Spin welding device for mechanical manufacturing

Abstract

The invention belongs to the field of mechanical manufacturing, and particularly relates to a rotary welding device for mechanical manufacturing, which comprises a base, an upper groove and a concentric-square-shaped groove are formed in the upper surface of the base, the upper groove is arranged in the middle of the concentric-square-shaped groove, a synchronous transmission assembly is arranged in the upper groove, and the synchronous transmission assembly comprises a shifting plate. The two shifting plates are slidably connected into the upper groove, and a rotary clamping structure is arranged between the side faces, close to each other, of the two shifting plates. A synchronous transmission assembly is arranged in an upper groove, a first motor drives a transmission gear to rotate, the transmission gear can drive transmission rods on the two sides to slide in the upper groove, and the transmission rods can drive shifting plates on the two sides to move in the upper groove in the same direction or opposite directions at the same time; and therefore, the relative displacement speed of the tubular parts at the two ends is increased, and the machining speed is higher.

Description

Technical Field

[0001] The invention belongs to the field of mechanical manufacturing, and in particular relates to a rotary welding device for mechanical manufacturing. Background Art

[0002] Mechanical manufacturing refers to the process of processing, handling and manufacturing various mechanical products from raw materials through manpower or automated equipment using mechanical processing, assembly and other process technologies. It covers all links from design to production, involving material selection, processing technology, equipment application, quality control and other aspects.

[0003] Spin welding is a common welding technology, mainly used to connect different materials or workpieces. During the spin welding process, the workpiece to be welded will rotate at a certain speed, usually driven by a rotating device, and the welding electrode or heat source will remain in a fixed position and contact the rotating workpiece surface, melting the material by generating high temperature, thereby completing the welding task. Spin welding technology is widely used in the welding of pipes, containers, circular structures, etc., and is particularly suitable for efficient and precise circular joint connections.

[0004] The existing publication number CN118492777A discloses a rotary welding device for mechanical manufacturing, including an operating panel, wherein the four corners of the lower surface of the operating panel are fixedly connected to support legs, a fixed platform is fixedly installed in the middle of the left side of the upper surface of the operating panel, a control device is fixedly installed in the middle of the upper front of the fixed platform, a rotating mechanism is arranged on one side of the fixed platform, the rotating mechanism includes a placing plate, one side of the placing plate is fixedly connected to the upper left side of the fixed platform, a motor is fixedly installed on the upper surface of the placing plate, a rotating rod is arranged at one end of the motor, a threaded tube is fixedly connected to one end of the rotating rod, a first threaded head is arranged on the outside of the right side of the threaded tube, a clamping mechanism is arranged on the right side of the first threaded head, and the clamping mechanism includes a placing plate, and the middle of the left side of the placing plate is fixedly connected to the right side of the first threaded head.

[0005] The existing rotary welding devices for mechanical manufacturing still have the following shortcomings:

[0006] 1. When welding tubular parts, in order to ensure accurate welding, the ends of the two tubular parts need to be aligned and placed. In the process of the two tubular parts approaching each other, if only a single tubular part is moved closer, it is not conducive to increasing the speed of the tubular parts approaching each other.

[0007] 2. When welding tubular parts, if only one side of the tubular part is clamped and rotated, the centripetal force during the rotation process may easily cause the tubular part to bend, thereby affecting the accuracy of welding.

[0008] 3. When performing rotation welding on a long tubular part, on the one hand, there will always be centripetal force affecting the position of the tubular part. On the other hand, during the welding process, the contact between the welding gun and the tubular part is also likely to cause the displacement of the tubular part. Summary of the invention

[0009] The purpose of the present invention is to address the problem proposed in the above-mentioned background technology that in order to ensure accurate welding, the ends of the two tubular parts need to be aligned and placed, and in the process of the two tubular parts approaching each other, if only a single tubular part is displaced and approached, it is not conducive to improving the rate of approach of the tubular parts. Due to the existence of centripetal force during rotation, the tubular part is easily bent, thereby affecting the accuracy of welding. When rotary welding is performed on a tubular part with a long length, on the one hand, there is always the centripetal force that affects the position of the tubular part. On the other hand, during the welding process, the contact between the welding gun and the tubular part is also likely to cause the problem of displacement of the tubular part. A rotary welding device for mechanical manufacturing is provided.

