Collaborative welding device for automobile part welding

Abstract

The invention discloses a collaborative welding device for automobile part welding, and relates to the field of automobile part machining, the collaborative welding device comprises a bearing plate, a supporting frame is fixedly mounted at the edge of the bearing plate, auxiliary welding mechanisms are slidably mounted at the top of the supporting frame, and a main welding mechanism is fixedly connected between the two auxiliary welding mechanisms; the auxiliary welding mechanism comprises a first positioning plate, a supporting table and a clamping block. The two auxiliary welding mechanisms slidably mounted on the edge supporting frame of the bearing plate and the main welding mechanism form a collaborative operation unit, the auxiliary welding mechanisms drive a worm and gear transmission assembly through a servo motor to drive angle adjustment of a supporting arm, and in cooperation with horizontal sliding of a supporting table, a second welding gun can achieve multi-directional posture adaptation, and the welding efficiency is improved. The main welding mechanism and the two auxiliary welding mechanisms are in synchronous linkage, a multi-welding-gun collaborative welding mode is formed, the problems that the welding track of a single welding gun is not coherent and the connection precision is low are effectively solved, and meanwhile the welding operation efficiency is greatly improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of automobile part machining, in particular to a collaborative welding device for automobile part welding. BACKGROUND

[0002] With the development of the automobile industry in the direction of high precision and light weight, the structural complexity of automobile parts is continuously improved, and higher requirements are put forward for the collaborative working ability and machining precision of the welding device. As a core process in the production of automobile parts, the quality of welding directly affects the safety and reliability of the whole vehicle. Therefore, the welding device needs to realize precise and continuous welding operation to ensure that the joint strength of each welding part is uniform and consistent.

[0003] However, in the prior art, the existing automobile part welding device adopts a single welding gun structure, which can only realize welding operation in a single direction and at a single position. For parts with complex structures that need to be welded from multiple directions, the workpiece position or welding gun posture often needs to be adjusted multiple times to complete the entire welding process, resulting in poor welding continuity, insufficient connection precision of each welding part, and low efficiency of single welding gun operation, which cannot meet the high requirements of automobile parts for welding consistency and joint strength. SUMMARY

[0004] The purpose of the present application is to provide a collaborative welding device for automobile part welding to solve the problems of poor welding continuity, insufficient connection precision and low operation efficiency caused by single welding gun operation of the welding device as described in the background.

[0005] To achieve the above purpose, the present application provides the following technical scheme: a collaborative welding device for automobile part welding, comprising a bearing plate, a support frame is fixedly installed at the edge of the bearing plate, an auxiliary welding mechanism is slidingly installed at the top of the support frame, a main welding mechanism is fixedly connected between the two auxiliary welding mechanisms, the auxiliary welding mechanism comprises a first positioning plate, a support table and a clamping block, the support table is slidingly installed at the top of the support frame, the first positioning plate is fixedly installed on the upper surface of the support table, one end of the first positioning plate is close to the support table, the clamping block is inserted into the top of the first positioning plate, a servo motor is installed in the clamping block, a support arm is rotatably installed on one side of the clamping block, the end of the support arm and the output end of the servo motor are connected through a worm and gear transmission assembly, wherein the worm is fixedly connected with the output end of the servo motor, a mounting connecting block is fixedly installed at the other end of the support arm, the mounting connecting block is perpendicular to the support arm, and a second welding gun is fixedly installed at the end of the mounting connecting block.

[0006] Preferably, the outer wall of the servo motor is fixedly provided with a positioning sheet, a gap with a thickness matching the first positioning plate is left between the positioning sheet and the clamping block, and the positioning sheet and the first positioning plate are connected through bolts.

[0007] Preferably, the main welding mechanism comprises a horizontal crossbar, the ends of the horizontal crossbar are arranged on the upper surface of the support table, the upper surface of the support table is fixedly provided with a second positioning plate, the second positioning plate is located at the other end of the support table, and the side of the second positioning plate is attached to the horizontal crossbar.

[0008] Preferably, the side of the support frame is fixedly provided with a first motor screw rod transmission assembly, the upper surface of the support frame is fixedly provided with a limiting guide rail, the side of the support table is fixedly provided with a connecting side plate, the bottom end of the connecting side plate is threadedly connected with the screw rod of the first motor screw rod transmission assembly, and the bottom of the first positioning plate is slidably connected with the limiting guide rail through a sliding block.

