Sweeper sheet metal part welding tool based on assembly positioning structure

Abstract

The invention relates to the technical field of sheet metal part welding, and discloses a sweeper sheet metal part welding tool based on an assembly positioning structure. The placing part comprises a base, the base is in sliding connection with moving frames through a sliding rail base arranged at the top of the base, the two moving frames are symmetrically distributed left and right along the center of the base, clamping pieces used for limiting sheet metal parts are arranged in the moving frames, the clamping pieces comprise fixed ring seats, the fixed ring seats are fixedly connected to the surfaces of the moving frames, and the fixed ring seats are fixedly connected to the surfaces of the moving frames. The fixed ring seat is rotationally connected with a ring frame through a ring groove formed in the outer surface of the circumference of the fixed ring seat. The sweeper sheet metal part welding tool based on the assembly positioning structure can effectively solve the problems that in the prior art, when a sheet metal part is welded, a weld joint needs to be located at the position beneficial to welding, common workers can turn over the sheet metal part to a proper welding angle manually with the help of simple tools, operation is complex, labor intensity is large, and welding efficiency is high. And the overturning precision is relatively low.

Description

Technical Field

[0001] The present invention relates to the technical field of sheet metal part welding, and particularly relates to a welding tool for a sweeping robot sheet metal part based on an assembly positioning structure. Background Art

[0002] Sheet metal is a comprehensive cold working process for metal thin plates. Usually, the thickness of the metal thin plate is below 6 mm. The sheet metal parts of a sweeping robot refer to the metal thin plate parts processed by sheet metal technology and used on the sweeping robot, which play an important role in the structure and function realization of the sweeping robot. Using sheet metal materials can provide good protection and appearance.

[0003] The welding of the sheet metal parts of a sweeping robot is to connect the sheet metal parts together through a welding process to form a complete structure. It is necessary to use appropriate tooling fixtures to assemble and position the sheet metal parts to control welding deformation and ensure the dimensional accuracy of the weld. When welding the sheet metal parts of a sweeping robot, it is necessary to make the weld in a position conducive to welding. Generally, workers will manually use simple tools to flip it to a suitable welding angle, which is complex in operation, has a large labor intensity, and has relatively low flipping accuracy. Summary of the Invention

[0004] Technical Problems to be Solved In view of the above-mentioned drawbacks of the prior art, the present invention provides a welding tool for a sweeping robot sheet metal part based on an assembly positioning structure, which can effectively solve the problems in the prior art that when welding sheet metal parts, it is necessary to make the weld in a position conducive to welding. Generally, workers will manually use simple tools to flip it to a suitable welding angle, which is complex in operation, has a large labor intensity, and has relatively low flipping accuracy.

[0005] To achieve the above object, the present invention is realized through the following technical solutions: The present invention provides a welding tool for a sweeping robot sheet metal part based on an assembly positioning structure, including: A welding part; A placement part, the placement part includes a base, the base is slidably connected with a moving frame through a slide rail base arranged on its top, and two such moving frames are provided and symmetrically distributed left and right along the center of the base. A clamping part for limiting the sheet metal part is arranged in the moving frame; Among them, the clamping part includes a fixed ring seat, the fixed ring seat is fixedly connected to the surface of the moving frame, the fixed ring seat is rotatably connected with a ring frame through a ring groove arranged on its circumferential outer surface, the ring frame is slidably connected with a moving block through a guide groove arranged on its surface, and a plurality of such moving blocks are provided and are circumferentially arranged along the ring frame. A limiting rod is fixedly connected to the outside of the moving block, and a purging part is arranged at the bottom of the moving frame; Among them, a driving part for adjusting the position of the moving block is arranged in the ring frame.

[0006] Further, the driving member includes a rotating plate, which is rotatably connected to the inner side of the ring frame through an annular groove provided on its surface. A connecting rod rotatably connected to the surface of the moving block is rotatably connected to the surface of the rotating plate. The ring frame is fixedly connected with a driving motor I connected to the rotating plate through a mounting frame provided on its inner side.

