Welding device for automobile exhaust pipe machining

Abstract

The utility model belongs to the technical field of automobile machining welding, and particularly relates to a welding device for automobile exhaust pipe machining, which comprises a bottom plate, an electric guide rail is fixedly connected to the upper surface of the bottom plate, an L-shaped plate is arranged above the electric guide rail, and a clamping mechanism is fixedly connected above the L-shaped plate. A fixing ring is fixedly connected to the interior of the fixing seat, and a fixing mechanism is rotationally connected to the inner ring of the fixing ring; and a driving motor is fixedly connected to the interior of the shell, the output end of the driving motor is fixedly connected with a third gear, and the third gear is meshed with the fixing mechanism. According to the exhaust pipe welding device, the exhaust pipe and a part needing to be welded to the exhaust pipe are fixed through the clamping mechanism and the fixing mechanism respectively, the driving motor drives the fixing mechanism to rotate after preliminary welding, then the exhaust pipe and the part are driven to rotate synchronously, and welding is conducted continuously while rotation is conducted; and the welding gun can conduct comprehensive welding operation on the exhaust pipe, and the welding work efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile processing and welding, and particularly relates to a welding device for automobile exhaust pipe processing. Background Art

[0002] The automobile exhaust pipe is a component connected after the engine exhaust manifold. Its main function is to discharge the exhaust gas generated after the engine combustion from the engine and direct it to the exhaust pipe opening at the rear of the automobile for emission into the external environment. The exhaust pipe plays a key role in emission control during vehicle operation and also affects the engine performance and sound tuning. The automobile exhaust pipe usually consists of multiple segments, and these components need to be precisely assembled and connected. Welding is a common method used to fix the various components of the exhaust pipe (such as elbows, intermediate segments, etc.) together to ensure sealing and structural stability. Moreover, the exhaust pipe needs to withstand harsh working environments such as high temperature, vibration, and corrosion. Through welding, the sealing between components can be achieved to prevent gas leakage, and at the same time, the durability and structural strength of the exhaust pipe can be improved.

[0003] In the prior art, most automobile exhaust pipe welding devices can usually only weld in a single direction. If more comprehensive welding of the exhaust pipe is required, after partial welding is completed, the exhaust pipe needs to be manually rotated, adjusted to a suitable position, and then the next welding is carried out until the exhaust pipe rotates one week and the welding work is completed, resulting in a reduction in work efficiency. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a welding device for automobile exhaust pipe processing, which can make the automobile exhaust pipe rotate automatically during the welding process. By fixing the exhaust pipe and parts to be welded, and then setting the welding gun to be stationary at a fixed position and making the exhaust pipe rotate, the exhaust pipe can be welded without pausing to adjust the angle and then welding again, thereby improving the work efficiency of welding.

[0005] The technical solution adopted by the utility model is specifically as follows:

[0006] A welding device for automobile exhaust pipe processing, which is applied to a welding machine. The welding machine has a welding gun and includes a bottom plate. The upper surface of the bottom plate is fixedly connected with an electric guide rail. An L-shaped plate is arranged above the electric guide rail. A clamping mechanism is fixedly connected above the L-shaped plate. A fixed seat is arranged on the upper surface of the bottom plate. A fixed ring is fixedly connected inside the fixed seat. The inner ring of the fixed ring is rotatably connected with a fixing mechanism; it further includes:

[0007] A housing, inside which a driving motor is fixedly connected. The output end of the driving motor is fixedly connected with a third gear, and the third gear meshes with the fixing mechanism to drive the fixing mechanism to rotate.

[0008] In a preferred embodiment, the clamping mechanism includes a cylinder, the cylinder is fixedly connected to the L-shaped plate, the output end of the cylinder is fixedly connected to a bracket, a connecting rod is slidably connected inside the bracket, a fixing column is rotatably connected inside the connecting rod, the fixing column is fixedly connected to the L-shaped plate, a connecting block is fixedly connected to the top end of the connecting rod, a clamping ring is fixedly connected to one side of the connecting block, and a plurality of rollers are equidistantly distributed on the inner ring of the clamping ring.

