Electric tricycle frame welding production process and equipment

Abstract

This invention relates to the field of welding equipment technology, specifically to a welding production process and equipment for an electric tricycle frame. The equipment includes a drive mechanism, an installation mechanism, and a welding mechanism. The drive mechanism includes a base, a movable seat, a column, a sleeve, and a drive unit; the movable seat is slidably connected to the base; the drive unit is located on the base and connected to the movable seat; the column is located on the movable seat; the sleeve is located at the top of the column; the installation mechanism includes pipe a, pipe b, and a positioning unit; pipe a and pipe b are rotatably connected to the sleeve; the positioning unit is located on pipe a and pipe b; the welding mechanism includes a ring frame, a laser welding head, a material box, a mixing box, an isolation cover, a high-pressure gas tank, and a magnetic component; the magnetic component is located inside pipe a; the laser welding head and the material box are located on the ring frame; the bottom end of the material box is connected to the mixing box; the bottom end of the mixing box is connected to the isolation cover via a nozzle; the high-pressure gas tank is located on the ring frame and communicates with the mixing box. This invention significantly improves the tolerance of laser welding to assembly gaps.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, specifically to a welding production process and equipment for electric tricycle frames. Background Technology

[0002] Chinese Patent No. CN118321802B discloses a welding equipment for an electric tricycle frame. The equipment uses a control device to rotate an adjusting rod. Under the pressure of the upper elastic limiting member, the upper threaded sleeve does not rotate. When the adjusting rod rotates, it drives the upper clamping member downwards, causing the upper and lower clamping members to move closer together until the pipe is clamped. After clamping, the upper and lower clamping members can no longer move closer, thus completing the clamping process. After clamping, the adjusting rod can continue to rotate due to the rotation of the upper threaded sleeve. Under the pressure of the lower elastic limiting member... When the lower threaded sleeve does not rotate, the adjusting rod rotates, causing the lifting plate to rise, which in turn moves the two side clamps, bringing them closer together until the pipe is clamped. Once clamped, the two side clamps can no longer move closer, thus completing the clamping of the two side clamps. After clamping, the adjusting rod can continue to rotate by rotating the lower threaded sleeve. This allows for multi-angle clamping of the pipe by simply controlling the rotation of the adjusting rod. Whether using electric or manual control, this reduces costs and is easy to operate, enabling the clamping of welded pipes in one operation.

[0003] However, the existing technology has the following drawbacks: although it can achieve multi-angle reinforcement and butt joint of the tubes, the requirements for the joint at the end are extremely high when the tubes are laser welded. Although the ends of the tubes are ground before welding, the grinding only smooths the surface and does not correct the angle. When the tube ends are aligned, uneven joints are inevitable, resulting in some joints being too large (joint width > 0.2mm). Excessive joints can lead to phenomena such as incomplete welding, which seriously affects the welding quality and reduces the yield rate of frame production. Summary of the Invention

[0004] The purpose of this invention is to address the problems existing in the background art by proposing a welding production process and equipment for electric tricycle frames.

[0005] The technical solution of this invention: A welding production equipment for electric tricycle frames, comprising: The drive mechanism includes a base, a movable seat, a column, a sleeve, and a drive unit; two sets of movable seats are provided and arranged opposite to each other, and the movable seats are slidably connected to the base; the drive unit is located on the base and connected to the movable seats; the column is located on the movable seats; and the sleeve is located at the top of the column. The installation mechanism includes pipe a, pipe b and positioning part; pipe a and pipe b are rotatably connected to sleeves on both sides respectively; the positioning part is provided on pipe a and pipe b for positioning the pipe body to be welded. The welding mechanism includes a motor a, a camera, a ring frame, a laser welding head, a material box, a mixing box, an isolation cover, a high-pressure gas tank, a magnetic component, and a base block. Two sets of motors a are mounted on a column; the two sets of motors a are respectively connected to pipe a and pipe b for transmission. The base block is connected to the outside of pipe a and located at its end, and a positioning line is provided on the base block. The magnetic component is located inside pipe a and at its end. The ring frame is mounted on a base. The laser welding head is mounted on the ring frame. The material box is vertically mounted on the ring frame and contains metal powder. The bottom of the material box is connected to the mixing box. The material box is connected to the mixing box via a connecting pipe, which is equipped with a valve. The bottom of the mixing box is connected to a spray pipe. The isolation cover is connected to the spray pipe. The high-pressure gas tank is mounted on the ring frame and connected to the mixing box via a gas pipe. The camera is connected to the isolation cover.