[0007] Further, a gear ring is fixedly connected to the outer circumferential surface of the ring frame. The moving frame is fixedly connected with a gear meshing with the gear ring through a driving motor II provided inside it.

[0008] Further, an air flow channel is opened inside the limiting rod. Air outlet holes communicating with the air flow channel are opened on the outer circumferential surface of the limiting rod. A plurality of such air outlet holes are provided and are arranged in a circumferential array along the center of the limiting rod. The air outlet holes are designed in a conical shape. An air bag is fixedly connected to the outer circumferential surface of the limiting rod.

[0009] Further, a bracket is fixedly connected to the side of the moving block away from the limiting rod. A guide pipe communicating with the air flow channel is fixedly connected inside the bracket. A heating pipe is fixedly connected inside the bracket. The side of the heating pipe close to the limiting rod is communicated with the guide pipe. An activity plate is slidably connected to the inner wall of the heating pipe. The activity plate is connected to the inner wall of the heating pipe through a return spring provided on its surface. A heating coil capable of heating air is fixedly connected to the inner wall of the heating pipe.

[0010] Further, the purging member includes a fixing plate fixedly connected to the bottom of the moving frame. A piston pipe is fixedly connected to the top of the fixing plate. A piston block is slidably connected inside the piston pipe. The piston block is connected to the inner wall of the piston pipe through a compression spring provided on its bottom. An air outlet pipe communicating with the piston pipe is fixedly connected inside the fixing plate. The air outlet pipe is designed in an inclined shape. A push rod is fixedly connected to the top of the piston block. A spherical block is fixedly connected to the end of the push rod.

[0011] Further, a convex block fitting the outer circumferential surface of the spherical block is fixedly connected to the outer circumferential surface of the ring frame. A plurality of such convex blocks are provided and are arranged in a circumferential array along the center of the ring frame.

[0012] The technical solution provided by the present invention has the following beneficial effects compared with the prior art: The present invention is provided with a clamping member, which drives the ring frame to rotate by the meshing transmission of a gear and a toothed ring, and evenly flips the sheet metal part at a constant speed, enabling the weld seam to always be in a suitable welding position, so that the formation of the weld seam is more uniform and beautiful. There is no need for manual labor to manually flip the workpiece, and the degree of automation is relatively high, thereby reducing the labor intensity, improving the working environment. Moreover, the gas in the heating tube enters the airbag through the air duct, which can cause the airbag to expand, and can adaptively deform according to the surface shape of the sheet metal part, and can fill the tiny gap between the limiting rod and the sheet metal part, thereby providing more comprehensive and tighter limiting, effectively preventing the sheet metal part from having a tiny displacement during the welding process, further improving the accuracy and stability of the limiting. And because the airbag has a certain elasticity, it can evenly disperse the pressure exerted by the limiting rod on the sheet metal part, avoiding damage to the sheet metal part caused by excessive local pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0014] Figure 1 Schematic three-dimensional structure diagram of an embodiment of the present invention; Figure 2 Schematic three-dimensional separated structure diagram of the placement part of an embodiment of the present invention; Figure 3 Schematic three-dimensional separated structure diagram of the clamping member of an embodiment of the present invention; Figure 4 Schematic three-dimensional structure diagram of the driving member of an embodiment of the present invention; Figure 5 Schematic cross-sectional structure diagram of the ring frame of an embodiment of the present invention; Figure 6 For an embodiment of the present invention Figure 5 Enlarged view of the structure at A in Figure 7 For an embodiment of the present invention Figure 5 Enlarged view of the structure at B in Figure 8 Schematic cross-sectional structure diagram of the piston tube of an embodiment of the present invention; Figure 9 For an embodiment of the present invention Figure 8 Enlarged view of the structure at C in