[0009] Preferably, the upper surface of the horizontal crossbar is fixedly provided with a second motor screw rod transmission assembly, the second motor screw rod transmission assembly is arranged along the length direction of the horizontal crossbar, the second motor screw rod transmission assembly is perpendicular to the first motor screw rod transmission assembly, and the outer wall of the screw rod of the second motor screw rod transmission assembly is threadedly connected with a hollow frame.

[0010] Preferably, the inside of the hollow frame is fixedly provided with a third motor screw rod transmission assembly, the third motor screw rod transmission assembly is arranged in a vertical state, the outer wall of the screw rod of the third motor screw rod transmission assembly is threadedly connected with a first welding gun, and the first welding gun is located between the two second welding guns.

[0011] Preferably, the lower surface of the bearing plate is fixedly provided with a plurality of partition pad rods at equal intervals, the inside of the bearing plate is provided with a through hole, the first welding gun and the second welding gun are located above the bearing plate, and the first welding gun and the second welding gun are arranged in an inverted triangular mode.

[0012] Preferably, the inside of the support frame is fixedly provided with an electric cylinder, the electric cylinder is located on the upper surface of the bearing plate, and the electric cylinder is located at the edge of the bearing plate, and the two electric cylinders are symmetrically arranged.

[0013] Preferably, a contact frame is fixedly connected between the piston rods of the two electric cylinders, and the contact frame is movably arranged on the upper surface of the bearing plate.

[0014] Compared with the prior art, the present application has the following beneficial effects: 1. In the application, the two auxiliary welding mechanisms slidingly installed through the edge support frame of the bearing plate form a cooperative work unit with the main welding mechanism, the auxiliary welding mechanism drives the support arm angle adjustment through the servo motor driven worm gear transmission assembly, cooperates with the horizontal sliding of the support table, so that the second welding gun can realize multi-attitude adaptation, the main welding mechanism and the two auxiliary welding mechanisms are synchronously linked to form a multi-welding gun cooperative welding mode, effectively solving the problems of single welding gun welding track incoherence and low connection precision, and greatly improving the welding operation efficiency.

[0015] 2. In the application, the stable positioning of the servo motor is realized through the bolt connection of the positioning sheet and the first positioning plate, the movement and adjustment of each welding mechanism have high-precision transmission characteristics through the cooperation of the first, second and third motor screw transmission assemblies and the limiting guide rail, the position and angle control of the welding gun are accurate, the consistency and strength of the automobile part welded joint are significantly improved, and the high-precision machining demand is met.

[0016] 3. In the application, the support structure on the lower surface of the bearing plate and the contact frame driven by the electric cylinder form a stable workpiece support and clamping system, and cooperate with the through hole of the bearing plate to realize heat dissipation, the overall structure design of the device considers stability and adaptability, can flexibly adapt to the welding requirements of automobile parts of different specifications and complex structures, reduces the equipment replacement and adjustment cost, and improves the universality of the device. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural schematic view of a cooperative welding device for automobile part welding of the application; Figure 2 It is a top view of a cooperative welding device for automobile part welding of the application; Figure 3 It is a bearing plate and contact frame three-dimensional structure schematic view of a cooperative welding device for automobile part welding of the application; Figure 4 It is a side view of an auxiliary welding mechanism and a main welding mechanism of a cooperative welding device for automobile part welding of the application; Figure 5 It is a front view of an auxiliary welding mechanism and a main welding mechanism of a cooperative welding device for automobile part welding of the application; Figure 6 It is an auxiliary welding mechanism structure disassembly schematic view of a cooperative welding device for automobile part welding of the application.