[0009] In a preferred embodiment, the fixing mechanism includes an annular shell, the annular shell is rotatably arranged inside the inner ring of the fixing ring, a first ring plate is fixedly connected inside the annular shell, a second ring plate is fixedly connected inside the annular shell, the first ring plate is fixed to the second ring plate through ears arranged on the outer edge, and a gap is arranged between the first ring plate and the second ring plate. A servo motor is fixedly connected to the outer edge of the first ring plate, the output end of the servo motor is fixedly connected to a first gear, a toothed ring is meshed with the outer wall of the first gear, a second gear is meshed with the inner ring of the toothed ring, and an arc plate is fixedly connected to one side of the second gear.

[0010] In a preferred embodiment, a hole for the sliding of the connecting rod is formed on the bracket, and the connecting rod is slidably arranged in the hole.

[0011] In a preferred embodiment, the toothed ring is rotatably arranged in the gap between the first ring plate and the second ring plate, teeth meshing with the first gear are locally arranged on the outer periphery of the toothed ring for the first gear to drive the toothed ring to rotate, and a plurality of the second gears are sequentially meshed with the inner ring of the toothed ring.

[0012] In a preferred embodiment, the arc plate is in the shape of a blade, and a plurality of the arc plates are combined to form an annular structure together.

[0013] In a preferred embodiment, a tripod is fixedly connected to one side of the fixed seat through bolts, a housing is fixedly connected to the upper surface of the tripod, and the driving motor is fixedly connected to the housing.

[0014] In a preferred embodiment, teeth meshing with the third gear are arranged on the outer wall of the fixing mechanism for the third gear to drive the fixing mechanism to rotate, and a groove with the same height as the teeth on the surface of the fixing mechanism is formed in the fixed seat for the rotation of the fixing mechanism.

[0015] The technical effects achieved by the present utility model are:

[0016] A welding device for processing automobile exhaust pipes according to the present utility model fixes the exhaust pipe and the parts to be welded to the exhaust pipe respectively through a clamping mechanism and a fixing mechanism, preventing deviation during the welding process. Then, after preliminary welding, the driving motor drives the fixing mechanism to rotate, thereby driving the exhaust pipe and the parts to rotate synchronously, and continuously welding while rotating, so that the welding gun can perform a comprehensive welding operation on the exhaust pipe, improving the working efficiency of welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a perspective view of the present utility model;

[0018] Figure 2 is a second perspective view of the present utility model;

[0019] Figure 3 is a schematic diagram of the clamping mechanism of the present utility model;

[0020] Figure 4 is a partial structural schematic diagram of the clamping mechanism of the present utility model;

[0021] Figure 5 is a schematic diagram of the fixing mechanism of the present utility model;

[0022] Figure 6 is a schematic diagram of the interior of the fixing mechanism of the present utility model;

[0023] Figure 7 is a partial structural schematic diagram of the fixing mechanism of the present utility model.

[0024] In the drawings, the list of components represented by each reference numeral is as follows:

[0025] 1, bottom plate; 2, electric guide rail; 3, clamping mechanism; 301, cylinder; 302, bracket; 303, connecting rod; 304, fixed column; 305, connecting block; 306, clamping ring; 307, roller; 4, fixed seat; 5, fixing ring; 6, fixing mechanism; 601, annular shell; 602, first ring plate; 603, second ring plate; 604, servo motor; 605, first gear; 606, toothed ring; 607, second gear; 608, arc plate; 7, tripod; 8, outer shell; 9, driving motor; 10, third gear; 11, exhaust pipe; 12, L-shaped plate; 13, welding gun. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] In order to make the above objects, features, and advantages of the present utility model more obvious and understandable, the following detailed description of the specific embodiments of the present utility model will be made in conjunction with the drawings in the specification.

[0027] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. However, the present utility model may also be implemented in other ways different from those described herein. Those skilled in the art may make similar extensions without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0028] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation manner of the present utility model. The phrase "in a preferred embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0029] Thirdly, the present utility model is described in detail in conjunction with schematic diagrams. When detailing the embodiments of the present utility model, for the sake of convenience of explanation, the cross-sectional views showing the device structure will be enlarged locally out of the general proportion, and the schematic diagrams are only examples and should not limit the scope of protection of the present utility model herein. In addition, in actual production, three-dimensional spatial dimensions including length, width, and depth should be included.