[0006] Preferably, the drive unit includes a motor b, a bidirectional screw, and a nut block; the nut block has two sets of movable seats respectively connected to both sides, and the internal threads of the two sets of nut blocks have opposite directions; the bidirectional screw is threadedly connected to the nut blocks on both sides; the motor b is mounted on the base and its output end is connected to the bidirectional screw.

[0007] Preferably, both pipe a and pipe b are provided with multiple circumferentially distributed through slots; the positioning part includes a telescopic component, a disc, a transmission rod, and an inner support block; the disc is provided with multiple circumferentially distributed grooves a; one end of the transmission rod is rotatably connected to groove a; the other end of the transmission rod is provided with groove b; the inner support block is rotatably connected to groove b via a rotating shaft; a torsion spring is provided on the rotating shaft; the telescopic component is respectively provided in pipe a and pipe b and is connected to the disc.

[0008] Preferably, the side wall of the transmission rod is provided with a sliding groove; a slider is connected to the inner wall of the groove; the slider is slidably connected to the sliding groove.

[0009] Preferably, the magnetic component includes a mounting block and an electromagnet; the mounting block is connected inside the tube a; multiple sets of electromagnets are provided and distributed circumferentially on the mounting block.

[0010] Preferably, one end of both pipe a and pipe b is provided with a synchronous pulley a; the output end of motor a is connected to a synchronous pulley b; a synchronous toothed belt is connected between synchronous pulley a and synchronous pulley b.

[0011] Preferably, a lid is detachably connected to the top of the hopper; a stirring rod is rotatably connected to the lid; a motor c is provided on the lid; the output end of the motor c is connected to the stirring rod.

[0012] Preferably, the high-pressure gas tank contains rare gas; the gas pipe enters the mixing chamber tangentially.

[0013] This invention also proposes a method for welding the frame of an electric tricycle, using the aforementioned welding equipment, and comprising the following steps: S1. Install pipes: Place the pipes to be welded onto pipes a and b, and adjust the position of the pipes so that the end face of the pipe on pipe a is flush with the positioning line on the bottom liner, and the end face of the pipe on pipe b is flush with the end face of pipe b. Then, use the positioning part to support and position the inner wall of the pipe so that the axis of the pipe coincides with the axis of pipes a and b. Then, use the driving part to make the pipes on both sides move towards each other until the end faces contact each other. S2, Powder Filling: First, open the pressure relief valve on the high-pressure gas tank and the valve on the connecting pipe at the bottom of the material box. The metal powder in the material box will gradually fall into the mixing box. At the same time, the rare gas enters the mixing box tangentially and carries the metal powder in a spiral downward movement toward the nozzle. The metal powder is fully dispersed in the spiral flow and finally sprayed onto the joint through the nozzle. At the same time, the magnetic component is activated. The magnetic component magnetically attracts the metal powder and accelerates the filling of the metal powder into the large joint. At the same time, the motor a synchronously drives the pipe to rotate. S3. Welding operation: Keep the pipe rotating while turning on the laser welding head, and perform laser welding at the joint.