[0010] To achieve the above-mentioned objectives, the present invention adopts the following technical solutions: a rotary welding device for mechanical manufacturing, comprising a base, an upper surface of the base is provided with an upper groove and a return groove, the upper groove is arranged in the middle of the return groove, a synchronous transmission assembly is arranged in the upper groove, the synchronous transmission assembly includes a shift plate, two shift plates are slidably connected in the upper groove, a rotating clamping structure is arranged between the sides of the two shift plates close to each other, a transmission rod is fixedly connected to the side of the shift plate, a plurality of No. 1 tooth grooves are arranged on the side of the transmission rod, a No. 1 motor is arranged in the base, the output end of the No. 1 motor passes through the inner bottom surface of the upper groove and is fixedly connected with a transmission gear, the transmission gear is meshed and connected in the No. 1 tooth groove, and a through groove is arranged on the inner side surface of the upper groove, and the through groove is arranged on the side close to the end of the transmission rod.

[0011] Furthermore, a slide rail is fixedly connected to the upper surface of the base, and two slide rails are arranged on both sides of the upper groove. Side fixing members are fixedly connected to both sides of the shift plate, and the ends of the side fixing members are slidably connected to the slide rails.

[0012] Furthermore, the rotating clamping structure includes a rotating disk, which is rotatably connected to the side of the shift plate, and three sliding grooves are arranged in a circular array on the side of the rotating disk away from the shift plate, and a clamping plate is slidably connected in the sliding groove. The side of the shift plate away from the rotating disk is fixedly connected to a No. 2 motor, and the output end of the No. 2 motor is fixedly connected to the side of the rotating disk.

[0013] Furthermore, a rotating assembly is provided in the return groove, and the rotating assembly includes a rotating gear. Both of the rotating gears are rotatably connected to the inner side surface of the return groove. A transmission belt is provided on the outer side of the rotating gear. Saw teeth are provided on the inner side of the transmission belt. The rotating gear is meshed and connected between the saw teeth. A threaded rod is fixedly connected to the side surface of the rotating gear, and the end of the threaded rod is rotatably connected to the inner side surface of the return groove away from the rotating gear. A No. 3 motor is fixedly connected to the outer side surface of the base, and the output end of the No. 3 motor is fixedly connected to the side surface of the rotating gear.

[0014] Furthermore, the threaded rod passes through and is threadedly connected to a slider, side blocks are fixedly connected on both sides of the slider, the threaded rod passes through and is threadedly connected to the side blocks, the lower surface of the slider is slidably connected to the inner bottom surface of the return groove, the upper surface of the slider is provided with a welding structure, and the upper surface of the side block is provided with a limited support structure.

[0015] Furthermore, the welding structure includes a fixed seat, which is fixedly connected to the upper surface of the slider, a rotating rod is rotatably connected inside the fixed seat, a No. 4 motor is fixedly connected to the outer side of the fixed seat, the output end of the No. 4 motor passes through the fixed seat and is fixedly connected to the side of the rotating rod, a slot is provided at the end of the rotating rod, a welding gun is engaged and connected in the slot, an arc-shaped clamping block is rotatably connected to the upper surface of the rotating rod via a rotating shaft, and the arc-shaped clamping blocks are provided on both sides of the slot.

[0016] Furthermore, the limiting support structure includes a fixed bent rod, and the ends of the two fixed bent rods close to each other are fixedly connected to an external ring, the inner side of the external ring is fixedly connected to an internal ring via a connecting plate, the inner side of the external ring is rotatably connected to an internal gear ring, the side of the external ring is rotatably connected to a gear shaft via a connecting bent rod, and the gear shaft is meshingly connected to the inner side of the internal gear ring.

[0017] Furthermore, the sides of the external ring and the internal ring are respectively provided with a No. 1 groove and a No. 2 groove, and a limiting slide rod is slidably connected in the No. 1 groove and the No. 2 groove. The side of the limiting slide rod is provided with a No. 2 tooth groove, and the gear shaft is meshingly connected in the No. 2 tooth groove.

[0018] Compared with the existing technology, the advantages of this rotary welding device for mechanical manufacturing are:

[0019] 1. The present invention is provided with a synchronous transmission component in the upper slot. The transmission gear is driven by a No. 1 motor to rotate. The transmission gear drives the transmission rods on both sides to slide in the upper slot. The transmission rods also drive the shift plates on both sides to move toward or in the opposite direction in the upper slot, thereby accelerating the relative displacement speed of the tubular parts at both ends, thereby achieving a faster processing rate.

