Welding device for automobile part manufacturing

Abstract

The invention discloses a welding device for automobile part manufacturing, and relates to the field of welding devices.The welding device comprises a welding frame, an edge frame is fixedly arranged at the end of the welding frame, two sets of guide rods are fixedly installed on the edge frame, a driving frame is installed in the middle of the welding frame, and a stepping welding table is installed at the bottom of the driving frame; a welding table A, a welding table B and a welding table C are respectively arranged on the stepping welding table, an automobile triangular arm is positioned and placed on the welding table A, and the welding table A, the welding table B and the welding table C are fixedly connected through two groups of connecting arms; and a lower mounting frame on the driving frame is fixedly connected to the bottom of the welding frame. According to the welding device for automobile part manufacturing, by means of a feeding and discharging and welding circulation mode, standby loss during single-station welding is avoided, and the productivity is improved; when the welded automobile triangular arm is taken down or placed, the welding work of the welding seat is not delayed; and the welding efficiency of the welding device on the automobile triangular arm is greatly improved.

Description

Technical Field

[0001] The invention relates to the field of welding devices, in particular to a welding device used for manufacturing automobile parts. Background Art

[0002] At present, when welding workpieces, a wire feeder and a wire drawing mechanism are added. For example, Chinese patent CN217799469U discloses a welding device that can pull out the welding wire so that it is located above the welding position, thereby improving the automation level of the welding device and automatically pulling and moving the welding wire on the workpiece to be welded, reducing the labor of the staff and reducing the production cost of the enterprise. However, the device directly pulls the welding wire above the welding position for use without removing impurities adhering to the surface of the welding wire in advance, which affects the quality of the welding vehicle triangle arm. In addition, the welding wire is in a bent state when it is pulled out from the reel, affecting subsequent normal use.

[0003] In order to solve the above problems, after searching, a Chinese patent with the announcement number CN219026414U discloses an automobile triangle arm welding device, which includes an operation box, an I-shaped frame fixedly provided on the right side of the inner cavity of the operation box, a reel rotatably sleeved on the outside of the I-shaped frame, a copper welding wire wound on the outside of the reel, a guide seat assembly fixedly provided on the right side of the inner cavity bottom of the operation box, a first electric telescopic rod fixedly provided on the left side of the inner cavity of the operation box, a welding wire clamp assembly fixedly provided on the right side of the first electric telescopic rod, and a welding wire clamp assembly fixedly provided on the upper left side of the inner cavity of the operation box. A screw rod is rotatably provided between the right side walls, a motor is fixedly provided on the upper right side of the operation box, an external thread of the screw rod is provided with a sleeve, a second electric telescopic rod is fixedly provided at the bottom of the sleeve, a welding end is fixedly provided at the bottom of the second electric telescopic rod, a slide groove is provided at the top of the inner cavity of the operation box, and a slider is fixedly provided at the top of the sleeve; the welding end is moved to the desired position and then the second electric telescopic rod is activated to push the welding end downward, and at the same time the welding end pushes the copper welding wire below to the welding position, thereby realizing welding of the automobile triangular arm;

[0004] Although the above-mentioned device can weld the automobile triangle arm through the downward moving welding end, in actual operation, the automobile triangle arm is generally composed of two groups of triangular metal sheets. The two groups of metal sheets are welded together by the welding device using multi-point welding. After the above-mentioned device completes welding at one point, the triangle arm position is changed and secondary welding is performed, which greatly reduces the processing efficiency of the triangle arm. Summary of the Invention

[0005] The object of the present invention is to provide a welding device for manufacturing automobile parts to solve the defects mentioned in the above background technology.