[0018] As shown in the figure: 1, the bearing plate; 2, the support frame; 3, the spacer pad rod; 4, the first motor screw rod transmission assembly; 5, the auxiliary welding mechanism; 6, the main welding mechanism; 7, the limit guide rail; 8, the electric cylinder; 9, the contact frame; 10, the through hole; 51, the first positioning plate; 52, the support table; 53, the clamping block; 54, the servo motor; 55, the support arm; 56, the mounting connecting block; 57, the second welding torch; 58, the link side plate; 59, the positioning piece; 510, the second positioning plate; 61, the horizontal cross bar; 62, the second motor screw rod transmission assembly; 63, the hollow frame; 64, the third motor screw rod transmission assembly; 65, the first welding torch. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0020] Embodiment one: refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown in the figure: a collaborative welding device for welding automobile parts, comprising a bearing plate 1, a support frame 2 is fixedly installed at the edge of the bearing plate 1, an auxiliary welding mechanism 5 is slidingly installed at the top of the support frame 2, a main welding mechanism 6 is fixedly connected between the two auxiliary welding mechanisms 5, the auxiliary welding mechanism 5 comprises a first positioning plate 51, a support table 52 and a clamping block 53, the support table 52 is slidingly installed at the top of the support frame 2, the first positioning plate 51 is fixedly installed on the upper surface of the support table 52, the first positioning plate 51 is close to one end of the support table 52, the clamping block 53 is inserted into the top of the first positioning plate 51, the servo motor 54 is installed in the clamping block 53, the support arm 55 is rotatably installed on one side of the clamping block 53, the support arm 55 is connected between the end of the support arm 55 and the output end of the servo motor 54 through a worm and gear transmission assembly, wherein the worm is fixedly connected with the output end of the servo motor 54, the mounting connecting block 56 is fixedly installed at the other end of the support arm 55, the mounting connecting block 56 is perpendicular to the support arm 55, and the second welding torch 57 is fixedly installed at the end of the mounting connecting block 56.

[0021] In this embodiment, the bearing plate 1 is used as the basic support component, the support frame 2 fixed at the edge of the bearing plate 1 provides the mounting carrier for the overall welding mechanism, the auxiliary welding mechanism 5 slidingly mounted on the top of the support frame 2 forms a cooperative work unit with the main welding mechanism 6, in the auxiliary welding mechanism 5, the support table 52 is the moving basis in the front and back directions of the welding work, the first positioning plate 51 is fixed on the upper surface of the support table 52, the clamping block 53 inserted on the top of the first positioning plate 51 provides the mounting reference for the servo motor 54 and the support arm 55, the servo motor 54 installed inside the clamping block 53 is used as the power source, the power is transmitted to the support arm 55 rotatingly installed on one side of the clamping block 53 through the fixed connection between the worm of the worm and gear transmission assembly and the output end of the servo motor 54, so as to drive the support arm 55 to realize the angle adjustment, the mounting connecting block 56 fixed on the other end of the support arm 55 is perpendicular to the support arm 55, and is used for fixing the second welding gun 57, so that the second welding gun 57 can realize multi-directional welding position adaptation with the angle adjustment of the support arm 55 and the horizontal sliding of the support table 52, the main welding mechanism 6 is fixedly connected with the two auxiliary welding mechanisms 5, so as to ensure that the auxiliary welding mechanism 5 is always near the main welding mechanism 6 in the overall close to synchronous displacement state, thereby ensuring the synchronism of welding, the plug-in fit between the first positioning plate 51 of the auxiliary welding mechanism 5 and the clamping block 53 realizes the quick assembly and positioning of the servo motor 54, the support arm 55 and other components, which is convenient for later maintenance and adjustment, the servo motor 54 drives the support arm 55 to rotate through the worm and gear transmission assembly, the transmission precision is high, the torque is large, the angle of the second welding gun 57 can be accurately controlled, the accuracy of the welding joint is ensured, and the welding demand of complex automobile parts is applicable, the overall can avoid the problem of low efficiency when a single welding gun works, different welding parts of the parts can be worked at the same time, the welding efficiency is greatly improved, the stability and accuracy in the welding process are ensured, the versatility and adaptability of the device are improved, the welding demand of various automobile parts can be met, the adjustment cost in the production process is effectively reduced, and the consistency and qualification rate of the welded products are improved.

[0022] Embodiment two: according to Figure 5 and Figure 6As shown, the outer wall of the servo motor 54 is fixedly installed with a positioning sheet 59, a gap with a thickness adapted to the first positioning plate 51 is left between the positioning sheet 59 and the clamping block 53, the positioning sheet 59 and the first positioning plate 51 are connected through bolts, the main welding mechanism 6 comprises a horizontal cross bar 61, the end of the horizontal cross bar 61 is erected on the upper surface of the support table 52, the upper surface of the support table 52 is fixedly installed with a second positioning plate 510, the second positioning plate 510 is located at the other end of the support table 52, one side of the second positioning plate 510 is in close contact with the horizontal cross bar 61, one side of the support frame 2 is fixedly installed with the first motor lead screw transmission assembly 4, the upper surface of the support frame 2 is fixedly installed with a limiting guide rail 7, one side of the support table 52 is fixedly installed with a connecting side plate 58, the bottom end of the connecting side plate 58 is threadedly connected with the lead screw of the first motor lead screw transmission assembly 4, and the bottom of the first positioning plate 51 is slidably connected with the limiting guide rail 7 through a sliding block.