[0020] 2. The present invention is provided with a rotating clamping structure. After the tubular part is placed at the center position of the rotating disk, the clamping plate can be driven by the driving component arranged in the rotating disk, so that the clamping plate slides in the slide groove, thereby clamping the root of the tubular part. The arrangement of three clamping plates will also enhance the stability of clamping. Since the rotating clamping structure is arranged on the side of the shift plate on both sides, the two sections of the tubular part can be clamped. At the same time, a No. 2 motor is arranged on the side of the rotating clamping structure on one side, and the rotating clamping structure is driven by the No. 2 motor to rotate. When the tubular parts at both ends contact and squeeze each other, the two sections of the tubular parts can be rotated at the same time, which is more convenient for welding processing.

[0021] 3. The present invention sets two limiting support structures on both sides of the welding structure. When the tubular member extends into the internal ring, the driving component arranged in the external ring will drive the internal gear ring to rotate, and then drive the gear shaft to rotate. The rotating gear shaft will drive the limiting slide bar to slide, thereby realizing the limiting clamping of the tubular member. The limiting of the tubular member can prevent the deviation during welding or rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the top view of a rotary welding device for mechanical manufacturing provided by the present invention;

[0023] Figure 2 yes Figure 1 A magnified view of part A;

[0024] Figure 3 It is a schematic diagram of a half-section structure of a base of a rotary welding device for mechanical manufacturing provided by the present invention;

[0025] Figure 4 yes Figure 3 A magnified view of part B;

[0026] Figure 5 It is a schematic diagram of the disassembled structure of a rotary welding device for mechanical manufacturing provided by the present invention;

[0027] Figure 6 yes Figure 5 Enlarged view of part C;

[0028] Figure 7 It is a schematic diagram of a position limiting clamping structure of a rotary welding device for mechanical manufacturing provided by the present invention.

[0029] In the figure, 1 is a base, 2 is an upper groove, 3 is a through groove, 4 is a No. 1 motor, 5 is a transmission gear, 6 is a shift plate, 7 is a rotating disk, 8 is a slide groove, 9 is a clamping plate, 10 is a No. 2 motor, 11 is a transmission rod, 12 is a No. 1 tooth groove, 13 is a side fixing part, 14 is a slide rail, 15 is a return groove, 16 is a No. 3 motor, 17 is a sawtooth, 18 is a rotating gear, 19 is a transmission crawler, 20 is a threaded rod, 21 is a slider, 22 is a fixed seat, 23 is a rotating rod, 24 is a welding gun, 25 is an arc clamping block, 26 is a side block, 27 is a fixed bent rod, 28 is an external collar, 29 is an internal collar, 30 is a connecting plate, 31 is a No. 1 groove, 32 is a No. 2 groove, 33 is a connecting bent rod, 34 is a gear shaft, 35 is a limit slide rod, and 36 is a No. 2 tooth groove. DETAILED DESCRIPTION

[0030] The following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.

[0031] like Figure 1-Figure 7 As shown, a rotary welding device for mechanical manufacturing includes a base 1, an upper groove 2 and a return groove 15 are arranged on the upper surface of the base 1, the upper groove 2 is arranged in the middle of the return groove 15, a synchronous transmission component is arranged in the upper groove 2, and the synchronous transmission component includes a shift plate 6, two shift plates 6 are slidably connected in the upper groove 2, a rotating clamping structure is arranged between the sides of the two shift plates 6 close to each other, a transmission rod 11 is fixedly connected to the side of the shift plate 6, and a plurality of No. 1 tooth grooves 12 are arranged on the side of the transmission rod 11, a No. 1 motor 4 is arranged in the base 1, and the output end 1 of the No. 1 motor 4 is connected to the output end 1 of the No. 1 motor 4. A transmission gear 5 is fixedly connected to the inner bottom surface of the upper groove 2, and the transmission gear 5 is meshed and connected in the No. 1 tooth groove 12. A through groove 3 is arranged on the inner side surface of the upper groove 2, and the through groove 3 is arranged on the side close to the end of the transmission rod 11. A synchronous transmission component is arranged in the upper groove 2, and the No. 1 motor 4 drives the rotation of the transmission gear 5. The transmission gear will drive the transmission rods 11 on both sides to slide in the upper groove 2. The transmission rod 11 will also drive the shift plates 6 on both sides to move toward or in the opposite direction in the upper groove 2, thereby accelerating the relative displacement speed of the tubular parts at both ends, thereby achieving a faster processing rate;

