein: the lower end face of the rotating piece (31) is provided with an arc-shaped face, the connecting piece (3) is fixedly provided with an arc-shaped plate (38) matched with the arc-shaped face, the rotating piece (31) is in interference with the arc-shaped plate (38), and the rotating piece (31) is rotationally connected with the arc-shaped plate (38).

5. A high precision welding apparatus according to claim 1, wherein: an annular groove (311) is formed in one end, close to the connecting piece (3), of the rotating piece (31), an annular piece (310) matched with the annular groove (311) is fixedly arranged on the connecting piece (3), and the annular piece (310) is connected in the annular groove (311) in a sliding mode.

6. A high precision welding apparatus according to claim 1, wherein: one end that rotates piece (31) deviating from connecting piece (3) fixedly connected with two semicircle boards (312) that are parallel to each other, arc wall (313) have all been seted up to the one end that semicircle board (312) deviate from connecting piece (3), connecting plate (33) fixedly connected with and semicircle piece adaptation backup pad (331), backup pad (331) fixedly connected with and arc wall (313) adaptation movable block (332).

7. A high precision welding apparatus according to claim 1, wherein: vertical groove (333) has been seted up along vertical direction to connecting plate (33), be equipped with limiting plate (334) in vertical groove (333), limiting plate (334) lower extreme and connecting plate (33) fixed connection, welding rifle (34) fixedly connected with and rectangular pipe (342) of limiting plate (334) adaptation, limiting plate (334) wear to establish rectangular pipe (342) and laminate with rectangular pipe (342), welding rifle (34) upper end has set firmly connecting block (341), first cylinder (35) output and connecting block (341) fixed connection.

8. A high precision welding apparatus according to claim 2, wherein: the workbench (1) is fixedly connected with a sliding rod (115), the sliding rod (115) is positioned in the sliding groove (12) far away from the second motor (111), and the sliding rod (115) penetrates through a sliding block (231) in the corresponding sliding groove (12) and is in sliding connection with the sliding block.