[0006] To achieve the above-mentioned purpose, a welding device for automobile parts manufacturing is provided, comprising a welding frame, an edge frame is fixedly provided at the end of the welding frame, two sets of guide rods are fixedly installed on the edge frame, a driving frame is installed in the middle of the welding frame, a stepping welding table is installed at the bottom of the driving frame, welding table A, welding table B and welding table C are respectively provided on the stepping welding table, an automobile triangle arm is positioned on the welding table A, and welding table A, welding table B and welding table C are fixedly connected by two sets of connecting arms; the lower mounting frame on the driving frame is fixedly connected to the bottom of the welding frame, and the upper mounting frame on the driving frame is installed on the upper part of the welding frame through a bracket.

[0007] Furthermore, edge frames are fixedly provided at both ends of the surface of the welding frame, and the top of the edge frame is fixed by two sets of parallel guide rods. Welding table A, welding table B and welding table C are respectively inserted on the two sets of guide rods. Welding table A, welding table B and welding table C are distributed linearly, and two sets of slots are provided on both sides of the bottom of the welding frame.

[0008] Furthermore, the driving frame includes a lower mounting frame, an upper mounting frame, a cylinder, a welding seat, a mounting box, a welding plate and a welding end. The lower mounting frame and the upper mounting frame are arranged in parallel. Two groups of welding seats are installed on the lower mounting frame and the upper mounting frame. The two groups of welding seats are synchronously driven to rise and fall by two groups of cylinders respectively. The mounting box and the welding plate are both arranged in a triangular shape.

[0009] Furthermore, two groups of welding seats are respectively arranged on the upper and lower sides of the automobile triangle arm. The two groups of welding seats move toward each other to perform multi-point welding and fixing work on the double-layer automobile triangle arm through multiple groups of welding ends at the bottom.

[0010] Furthermore, the welding seat includes a mounting box, a welding plate and a welding end head. Two groups of cylinders are installed on the mounting box. A welding plate is provided at the bottom of the mounting box. Multiple groups of welding end heads are evenly installed at the bottom of the welding plate. The distribution positions of the multiple groups of welding end heads correspond to the welding positions of the automobile triangle arm.

[0011] Furthermore, the stepper welding station includes welding station A, welding station B, welding station C, a connecting arm and a stepper drive mechanism. Welding station A, welding station B and welding station C are stepped and moved laterally by the stepper drive mechanism. The structures of welding station A, welding station B and welding station C are consistent. Welding station C includes a frame, a receiving port, a first positioning column, a second positioning column and a guide seat. The first positioning column and the second positioning column are respectively inserted into the mounting holes opened on the automobile triangle arm.

[0012] Furthermore, an accommodating opening is opened in the middle of the platform, and the accommodating opening is arranged opposite to the multiple groups of welding ends. A first positioning column and a second positioning column are respectively installed on both sides of the surface of the platform. The platform and the automobile triangle arm are positioned by the first positioning column and the second positioning column. Guide seats are installed at both ends of welding platform A, welding platform B and welding platform C, and guide rods are inserted into the inside of the guide seats.

[0013] Furthermore, the stepping drive mechanism includes a fixed plate, a rack, a gear, a stepping motor and a base. The fixed plate is fixedly connected to one side of welding table A, welding table B and welding table C. A rack is provided at the bottom of the fixed plate. The size of the rack is adapted to the gear, and the rack is meshed with the gear.

[0014] Furthermore, a base is installed at the bottom of the stepper motor, the bottom of the base is fixed to the welding frame, the output shaft of the stepper motor is connected to the gear through a key shaft, and the three sets of welding tables are driven to move back and forth horizontally through the fixed plate, rack, gear and stepper motor.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention utilizes a stepping drive mechanism to achieve reciprocating lateral movement of welding stations A, B, and C. When welding station A is operating at a welding station, welding stations B and C can simultaneously perform loading and unloading operations. After welding, welding station A is removed and welding station B is moved in for welding. At this time, welding station C continues loading and unloading, and welding station A begins clamping a new workpiece. This welding, loading and unloading cycle avoids standby losses associated with single-station welding and increases production capacity. When removing or placing a welded automotive jib arm, the welding work of the welding base is not interrupted. This significantly improves the welding efficiency of automotive jib arms with this welding device.

