An automatically positioned automobile parts welding apparatus

Abstract

The present application relates to the field of truck welding equipment, especially to an automatic positioning truck part welding equipment. The automatic positioning truck part welding equipment described in the present application fixes the shaft end and the new shaft rod in the fixed mechanism and the two electric control clamps respectively before laser welding work is performed on the shaft end and the new shaft rod of the shaft pipe. The laser positioning sensor on the ring-shaped frame is driven by the electric sliding block to scan in the front-back direction, automatically positioning the position of the to-be-welded area between the shaft end and the shaft rod, and controlling the laser welding gun to cooperate with the rear electric rotating ring and the front electric rotating ring to drive the shaft end and the shaft rod to perform automatic laser welding work. The technical problem of poor manual positioning and welding effect while simultaneously considering the maintenance efficiency and welding quality in the prior art of maintaining the shaft pipe of large trucks is solved.

Description

Technical Field

[0001] This invention relates to the field of welding equipment for freight trucks, and more particularly to an automatic positioning welding equipment for automotive parts. Background Technology

[0002] In existing technologies for axle tube repair of large freight trucks, the entire axle tube typically needs to be removed from the axle, the old axle rod inside the axle tube needs to be cut and separated from the axle end, the new axle rod needs to be welded to the axle end, and finally the entire axle tube needs to be reinstalled back into the freight truck. This process involves multiple hoisting, transportation, and repositioning, which is cumbersome, time-consuming, and prone to reduced fit accuracy due to repeated disassembly and assembly, and significantly increases the occupation of repair space and labor costs. To simplify the process, some repair solutions attempt to keep the axle tube on the freight truck, only removing chassis assemblies such as wheel hubs and brakes from the axle tube, and then directly cutting the old axle rod and welding the new axle rod under the vehicle body. However, in the cutting and welding work under the freight truck body, the lack of mechanical positioning assistance and poor positioning accuracy during manual welding result in a large deviation in the coaxiality between the new axle rod and the axle end, directly affecting the welding quality and subsequent driving safety. Therefore, how to balance repair efficiency and welding quality has become an urgent technical problem to be solved in the axle tube repair process of large freight trucks. Summary of the Invention

[0003] In order to overcome the shortcomings of existing technologies for axle tube repair of large freight trucks, which make it difficult to simultaneously achieve both repair efficiency and welding quality, and where manual positioning and welding results are poor, this invention provides an automatic positioning welding device for automotive parts.

[0004] Technical Solution: An automatic positioning welding equipment for automotive parts includes a support frame, a main flame deflector, a rear electric rotating ring, a fixing mechanism, a front electric rotating ring, an electrically controlled clamping plate, an electric slider, a ring frame, a laser welding gun, and a laser positioning sensor. The main flame deflector is fixedly connected to the rear side of the support frame. The rear electric rotating ring is mounted on the support frame. A fixing mechanism for fixing the shaft end is fixedly connected to the rotating component of the rear electric rotating ring. The front electric rotating ring is mounted on the front side of the support frame, with its rotation axis aligned with that of the rear electric rotating ring. Two electrically controlled clamping plates for fixing the shaft are fixedly connected to the rotating component of the front electric rotating ring. Two electric sliders are slidably connected to the support frame. A ring frame is fixedly connected between the two electric sliders, and the ring frame is located between the rear and front electric rotating rings. A laser welding gun is mounted on the ring frame. A laser positioning sensor for automatic positioning is mounted on the ring frame.

[0005] Preferably, four height-adjustable casters are installed under the support frame, and the height of the support frame can be adjusted by adjusting the height of the support frame.

[0006] Preferably, a rear retaining ring is fixedly connected to the rotating component of the rear electric rotating ring; a front retaining ring is fixedly connected to the rotating component of the front electric rotating ring.

[0007] In another embodiment, preferably, an electromagnetic heating ring is installed inside the ring frame.

[0008] Preferably, a central retaining ring for protecting the electromagnetic heating ring is fixed to the rear side of the ring frame.

[0009] Preferably, a temperature sensor is installed on the ring frame to monitor the preheating temperature of the shaft.