[0014] Compared with the prior art, the above-mentioned technical solution of the present invention has the following beneficial technical effects: By incorporating a welding mechanism, metal powder is mixed with rare gas and sprayed onto the joint. Simultaneously, the magnetic attraction of the magnetic component fills the excessively large joint with the metal powder. When the laser welding head performs laser welding on the joint, the laser energy not only melts the base material but also melts the powder, forming a full molten pool. After solidification, a high-quality weld is formed, significantly improving the tolerance of laser welding to assembly gaps. Even if the joint width reaches 30% of the plate thickness, a well-formed and reliable weld can still be obtained, which is of great significance for electric tricycle frames assembled from tubular materials with large dimensional tolerances. Attached Figure Description

[0015] Figure 1 This is a perspective view of one embodiment of the present invention; Figure 2 This is a perspective view of the pipe cross-section in one embodiment of the present invention; Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle; Figure 4 This is a schematic diagram of the cross-sectional state of pipe a and bottom liner block in one embodiment of the present invention; Figure 5 This is a schematic diagram of the connection structure between the material bin and the mixing box and the high-pressure gas tank in a cross-sectional view according to one embodiment of the present invention. Figure 1 ; Figure 6This is a schematic diagram of the connection structure between the material bin and the mixing box and the high-pressure gas tank in a cross-sectional view according to one embodiment of the present invention. Figure 2 .

[0016] Reference numerals: 1. Base; 2. Movable seat; 3. Column; 4. Sleeve; 5. Motor b; 6. Bidirectional screw; 7. Nut block; 8. Synchronous pulley b; 9. Synchronous toothed belt; 10. Synchronous pulley a; 11. Pipe a; 12. Pipe b; 13. Ring frame; 14. High-pressure gas tank; 15. Material box; 16. Mixing box; 17. Laser welding head; 18. Isolation cover; 19. Transmission rod; 1901. Slide groove; 20. Inner support block; 21. Telescopic component; 22. Disc; 23. Base liner block; 24. Positioning line; 25. Mounting block; 26. Electromagnet; 27. Stirring rod; 28. Motor c; 29. ​​Box cover; 30. Camera; 31. Motor a. Detailed Implementation