[0017] 2. After the welding table is moved out of the workstation, workers can safely load and unload workpieces in a non-welding area without having to approach high-temperature welding ends, improving operational safety. The equipment does not need to be frequently started and stopped, and the cyclic action of the stepping drive mechanism and welding seat can keep the equipment running under stable conditions, reducing energy consumption. At the same time, the multi-station design reduces equipment idle time, dilutes equipment investment costs, and improves the output ratio per unit time. The design of three-station cycle plus synchronous multi-point welding and parallel loading and unloading breaks through the efficiency bottleneck of traditional single-station welding. Under the premise of ensuring welding quality, it achieves multiple improvements in production efficiency, equipment utilization rate and operational convenience. It is particularly suitable for the processing of parts that require batch welding of automotive triangle arms.

[0018] 3. The present invention utilizes two sets of opposing welding heads, each symmetrically arranged vertically by a cylinder. When the welding platform is moved to the workstation, the upper and lower welding heads move synchronously toward each other, aligning with the preset welding points on the double-layer automotive jib. Current conduction generates high temperatures, causing the contact surfaces of the double-layer plates to fuse with the welding material. Multiple sets of heads weld simultaneously, forming welds at corresponding points on the double-layer structure, thus achieving a secure connection between the two-layer components. Simultaneous welding with multiple sets of heads allows the simultaneous completion of multiple welds on the double-layer structure, avoiding the time-consuming, point-by-point welding process of single-point welding and shortening the welding cycle at a single workstation, making it particularly suitable for mass production scenarios.

[0019] 4. The present invention arranges the upper and lower welding ends relatively and applies force synchronously, so that the double-layer plate is heated and stressed evenly and symmetrically during welding, offsetting the thermal stress generated by local welding, effectively reducing the risk of deformation such as warping and twisting of the triangle arm due to welding, and ensuring the dimensional accuracy of the component; avoiding position deviation during manual or single-end welding, ensuring the consistency of the weld point position, penetration depth and strength of each triangle arm, and improving the qualified rate of parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a front view schematic diagram of the structure of the present invention;

[0021] Figure 2 for Figure 1 Schematic diagram of the local structure;

[0022] Figure 3 for Figure 1 Bottom view of

[0023] Figure 4 for Figure 1 A top view of

[0024] Figure 5 for Figure 1 Rear view;

[0025] Figure 6 for Figure 2 Bottom view of

[0026] Figure 7 for Figure 2 A top view of

[0027] Figure 8 for Figure 2 Front view of .

[0028] Reference numerals

[0029] 1. Welding frame; 2. Edge frame; 3. Guide rod; 4. Drive frame; 41. Lower mounting frame; 42. Upper mounting frame; 43. Cylinder; 44. Welding seat; 441. Mounting box; 442. Welding plate; 443. Welding end; 5. Stepper welding table; 51. Welding table A; 52. Welding table B; 53. Welding table C; 531. Table; 5311. Receiving port; 532. First positioning column; 533. Second positioning column; 534. Guide seat; 54. Connecting arm; 55. Stepper drive mechanism; 551. Fixed plate; 552. Rack; 553. Gear; 554. Stepper motor; 555. Machine base; 6. Automobile triangle arm. DETAILED DESCRIPTION

[0030] Specific implementation method 1: Please refer to Figures 1-8 The present invention provides a technical solution: a welding device for manufacturing automobile parts, comprising a welding frame 1, an edge frame 2 is fixedly provided at the end of the welding frame 1, two groups of guide rods 3 are fixedly installed on the edge frame 2, a driving frame 4 is installed in the middle of the welding frame 1, a stepping welding table 5 is installed at the bottom of the driving frame 4, a welding table A51, a welding table B52 and a welding table C53 are respectively provided on the stepping welding table 5, an automobile triangle arm 6 is positioned on the welding table A51, and the welding table A51, the welding table B52 and the welding table C53 are fixedly connected by two groups of connecting arms 54; the lower mounting frame 41 on the driving frame 4 is fixedly connected to the bottom of the welding frame 1, and the upper mounting frame 42 on the driving frame 4 is installed on the upper part of the welding frame 1 through a bracket.