[0030] As Figure 1 - Figure 2 and Figure 5 shown, a welding device for processing an automobile exhaust pipe is applied to a welding machine. The welding machine has a welding gun 13 and includes a bottom plate 1. A motorized guide rail 2 is fixedly connected to the upper surface of the bottom plate 1. An L-shaped plate 12 is arranged above the motorized guide rail 2. A clamping mechanism 3 is fixedly connected above the L-shaped plate 12. A fixed seat 4 is arranged on the upper surface of the bottom plate 1. A fixed ring 5 is fixedly connected inside the fixed seat 4. The inner ring of the fixed ring 5 is rotatably connected to a fixing mechanism 6; it further includes:

[0031] A housing 8. A drive motor 9 is fixedly connected inside the housing 8. The output end of the drive motor 9 is fixedly connected to a third gear 10. The third gear 10 meshes with the fixing mechanism 6 and is used to drive the fixing mechanism 6 to rotate.

[0032] In the above-described embodiment, when the device is needed to weld the automobile exhaust pipe 11, first place the exhaust pipe 11 in the middle of the fixing mechanism 6, and then start the fixing mechanism 6 so that the exhaust pipe 11 can be fixed. Then place the parts to be welded together in the gap formed between the two clamping rings 306, and then start the clamping mechanism 3 to make the cylinder 301 work. When the cylinder 301 works, it can push the bracket 302, so that the bottom end of the connecting rod 303 can slide in the hole opened on the bracket 302. The connecting rod 303 is fixed to the L-shaped plate 12 through the fixing column 304. Therefore, when the bottom end of the connecting rod 303 slides inside the bracket 302, it can drive the upper ends of the connecting rod 303 to approach or move away from each other. Furthermore, it can drive the two clamping rings 306 to approach or move away through the connecting block 305. When the two clamping rings 306 approach each other, the parts can be fixed within the clamping rings 306. Then move the clamping mechanism 3 and the parts in the direction of approaching or moving away from the exhaust pipe 11 through the electric guide rail 2, so that the welding ends of the parts can contact the welding positions of the exhaust pipe 11 clamped and fixed. Then use the welding gun 13 to weld the exhaust pipe 11 and the parts, and weld some parts of the exhaust pipe 11 and the parts together first. Then start the driving motor 9. When the driving motor 9 works, it can drive the third gear 10 to rotate. When the third gear 10 rotates, it can drive the fixing mechanism 6 to rotate through the teeth arranged outside the fixing mechanism 6, and then drive the exhaust pipe 11 fixed by the fixing mechanism 6 to rotate. Because some parts of the contact part between the parts and the exhaust pipe 11 are welded together, and the roller 307 is arranged inside the clamping ring 306. When the exhaust pipe 11 rotates, it can drive the parts fixed by the clamping mechanism 3 to rotate synchronously. When the exhaust pipe 11 rotates, the welding gun 13 keeps working. When the exhaust pipe 11 rotates one week, the welding work can be completed. Then turn off the driving motor 9, and the cylinder 301 retracts to make the clamping rings 306 move away from each other. Then drive the arc plate 608 to retract inward by the reverse rotation of the first gear 605, so that the welded exhaust pipe 11 can be drawn out from the fixing mechanism 6. The fixing ring 5 is fixed to the fixing seat 4, and the fixing mechanism 6 is provided with a chute matching the fixing ring 5. When the fixing mechanism 6 rotates, the fixing ring 5 can play a limiting role on the fixing mechanism 6 to prevent the fixing mechanism 6 from deviating during the rotation process. Moreover, a groove is opened on the upper part of the fixing seat 4, so that the fixing mechanism 6 can rotate on the fixing seat 4 without being affected.

[0033] As Figure 3 - Figure 4As shown in the figure, the clamping mechanism 3 includes a cylinder 301. The cylinder 301 is fixedly connected to the L-shaped plate 12. The output end of the cylinder 301 is fixedly connected to a bracket 302. A connecting rod 303 is slidably connected inside the bracket 302. A fixed column 304 is rotatably connected inside the connecting rod 303. The fixed column 304 is fixedly connected to the L-shaped plate 12. The top end of the connecting rod 303 is fixedly connected to a connecting block 305. One side of the connecting block 305 is fixedly connected to a clamping ring 306. A plurality of rollers 307 are arranged at equal intervals on the inner ring of the clamping ring 306.