[0017] Example 1, as Figures 1-6 As shown, the present invention proposes an electric tricycle frame welding production equipment, which includes a drive mechanism, an installation mechanism and a welding mechanism; The drive mechanism includes a base 1, a movable seat 2, a column 3, a sleeve 4, and a drive unit; the movable seat 2 is provided in two sets and is arranged opposite to each other, and the movable seat 2 is slidably connected to the base 1; the drive unit is provided on the base 1 and connected to the movable seat 2; the column 3 is provided on the movable seat 2; and the sleeve 4 is provided at the top of the column 3. The installation mechanism includes pipe a11, pipe b12 and positioning part; pipe a11 and pipe b12 are rotatably connected to sleeves 4 on both sides (annular grooves are provided on the inner wall of sleeves 4, and annular blocks that are slidably connected to the annular grooves are connected to pipe a11 and pipe b12); the positioning part is provided on pipe a11 and pipe b12 for positioning the pipe body to be welded. The welding mechanism includes a motor a31, a camera 30, a ring frame 13, a laser welding head 17, a material box 15, a mixing box 16, an isolation cover 18, a high-pressure gas tank 14, magnetic components, and a base block 23. Two sets of motors a31 are mounted on a column 3. The two sets of motors a31 are respectively connected to pipes a11 and b12 for transmission. One end of each pipe a11 and pipe b12 is equipped with a synchronous pulley a10. The output end of the motor a31 is connected to a synchronous pulley b8. A synchronous toothed belt 9 connects the synchronous pulleys a10 and b8. The base block 23 is connected to the outside of pipe a11 and located at its end (the base block 23 is ring-shaped to contact the joint between pipes a11 and b12, preventing the filling metal powder from passing through the joint). This leads to material leakage; the base block 23 is made of magnetic copper or other metal materials; the base block 23 is detachably connected to the tube a11, making it easy to replace different models of base blocks 23); the base block 23 is provided with positioning lines 24 (positioning lines 24 are on the same plane as the laser welding head 17, nozzle, magnetic components, and the end face of tube a11); the magnetic components are located inside the tube a11 and at the end, including mounting blocks 25 and electromagnets 26; the mounting blocks 25 are connected inside the tube a11; multiple sets of electromagnets 26 are provided and distributed circumferentially on the mounting blocks 25 (the electromagnets 26 generate magnetic attraction, which can magnetically attract metal powder, helping the metal powder to quickly fill excessively large joints); the ring frame 13 is provided on the base 1; The welding head 17 is mounted on the annular frame 13; the material box 15 is vertically mounted on the annular frame 13, and contains metal powder (the metal powder is iron-based alloy powder). A lid 29 is detachably connected to the top of the material box 15; a stirring rod 27 is rotatably connected to the lid 29; a motor c28 is mounted on the lid 29; the output end of the motor c28 is connected to the stirring rod 27 (the motor c28 drives the stirring rod 27 to rotate and stir the metal powder, ensuring that the metal powder can enter the mixing chamber 16 through the connecting pipe); the bottom of the material box 15 is connected to the mixing chamber 16; the material box 15 is connected to the mixing chamber 16 through a connecting pipe; a valve is mounted on the connecting pipe; a spray pipe is connected to the bottom of the mixing chamber 16 (the spray pipe is detachably connected to the bottom of the mixing chamber 16). The connection method includes, but is not limited to, threaded connection; it facilitates the replacement of nozzles of different lengths to adapt to pipes of different diameters, ensuring that the isolation cover 18 can contact the outer surface of different pipes; the isolation cover 18 is connected to the nozzle (when the pipes at both ends are butted, the isolation cover 18 contacts the outer surface of the pipe to prevent the sprayed powder from spreading, and at the same time can scrape off the powder adsorbed on the outer surface of the pipe to avoid affecting the laser welding operation); the high-pressure gas tank 14 is set on the ring frame 13 and connected to the mixing box 16 through a gas pipe. The high-pressure gas tank 14 contains rare gas (usually argon or nitrogen); the gas pipe enters the mixing box 16 tangentially (ensuring that the gas entering the mixing box 16 can move spirally downwards).Camera 30 is connected to the isolation cover 18. Camera 30 transmits the filling image to the controller, which then determines whether the filling is complete. If the filling is insufficient, the controller rotates the pipe in the opposite direction to the insufficiently filled area until it is fully filled.

[0018] In this embodiment, the pipes to be welded (round pipes in this patent) are respectively fitted onto pipes a11 and b12, with the end face of the pipe on pipe a11 aligned with the positioning line 24, and the end face of the pipe on pipe b12 flush with the end face of pipe b12. The positioning part supports and positions the inner wall of the pipe, so that the central axis of the pipe coincides with the central axis of pipes a11 and b12. Then, the driving part moves the moving seats 2 on both sides toward each other, thereby causing the pipes on both sides to move toward each other until the end faces of the pipes meet. Contact is made; at this point, the seam is directly opposite the laser welding head 17 and the nozzle; the pressure relief valve on the high-pressure gas tank 14 and the valve on the bottom connecting pipe of the material box 15 are opened, and the metal powder in the material box 15 will gradually fall into the mixing box 16. At the same time, the rare gas enters the mixing box 16 tangentially and carries the metal powder in a spiral downward movement toward the nozzle. The metal powder is fully dispersed in the spiral flow, achieving the function of fully mixing the gas and powder. Finally, it is sprayed onto the seam through the nozzle. At the same time, the electromagnet 26 is turned on, using the electromagnet 26 to... The magnetic attraction of the six metal powders, combined with the impact force generated by the airflow, allows the metal powder to quickly fill the excessively large seams (seam width > 0.2mm). Then, the motors a31 on both sides drive the synchronous pulleys b8 to rotate. The synchronous pulleys b8 drive the synchronous pulleys a10 to rotate through the synchronous toothed belt 9. The synchronous pulleys a10 drive the pipes a11 and b12 to rotate synchronously, causing the seams to rotate. This ensures that the metal powder can fill the inner side of the excessively large seams (standard seams may have no or a small amount of powder, as the standard seam width is small, and the powder tends to accumulate at the seam and is not easy to enter the inner side). The bottom liner 23 can block the metal powder inside the seams, preventing the filled metal powder from passing through the seams and causing leakage. During the above process, the camera 30 transmits the filling image to the controller, which judges whether the gaps are fully filled. If there are insufficiently filled areas, the controller controls the motor a31 to drive the pipes a11 and b12 to rotate in the opposite direction, so that the insufficiently filled areas return to the nozzle until they are fully filled.