[0031] Working principle: During actual use, first install three groups of automobile parts that need to be welded: automobile triangle arm 6 on welding table A51, welding table B52 and welding table C53 respectively. Welding table A51, welding table B52 and welding table C53 can be driven by stepping drive mechanism 55 for reciprocating horizontal movement. When welding table A51 moves to the welding station on driving frame 4, welding seats 44 on the upper and lower sides of welding table A51 move toward each other synchronously. There are multiple groups of welding ends 443 evenly arranged on welding seats 44. The two groups of welding seats 44 move toward each other and perform multi-point welding and fixing of the double-layer automobile triangle arm 6 through the multiple groups of welding ends 443 at the bottom. After the welding of automobile triangle arm 6 on welding table A51 is completed, welding table A51 is driven to move by stepping drive mechanism 55, so that welding table A51 moves out of the welding station and welding table B52 moves into the welding station. Similarly, when welding the automobile triangle arm 6 on welding table B52, welding table A51 moves out of the welding station and welding table B52 moves into the welding station. After the welding of the automobile triangle arm 6 is completed, the welding station B52 moves out of the welding station and the welding station C53 moves into the welding station. During this process, the welded automobile triangle arm 6 can be removed and a new automobile triangle arm 6 that needs to be welded can be installed, and this process is repeated, which greatly improves the welding efficiency of the welding device for the automobile triangle arm 6; when the welded automobile triangle arm 6 is removed or placed, the welding work of the welding seat 44 will not be delayed; the welding station A51, the welding station B52 and the welding station C53 are moved back and forth horizontally by the stepping drive mechanism 55. When the welding station A51 is operating at the welding station, the welding station B52 and the welding station C53 can perform loading and unloading operations synchronously; the welding station A51 moves out after welding is completed, and the welding station B52 moves in for welding. At this time, the welding station C53 continues to load and unload, and the welding station A51 starts to clamp the new workpiece; this welding, loading and unloading, and welding cycle mode avoids the standby loss during welding at a single station and improves production capacity;

[0032] The multiple sets of welding ends 443 on each set of welding seats 44 simultaneously perform multi-point fixed welding on the double-layer triangular arm, which can reduce the risk of workpiece deformation compared to single-point welding, and at the same time shorten the welding time of a single station, further improving efficiency; when a certain welding station is welding at a station, other welding stations can simultaneously remove and install the workpiece without waiting for the welding to be completed; the welding seats 44 on the upper and lower sides move toward each other, and the multiple sets of welding ends 443 apply force at the same time, which can make the double-layer triangular arm evenly stressed during welding, reduce the deformation of the workpiece caused by local heating, and ensure the structural strength and dimensional accuracy after welding; after the welding station is moved out of the station, the worker can safely carry out work in the non-welding area The equipment does not need to be started and stopped frequently, and the cyclic action of the stepping drive mechanism 55 and the welding seat 44 can keep the equipment running under stable working conditions, reducing energy consumption. At the same time, the multi-station design reduces the idle time of the equipment, dilutes the equipment investment cost, and improves the output ratio per unit time. The design of three-station cycle plus synchronous multi-point welding plus parallel loading and unloading breaks through the efficiency bottleneck of traditional single-station welding. Under the premise of ensuring welding quality, it achieves multiple improvements in production efficiency, equipment utilization and operational convenience. It is especially suitable for the processing scenarios of parts that require batch welding of automobile triangle arms 6.

[0033] When welding stations A51, B52, and C53 are moving laterally, guide rods 3 are inserted into the guide seats 534 on both sides to limit and guide the three groups of welding stations moving laterally, thereby preventing the welding stations from being stable during the lateral movement, preventing them from tilting, and preventing the rack 552 and gear 553 from being disengaged.