[0010] In another embodiment, preferably, the fixing mechanism includes a hanging plate, a fixing pin, a plug rod, and a movable ring; the rotating part of the rear electric rotating ring is detachably mounted on the hanging plate; a fixing pin is inserted between the rotating part of the rear electric rotating ring and the hanging plate; the hanging plate has at least four insertion holes, and the insertion holes are aligned with the fixing holes on the shaft end; a plug rod is inserted between the insertion holes on the hanging plate and the corresponding fixing holes on the shaft end; a movable ring is fixedly connected to the front ends of all the plug rods.

[0011] Preferably, the movable ring is slidably connected to two pull rods, one above the other; a clamp is fixedly connected to the pull rod, and the clamp is located inside the movable ring; a tension spring is fixedly connected between the pull rod and the movable ring.

[0012] Preferably, the clamping block is made of high-temperature resistant, fire-retardant rubber material.

[0013] Preferably, each of the two clamping blocks has a number of anti-slip textures on its opposing sides.

[0014] Beneficial Effects: This invention describes an automatic positioning welding equipment for automotive parts. Based on existing repair solutions that allow the axle tube to remain on the truck for repair, before laser welding the axle end to the new shaft, the axle end and shaft are fixed between a fixing mechanism and two electrically controlled clamps. An electric slider drives a laser positioning sensor on a ring frame to scan in the front-rear direction, automatically locating the welding area between the axle end and shaft. The laser welding gun, in conjunction with a rear and front electric rotating ring, automatically laser welds the axle end and shaft. An electromagnetic heating ring can also be used for preheating, optimizing the overall structural strength of the welding area between the axle end and shaft. After welding, the fixed mechanism, which is detached separately, maintains a rigid connection between the shaft and axle end during the welding cooling process. After the welding equipment is removed and a new fixing mechanism is installed, it can be quickly used for the next laser welding operation of the same repair procedure.

[0015] The present invention describes an automatic positioning welding equipment for automotive parts, which solves the technical problem in the existing technology for axle tube repair of large freight trucks that it is difficult to simultaneously achieve repair efficiency and welding quality, and that manual positioning and welding results are poor. It realizes automated positioning and laser welding, thereby improving the overall welding efficiency and overall structural quality of axle tube repair. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the support frame of the present invention; Figure 3 This is a three-dimensional structural diagram of the rear electric rotating ring of the present invention; Figure 4 This is a three-dimensional structural diagram of the front electric rotating ring of the present invention; Figure 5 This is a three-dimensional structural diagram of the ring frame of the present invention; Figure 6 This is a three-dimensional structural diagram of the fixing mechanism of the present invention; Figure 7 This is a cross-sectional view of the three-dimensional structure of the movable ring of the present invention; Figure 8 This is a three-dimensional structural diagram of the shaft tube of the present invention in its fixed state before welding; Figure 9 This is a three-dimensional structural diagram of the shaft tube of the present invention in its fixed state after welding.

[0017] Explanation of reference numerals in the attached drawings: 1-Support frame, 11-Adjustable casters, 12-Main flame deflector, 2-Rear electric swivel, 21-Hanging plate, 2101-Insertion hole structure, 22-Fixing pin, 23-Insertion rod, 24-Moving ring, 25-Pull rod, 26-Clamping block, 2601-Anti-slip texture structure, 27-Tension spring, 28-Rear retaining ring, 3-Front electric swivel, 31-Electrically controlled clamping plate, 32-Front retaining ring, 41-Electric slider, 42-Ring frame, 43-Laser welding gun, 44-Laser positioning sensor, 51-Electromagnetic heating ring, 52-Middle retaining ring, 53-Temperature sensor, 61-Shaft end, 6101-Fixing hole structure, 62-Shaft rod. Detailed Implementation

[0018] The above-described solution will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of this application. The implementation conditions used in the embodiments may be further adjusted according to the conditions of specific manufacturers, and the implementation conditions not specified are generally those in routine experiments.