[0023] In the embodiment, a gap with a thickness adapted to the first positioning plate 51 is left between the positioning sheet 59 and the clamping block 53, the positioning sheet 59 and the first positioning plate 51 are fastened through bolts, the stable installation and positioning of the servo motor 54 between the clamping block 53 and the first positioning plate 51 is realized, displacement of the servo motor 54 during work is avoided, transmission accuracy is affected, the end of the horizontal cross bar 61 of the main welding mechanism 6 is erected on the upper surface of the support table 52, the second positioning plate 510 fixedly installed at the other end of the upper surface of the support table 52 is in close contact with one side of the horizontal cross bar 61, limiting and fixing of the horizontal cross bar 61 are formed, the stability of the connection between the main welding mechanism 6 and the auxiliary welding mechanism 5 is ensured, the first motor lead screw transmission assembly 4 provides horizontal driving force, the bottom end of the connecting side plate 58 fixedly installed at one side of the support table 52 is threadedly connected with the lead screw of the first motor lead screw transmission assembly 4, and the bottom of the first positioning plate 51 is slidably connected with the limiting guide rail 7 fixedly installed on the upper surface of the support frame 2, when the first motor lead screw transmission assembly 4 is started, the lead screw rotates to drive the connecting side plate 58 to move, thereby dragging the support table 52 to stably slide along the limiting guide rail 7, synchronous horizontal displacement of the auxiliary welding mechanism 5 and the main welding mechanism 6 is realized, the close contact of the second positioning plate 510 with the horizontal cross bar 61 strengthens the connection stability of each mechanism, prevents structural shaking during cooperative work, reduces welding deviation, adapts to high-precision welding requirements of automobile parts, simultaneously simplifies the part assembly process, reduces the later debugging and maintenance cost, and helps to improve the efficiency and product qualification rate of welding work.

[0024] Embodiment three: according to Figure 2 , Figure 4 and Figure 5As shown, the upper surface of the horizontal crossbar 61 is fixedly installed with a second motor lead screw transmission assembly 62, the second motor lead screw transmission assembly 62 is arranged along the length direction of the horizontal crossbar 61, and the second motor lead screw transmission assembly 62 is perpendicular to the first motor lead screw transmission assembly 4, the outer wall of the lead screw of the second motor lead screw transmission assembly 62 is threadedly connected with a hollow frame 63, the inside of the hollow frame 63 is fixedly installed with a third motor lead screw transmission assembly 64, the third motor lead screw transmission assembly 64 is arranged in a vertical state, and the outer wall of the lead screw of the third motor lead screw transmission assembly 64 is threadedly connected with a first welding gun 65, the first welding gun 65 is located between the two second welding guns 57.

[0025] In the embodiment, the second motor lead screw transmission assembly 62 is arranged along the length direction of the horizontal crossbar 61 and is perpendicular to the first motor lead screw transmission assembly 4, the hollow frame 63 can realize transverse displacement through the driving of the second motor lead screw transmission assembly 62, the third motor lead screw transmission assembly 64 fixedly installed inside the hollow frame 63 is arranged in a vertical state, and the first welding gun 65 can realize up-down lifting under the action of the third motor lead screw transmission assembly 64, and the first welding gun 65 is located between the two second welding guns 57 to form a cooperative working layout with the auxiliary welding mechanism 5, the vertical arrangement of the second motor lead screw transmission assembly 62 and the first motor lead screw transmission assembly 4, combined with the vertical design of the third motor lead screw transmission assembly 64, provides the first welding gun 65 with three-dimensional space adjustment capability, so that it can flexibly adapt to different welding position requirements, the layout of the first welding gun 65 between the two second welding guns 57 can realize cooperative work of multiple welding guns, cover more complex welding tracks, greatly improve the precision and flexibility of welding, meet the complex welding requirements of automobile parts, and at the same time, the transmission is stable and reliable, reduces welding deviation, and helps to improve work efficiency and product quality.