[0034] The lateral driving method of welding station A51, welding station B52 and welding station C53 is: start the external switch of the stepper motor 554, the output shaft of the stepper motor 554 drives the gear 553 to rotate, and the gear 553 drives the rack 552 engaged with it to move horizontally, thereby completing the step-driven lateral reciprocating motion of welding station A51, welding station B52 and welding station C53.

[0035] Specific embodiment 2: This embodiment is a further limitation of specific embodiment 1. Edge frames 2 are fixedly provided at both ends of the surface of the welding frame 1. The top of the edge frame 2 is fixed by two sets of parallel guide rods 3. The two sets of guide rods 3 are respectively interspersed with welding tables A51, welding tables B52 and welding tables C53. Welding tables A51, welding tables B52 and welding tables C53 are distributed linearly. Two sets of slots are opened on both sides of the bottom of the welding frame 1.

[0036] Specific embodiment three: This embodiment is a further limitation of specific embodiment one. The driving frame 4 includes a lower mounting frame 41, an upper mounting frame 42, a cylinder 43, a welding seat 44, a mounting box 441, a welding plate 442 and a welding end 443. The lower mounting frame 41 and the upper mounting frame 42 are arranged in parallel. Two sets of welding seats 44 are installed on the lower mounting frame 41 and the upper mounting frame 42. The two sets of welding seats 44 are synchronously driven to rise and fall by two sets of cylinders 43 respectively. The mounting box 441 and the welding plate 442 are both triangular in shape.

[0037] A first positioning post 532 and a second positioning post 533 are mounted on both sides of the surface of the stand 531. The stand 531 and the vehicle jib 6 are positioned by the first positioning post 532 and the second positioning post 533. This allows the vehicle jib 6 to be quickly welded on the welding table. Furthermore, a receiving opening 5311 is provided on the stand 531. Multiple welding tips 443 on the welding seat 44 at the bottom can pass through the receiving opening 5311 to weld the bottom of the vehicle jib 6.

[0038] The welding method of the two sets of relatively arranged welding end heads 443 for the double-layer automobile triangle arm 6 is as follows: the two sets of relatively arranged welding end heads 443 are symmetrically arranged up and down by the cylinder 43. When the welding table moves to the work station, the welding end heads 443 on the upper and lower sides move toward each other synchronously, aligning with the preset welding point positions of the double-layer automobile triangle arm 6. The high temperature is generated by the conduction of current, so that the contact surface of the double-layer plate and the welding material are melted and combined. Multiple sets of end heads are welded at the same time, and welding points are formed at the corresponding points of the double-layer structure to achieve fixed connection of the double-layer components. Multiple sets of end heads are welded at the same time, and the welding of multiple welding points on the double-layer structure can be completed at the same time, avoiding the time-consuming point-by-point operation of single-point welding and shortening the welding cycle of a single work station. , which is especially suitable for mass production scenarios; the upper and lower welding ends 443 are relatively arranged and force is applied synchronously, so that the double-layer plate is heated and stressed evenly and symmetrically during welding, offsetting the thermal stress generated by local welding, effectively reducing the risk of deformation such as warping and twisting of the triangle arm due to welding, and ensuring the dimensional accuracy of the component; avoiding position deviation during manual or single-end welding, ensuring the consistency of the weld position, penetration and strength of each triangle arm, and improving the qualified rate of parts; multi-point synchronous welding makes the welds evenly distributed on the double-layer structure, forming more dense connection points. Compared with single-point or a small number of welding points, it can enhance the shear and bending resistance of the triangle arm, and meet the requirements of the automobile suspension system for component strength and durability.

[0039] Specific embodiment four: This embodiment is a further limitation of specific embodiment three. Two groups of welding seats 44 are respectively arranged on the upper and lower sides of the automobile triangle arm 6. The two groups of welding seats 44 move toward each other and perform multi-point welding and fixing work on the double-layer automobile triangle arm 6 through multiple groups of welding ends 443 at the bottom.