[0034] In the above embodiment, when it is necessary to fix the parts to be welded, the parts are placed between the two clamping rings 306, and then the cylinder 301 is started, so that the cylinder 301 can push the bracket 302, enabling the connecting rod 303 to slide inside the bracket 302. The connecting rod 303 is fixed to the L-shaped plate 12 through the fixed column 304. Therefore, when the bottom end of the connecting rod 303 slides inside the bracket 302, it can drive the upper ends of the connecting rod 303 to approach or move away from each other. Furthermore, it can drive the two clamping rings 306 to approach or move away through the connecting block 305. When the two clamping rings 306 approach each other, the parts can be fixed inside the clamping rings 306. A plurality of rollers 307 are arranged at equal intervals inside the clamping rings 306. The rollers 307 are in contact with the welded parts. After the exhaust pipe 11 is initially welded to the parts, the exhaust pipe 11 rotates driven by the drive motor 9, and the parts placed inside the clamping rings 306 will also rotate accordingly. When the parts rotate, the rollers 307 also rotate inside the clamping rings 306. By arranging the rollers 307 inside the clamping rings 306, the rotation of the parts is made smoother.

[0035] As Figure 5 - Figure 7 As shown in the figure, the fixing mechanism 6 includes an annular shell 601. The annular shell 601 is rotatably arranged inside the inner ring of the fixing ring 5. A first ring plate 602 is fixedly connected inside the annular shell 601. A second ring plate 603 is fixedly connected inside the annular shell 601. The first ring plate 602 is fixed to the second ring plate 603 through the ears arranged on the outer edge, and there is a gap between the first ring plate 602 and the second ring plate 603. The outer edge of the first ring plate 602 is fixedly connected to a servo motor 604. The output end of the servo motor 604 is fixedly connected to a first gear 605. The outer wall of the first gear 605 is meshed with a gear ring 606. The inner ring of the gear ring 606 is meshed with a second gear 607. One side of the second gear 607 is fixedly connected to an arc plate 608.

[0036] In the above-described embodiment, a chute matching the fixing ring 5 is provided on the annular shell 601 to prevent the fixing mechanism 6 from falling off during rotation. When it is necessary to fix the exhaust pipe 11, the servo motor 604 provided at the outer edge of the first ring plate 602 is started. The operation of the servo motor 604 can drive the first gear 605 to rotate. When the first gear 605 rotates, the teeth provided on the outer periphery of the ring gear 606 that mesh with the first gear 605 can cause the ring gear 606 to rotate. The ring gear 606 is disposed in the gap between the first ring plate 602 and the second ring plate 603. When the ring gear 606 rotates, it can drive the second gear 607 to rotate. The arc plate 608 is fixed to the second gear 607. When the second gear 607 rotates, the arc plate 608 will rotate accordingly, so that the arc plate 608 can then fix the exhaust pipe 11.

[0037] As Figure 4 shown, holes for the sliding of the connecting rod 303 are provided on the bracket 302, and the connecting rod 303 is slidably disposed in the holes.

[0038] In the above-described embodiment, inclined sliding holes are respectively provided on both sides of the bracket 302, so that the connecting rod 303 can slide in the holes, and the inclined sliding holes can cause the connecting rod 303 to swing left and right during sliding, so that the clamping ring 306 opens and closes.

[0039] As Figure 2 shown, the ring gear 606 is rotatably disposed in the gap between the first ring plate 602 and the second ring plate 603. A part of the outer periphery of the ring gear 606 is provided with teeth meshing with the first gear 605 for the first gear 605 to drive the ring gear 606 to rotate, and a plurality of second gears 607 are sequentially meshed and connected to the inner ring of the ring gear 606.

[0040] In the above-described embodiment, the first ring plate 602 and the second ring plate 603 are fixed by ears on both sides of the outer periphery. A gap is formed between the first ring plate 602 and the second ring plate 603 for placing the ring gear 606 and the arc plate 608, etc. A section of teeth that can mesh with the first gear 605 is provided at the contact part between the outer periphery of the ring gear 606 and the first gear 605, so that the first gear 605 can drive the ring gear 606 to rotate while rotating. A plurality of second gears 607 are circumferentially meshed around the inner ring of the ring gear 606, and a blade-shaped arc plate 608 is fixed on the upper surface of each second gear 607 and is evenly distributed on the inner ring of the ring gear 606 and can rotate synchronously.

[0041] As Figure 7 shown, the arc plate 608 is blade-shaped, and a plurality of arc plates 608 are combined to form an annular structure together.