[0026] Embodiment four: according to Figure 1 , Figure 2 and Figure 3 As shown, the lower surface of the bearing plate 1 is fixedly installed with a plurality of partition pad rods 3 at equal intervals, the inside of the bearing plate 1 is provided with a through hole 10, the first welding gun 65 and the second welding gun 57 are located above the bearing plate 1, and the first welding gun 65 and the second welding gun 57 are arranged in an inverted triangular manner, the inside of the support frame 2 is fixedly installed with an electric cylinder 8, the electric cylinder 8 is located on the upper surface of the bearing plate 1, and the electric cylinder 8 is located at the edge of the bearing plate 1, the two electric cylinders 8 are symmetrically arranged, and the piston rods of the two electric cylinders 8 are fixedly connected with a contact frame 9, and the contact frame 9 is movably arranged on the upper surface of the bearing plate 1.

[0027] In this embodiment, the plurality of spacer rods 3 fixed at equal intervals on the lower surface of the bearing plate 1 provide stable support for the overall device, the through holes 10 opened in the interior of the bearing plate 1 achieve heat dissipation and avoidance during welding, the first welding gun 65 and the second welding gun 57 are both located above the bearing plate 1 and arranged in an inverted triangular pattern, forming a multi-angle collaborative welding pattern, the contact frame 9 fixedly connected between the piston rods of the two electric cylinders 8 is movably attached to the upper surface of the bearing plate 1, used for adjusting the position of the automobile parts, the plurality of spacer rods 3 ensure the overall stability of the device, the through holes 10 avoid the accumulation of welding heat, and the inverted triangular arrangement of the welding guns can comprehensively cover the welding area, improving the uniformity of welding. The cooperation of the symmetrical electric cylinders 8 and the contact frame 9 is reliable and balanced in stress, preventing displacement of the workpiece during welding and ensuring welding precision. The overall device not only strengthens the support and workpiece fixing effect of the device, but also optimizes the welding layout, meeting the efficient and accurate welding needs of automobile parts and improving the operation stability and product qualification rate.

[0028] The use method and working principle of the device are as follows: place the automobile parts to be welded on the upper surface of the bearing plate 1, with the bottom thereof attached to the contact frame 9, start the two symmetrically arranged electric cylinders 8, the piston rods of the electric cylinders 8 are driven to extend or retract to drive the contact frame 9 to move on the upper surface of the bearing plate 1 until the contact frame 9 is tightly attached to the parts, then start the first motor lead screw transmission assembly 4, the rotation of the lead screw drives the movement of the linking side plate 58 on one side of the support table 52, at the same time, the bottom of the first positioning plate 51 slides along the limiting guide rail 7 on the upper surface of the support frame 2 through the sliding block, drags the support table 52 and the auxiliary welding mechanism 5 and the main welding mechanism 6 above it to move along the length direction of the support frame 2, adjusts to the appropriate welding starting position, according to the welding requirements, starts the servo motor 54, drives the support arm 55 to rotate through the worm and gear transmission assembly, adjusts the welding angle of the second welding gun 57, starts the second motor lead screw transmission assembly 62, drives the hollow frame 63 to move along the length direction of the horizontal cross bar 61, adjusts the transverse position of the first welding gun 65, and then starts the third motor lead screw transmission assembly 64, drives the first welding gun 65 to ascend or descend along the vertical direction, so that the first welding gun 65 and the second welding gun 57 are both aligned with the welding positions of the parts. During the welding process, the horizontal longitudinal, horizontal transverse and vertical positions of the welding mechanisms can be adjusted through the first motor lead screw transmission assembly 4, the second motor lead screw transmission assembly 62 and the third motor lead screw transmission assembly 64 respectively according to the welding track requirements, and the angle of the second welding gun 57 can be adjusted through the servo motor 54 to ensure that each welding gun accurately completes the welding work. The through holes 10 in the interior of the bearing plate 1 achieve heat dissipation and avoidance during welding, after the welding is completed, the driving assemblies are closed, the electric cylinders 8 are retracted to drive the contact frame 9 to reset, and the welded parts are removed.