[0040] Specific embodiment five: This embodiment is a further limitation of specific embodiment four. The welding seat 44 includes a mounting box 441, a welding plate 442 and a welding end 443. Two groups of cylinders 43 are installed on the mounting box 441. A welding plate 442 is provided at the bottom of the mounting box 441. Multiple groups of welding ends 443 are evenly installed on the bottom of the welding plate 442. The distribution positions of the multiple groups of welding ends 443 correspond to the welding positions of the automobile triangle arm 6.

[0041] Specific embodiment six: This embodiment is a further limitation of specific embodiment one. The stepping welding table 5 includes a welding table A51, a welding table B52, a welding table C53, a connecting arm 54 and a stepping drive mechanism 55. The welding table A51, the welding table B52 and the welding table C53 are stepped and moved laterally by the stepping drive mechanism 55. The structures of the welding table A51, the welding table B52 and the welding table C53 are consistent. The welding table C53 includes a stand 531, an accommodating port 5311, a first positioning column 532, a second positioning column 533 and a guide seat 534. The first positioning column 532 and the second positioning column 533 are respectively inserted into the mounting holes opened on the automobile triangle arm 6.

[0042] Specific embodiment seven: This embodiment is a further limitation of specific embodiment six. A receiving opening 5311 is opened in the middle of the stand 531, and the receiving opening 5311 is arranged opposite to the multiple groups of welding ends 443. A first positioning column 532 and a second positioning column 533 are respectively installed on both sides of the surface of the stand 531. The stand 531 and the automobile triangle arm 6 are positioned by the first positioning column 532 and the second positioning column 533. Guide seats 534 are installed at both ends of the welding table A51, the welding table B52 and the welding table C53, and a guide rod 3 is inserted into the inside of the guide seat 534.

[0043] Specific embodiment eight: This embodiment is a further limitation of specific embodiment six. The stepping drive mechanism 55 includes a fixed plate 551, a rack 552, a gear 553, a stepping motor 554 and a base 555. The fixed plate 551 is fixedly connected to one side of the welding table A51, the welding table B52 and the welding table C53. A rack 552 is provided at the bottom of the fixed plate 551. The rack 552 is adapted to the size of the gear 553, and the rack 552 is meshed with the gear 553.

[0044] Specific embodiment nine: This embodiment is a further limitation of specific embodiment eight. A base 555 is installed at the bottom of the stepper motor 554. The bottom of the base 555 is fixed to the welding frame 1. The output shaft of the stepper motor 554 is connected to the gear 553 through a key shaft. The three sets of welding tables are driven to move back and forth horizontally through the fixed plate 551, the rack 552, the gear 553 and the stepper motor 554.

Claims

1. A welding device for manufacturing automobile parts, comprising a welding frame (1), characterized in that: The end of the welding frame (1) is fixedly provided with an edge frame (2), two groups of guide rods (3) are fixedly installed on the edge frame (2), a driving frame (4) is installed in the middle of the welding frame (1), a step welding platform (5) is installed at the bottom of the driving frame (4), a welding platform A (51), a welding platform B (52) and a welding platform C (53) are respectively provided on the step welding platform (5), an automobile triangle arm (6) is positioned and placed on the welding platform A (51), and the welding platform A (51), the welding platform B (52) and the welding platform C (53) are fixedly connected by two groups of connecting arms (54); the lower mounting frame (41) on the driving frame (4) is fixedly connected to the bottom of the welding frame (1), and the upper mounting frame (42) on the driving frame (4) is installed on the upper part of the welding frame (1) through a bracket.

