Novel laser welding device

Abstract

The application discloses a novel laser welding device and belongs to the technical field of welding equipment. The device comprises a mechanical arm and a welding assembly installed at the tail end of the mechanical arm. The welding assembly comprises a laser welding head body. A root rotating disc and an end rotating disc are simultaneously and rotatably installed on the outer side of the laser welding head body. The root rotating disc is rotatably matched with the laser welding head body. The end rotating disc is separately arranged on the outer side of the root rotating disc. The outer side of the laser welding head body is simultaneously provided with rotating driving devices for driving the root rotating disc to rotate. A plurality of telescopic devices are installed between the root rotating disc and the end rotating disc. The telescopic devices are uniformly and interval distributed in the circumferential direction of the root rotating disc. The two ends of the telescopic devices are respectively hinged to the outer edges of the root rotating disc and the end rotating disc. A plurality of polishing assemblies are installed on the disc surface of the side of the end rotating disc away from the root rotating disc. The application can realize the integrated operation of welding and surface treatment, thereby improving the work efficiency and quality.

Description

Technical Field

[0001] This invention belongs to the field of welding equipment technology, and specifically relates to a novel laser welding device. Background Technology

[0002] Existing laser welding equipment generally lacks integration with subsequent surface treatment processes. When welding is performed during grinding operations, or after welding is completed, the workpiece still needs to be transferred to a separately set grinding and polishing station for secondary processing. This physically isolated production layout leads to frequent workpiece clamping and positioning, which not only increases auxiliary operation time but may also affect the final forming accuracy due to repeated positioning errors. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a novel laser welding apparatus that can realize integrated welding and surface treatment operations, thereby improving work efficiency and quality.

[0004] To achieve the above objectives, the present invention provides the following technical solution: The novel laser welding device disclosed in this invention includes a robotic arm and a welding assembly installed at the end of the robotic arm. The welding assembly includes a laser welding head body. A root rotating disk and an end rotating disk are rotatably mounted on the outer side of the laser welding head body. The root rotating disk is rotatably engaged with the laser welding head body. The end rotating disks are spaced apart and located on the outer side of the root rotating disk. A rotation drive device for driving the root rotating disk is also installed on the outer side of the laser welding head body. Multiple telescopic devices are installed between the root rotating disk and the end rotating disk. The telescopic devices are evenly spaced around the circumference of the root rotating disk, and their two ends are hinged to the outer edges of the root rotating disk and the end rotating disk, respectively. Multiple grinding components are installed on the side of the end rotating disk away from the root rotating disk. The grinding components are evenly spaced around the circumference of the end rotating disk.

[0005] Furthermore, the grinding assembly includes a grinding rod, a grinding head, a limiting seat, and an elastic tension spring. Guide holes are evenly spaced along the circumference on the end rotating disk. The grinding rod is slidably installed in the guide holes. The outer end of the grinding rod is connected to the grinding head, and the inner end of the grinding rod is connected to the limiting seat. An elastic tension spring is connected between the limiting seat and the end rotating disk, and the elastic tension spring is sleeved on the outside of the grinding rod.

[0006] Furthermore, an arc-shaped support is fixed to the side of the end rotating disk away from the grinding head by a column. The arc-shaped support is coaxially arranged with the end rotating disk. An arc-shaped groove is formed on the arc-shaped support, and a roller is rolled in the arc-shaped groove. The bottom of the arc-shaped groove has a through hole, and the inner end of the grinding rod extends into the through hole. The inner end of the grinding rod has a ball groove, and a ball is rolled in the ball groove. When the roller rolls along the arc-shaped groove to the position of the grinding assembly, the surface of the roller contacts the ball of the grinding assembly.

[0007] Furthermore, opening slots are provided on the inner and outer side walls of the arc-shaped groove. A first motor is installed inside the roller. The output shaft of the first motor extends from one end of the roller and passes through the outer opening slot of the arc-shaped groove before connecting to the first gear. An arc-shaped rack that cooperates with the first gear is installed on the arc-shaped support. A guide shaft is fixedly connected to the other end of the roller and passes through the outer opening slot of the arc-shaped groove.