[0019] Example 1: An automatic positioning welding device for automotive parts, hereinafter referred to as "this welding device", is described in this example. Figures 1-5As shown, the system includes a support frame 1, height-adjustable casters 11, a main flame deflector 12, a rear electric rotating ring 2, a fixing mechanism, a front electric rotating ring 3, an electrically controlled clamping plate 31, an electric slider 41, a ring frame 42, a laser welding gun 43, and a laser positioning sensor 44. The main flame deflector 12 is fixedly connected to the rear side of the support frame 1. The rear electric rotating ring 2 is mounted on the support frame 1. A fixing mechanism is fixedly connected to the rotating component of the rear electric rotating ring 2. The front electric rotating ring 3 is mounted on the front side of the support frame 1, and the rotation axis of the front electric rotating ring 3 is aligned with the rotation axis of the rear electric rotating ring 2. Two symmetrically arranged electrically controlled clamping plates 31 are fixedly connected to the rotating component of the front electric rotating ring 3. An electric slider is slidably connected to the left and right sides of the support frame 1. Slider 41; A ring frame 42 is fixedly connected between two electric sliders 41, and the ring frame 42 is located between the rear electric rotating ring 2 and the front electric rotating ring 3; A laser welding gun 43 is installed on the ring frame 42; A laser positioning sensor 44 is installed on the ring frame 42, and the laser positioning sensor 44 is located on the side of the ring frame 42 away from the laser welding gun 43, so as to avoid a large amount of welding slag generated by the laser welding gun 43 during laser welding work from splashing onto the laser positioning sensor 44; Four height-adjustable casters 11 are installed under the support frame 1, and the height of the support frame 1 is adjusted by adjusting the height-adjustable casters 11 to ensure that the rotation axis of the rear electric rotating ring 2 and the rotation axis of the front electric rotating ring 3 can be aligned with the axis of the shaft end 61 and the shaft rod 62.

[0020] like Figures 2-4 As shown, a rear retaining ring 28 is fixedly connected to the rotating component of the rear electric rotating ring 2. The rear retaining ring 28 is used to shield the rotating track area of ​​the rotating component of the rear electric rotating ring 2, so as to prevent a large amount of welding slag generated by the laser welding gun 43 from splashing into the rotating track area of ​​the rear electric rotating ring 2 and damaging it. A front retaining ring 32 is fixedly connected to the rotating component of the front electric rotating ring 3. The front retaining ring 32 is used to shield the rotating track area of ​​the rotating component of the front electric rotating ring 3, so as to prevent a large amount of welding slag generated by the laser welding gun 43 from splashing into the rotating track area of ​​the front electric rotating ring 3 and damaging it.

[0021] The axle tube of a large freight truck mainly consists of axle end 61 and axle rod 62. Based on the existing repair scheme that allows the axle tube to be retained on the freight truck for repair, the workers remove the chassis assemblies such as wheel hubs and brakes from the axle tube, cut the old axle rod 62 off the axle end 61, and grind the fracture surface of the axle end 61 smooth. Then, the support frame 1 of this welding equipment is pushed to move the height adjustment casters 11 along the ground, and the rear electric swivel ring 2 and the front electric swivel ring 3 are moved towards the axle tube. Move the shaft tube so that the shaft end 61 passes through the front electric rotating ring 3 ring frame 42 and the rear electric rotating ring 2. The shaft end 61 is fixed by the fixing mechanism on the rear electric rotating ring 2. After the new shaft rod 62 is brought close to the shaft end 61 and spliced ​​together, the new shaft rod 62 is fixed by the two electric control clamps 31 on the front electric rotating ring 3. At this time, the rotation axis of the rear electric rotating ring 2 and the rotation axis of the front electric rotating ring 3 are aligned with the axis of the shaft end 61 and the shaft rod 62.

[0022] Then, the electric slider 41 is activated to drive the laser welding gun 43 and laser positioning sensor 44 on the ring frame 42 to move back and forth in the front and back direction. The laser positioning sensor 44 intelligently identifies the area to be welded between the shaft end 61 and the shaft rod 62, and the electric slider 41 drives the laser welding gun 43 on the ring frame 42 to align with the area to be welded between the shaft end 61 and the shaft rod 62. After the operator connects the laser welding gun 43 to the welding host, the laser welding gun 43 can be used to perform laser welding on the area to be welded between the shaft end 61 and the shaft rod 62. At the same time, the rear electric rotating ring 2 and the front electric rotating ring 3 drive the shaft end 61 and the shaft rod 62 to rotate synchronously, realizing the automated laser welding work of the rear electric rotating ring 2 and the front electric rotating ring 3 by the laser welding gun 43. Meanwhile, the main flame deflector 12 shields the sparks that splash backward from the laser welding gun 43 during the welding process, preventing a large amount of sparks from splashing backward onto other parts under the truck body and causing damage.