[0042] In the above-described embodiment, the shape of the arc plate 608 is blade-shaped. Each arc plate 608 is in contact with each other, and a plurality of arc plates 608 are combined into an annular structure for fixing the exhaust pipe 11.

[0043] As Figure 2 shown, one side of the fixed seat 4 is fixedly connected with a tripod 7 through bolts. The upper surface of the tripod 7 is fixedly connected with a housing 8, and the driving motor 9 is fixedly connected with the housing 8.

[0044] In the above embodiment, by arranging the tripod 7 on one side of the fixed seat 4, the housing 8 can be fixed. The driving motor 9 is fixed inside the housing 8, which can shield the driving motor 9 and the third gear 10. And an opening is provided on one side of the housing 8 adjacent to the fixing mechanism 6, so that the third gear 10 can be engaged with the gear on the outer periphery of the fixing mechanism 6.

[0045] As Figure 5 shown, teeth meshing with the third gear 10 are provided on the outer wall of the fixing mechanism 6 for the third gear 10 to drive the fixing mechanism 6 to rotate. And a groove with the same height as the teeth on the surface of the fixing mechanism 6 is opened in the fixed seat 4 for the fixing mechanism 6 to rotate.

[0046] In the above embodiment, a circle of teeth is provided on the outer periphery of the fixing mechanism 6, so that when the third gear 10 rotates, it can drive the fixing mechanism 6 to rotate through the teeth provided on the outer periphery of the fixing mechanism 6, and then drive the exhaust pipe 11 to rotate, making the welding more comprehensive. A groove with the same height as the teeth on the surface of the fixing mechanism 6 is opened in the upper part of the fixed seat 4, so that the fixing mechanism 6 is not blocked when rotating.

[0047] The working principle of the present utility model is as follows: When the welding device needs to be used, the exhaust pipe 11 is placed in the middle of the fixing mechanism 6, and then the servo motor 604 is started to drive the first gear 605 to rotate. When the first gear 605 rotates, it can drive the gear ring 606 to rotate, and further drive the second gears 607 distributed in the inner ring of the gear ring 606 to rotate. When the second gears 607 rotate, they can drive the arc plates 608 to rotate. There are several second gears 607 meshed with the inner ring of the gear ring 606. When the gear ring 606 rotates, it can drive the second gears 607 in the inner ring to rotate simultaneously, and then drive multiple arc plates 608 to rotate, thereby fixing the exhaust pipe 11. Then, the parts to be welded together are placed in the gap formed between the two clamping rings 306, and then the air cylinder 301 is started. When the air cylinder 301 works, it can push the bracket 302, so that the bottom end of the connecting rod 303 can slide in the hole opened on the bracket 302. The connecting rod 303 is fixed to the L-shaped plate 12 through the fixing column 304. Therefore, when the bottom end of the connecting rod 303 slides inside the bracket 302, it can drive the upper ends of the connecting rod 303 to approach or move away from each other, and then drive the two clamping rings 306 to approach or move away through the connecting block 305. When the two clamping rings 306 approach each other, the parts can be fixed in the clamping rings 306. Then, the clamping mechanism 3 and the parts are moved by the electric guide rail 2 in the direction of approaching or moving away from the exhaust pipe 11, so that the welding ends of the parts can contact the welding positions of the exhaust pipe 11 clamped and fixed. Then, the welding gun 13 is used to weld the exhaust pipe 11 and the parts, and part of the positions of the exhaust pipe 11 and the parts are welded together first. Then, the driving motor 9 is started. When the driving motor 9 works, it can drive the third gear 10 to rotate. When the third gear 10 rotates, it can drive the fixing mechanism 6 to rotate through the teeth arranged outside the fixing mechanism 6, and then drive the exhaust pipe 11 fixed by the fixing mechanism 6 to rotate. Because part of the contact part between the parts and the exhaust pipe 11 is welded together, and there are rollers 307 arranged inside the clamping rings 306. When the exhaust pipe 11 rotates, it can drive the parts fixed by the clamping mechanism 3 to rotate synchronously. When the exhaust pipe 11 rotates, the welding gun 13 keeps working. When the exhaust pipe 11 rotates one week, the welding work can be completed. Then, the driving motor 9 is turned off, the air cylinder 301 retracts to make the clamping rings 306 move away from each other, and then the arc plates 608 are retracted inward by the reverse rotation of the first gear 605, so that the welded exhaust pipe 11 can be taken out from the fixing mechanism 6.