[0015] The reference numerals in the figure respectively represent: 1, welding part; 2, placement part; 21, base; 22, slide rail base; 23, moving frame; 231, second driving motor; 24, clamping part; 241, fixed ring seat; 242, ring frame; 2421, gear ring; 2422, gear; 243, guide groove; 244, moving block; 2441, bracket; 2442, air duct; 2443, heating pipe; 2444, movable plate; 2445, return spring; 2446, heating coil; 245, limiting rod; 2451, air flow channel; 2452, air outlet hole; 2453, air bag; 246, driving part; 2461, rotating plate; 2462, connecting rod; 2463, first driving motor; 25, purging part; 251, fixing plate; 252, piston pipe; 253, piston block; 254, air outlet pipe; 255, push rod; 256, spherical block; 257, convex block. Detailed implementation manners

[0016] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0017] The present invention will be further described below with reference to the embodiments. Embodiment

[0018] Please refer to Figures 1-9 , the present invention provides a technical solution: a welding tool for a sheet metal part of a floor sweeper based on an assembly positioning structure, including: Welding part 1; Placement part 2, the placement part 2 includes a base 21, the base 21 is slidably connected with a moving frame 23 through a slide rail base 22 provided on its top, and two such moving frames 23 are provided and are symmetrically distributed left and right along the center of the base 21, and a clamping part 24 for limiting the sheet metal part is provided in the moving frame 23; Among them, the clamping part 24 includes a fixed ring seat 241, the fixed ring seat 241 is fixedly connected to the surface of the moving frame 23, the fixed ring seat 241 is rotatably connected with a ring frame 242 through a ring groove provided on its circumferential outer surface, the ring frame 242 is slidably connected with a moving block 244 through a guide groove 243 provided on its surface, and a plurality of such moving blocks 244 are provided and are circumferentially arranged along the ring frame 242, a limiting rod 245 is fixedly connected to the outside of the moving block 244, and a purging part 25 is provided at the bottom of the moving frame 23; Among them, a driving part 246 for adjusting the position of the moving block 244 is provided in the ring frame 242.

[0019] The driving member 246 includes a rotating plate 2461. The rotating plate 2461 is rotatably connected to the inner side of the ring frame 242 through a ring groove provided on its surface. A connecting rod 2462 that is rotatably connected to the surface of the moving block 244 is rotatably connected to the surface of the rotating plate 2461. The ring frame 242 is fixedly connected with a first driving motor 2463 connected to the rotating plate 2461 through a mounting frame provided on its inner side.

[0020] A gear ring 2421 is fixedly connected to the outer circumferential surface of the ring frame 242. The moving frame 23 is fixedly connected with a gear 2422 meshing with the gear ring 2421 through a second driving motor 231 provided inside it.

[0021] An air flow channel 2451 is provided inside the limiting rod 245. Air outlet holes 2452 communicating with the air flow channel 2451 are provided on the outer circumferential surface of the limiting rod 245. A plurality of such air outlet holes 2452 are provided and are arranged in a circumferential array along the center of the limiting rod 245. The air outlet holes 2452 are designed in a conical shape, and an air bag 2453 is fixedly connected to the outer circumferential surface of the limiting rod 245.

[0022] A support 2441 is fixedly connected to the side of the moving block 244 away from the limiting rod 245. An air guide pipe 2442 communicating with the air flow channel 2451 is fixedly connected inside the support 2441. A heating pipe 2443 is fixedly connected inside the support 2441, and the heating pipe 2443 is connected to the air guide pipe 2442 on the side close to the limiting rod 245. A movable plate 2444 is slidably connected to the inner wall of the heating pipe 2443. The movable plate 2444 is connected to the inner wall of the heating pipe 2443 through a return spring provided on its surface. A heating coil 2446 for heating air is fixedly connected to the inner wall of the heating pipe 2443.