[0032] The upper surface of the base 1 is fixedly connected with a slide rail 14, and two slide rails 14 are arranged on both sides of the upper slot 2. Both sides of the shift plate 6 are fixedly connected with side fixing members 13, and the ends of the side fixing members 13 are slidably connected to the slide rails. The arrangement of the slide rails 14 and the side fixing members 13 plays an auxiliary role, making the shift plate 6 more stable during the movement;

[0033] The rotating clamping structure includes a rotating disk 7, which is rotatably connected to the side of the shift plate 6. The rotating disk 7 is provided with three slide grooves 8 in a circular array on the side away from the shift plate 6. A clamping plate 9 is slidably connected in the slide groove 8. A second motor 10 is fixedly connected to the side of the shift plate 6 away from the rotating disk 7. The output end of the second motor 10 is fixedly connected to the side of the rotating disk 7. After the tubular member is placed at the center position of the rotating disk 7, the clamping plate 9 can be driven by the driving component provided in the rotating disk 7, so that the clamping plate 9 slides in the slide groove 8, thereby clamping the root of the tubular member, and the arrangement of the three clamping plates 9 will also enhance the stability of the clamping, because the sides of the shift plates 6 on both sides are provided with a rotating clamping structure, that is, the two sections of the tubular member can be clamped, and at the same time, a second motor 10 is provided on the side of the rotating clamping structure on one side, and the rotating clamping structure is driven by the second motor 10 to rotate. When the tubular members at both ends contact and squeeze each other, the two sections of the tubular member can be rotated at the same time, which is more convenient for welding processing;

[0034] A rotating assembly is provided in the return groove 15, and the rotating assembly includes a rotating gear 18. Both rotating gears 18 are rotatably connected to the inner side surface of the return groove 15. A transmission track 19 is provided on the outer side of the rotating gear 18. A sawtooth 17 is provided on the inner side of the transmission track 19. The rotating gear 18 is meshed and connected between the sawtooths 17. A threaded rod 20 is fixedly connected to the side surface of the rotating gear 18. The end of the threaded rod 20 is rotatably connected to the inner side surface of the return groove 15 away from the rotating gear 18. A No. 3 motor 16 is fixedly connected to the outer side surface of the base 1. The output end of the No. 3 motor 16 is fixedly connected to the side surface of the rotating gear 18. By providing the rotating assembly in the return groove 15, the No. 3 motor 16 drives the rotating gear 18 to rotate. Under the action of the transmission track 19, the two rotating gears 18 are synchronously rotated, and then the rotating gear 18 drives the threaded rod 20 to rotate in the return groove 15;

[0035] The threaded rod 20 passes through and is threadedly connected with a slider 21, and side blocks 26 are fixedly connected to both sides of the slider 21. The threaded rod 20 passes through and is threadedly connected in the side blocks 26. The lower surface of the slider 21 is slidably connected to the inner bottom surface of the return groove 15. The upper surface of the slider 21 is provided with a welding structure, and the upper surface of the side block 26 is provided with a limited support structure. The rotation of the threaded rod 20 will cause the slider 21 and the side block 26 to move in the return groove 15, so that the welding structure and the limited support structure have more accurate position control for the welding of the tubular member.

[0036] The welding structure includes a fixed seat 22, which is fixedly connected to the upper surface of the slider 21, a rotating rod 23 is rotatably connected in the fixed seat 22, a No. 4 motor is fixedly connected to the outer side of the fixed seat 22, the output end of the No. 4 motor passes through the fixed seat 22 and is fixedly connected to the side of the rotating rod 23, a clamping groove is provided at the end of the rotating rod 23, a welding gun 24 is clamped and connected in the clamping groove, an arc clamping block 25 is rotatably connected to the upper surface of the rotating rod 23 through a rotating shaft, and the arc clamping block 25 is arranged on both sides of the clamping groove. By providing a welding structure, after the slider 21 is shifted to the joint position of the two sections of the tubular parts, the No. 4 motor can drive the rotating rod 23 to rotate in the fixed seat 22, so that the welding gun 24 can weld the tubular parts;