[0019] After the filling operation is completed, close the valve on the connecting pipe and the pressure relief valve on the high-pressure gas tank 14; keep the pipe rotating, turn on the laser welding head 17, and weld at the joint. The laser energy not only melts the base material, but also melts the powder, forming a full molten pool. After solidification, a high-quality weld is formed, which significantly improves the tolerance of laser welding to assembly gaps. Even if the joint width reaches 30% of the plate thickness (for example, a good connection can be achieved for a gap of 0.25mm), a well-formed and reliable weld can still be obtained, which is of great significance for electric tricycle frames that are assembled and welded from pipes and have large dimensional tolerances.

[0020] It should be noted that filling the inside of larger joints with powder can smooth out the violent fluctuations of the molten pool, making the welding process more stable than when no filling is used. At the same time, it can optimize the microstructure of the weld. For example, adding Ti5Si3 powder to certain materials can suppress the formation of harmful brittle phases.

[0021] Example 2, as Figures 1-2 As shown, the present invention proposes an electric tricycle frame welding production equipment. Compared with Embodiment 1, this embodiment also details the structure of the drive unit. The drive unit includes a motor b5, a bidirectional screw 6, and a nut block 7. The nut block 7 has two sets connected to the movable seats 2 on both sides respectively, and the internal threads of the two sets of nut blocks 7 have opposite directions. The bidirectional screw 6 is threadedly connected to the nut blocks 7 on both sides. The motor b5 is mounted on the base 1 and its output end is connected to the bidirectional screw 6.

[0022] In this embodiment, motor b5 drives the bidirectional screw 6 to rotate, causing the nut blocks 7 on both sides to drive the moving seat 2 to move towards each other. The moving seat 2 drives the sleeve 4 to move, which in turn drives the pipes a11 and b12 on both sides to move towards each other, realizing the function of the pipes on both sides moving towards each other and realizing the function of the pipes on both sides connecting with each other. After welding is completed, the positioning part releases the positioning of the pipes, causing motor b5 to rotate in the opposite direction (relative to the direction of rotation in the above process), thereby causing pipes a11 and b12 to move away from each other.

[0023] Example 3, as Figures 2-4As shown, the present invention proposes an electric tricycle frame welding production equipment. Compared with Embodiment 2, this embodiment further details the structure of the positioning part. Multiple circumferentially distributed through slots are provided on both pipe a11 and pipe b12. The positioning part includes a telescopic component 21, a disc 22, a transmission rod 19, and an inner support block 20. Multiple circumferentially distributed grooves a are provided on the disc 22. One end of the transmission rod 19 is rotatably connected to groove a; the other end of the transmission rod 19 is provided with groove b. The inner support block 20 is rotatably connected to groove b via a rotating shaft (the surface of the inner support block 20 is provided with anti-slip texture to increase friction). A torsion spring is provided on the rotating shaft. The telescopic component 21 is respectively disposed inside pipe a11 and pipe b12 and connected to the disc 22 (the telescopic component 21 includes, but is not limited to, devices such as cylinders).

[0024] In this embodiment, the telescopic component 21 drives the disc 22 to move, and the disc 22 drives one end of the transmission rod 19 to move away from the telescopic component 21. With the cooperation of the slider and the slide groove 1901, the angle between the transmission rod 19 and the disc 22 increases, thereby driving the inner support block 20 to abut against the inner wall of the pipe and supporting and positioning the pipe. Conversely, the telescopic component 21 drives the disc 22 to move closer to the telescopic component 21, so that the inner support block 20 moves away from the pipe, releasing the support and positioning of the pipe, making it easier to remove the pipe.