[0023] The purging member 25 includes a fixing plate 251. The fixing plate 251 is fixedly connected to the bottom of the moving frame 23. A piston tube 252 is fixedly connected to the top of the fixing plate 251. A piston block 253 is slidably connected inside the piston tube 252. The piston block 253 is connected to the inner wall of the piston tube 252 through a compression spring provided at its bottom. An air outlet pipe 254 communicating with the piston tube 252 is fixedly connected inside the fixing plate 251, and the air outlet pipe 254 is designed in an inclined shape. A push rod 255 is fixedly connected to the top of the piston block 253, and a spherical block 256 is fixedly connected to the end of the push rod 255.

[0024] A convex block 257 that fits the outer circumferential surface of the spherical block 256 is fixedly connected to the outer circumferential surface of the ring frame 242. A plurality of such convex blocks 257 are provided and are arranged in a circumferential array along the center of the ring frame 242.

[0025] The clamping process of the sheet metal part: During actual use, the staff places the sheet metal frame and the sheet metal housing of the sweeper in two groups of clamping members 24 respectively. When the sheet metal frame and the sheet metal housing are within the clamping members 24, at this time, by controlling the first driving motor 2463 (the first driving motor 2463 can be selected from a stepping motor, a servo motor, etc., and a stepping motor is preferably used here), the first driving motor 2463 will drive the rotating plate 2461 to rotate uniformly. Since the rotating plate 2461 is connected to the moving block 244 through the connecting rod 2462 on its surface, when the rotating plate 2461 rotates uniformly, the connecting rod 2462 will drive the moving block 244 to move along the guiding groove 243. Multiple moving blocks 244 approach the sheet metal part respectively (preferably four moving blocks 244), until the moving block 244 drives the limiting rod 245 to fit against the surface of the sheet metal part, and the preliminary positioning of the sheet metal part can be realized.

[0026] It should be noted that the four limiting rods 245 move synchronously under the cooperation of the driving member 246, which can ensure that they contact the sheet metal part at the same time, avoid position deviation caused by sequential contact, and the four limiting rods 245 are evenly distributed around the sheet metal part. When approaching synchronously, they can provide uniform supporting forces at different positions of the sheet metal part, so that the sheet metal part is evenly stressed during the limiting process and will not deform or shift due to excessive or insufficient local stress, effectively maintaining the stable state of the sheet metal part. By adjusting the initial position and moving distance of the limiting rod 245, the four synchronously moving limiting rods 245 can adapt to sheet metal parts of various shapes and sizes. Whether it is a square, circular or other irregularly shaped sheet metal part, reliable limiting can be achieved through this synchronous limiting method.

[0027] After the preliminary positioning of the sheet metal part is completed, at this time, the heating coil 2446 in the heating pipe 2443 is started, and the internal air of the heating pipe 2443 (the heating pipe 2443 is made of high-temperature resistant material to prevent the heating coil 2446 from having too high a temperature, resulting in damage to the heating pipe 2443 and affecting its normal use) is heated, so that the gas expands, and by pushing the movable plate 2444 to move, the air in the heating pipe 2443 can enter the air flow channel 2451 in the limiting rod 245 along the air guide pipe 2442. Since a plurality of uniformly distributed air outlet holes 2452 are provided on the circumferential outer surface of the limiting rod 245, the air in the air flow channel 2451 will enter the airbag 2453 along the air outlet holes 2452, and then the airbag 2453 will expand, and the airbag 2453 can fit against the surface of the sheet metal part, thus completing the limiting of the sheet metal part.