2. A welding device for automobile parts manufacturing according to claim 1, characterized in that: Edge frames (2) are fixedly provided at both ends of the surface of the welding frame (1); the top of the edge frame (2) is fixed by two sets of parallel guide rods (3); welding platforms A (51), welding platforms B (52) and welding platforms C (53) are respectively inserted on the two sets of guide rods (3); welding platforms A (51), welding platforms B (52) and welding platforms C (53) are distributed in a linear manner; two sets of slots are provided on both sides of the bottom of the welding frame (1).

3. The welding device for automobile parts manufacturing according to claim 1, characterized in that: The driving frame (4) comprises a lower mounting frame (41), an upper mounting frame (42), a cylinder (43), a welding seat (44), a mounting box (441), a welding plate (442) and a welding end (443). The lower mounting frame (41) and the upper mounting frame (42) are arranged in parallel. Two groups of welding seats (44) are installed on the lower mounting frame (41) and the upper mounting frame (42). The two groups of welding seats (44) are synchronously driven to rise and fall by two groups of cylinders (43). The mounting box (441) and the welding plate (442) are both arranged in a triangular shape.

4. A welding device for automobile parts manufacturing according to claim 3, characterized in that: Two groups of welding seats (44) are respectively arranged on the upper and lower sides of the automobile triangle arm (6). The two groups of welding seats (44) move toward each other to perform multi-point welding and fixing work on the double-layer automobile triangle arm (6) through multiple groups of welding ends (443) at the bottom.

5. A welding device for automobile parts manufacturing according to claim 4, characterized in that: The welding seat (44) comprises a mounting box (441), a welding plate (442) and a welding end (443); two groups of cylinders (43) are mounted on the mounting box (441); a welding plate (442) is provided at the bottom of the mounting box (441); a plurality of groups of welding end (443) are evenly mounted at the bottom of the welding plate (442); and the distribution positions of the plurality of groups of welding end (443) correspond to the welding positions of the automobile triangular arm (6).

6. The welding device for automobile parts manufacturing according to claim 1, characterized in that: The step welding platform (5) comprises a welding platform A (51), a welding platform B (52), a welding platform C (53), a connecting arm (54) and a step driving mechanism (55). The welding platforms A (51), B (52) and C (53) are stepped and moved laterally by the step driving mechanism (55). The structures of the welding platforms A (51), B (52) and C (53) are consistent. The welding platform C (53) comprises a platform (531), a receiving port (5311), a first positioning column (532), a second positioning column (533) and a guide seat (534). The first positioning column (532) and the second positioning column (533) are respectively inserted into the mounting holes opened on the automobile triangular arm (6).

7. A welding device for automobile parts manufacturing according to claim 6, characterized in that: The platform (531) is provided with an accommodating opening (5311) in the middle thereof, and the accommodating opening (5311) is arranged opposite to the plurality of welding end heads (443). A first positioning column (532) and a second positioning column (533) are respectively installed on both sides of the surface of the platform (531). The platform (531) and the automobile triangular arm (6) are positioned by the first positioning column (532) and the second positioning column (533). Guide seats (534) are installed at both ends of the welding platform A (51), the welding platform B (52) and the welding platform C (53), and a guide rod (3) is inserted into the interior of the guide seat (534).

8. The welding device for automobile parts manufacturing according to claim 6, characterized in that: The stepping drive mechanism (55) comprises a fixed plate (551), a rack (552), a gear (553), a stepping motor (554) and a base (555). The fixed plate (551) is fixedly connected to one side of the welding table A (51), the welding table B (52) and the welding table C (53). A rack (552) is provided at the bottom of the fixed plate (551). The sizes of the rack (552) and the gear (553) are adapted to each other, and the rack (552) and the gear (553) are meshed and connected.

9. A welding device for automobile parts manufacturing according to claim 8, characterized in that: The stepper motor (554) is provided with a base (555) at the bottom thereof, the base (555) being fixed to the welding frame (1) at the bottom thereof, the output shaft of the stepper motor (554) being connected to the gear (553) via a key shaft, and the three welding tables being driven to move horizontally back and forth via the fixing plate (551), the rack (552), the gear (553) and the stepper motor (554).

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