[0025] It should be noted that after the welding operation is completed, the telescopic component 21 drives the disc 22 to move back and forth, causing the inner support block 20 to repeatedly hit the inner wall of the pipe, making it vibrate, which facilitates the separation of the bottom liner block 23 from the pipe (during welding, the bottom liner block 23 is easy to come into contact with the material in the molten pool, causing the bottom liner block 23 to stick to the weld).

[0026] Example 4, please refer to Figures 1-6 The present invention also proposes a method for welding the frame of an electric tricycle, using the welding production equipment described in any one of Embodiments 1 to 3 above, comprising the following steps: S1. Install the pipes: Place the pipes to be welded onto pipes a11 and b12, and adjust the position of the pipes so that the end face of the pipe on pipe a11 is flush with the positioning line 24 on the bottom liner 23, and the end face of the pipe on pipe b12 is flush with the end face of pipe b12. Then, use the positioning part to support and position the inner wall of the pipe so that the axis of the pipe coincides with the axis of pipe a11 and pipe b12. Then, use the driving part to make the pipes on both sides move towards each other until the end faces contact each other. S2, Powder Filling: First, open the pressure relief valve on the high-pressure gas tank 14 and the valve on the bottom connecting pipe of the material box 15. The metal powder in the material box 15 will gradually fall into the mixing box 16. At the same time, the rare gas enters the mixing box 16 tangentially and carries the metal powder in a spiral downward movement toward the nozzle. The metal powder is fully dispersed in the spiral flow and finally sprayed onto the joint through the nozzle. At the same time, the magnetic component is activated. The magnetic component magnetically attracts the metal powder and accelerates the filling of the metal powder into the large joint. At the same time, the motor a31 synchronously drives the pipe to rotate. S3. Welding operation: Keep the pipe rotating while turning on the laser welding head 17. The laser welding head 17 performs laser welding at the joint.

[0027] It should be noted that all electrical equipment in this patent is controlled by a controller (not shown in the figure, including but not limited to a PLC controller) to operate in an orderly manner.

[0028] In summary, the pipes to be welded are fitted onto pipes a11 and b12 respectively, with the end face of the pipe on pipe a11 aligned with the positioning line 24, and the end face of the pipe on pipe b12 flush with the end face of pipe b12. The telescopic component 21 drives the disc 22 to move, which in turn moves one end of the transmission rod 19 away from the telescopic component 21. With the cooperation of the slider and the slide groove 1901, the angle between the transmission rod 19 and the disc 22 increases, thereby causing the inner support block 20 to abut against the inner wall of the pipe, supporting and positioning the pipe so that the central axis of the pipe coincides with the central axes of pipes a11 and b12. Motor b5 drives the bidirectional screw 6 to rotate, causing the nut blocks 7 on both sides to move the moving seat 2 towards each other. The moving seat 2 moves the sleeve 4, which in turn moves the pipes a11 and b12 on both sides towards each other, realizing the function of the pipes moving towards each other until the end faces of the pipes contact each other. At this time, the joint is directly opposite the laser welding head 17 and the nozzle. The pressure relief valve on the high-pressure gas tank 14 and the valve on the bottom connecting pipe of the material box 15 are opened. The metal powder in the material box 15 will gradually fall into the mixing box 16. At the same time, the rare gas enters the mixing box 16 tangentially and carries the metal powder in a spiral downward direction. The gas moves towards the nozzle, and the metal powder is fully dispersed in the spiral flow, achieving thorough mixing of gas and powder. Finally, it is sprayed onto the seam through the nozzle. At the same time, the electromagnet 26 is activated. The magnetic attraction of the electromagnet 26 to the metal powder, combined with the impact force generated by the airflow, allows the metal powder to quickly fill the excessively large seam. Then, the motors a31 on both sides drive the synchronous pulley b8 to rotate. The synchronous pulley b8 drives the synchronous pulley a10 to rotate through the synchronous toothed belt 9. The synchronous pulley a10 drives the pipes a11 and b12 to rotate synchronously, causing the seam to rotate and ensuring that the metal powder can be filled to all parts. For excessively large seams (standard seams may have little or no powder, and standard seams are narrower, making it easier for powder to accumulate at the seam and difficult to enter the inside), the base block 23 can act as a barrier to prevent the metal powder inside the seam from passing through the seam and causing leakage. During the above process, the camera 30 will transmit the filling image to the controller, which will determine whether the gap is fully filled. If there are insufficiently filled areas, the controller will control the motor a31 to drive the pipes a11 and b12 to rotate in the opposite direction, so that the insufficiently filled areas return to the nozzle until they are fully filled.