[0028] It should be noted that the solenoid valve tube installed at the top of the circumferential outer surface of the heating tube 2443 can perform air exchange according to the usage requirements, thereby changing the gas pressure inside the heating tube 2443, which is beneficial for the movable plate 2444 to compress the gas inside the heating tube 2443 and enter the air guide tube 2442. At the same time, the airbag 2453 can adaptively deform according to the surface shape of the sheet metal part and closely adhere to the surface of the sheet metal part. Compared with the rigid limiting rod 245, the airbag 2453 can fill the tiny gap between the limiting rod 245 and the sheet metal part, thereby providing more comprehensive and tighter limiting, effectively preventing the sheet metal part from having tiny displacement during the welding process, further improving the accuracy and stability of the limiting, and because the airbag 2453 has a certain elasticity, it can evenly disperse the pressure exerted by the limiting rod 245 on the sheet metal part, avoiding damage to the sheet metal part caused by excessive local pressure, especially for some sheet metal parts with relatively sensitive surfaces or prone to deformation.

[0029] After the limiting of the sheet metal frame and the sheet metal shell of the floor sweeper is completed, at this time, the external driving mechanism (the external driving mechanism is preferably driven by a double-headed screw, which can realize the synchronous opposite movement of the two moving frames 23, and the moving distances are the same) will drive the moving frames 23 to move towards each other along the slide rail base 22 on the surface of the base 21, so that the positions to be welded of the sheet metal frame and the sheet metal shell of the floor sweeper can be accurately docked.

[0030] Welding process of the sheet metal part: After the docking of the sheet metal frame and the sheet metal shell of the floor sweeper is completed, at this time, the welding part 1 will move the welding head inside it close to the positions to be welded of the sheet metal frame and the sheet metal shell and weld them.

[0031] By controlling the driving motor two 231, the gear 2422 can be driven to rotate. Since the gear 2422 meshes with the gear ring 2421, the ring frame 242 and the sheet metal part fixed by limiting can be made to rotate uniformly along the central axis of the moving frame 23. Cooperating with the welding part 1, the sheet metal frame and the sheet metal shell of the floor sweeper can be welded.

[0032] Using the meshing transmission of the gear 2422 and the gear ring 2421 to drive the rotation of the ring frame 242 can ensure the position accuracy of the sheet metal part during the rotation process, thereby ensuring the accuracy of the welding position. And the clamping part 24 can accurately position the sheet metal frame and the sheet metal shell in the appropriate position. Cooperating with the rotation of the ring frame 242, the welding head can accurately align with the part to be welded, realizing high-precision welding, which helps to reduce welding deviation, improve welding quality, ensure the welding strength and sealing performance between the sheet metal frame and the sheet metal shell of the floor sweeper, and meet the structural requirements and usage performance of the floor sweeper.

[0033] During welding, the protrusion 257 on the outer surface of the ring frame 242 will intermittently squeeze the spherical block 256 at the end of the push rod 255. When the protrusion 257 just contacts the spherical block 256, the spherical block 256 is not squeezed by the protrusion 257. As the ring frame 242 drives the protrusion 257 to rotate, the protrusion 257 begins to gradually squeeze the spherical block 256, so that the push rod 255 drives the piston block 253 to move into the piston tube 252. At this time, the cavity in the piston tube 252 will be compressed and discharged along the outlet pipe 254. Since the outlet pipe 254 is designed to be inclined, the outlet port of the outlet pipe 254 can be aligned with the welding position of the sheet metal frame and the sheet metal shell to exhaust, which can not only clean the weld position, but also accelerate the cooling of the welding position.

[0034] It is worth mentioning that during the welding process, the exhaust gas can be used to purge the welding area. On the one hand, it can blow away the spatter and smoke generated during the welding process to prevent them from adhering to the weld surface and affecting the appearance quality of the weld and subsequent anti-corrosion treatment. On the other hand, the air blowing can also cool the welding area, accelerate the solidification speed of the weld, refine the grain structure, and improve the mechanical properties of the weld. In addition, the air blowing can also prevent the oxygen in the air from contacting the high-temperature weld metal to a certain extent, reduce the oxidation reaction, and improve the corrosion resistance of the weld.