[0029] Although the present application has been described in detail with reference to the foregoing embodiments, the technical solutions recorded in the foregoing embodiments can be modified, or some of the technical features can be replaced by equivalent features, by those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A collaborative welding device for welding automotive parts, characterized in that: The utility model provides a welding device, including the bearing plate (1), the edge of bearing plate (1) is fixedly installed with support frame (2), the top of support frame (2) is slidably installed with auxiliary welding mechanism (5), and the fixed connection of two auxiliary welding mechanism (5) has main welding mechanism (6), auxiliary welding mechanism (5) includes first locating plate (51), support table (52) and clamping block (53), support table (52) is slidably installed at the top of support frame (2), and first locating plate (51) is fixedly installed on the upper surface of support table (52), first locating plate (51) is close to one end of support table (52), clamping block (53) is inserted at the top of first locating plate (51), the inside of clamping block (53) is installed with servo motor (54), and support arm (55) is rotatably installed on one side of clamping block (53), and the output end of servo motor (54) is connected through worm and gear transmission assembly between the end of support arm (55) and servo motor (54), wherein the worm is fixedly connected with the output end of servo motor (54), and the other end of support arm (55) is fixedly installed with mounting connecting block (56), and mounting connecting block (56) is perpendicular to support arm (55), and second welding torch (57) is fixedly installed on the end of mounting connecting block (56).

2. A synergic welding device for welding of automobile parts as claimed in claim 1, wherein: The outer wall of servo motor (54) is fixedly installed with locating piece (59), and the gap between locating piece (59) and clamping block (53) is adapted to the thickness of first locating plate (51), and locating piece (59) and first locating plate (51) are connected through bolt.

3. A synergic welding device for welding of automobile parts as claimed in claim 1, wherein: The main welding mechanism (6) includes a horizontal cross bar (61), and the end of the horizontal cross bar (61) is erected on the upper surface of the support table (52). The upper surface of the support table (52) is fixedly installed with a second locating plate (510), and the second locating plate (510) is located at the other end of the support table (52). The side of the second locating plate (510) is attached to the horizontal cross bar (61).

4. The synergic welding device for welding of automobile parts as claimed in claim 1 wherein: A first motor screw rod transmission assembly (4) is fixedly installed on one side of the support frame (2). A limiting guide rail (7) is fixedly installed on the upper surface of the support frame (2). A connecting side plate (58) is fixedly installed on one side of the support table (52). The bottom end of the connecting side plate (58) is threadedly connected with the screw rod of the first motor screw rod transmission assembly (4). The bottom of the first locating plate (51) is slidably connected with the limiting guide rail (7) through a sliding block.

5. A synergic welding device for welding of automobile parts as claimed in claim 3, wherein: A second motor screw rod transmission assembly (62) is fixedly installed on the upper surface of the horizontal cross bar (61). The second motor screw rod transmission assembly (62) is arranged along the length direction of the horizontal cross bar (61), and the second motor screw rod transmission assembly (62) is perpendicular to the first motor screw rod transmission assembly (4). A hollow frame (63) is threadedly connected with the outer wall of the screw rod of the second motor screw rod transmission assembly (62).

6. A synergic welding device for welding of automobile parts as claimed in claim 5 wherein: The inside of the hollow frame (63) is fixedly installed with a third motor lead screw transmission assembly (64), the third motor lead screw transmission assembly (64) is arranged in a vertical state, a first welding gun (65) is threadedly connected to the outer wall of the third motor lead screw transmission assembly (64), and the first welding gun (65) is located between the two second welding guns (57).

7. A synergic welding device for welding of automotive parts as claimed in claim 6, wherein: A plurality of partition spacer rods (3) are fixedly installed on the lower surface of the bearing plate (1) at equal intervals, a through hole (10) is formed in the bearing plate (1), the first welding gun (65) and the second welding gun (57) are both located above the bearing plate (1), and the first welding gun (65) and the second welding gun (57) are arranged in a reverse triangular shape.

8. A synergic welding device for welding of automobile parts as claimed in claim 1, wherein: The inner side of the support frame (2) is fixedly installed with an electric cylinder (8), the electric cylinder (8) is located on the upper surface of the bearing plate (1), and the electric cylinder (8) is located at the edge of the bearing plate (1), and the two electric cylinders (8) are symmetrically arranged.

9. A synergic welding device for welding of automotive parts as claimed in claim 8, wherein: The piston rods of the two electric cylinders (8) are fixedly connected with a contact frame (9), and the contact frame (9) is movably arranged on the upper surface of the bearing plate (1).

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