[0008] Furthermore, a second gear is coaxially connected to the root rotating disk, the second gear meshes with a third gear, the third gear is connected to the output end of a second motor, and the second motor is fixed to the outside of the laser welding head body.

[0009] Furthermore, the robotic arm includes a base and a first servo motor fixedly mounted on the base. The output end of the first servo motor is connected to one end of the first arm. A second servo motor is fixedly connected to the other end of the first arm. The output end of the second servo motor is connected to one end of the second arm. The other end of the second arm is connected to one end of the third arm via a hydraulic cylinder. A third servo motor is connected to the other end of the third arm. The output end of the third servo motor is connected to a welding assembly.

[0010] Furthermore, the laser welding head body is provided with a protective gas nozzle and a purge nozzle, which are respectively connected to a protective gas pipeline and a purge gas pipeline. A cooling water pipeline is also connected to the laser welding head body.

[0011] Furthermore, a cylindrical brush structure is installed on the outer surface of the end rotating disk. One end of the brush structure is connected to the end rotating disk, and the other end extends radially outward toward the end rotating disk. The brush structure is arranged in a ring on the outer side of the laser welding head body.

[0012] The beneficial effects of this invention are as follows: This invention discloses a novel laser welding apparatus. By mounting the laser welding head body at the end of a robotic arm, which has multiple degrees of freedom, it can adapt to welding at various locations on the surface of the workpiece, making welding more convenient. By installing an end-rotating disk on the outside of the laser welding head body, and mounting multiple grinding components on its surface, these grinding components surround the outside of the welding head. Therefore, the welding position can be pre-ground before welding, enabling integrated welding and surface treatment operations, thereby improving welding efficiency and quality.

[0013] In the device disclosed in this invention, the deflection angle of the end rotating disk can be controlled by a telescopic device, allowing the grinding component at the front end to be closer to the grinding surface, which facilitates the grinding of rusted surfaces. Since the weld bead is positioned higher after welding, the grinding component at the rear end is further away, avoiding direct interference with the weld bead and facilitating subsequent polishing operations. Attached Figure Description

[0014] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the following figures are provided for illustration: Figure 1 This is a schematic diagram of the structure of the device of the present invention; Figure 2 This is a schematic diagram of the welding assembly of the present invention. Figure 1 ; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the welding assembly of the present invention. Figure 2 ; Figure 5 This is a schematic diagram of the grinding component.

[0015] The components in the attached diagram are labeled as follows: 1. Robotic arm; 2. Welding assembly; 3. Laser welding head body; 4. Root rotating disk; 5. End rotating disk; 6. Telescopic device; 7. Grinding assembly; 8. Grinding rod; 9. Grinding head; 10. Limiting seat; 11. Elastic tension spring; 12. Column; 13. Arc-shaped support; 14. Arc-shaped groove; 15. Roller; 16. Through hole; 17. Ball groove; 18. Ball; 19. Opening groove; 20. First gear; 21. Arc-shaped rack; 22. Guide shaft; 23. Second gear; 24. Third gear; 25. Second motor; 26. Base; 27. First servo motor; 28. First arm; 29. ​​Second servo motor; 30. Hydraulic cylinder; 31. Third arm; 32. Third servo motor; 33. Protective gas nozzle; 34. Purge nozzle; 35. Protective gas pipeline; 36. Purge gas pipeline; 37. Brush structure; 38. Detailed Implementation

[0016] like Figures 1-5 As shown, the novel laser welding device disclosed in this invention includes a robotic arm 1 and a welding component 2 installed at the end of the robotic arm 1. The robotic arm 1 can use existing technology to realize the six degrees of freedom of the end welding component 2.