[0037] The position-limiting support structure includes a fixed curved rod 27, and the ends of the two fixed curved rods 27 close to each other are fixedly connected to an external collar 28, and the inner side of the external collar 28 is fixedly connected to an internal collar 29 through a connecting plate 30. The inner side of the external collar 28 is rotatably connected to an inner gear ring, and the side of the external collar 28 is rotatably connected to a gear shaft 34 through a connecting curved rod 33. The gear shaft 34 is meshed and connected to the inner side of the inner gear ring. The side surfaces of the external collar 28 and the internal collar 29 are respectively provided with a first groove 31 and a second groove 32, and the first groove 31 and the second groove 32 slide in the inner side of the external collar 28. A limit slide bar 35 is connected, and a second tooth groove 36 is provided on the side of the limit slide bar 35. The gear shaft 34 is meshed and connected in the second tooth groove 36. By arranging two limit support structures on both sides of the welding structure, when the tubular member extends into the internal ring 29, the driving component provided in the external ring 28 will drive the internal gear ring to rotate, and then drive the gear shaft 34 to rotate. The rotating gear shaft 34 will drive the sliding of the limit slide bar 35, thereby realizing the limit clamping of the tubular member. The limit of the tubular member can prevent the deviation during welding or rotation.

[0038] The working principle of the present invention is as follows:

[0039] By arranging a synchronous transmission assembly in the upper slot 2, the transmission gear 5 is driven to rotate by the No. 1 motor 4, and the transmission gear drives the transmission rods 11 on both sides to slide in the upper slot 2. The transmission rods 11 also drive the shift plates 6 on both sides to move toward or in the opposite direction in the upper slot 2, thereby accelerating the relative displacement speed of the tubular parts at both ends, thereby achieving a faster processing rate. The setting of the slide rail 14 and the side fixing member 13 plays an auxiliary role, making the shift plate 6 more stable during the movement process;

[0040] After the tubular member is placed at the center of the rotating disk 7, the clamping plate 9 can be driven by the driving component arranged in the rotating disk 7, so that the clamping plate 9 slides in the slide groove 8, thereby clamping the root of the tubular member, and the arrangement of the three clamping plates 9 will also enhance the stability of the clamping, because the side surfaces of the shift plates 6 on both sides are provided with a rotating clamping structure, that is, the two sections of the tubular member can be clamped, and at the same time, a second motor 10 is arranged on the side surface of the rotating clamping structure on one side, and the rotating clamping structure is driven by the second motor 10 to rotate, and when the tubular members at both ends contact and squeeze each other, the two sections of the tubular member can be rotated at the same time, which is more convenient for welding processing;

[0041] By arranging a rotating assembly in the return groove 15, the third motor 16 drives the rotating gear 18 to rotate, and under the action of the transmission track 19, the two rotating gears 18 are synchronously rotated, and then the rotating gear 18 drives the threaded rod 20 to rotate in the return groove 15. The rotation of the threaded rod 20 causes the slider 21 and the side block 26 to move in the return groove 15, so that the welding structure and the limit support structure have more accurate position control for the welding of the tubular member;

[0042] By providing a welding structure, after the slider 21 is moved to the joint position of the two sections of the tubular member, the rotating rod 23 can be driven by the fourth motor to rotate in the fixed seat 22, so that the welding gun 24 can weld the tubular member;

[0043] By setting two limiting support structures on both sides of the welding structure, when the tubular member extends into the internal ring 29, the driving component provided in the external ring 28 will drive the internal gear ring to rotate, and then drive the gear shaft 34 to rotate. The rotating gear shaft 34 will drive the limiting slide bar 35 to slide, thereby realizing the limiting clamping of the tubular member. The limiting of the tubular member can prevent the deviation during welding or rotation.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A rotary welding device for mechanical manufacturing, characterized in that: The invention comprises a base (1), wherein the upper surface of the base (1) is provided with an upper groove (2) and a return groove (15), wherein the upper groove (2) is provided in the middle of the return groove (15), wherein a synchronous transmission component is provided in the upper groove (2), wherein the synchronous transmission component comprises a shift plate (6), wherein two shift plates (6) are slidably connected in the upper groove (2), a rotating clamping structure is provided between the sides of the two shift plates (6) close to each other, and the sides of the shift plates (6) are fixedly connected A transmission rod (11) is provided, and a plurality of first tooth grooves (12) are arranged on the side of the transmission rod (11). A first motor (4) is arranged in the base (1), and an output end 1 of the first motor (4) penetrates the inner bottom surface of the upper groove (2) and is fixedly connected to a transmission gear (5), and the transmission gear (5) is meshedly connected in the first tooth groove (12). A through groove (3) is arranged on the inner side surface of the upper groove (2), and the through groove (3) is arranged on the side close to the end of the transmission rod (11).