[0035] The present invention uses the clamping member 24 and the purge member 25 to have the following advantages: Advantage 1: The meshing transmission of the gear 2422 and the gear ring 2421 is used to drive the ring frame 242 to rotate, and the sheet metal is flipped at a constant speed, so that the weld is always in a suitable welding position, so that the weld is formed more evenly and beautifully, and there is no need for manual flipping of the workpiece, which has a high degree of automation, thereby reducing labor intensity and improving the working environment.

[0036] Advantage two: the four limit rods 245 move synchronously with the cooperation of the driving member 246, which can ensure that they are in contact with the sheet metal at the same time, avoiding position deviation caused by successive contacts, and the four limit rods 245 are evenly distributed around the sheet metal. When they approach synchronously, they can provide uniform supporting force at different positions of the sheet metal, so that the sheet metal is evenly stressed during the limiting process, and will not be deformed or shifted due to excessive or insufficient local force, thereby effectively maintaining the stability of the sheet metal.

[0037] Advantage 3: The gas in the heating pipe 2443 enters the airbag 2453 through the air duct 2442, enabling the airbag 2453 to expand. It can adaptively deform according to the surface shape of the sheet metal part, fill the tiny gap between the limiting rod 245 and the sheet metal part, thereby providing more comprehensive and tighter limiting, effectively preventing the sheet metal part from experiencing tiny displacements during the welding process, further improving the accuracy and stability of the limiting. Moreover, since the airbag 2453 has a certain elasticity, it can evenly disperse the pressure exerted by the limiting rod 245 on the sheet metal part, avoiding damage to the sheet metal part caused by excessive local pressure.

[0038] Advantage 4: The airbag 2453 has a certain buffering and shock-absorbing effect. When an external force acts on the sheet metal part, the airbag 2453 can absorb a part of the energy through compression and rebound, reducing the impact of vibration and shock on the sheet metal part, helping to maintain the position accuracy of the sheet metal part, and preventing displacement or coaxiality deviation caused by external interference.

[0039] Advantage 5: During the welding process, the bumps 257 on the outer circumferential surface of the ring frame 242 will intermittently squeeze the spherical block 256 at the end of the push rod 255, enabling the gas to purge the welding area along the air outlet pipe 254. This can not only blow away the spatter and fumes generated during the welding process, preventing them from adhering to the weld surface and affecting the appearance quality of the weld and subsequent anti-corrosion treatment, but also cool the welding area, accelerate the solidification speed of the weld, refine the grain structure, and improve the mechanical properties of the weld.

[0040] Advantage 6: The air outlet hole 2452 is designed in a conical shape, which can play a good guiding role for the air flow, making the air flow more concentrated in one direction. This can ensure that the gas can accurately enter the airbag 2453, avoiding the situation where the air flow is dispersed, resulting in insufficient inflation or uneven inflation of some parts of the airbag 2453, and ensuring that all parts of the airbag 2453 can expand evenly and stably. Moreover, the structural feature of the conical air outlet hole 2452 is that the inlet is large and the outlet is small. When the air in the heating pipe 2443 enters the air flow channel 2451 in the limiting rod 245 through the air duct 2442 and then flows through the conical air outlet hole 2452, due to the gradually decreasing cross-sectional area of the channel, the gas flow rate will increase significantly, thereby shortening the inflation time of the airbag 2453 and improving the efficiency of the entire limiting process.

[0041] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sheet metal welding tool for a sweeping machine based on an assembly positioning structure, characterized in that: include: Welding part (1); A placement portion (2), the placement portion (2) comprising a base (21), the base (21) being slidably connected to a movable frame (23) via a slide rail base (22) arranged on the top thereof, and the movable frame (23) is provided with two movable frames (23) which are symmetrically distributed along the center of the base (21), and a clamping member (24) which can be used to limit the position of the sheet metal part is provided inside the movable frame (23); The clamping member (24) comprises a fixed ring seat (241), the fixed ring seat (241) is fixedly connected to the surface of the moving frame (23), the fixed ring seat (241) is rotatably connected to the ring frame (242) via a ring groove arranged on the outer surface of the circumference thereof, the ring frame (242) is slidably connected to a moving block (244) via a guide groove (243) arranged on the surface thereof, and a plurality of the moving blocks (244) are arranged in an array along the circumference of the ring frame (242), a limiting rod (245) is fixedly connected to the outer side of the moving block (244), and a purge member (25) is provided at the bottom of the moving frame (23); Wherein, a driving member (246) which can be used to adjust the position of the moving block (244) is provided in the ring frame (242).