[0023] This embodiment achieves automatic intelligent identification and precise positioning of the area to be welded between shaft end 61 and shaft rod 62, eliminating the need for repeated manual calibration and significantly reducing operational difficulty and positioning errors. After positioning, the laser welding gun 43 can automatically align the weld position and, in conjunction with the rear electric rotating ring 2 and the front electric rotating ring 3, continuously and stably complete the full circumference welding operation along the annular weld between shaft end 61 and shaft rod 62. This realizes fully automated operation of the welding process in shaft tube repair, effectively avoiding problems such as discontinuous joints and uneven penetration caused by manual rotation or segmented welding, significantly improving the consistency and reliability of weld quality. Furthermore, it eliminates the need to disassemble the entire shaft tube, greatly shortening the overall repair time of the shaft tube, improving the repair efficiency of large-volume freight vehicle repair, and reducing the skill threshold and labor intensity of operators.

[0024] Example 2, based on Example 1, such as Figures 1-5 As shown, an electromagnetic heating ring 51 for preheating the shaft end 61 and shaft rod 62 is installed inside the ring frame 42; a middle retaining ring 52 for protecting the electromagnetic heating ring 51 is fixed to the rear side of the ring frame 42 to prevent a large amount of welding slag generated by the laser welding gun 43 from splashing onto the electromagnetic heating ring 51 during laser welding; a temperature sensor 53 is installed on the front side of the ring frame 42.

[0025] In this embodiment, following the steps described above, the shaft end 61 and shaft rod 62 are respectively fixed between the fixing mechanism and the two electrically controlled clamping plates 31. The electric slider 41 drives the laser positioning sensor 44 on the ring frame 42 to scan in the front-back direction. The laser positioning sensor 44 automatically positions the area to be welded between the shaft end 61 and shaft rod 62. Then, the electric slider 41 moves to control the electromagnetic heating ring 51 inside the ring frame 42 to align with the area to be welded between the shaft end 61 and shaft rod 62. The electromagnetic heating ring 51 preheats the area to be welded between the shaft end 61 and shaft rod 62. Afterwards, the electric slider 41 drives the ring frame 51 to align with the area to be welded between the shaft end 61 and shaft rod 62. The laser welding gun 43 on the frame 42 is aligned with the area to be welded between the shaft end 61 and the shaft rod 62, and laser welding is performed on the shaft end 61 and the shaft rod 62 according to the operation steps of the above embodiment. In this embodiment, the electromagnetic heating ring 51 can be automatically controlled to position and move to the area to be welded between the shaft end 61 and the shaft rod 62 for preheating. At the same time, the temperature sensor 53 monitors the preheating temperature of the shaft rod 62 and observes whether the preheating temperature of the shaft rod 62 is kept within the set range, which effectively reduces the risk of welding cracks during the welding process, and effectively improves the weld structure properties and optimizes the overall structural strength of the welding area between the shaft end 61 and the shaft rod 62.

[0026] In addition, in extremely cold weather conditions, during the initial cutting process of shaft tube repair, before cutting the old shaft rod 62 from the shaft end 61, the area to be cut between the shaft end 61 and the old shaft rod 62 can be preheated using the electromagnetic heating ring 51 according to the above steps. In this embodiment, preheating the area to be cut between the shaft end 61 and the old shaft rod 62 using the electromagnetic heating ring 51 before cutting in extremely cold weather can effectively avoid the increased brittleness of the material caused by the low temperature environment, significantly reduce the risk of cold cracks or heat-affected zone hardening during the cutting process, and at the same time, preheating can make the temperature of the cutting area rise evenly, reduce the temperature difference between the local rapid heating during cutting and the surrounding low-temperature base material, thereby suppressing thermal stress and cutting deformation, ensuring a flat cutting surface, reducing the amount of subsequent cleaning work, and preventing abnormal wear of cutting tools or equipment caused by low temperature impact. This preheating measure is convenient to operate and has good controllability, providing reliable quality assurance for shaft tube repair in extremely cold conditions.