[0029] After the filling operation is completed, close the valve on the connecting pipe and the pressure relief valve on the high-pressure gas tank 14; keep the pipe rotating, turn on the laser welding head 17, and weld at the joint. The laser energy not only melts the base material, but also melts the powder, forming a full molten pool. After solidification, a high-quality weld is formed, which significantly improves the tolerance of laser welding to assembly gaps. Even if the joint width reaches 30% of the plate thickness, a well-formed and reliable weld can still be obtained. This is of great significance for electric tricycle frames that are assembled and welded from pipes and have large dimensional tolerances.

[0030] After the welding operation is completed, the telescopic component 21 drives the disc 22 to move back and forth, causing the inner support block 20 to repeatedly hit the inner wall of the pipe, making it vibrate, which facilitates the separation of the bottom liner block 23 from the pipe. Finally, the telescopic component 21 drives the disc 22 to move closer to the telescopic component 21, causing the inner support block 20 to move away from the pipe and release the support and positioning of the pipe. The motor a31 drives the bidirectional screw 6 to rotate in the opposite direction (relative to the above process), causing the pipe a11 and the pipe b12 to move away from each other, so that the welded pipe can be removed.

[0031] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A welding production equipment for electric tricycle frames, characterized in that, include: The drive mechanism includes a base (1), a movable seat (2), a column (3), a sleeve (4), and a drive unit; the movable seat (2) is provided in two sets and is arranged opposite to each other, and the movable seat (2) is slidably connected to the base (1); the drive unit is provided on the base (1) and connected to the movable seat (2); the column (3) is provided on the movable seat (2); the sleeve (4) is provided at the top of the column (3); The installation mechanism includes pipe a (11), pipe b (12) and positioning part; pipe a (11) and pipe b (12) are rotatably connected to sleeves (4) on both sides respectively; the positioning part is provided on pipe a (11) and pipe b (12) for positioning the pipe body to be welded; The welding mechanism includes a motor a (31), a camera (30), a ring frame (13), a laser welding head (17), a material box (15), a mixing box (16), an isolation cover (18), a high-pressure gas tank (14), a magnetic component, and a base block (23); two sets of motors a (31) are provided and are mounted on a column (3); the two sets of motors a (31) are respectively connected to pipe a (11) and pipe b (12); the base block (23) is connected to the outside of pipe a (11) and located at the end, and a positioning line (24) is provided on the base block (23); the magnetic component is located inside pipe a (11) and at the end; the ring... The frame (13) is mounted on the base (1); the laser welding head (17) is mounted on the ring frame (13); the material box (15) is mounted vertically on the ring frame (13), and the material box (15) contains metal powder; the bottom end of the material box (15) is connected to the mixing box (16); the material box (15) is connected to the mixing box (16) through a connecting pipe; a valve is provided on the connecting pipe; the bottom end of the mixing box (16) is connected to the spray pipe; the isolation cover (18) is connected to the spray pipe; the high-pressure gas tank (14) is mounted on the ring frame (13) and connected to the mixing box (16) through a gas pipe; the camera (30) is connected to the isolation cover (18).