2. The rotary welding device for mechanical manufacturing according to claim 1, characterized in that: The upper surface of the base (1) is fixedly connected with a slide rail (14), and two of the slide rails (14) are arranged on both sides of the upper groove (2). Both sides of the shift plate (6) are fixedly connected with side fixing members (13), and the ends of the side fixing members (13) are slidably connected in the slide rail.

3. The spin welding device for mechanical manufacturing according to claim 1, characterized in that: The rotary clamping structure comprises a rotating disk (7), the rotating disk (7) is rotatably connected to the side of the shift plate (6), three slide grooves (8) are arranged in a ring array on the side of the rotating disk (7) away from the shift plate (6), a clamping plate (9) is slidably connected in the slide groove (8), a second motor (10) is fixedly connected to the side of the shift plate (6) away from the rotating disk (7), and the output end of the second motor (10) is fixedly connected to the side of the rotating disk (7).

4. The spin welding device for mechanical manufacturing according to claim 1, characterized in that: A rotating assembly is arranged in the return groove (15), and the rotating assembly includes a rotating gear (18). Both of the rotating gears (18) are rotatably connected to the inner side surface of the return groove (15). A transmission track (19) is arranged on the outer side of the rotating gear (18). A sawtooth (17) is arranged on the inner side of the transmission track (19). The rotating gear (18) is meshedly connected between the sawtooths (17). A threaded rod (20) is fixedly connected to the side surface of the rotating gear (18). The end of the threaded rod (20) is rotatably connected to the inner side surface of the return groove (15) away from the rotating gear (18). A third motor (16) is fixedly connected to the outer side surface of the base (1), and the output end of the third motor (16) is fixedly connected to the side surface of the rotating gear (18).

5. The spin welding device for mechanical manufacturing according to claim 4, characterized in that: The threaded rod (20) passes through and is threadedly connected to a slider (21), and side blocks (26) are fixedly connected to both sides of the slider (21). The threaded rod (20) passes through and is threadedly connected to the side blocks (26), and the lower surface of the slider (21) is slidably connected to the inner bottom surface of the return groove (15). The upper surface of the slider (21) is provided with a welding structure, and the upper surface of the side block (26) is provided with a limited support structure.

6. The spin welding device for mechanical manufacturing according to claim 5, characterized in that: The welding structure comprises a fixed seat (22), wherein the fixed seat (22) is fixedly connected to the upper surface of the slider (21), a rotating rod (23) is rotatably connected inside the fixed seat (22), a No. 4 motor is fixedly connected to the outer side surface of the fixed seat (22), an output end of the No. 4 motor passes through the fixed seat (22) and is fixedly connected to the side surface of the rotating rod (23), a clamping groove is arranged at the end of the rotating rod (23), a welding gun (24) is clamped and connected in the clamping groove, and an arc clamping block (25) is rotatably connected to the upper surface of the rotating rod (23) via a rotating shaft, and the arc clamping block (25) is arranged on both sides of the clamping groove.

7. The spin welding device for mechanical manufacturing according to claim 5, characterized in that: The position-limiting support structure comprises a fixed bent rod (27), one end of two fixed bent rods (27) close to each other is fixedly connected to an external collar (28), the inner side surface of the external collar (28) is fixedly connected to an inner collar (29) via a connecting plate (30), the inner side of the external collar (28) is rotatably connected to an inner gear ring, the side surface of the external collar (28) is rotatably connected to a gear shaft (34) via a connecting bent rod (33), and the gear shaft (34) is meshingly connected to the inner side of the inner gear ring.

8. The spin welding device for mechanical manufacturing according to claim 7, characterized in that: The side surfaces of the external collar (28) and the internal collar (29) are respectively provided with a first groove (31) and a second groove (32); a limit slide bar (35) is slidably connected in the first groove (31) and the second groove (32); a second tooth groove (36) is provided on the side surface of the limit slide bar (35); and the gear shaft (34) is meshedly connected in the second tooth groove (36).

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