[0027] Example 3, based on Example 1, such as Figures 1-7 As shown, the fixing mechanism includes a hanging plate 21, a fixing pin 22, a plug rod 23, a movable ring 24, a pull rod 25, a clamping block 26, and a tension spring 27. Several fixing holes 6101 for fixing the brake disc are provided on the shaft end 61 of the shaft tube. Before performing maintenance work on the shaft tube, the brake disc needs to be removed from the fixing holes 6101 on the shaft end 61. The rotating component of the rear electric rotating ring 2 is detachably mounted with the hanging plate 21. Four fixing pins 22 are inserted between the rotating component of the rear electric rotating ring 2 and the hanging plate 21. The hanging plate 21 is initially fixed to the rotating component of the rear electric rotating ring 2 by the quick-release fixing pins 22. The hanging plate 21 has four plug holes 2101, and the plug holes 2101 are respectively aligned with the fixing holes 6101 on the shaft end 61. Each insertion hole structure 2101 of the hanging plate 21 and the corresponding fixing hole structure 6101 in the shaft end 61 are connected by a common insertion rod 23. The hanging plate 21 is initially fixed to the shaft end 61 by the insertion rod 23. A movable ring 24 is fixedly connected to the front end of all insertion rods 23. The movable ring 24 is initially in close contact with the hanging plate 21. The movable ring 24 is slidably connected to two upper and lower pull rods 25. A clamping block 26 is fixedly connected to each of the two pull rods 25, and the clamping block 26 is located inside the movable ring 24. A tension spring 27 is fixedly connected between each of the two pull rods 25 and the movable ring 24. The clamping block 26 is made of high temperature resistant, fireproof and flame retardant rubber material to prevent the high temperature shaft end 61 from burning the clamping block 26 during the clamping process. Several anti-slip texture structures 2601 are provided on the opposite sides of the two clamping blocks 26.

[0028] In this embodiment, the worker pulls the two upper and lower levers 25, causing the clamping blocks 26 to move away from each other. Simultaneously, the levers 25 stretch the tension spring 27, generating elastic force to open the two clamping blocks 26. Then, the support frame 1 moves, causing the fixing mechanism in the rear electric rotating ring 2 to move towards the shaft end 61. The movable ring 24 and the hanging plate 21 are placed on the outside of the shaft end 61, allowing the shaft end 61 to be inserted between the two open clamping blocks 26. Four insert rods 23 are inserted between the insertion hole structure 2101 of the hanging plate 21 and the corresponding fixing hole structure 6101 in the shaft end 61, fixing the hanging plate 21 to the shaft end 61 via the insert rods 23. Afterward, the two levers 25 are released, and the stretched tension spring 27 pulls the levers 25, causing the clamping blocks 26 to clamp onto the surface of the shaft end 61, thus fixing the fixing mechanism to the shaft end 61. Figure 8 As shown, after the shaft 62 is pressed tightly against the end face of the shaft end 61 and the shaft 62 is fixed between the two electronically controlled clamps 31, the shaft end 61 and the shaft 62 can be laser welded according to the operation steps of the above embodiment.

[0029] After completing the laser welding work between the shaft end 61 and the shaft rod 62, the electric slider 41 drives the laser welding gun 43 on the ring frame 42 forward away from the welding area between the shaft end 61 and the shaft rod 62. The worker then pulls the two levers 25 again to open the two clamps 26. At the same time, the levers 25 drive the tension spring 27 to stretch, causing the clamps 26 to release the shaft end 61. Then, the worker pulls the movable ring 24 to move the insertion rod 23 forward until the two clamps 26 are moved to align with the outer surface of the shaft rod 62. At this time, the insertion rod 23 remains inserted between the insertion hole structure 2101 of the hanging plate 21 and the corresponding fixing hole structure 6101 in the shaft end 61. The worker then releases the two levers 25. Rod 25, simultaneously pulled by tension spring 27, causes clamping block 26 to clamp onto the surface of shaft 62. At this time, the fixing mechanism is fixed to shaft end 61 by insert rod 23, and the fixing mechanism fixes shaft 62 by clamping block 26. Then, the operator pulls the fixing pin 22 out from between the rotating part of the rear electric rotating ring 2 and the hanging plate 21, so that the hanging plate 21 can be detached from the rotating part of the rear electric rotating ring 2. Finally, the operator loosens the electric control clamping plate 31 on shaft 62, so that all parts of this welding equipment except the fixing mechanism can be removed from shaft end 61 and shaft 62, leaving only the fixing mechanism to firmly fix shaft 62 to shaft end 61. Figure 9 As shown, after the welding area between the shaft rod 62 and the shaft end 61 has completely cooled, the worker can install a new fixing mechanism on the removed welding equipment, and then perform laser welding on the shaft end 61 of the next large freight truck and the new shaft rod 62 according to the operation steps of the above embodiment.