2. The electric tricycle frame welding production equipment according to claim 1, characterized in that, The drive unit includes a motor b (5), a bidirectional screw (6), and a nut block (7); the nut block (7) has two sets of movable seats (2) connected to the two sides respectively, and the internal threads of the two sets of nut blocks (7) are opposite; the bidirectional screw (6) is threadedly connected to the nut blocks (7) on both sides; the motor b (5) is mounted on the base (1) and its output end is connected to the bidirectional screw (6).

3. The electric tricycle frame welding production equipment according to claim 1, characterized in that, Both pipe a (11) and pipe b (12) are provided with multiple circumferentially distributed through slots; the positioning part includes a telescopic component (21), a disc (22), a transmission rod (19) and an inner support block (20); multiple circumferentially distributed grooves a are provided on the disc (22); one end of the transmission rod (19) is rotatably connected to groove a; the other end of the transmission rod (19) is provided with groove b; the inner support block (20) is rotatably connected to groove b through a rotating shaft; a torsion spring is provided on the rotating shaft; the telescopic component (21) is respectively provided in pipe a (11) and pipe b (12) and is connected to the disc (22).

4. The electric tricycle frame welding production equipment according to claim 3, characterized in that, The transmission rod (19) has a sliding groove (1901) on its side wall; a slider is connected to the inner wall of the through groove; the slider is slidably connected to the sliding groove (1901).

5. The electric tricycle frame welding production equipment according to claim 1, characterized in that, The magnetic components include a mounting block (25) and an electromagnet (26); the mounting block (25) is connected inside the tube a (11); the electromagnet (26) is provided in multiple sets and is circumferentially distributed on the mounting block (25).

6. The electric tricycle frame welding production equipment according to claim 1, characterized in that, Both tube a (11) and tube b (12) are provided with a synchronous pulley a (10) at one end; the output end of motor a (31) is connected to a synchronous pulley b (8); a synchronous toothed belt (9) is connected between synchronous pulley a (10) and synchronous pulley b (8).

7. The electric tricycle frame welding production equipment according to claim 1, characterized in that, The top of the material box (15) is detachably connected to a box cover (29); a stirring rod (27) is rotatably connected to the box cover (29); a motor c (28) is provided on the box cover (29); the output end of the motor c (28) is connected to the stirring rod (27).

8. The electric tricycle frame welding production equipment according to claim 1, characterized in that, The high-pressure gas tank (14) contains rare gas; the gas pipe enters the mixing box (16) tangentially.

9. A method for welding the frame of an electric tricycle, using the welding equipment described in any one of claims 2-8, characterized in that, Includes the following steps: S1. Install pipes: Place the pipes to be welded onto pipes a (11) and b (12), and adjust the position of the pipes so that the end face of the pipe on pipe a (11) is flush with the positioning line (24) on the bottom liner (23), and the end face of the pipe on pipe b (12) is flush with the end face of pipe b (12). Then use the positioning part to support and position the inner wall of the pipe so that the axis of the pipe coincides with the axis of pipe a (11) and pipe b (12). Then use the driving part to make the pipes on both sides move towards each other until the end faces contact each other. S2, Filling Powder: First, open the pressure relief valve on the high-pressure gas tank (14) and the valve on the bottom connecting pipe of the material box (15). The metal powder in the material box (15) will gradually fall into the mixing box (16). At the same time, the rare gas enters the mixing box (16) tangentially and carries the metal powder in a spiral downward movement toward the nozzle. The metal powder is fully dispersed in the spiral flow and finally sprayed onto the joint through the nozzle. At the same time, the magnetic component is turned on. The magnetic component magnetically attracts the metal powder and accelerates the filling of the metal powder into the large joint. At the same time, the motor a (31) synchronously drives the pipe to rotate. S3. Welding operation: Keep the pipe rotating and turn on the laser welding head (17) at the same time. The laser welding head (17) performs laser welding at the joint.

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