[0017] Unlike existing technologies, the welding assembly 2 of this invention includes a laser welding head body 3. The laser welding head body 3 can employ existing technology, utilizing a high-energy-density laser beam as a heat source to locally heat the material, causing it to melt and form a weld joint. Since the chemical composition of rust is mainly hydrated iron oxide, its presence can disrupt the welding process in multiple ways. To ensure welding quality, the welding area can be ground before welding. Furthermore, because irregular weld beads are formed after welding, the welding area can also be ground and polished after welding to improve the appearance of the workpiece.

[0018] Furthermore, the laser welding head body 3 disclosed in this invention is rotatably mounted on the outer side of a root rotating disk 4 and an end rotating disk 5. Both the root rotating disk 4 and the end rotating disk 5 are disc-shaped structures. The end rotating disk 5 has a central hole in the center to avoid interference with the laser welding head body 3. The root rotating disk 4 rotates in conjunction with the laser welding head body 3, and the root rotating disk 4 itself will not deflect.

[0019] The end rotating disks 5 are spaced apart on the outer side of the root rotating disk 4. A rotation drive device for rotating the root rotating disk 4 is also installed on the outer side of the laser welding head body 3. Three telescopic devices 6 are installed between the root rotating disk 4 and the end rotating disks 5. These telescopic devices 6 are hydraulic cylinders 31, and are evenly distributed around the circumference of the root rotating disk 4. Under the coordinated action of the three telescopic devices 6, the end rotating disks 5 can be deflected. It can be understood that this invention is mainly used to control the end rotating disks 5 to achieve forward and backward deflection, so that the grinding component 7 facing forward is at a lower position, and the grinding component 7 located at the rear is at a higher position. The lower front position facilitates grinding of rusted surfaces. Since the weld bead after welding is at a higher position, the grinding components 7 located at the rear are further apart, avoiding direct interference with the weld bead and facilitating subsequent polishing operations.

[0020] The telescopic device 6 of the present invention has its two ends hinged to the outer edges of the root rotating disk 4 and the end rotating disk 5, respectively. Multiple grinding components 7 are installed on the side of the end rotating disk 5 away from the root rotating disk 4, and the grinding components 7 are evenly spaced along the circumference of the end rotating disk 5. The grinding components 7 can be detachably connected to the end rotating disk 5 for easy and timely replacement.

[0021] In this embodiment, the grinding assembly 7 includes a grinding rod 8, a grinding head 9, a limiting seat 10, and an elastic spring 11. The grinding rod 8 is a straight rod, and guide holes are evenly spaced along the circumference of the end rotating disk 5. The grinding rod 8 is slidably installed in the guide holes. The outer end of the grinding rod 8 is connected to the grinding head 9, and the inner end of the grinding rod 8 is connected to the limiting seat 10. An elastic spring 11 is connected between the limiting seat 10 and the end rotating disk 5, and the elastic spring 11 is sleeved on the outside of the grinding rod 8. Under the action of the elastic spring 11, the grinding rod 8 makes elastic contact between the grinding head 9 and the grinding surface, reducing the possibility of jamming. The limiting seat 10 uses a nut and is threadedly connected to the grinding rod 8, which allows for easy disassembly and adjustment of the elastic pressure of the grinding head 9.

[0022] In this embodiment, an arc-shaped support 13 is fixed to the side of the end rotating disk 5 away from the grinding head 9 by a column 12. The arc-shaped support 13 is coaxially arranged with the end rotating disk 5. An arc-shaped groove 14 is formed on the arc-shaped support 13. The shape and position of the arc-shaped groove 14 are adapted to the arc-shaped support 13. A roller 15 is rolled in the arc-shaped groove 14. The axis of the roller 15 is along the radial direction of the arc-shaped support 13. The roller 15 is rolled in the arc-shaped groove 14. A through hole 16 is opened at the bottom of the arc-shaped groove 14. The inner end of the grinding rod 8 extends into the through hole 16. A ball groove 17 is opened at the inner end of the grinding rod 8. A ball 18 is rolled in the ball groove 17. When the grinding head 9 of one of the grinding components 7 wears out, the roller 15 can be controlled to roll along the arc groove 14 to the position of the grinding component 7. The surface of the roller 15 contacts the ball 18 of the grinding component 7, which can drive the grinding component 7 at that position to press down a certain displacement to compensate for its position.