2. According to claim 1, a sheet metal welding tool for a sweeping machine based on an assembly positioning structure is characterized in that: The driving member (246) comprises a rotating plate (2461), wherein the rotating plate (2461) is rotatably connected to the inner side of the ring frame (242) via a ring groove provided on the surface thereof, the surface of the rotating plate (2461) is rotatably connected to a connecting rod (2462) rotatably connected to the surface of the moving block (244), and the ring frame (242) is fixedly connected to a driving motor 1 (2463) connected to the rotating plate (2461) via a mounting frame provided on the inner side thereof.

3. According to claim 1, a sheet metal welding tool for a sweeping machine based on an assembly positioning structure is characterized in that: The outer circumferential surface of the ring frame (242) is fixedly connected to a gear ring (2421), and the movable frame (23) is fixedly connected to a gear (2422) meshing with the gear ring (2421) via a second drive motor (231) disposed inside the movable frame (23).

4. The sheet metal welding tool for a sweeping machine based on an assembly positioning structure according to claim 1, characterized in that: An air flow channel (2451) is provided inside the limiting rod (245), and an air outlet hole (2452) which is interconnected with the air flow channel (2451) is provided on the circumferential outer surface of the limiting rod (245), and a plurality of the air outlet holes (2452) are arranged and distributed in an array along the central circumference of the limiting rod (245), and the air outlet holes (2452) are designed to be conical, and an air bag (2453) is fixedly connected to the circumferential outer surface of the limiting rod (245).

5. The sheet metal welding tool for a sweeping machine based on an assembly positioning structure according to claim 1, characterized in that: The movable block (244) is fixedly connected to a bracket (2441) on the side away from the limiting rod (245), and an air guide tube (2442) connected to the air flow channel (2451) is fixedly connected inside the bracket (2441); a heating tube (2443) is fixedly connected inside the bracket (2441), and the heating tube (2443) is connected to the air guide tube (2442) on the side close to the limiting rod (245); The inner wall of the heating tube (2443) is slidably connected to a movable plate (2444), and the movable plate (2444) is connected to the inner wall of the heating tube (2443) via a return spring (2445) arranged on the surface. The inner wall of the heating tube (2443) is fixedly connected to a heating coil (2446) that can be used to heat air.

6. The sheet metal welding tool for a sweeping machine based on an assembly positioning structure according to claim 1, characterized in that: The purge member (25) comprises a fixed plate (251), wherein the fixed plate (251) is fixedly connected to the bottom of the movable frame (23), a piston tube (252) is fixedly connected to the top of the fixed plate (251), a piston block (253) is slidably connected inside the piston tube (252), the piston block (253) is connected to the inner wall of the piston tube (252) via a compression spring arranged at the bottom thereof, an air outlet pipe (254) connected to the piston tube (252) is fixedly connected inside the fixed plate (251), and the air outlet pipe (254) is designed to be inclined, a push rod (255) is fixedly connected to the top of the piston block (253), and a spherical block (256) is fixedly connected to the end of the push rod (255).

7. The sheet metal welding tool for a sweeping machine based on an assembly positioning structure according to claim 1, characterized in that: The outer circumferential surface of the ring frame (242) is fixedly connected with a protrusion (257) that fits the outer circumferential surface of the spherical block (256), and a plurality of the protrusions (257) are arranged and distributed in an array along the central circumference of the ring frame (242).

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