[0030] In this embodiment, after welding is completed, the fixed mechanism that is detached separately can still maintain the rigid connection between the shaft 62 and the shaft end 61 during the welding cooling period. After the new fixed mechanism is installed on the removed welding equipment, it can be quickly put into the next laser welding operation with the same maintenance process. This realizes multi-station parallel operation, greatly shortens the idle time of the welding equipment waiting for cooling, significantly improves the work efficiency of large-scale freight vehicle maintenance, is simple and reliable to operate, and effectively ensures the welding positioning accuracy and weld quality.

[0031] It should be understood that the above description is for illustrative purposes only and is not intended to limit the invention. Those skilled in the art will understand that variations of the invention are included within the scope of the claims herein.

Claims

1. An automatic positioning welding equipment for automotive parts, comprising a support frame (1); a main flame deflector (12) is fixedly connected to the rear side of the support frame (1); characterized in that, It also includes a rear electric rotating ring (2); the rear electric rotating ring (2) is installed on the support frame (1); a fixing mechanism for fixing the shaft end (61) is fixedly connected to the rotating part of the rear electric rotating ring (2); a front electric rotating ring (3) is installed on the front side of the support frame (1), and the rotation axis of the front electric rotating ring (3) is aligned with the rotation axis of the rear electric rotating ring (2); two electrically controlled clamps (31) for fixing the shaft (62) are fixedly connected to the rotating part of the front electric rotating ring (3); two electric sliders (41) are slidably connected to the support frame (1); a ring frame (42) is fixedly connected between the two electric sliders (41), and the ring frame (42) is located between the rear electric rotating ring (2) and the front electric rotating ring (3); a laser welding gun (43) is installed on the ring frame (42); a laser positioning sensor (44) for automatic positioning is installed on the ring frame (42).

2. The automatic positioning automotive parts welding equipment according to claim 1, characterized in that, Four adjustable casters (11) are installed under the support frame (1) to adjust the height of the support frame (1).

3. The automatic positioning automotive parts welding equipment according to claim 1, characterized in that, A rear retaining ring (28) is fixedly connected to the rotating part of the rear electric rotating ring (2); a front retaining ring (32) is fixedly connected to the rotating part of the front electric rotating ring (3).

4. The automatic positioning automotive parts welding equipment according to claim 1, characterized in that, An electromagnetic heating ring (51) is installed inside the ring frame (42).

5. The automatic positioning automotive parts welding equipment according to claim 4, characterized in that, A central retaining ring (52) for protecting the electromagnetic heating ring (51) is fixed to the rear side of the ring frame (42).

6. The automatic positioning automotive parts welding equipment according to claim 4, characterized in that, A temperature sensor (53) is installed on the ring frame (42) to monitor the preheating temperature of the shaft (62).

7. An automatic positioning welding equipment for automotive parts according to any one of claims 1-6, characterized in that, The fixing mechanism includes a hanging plate (21), a fixing pin (22), a plug rod (23), and a movable ring (24); the rotating part of the rear electric rotating ring (2) is detachably hung with the hanging plate (21); a fixing pin (22) is inserted between the rotating part of the rear electric rotating ring (2) and the hanging plate (21); the hanging plate (21) has at least four insertion hole structures (2101), and the insertion hole structures (2101) are aligned with the fixing hole structures (6101) of the shaft end (61); a plug rod (23) is inserted between the insertion hole structure (2101) of the hanging plate (21) and the corresponding fixing hole structure (6101) in the shaft end (61); a movable ring (24) is fixedly connected between the front ends of all the plug rods (23).

8. The automatic positioning automotive parts welding equipment according to claim 7, characterized in that, The movable ring (24) is slidably connected to two upper and lower pull rods (25); a clamp (26) is fixedly connected to the pull rod (25), and the clamp (26) is located inside the movable ring (24); a tension spring (27) is fixedly connected between the pull rod (25) and the movable ring (24).

9. The automatic positioning automotive parts welding equipment according to claim 8, characterized in that, The clamping block (26) is made of high-temperature resistant, fireproof and flame-retardant rubber material.

10. The automatic positioning automotive parts welding equipment according to claim 8, characterized in that, Each of the two clamping blocks (26) has several anti-slip textured structures (2601) on its opposite sides.

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