[0048] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present utility model. The structures, devices, and operation methods not specifically described and explained in the present utility model are implemented according to the conventional means in this field without special explanation and limitation.

Claims

1. A welding device for processing automobile exhaust pipes, applied to a welding machine, the welding machine having a welding gun (13), characterized in that: The invention comprises a bottom plate (1), the upper surface of the bottom plate (1) is fixedly connected to an electric guide rail (2), an L plate (12) is arranged above the electric guide rail (2), a clamping mechanism (3) is fixedly connected above the L plate (12), a fixing seat (4) is arranged on the upper surface of the bottom plate (1), a fixing ring (5) is fixedly connected inside the fixing seat (4), and the inner ring of the fixing ring (5) is rotatably connected to a fixing mechanism (6); and further comprises: A housing (8), wherein a driving motor (9) is fixedly connected to the interior of the housing (8), and a third gear (10) is fixedly connected to the output end of the driving motor (9), and the third gear (10) is meshed with the fixing mechanism (6) to drive the fixing mechanism (6) to rotate.

2. A welding device for processing automobile exhaust pipes according to claim 1, characterized in that: The clamping mechanism (3) comprises a cylinder (301), wherein the cylinder (301) is fixedly connected to the L-plate (12), the output end of the cylinder (301) is fixedly connected to a bracket (302), the bracket (302) is internally slidably connected to a connecting rod (303), the connecting rod (303) is internally rotatably connected to a fixed column (304), the fixed column (304) is fixedly connected to the L-plate (12), the top end of the connecting rod (303) is fixedly connected to a connecting block (305), one side of the connecting block (305) is fixedly connected to a clamping ring (306), and the inner ring of the clamping ring (306) is provided with a plurality of rollers (307) distributed at equal intervals.

3. A welding device for automobile exhaust pipe processing according to claim 1, characterized in that: The fixing mechanism (6) comprises an annular shell (601), wherein the annular shell (601) is rotatably arranged on the inner ring of the fixing ring (5), a first ring plate (602) is fixedly connected to the inside of the annular shell (601), a second ring plate (603) is fixedly connected to the inside of the annular shell (601), the first ring plate (602) is fixed to the second ring plate (603) via ears arranged on the outer edge, and a gap is arranged between the first ring plate (602) and the second ring plate (603), a servo motor (604) is fixedly connected to the outer edge of the first ring plate (602), an output end of the servo motor (604) is fixedly connected to a first gear (605), an outer wall of the first gear (605) is meshedly connected to a gear ring (606), an inner ring of the gear ring (606) is meshedly connected to a second gear (607), and an arc plate (608) is fixedly connected to one side of the second gear (607).

4. A welding device for processing automobile exhaust pipes according to claim 2, characterized in that: The bracket (302) is provided with a hole for the connecting rod (303) to slide, and the connecting rod (303) is slidably arranged in the hole.

5. The welding device for processing automobile exhaust pipes according to claim 3, characterized in that: The gear ring (606) is rotatably arranged in the gap between the first ring plate (602) and the second ring plate (603); teeth meshing with the first gear (605) are partially arranged on the outer periphery of the gear ring (606), so that the first gear (605) drives the gear ring (606) to rotate, and a plurality of second gears (607) are meshed and connected to the inner ring of the gear ring (606) in sequence.

6. A welding device for processing automobile exhaust pipes according to claim 3, characterized in that: The arc plate (608) is in the shape of a blade, and a plurality of the arc plates (608) are combined to form an annular structure.

7. The welding device for automobile exhaust pipe processing according to claim 1, characterized in that: One side of the fixing seat (4) is fixedly connected to a tripod (7) via bolts, the upper surface of the tripod (7) is fixedly connected to a housing (8), and the driving motor (9) is fixedly connected to the housing (8).

8. The welding device for processing automobile exhaust pipes according to claim 1, characterized in that: The outer wall of the fixing mechanism (6) is provided with teeth meshing with the third gear (10), so that the third gear (10) drives the fixing mechanism (6) to rotate, and the fixing seat (4) is provided with a groove having the same height as the teeth on the surface of the fixing mechanism (6), so that the fixing mechanism (6) can rotate.

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