[0023] In this embodiment, opening slots 19 are provided on the inner and outer side walls of the arc-shaped groove 14. A first motor is installed inside the roller 15. The output shaft of the first motor extends from one end of the roller 15, passes through the outer opening slot 19 of the arc-shaped groove 14, and is connected to the first gear 20. An arc-shaped rack 21 that cooperates with the first gear 20 is installed on the arc-shaped support 13. A guide shaft 22 is fixedly connected to the other end of the roller 15. The guide shaft 22 passes through the outer opening slot 19 of the arc-shaped groove 14, which facilitates automatic control of the position of the roller 15. The first motor of this invention is a motor with a brake, which can improve the stability of the device.

[0024] In this embodiment, the root rotating disk 4 is coaxially connected to the second gear 23, which meshes with the third gear 24. The third gear 24 is connected to the output end of the second motor 25, which is fixed on the outside of the laser welding head body 3.

[0025] In this embodiment, the robotic arm 1 includes a base 26 and a first servo motor 27 fixedly mounted on the base 26. The output end of the first servo motor 27 is connected to one end of the first arm 28. The other end of the first arm 28 is fixedly connected to a second servo motor 29. The output end of the second servo motor 29 is connected to one end of the second arm 30. The other end of the second arm 30 is connected to one end of the third arm 32 through a hydraulic cylinder 31. The other end of the third arm 32 is connected to a third servo motor 33. The output end of the third servo motor 33 is connected to the welding assembly 2.

[0026] In this embodiment, the laser welding head body 3 is provided with a protective gas nozzle 34 and a purge nozzle 35. The protective gas nozzle 34 and the purge nozzle 35 are respectively connected to the protective gas pipeline 36 and the purge gas pipeline 37. By designing the purge nozzle 35, impurities generated during welding can be blown away, reducing interference. The laser welding head body 3 is also connected to a cooling water pipeline, which can cool the laser welding head body 3 and improve the life of the device.

[0027] In this embodiment, a cylindrical brush structure 38 is installed on the outer side of the end rotating disk 5. One end of the brush structure 38 is connected to the end rotating disk 5, and the other end extends radially outward toward the end rotating disk 5. The brush structure 38 is arranged in a ring on the outer side of the laser welding head body 3. By designing the brush structure 38, the interference caused by impurities during grinding to the laser welding head body 3 can be reduced.

Claims

1. A novel laser welding device, characterized in that: The system includes a robotic arm and a welding assembly mounted at the end of the robotic arm. The welding assembly includes a laser welding head body. A root rotating disk and an end rotating disk are rotatably mounted on the outer side of the laser welding head body. The root rotating disk rotates in conjunction with the laser welding head body. The end rotating disks are spaced apart on the outer side of the root rotating disk. A rotation drive device that drives the root rotating disk to rotate is also mounted on the outer side of the laser welding head body. Multiple telescopic devices are installed between the root rotating disk and the end rotating disk. The telescopic devices are evenly spaced around the circumference of the root rotating disk. The two ends of the telescopic devices are hinged to the outer edges of the root rotating disk and the end rotating disk, respectively. Multiple grinding components are mounted on the side of the end rotating disk away from the root rotating disk. The grinding components are evenly spaced around the circumference of the end rotating disk.

2. The novel laser welding apparatus according to claim 1, characterized in that: The grinding assembly includes a grinding rod, a grinding head, a limiting seat, and an elastic tension spring. Guide holes are evenly spaced along the circumference of the end rotating disk. The grinding rod is slidably installed in the guide holes. The outer end of the grinding rod is connected to the grinding head, and the inner end of the grinding rod is connected to the limiting seat. An elastic tension spring is connected between the limiting seat and the end rotating disk, and the elastic tension spring is sleeved on the outside of the grinding rod.

3. The novel laser welding apparatus according to claim 2, characterized in that: An arc-shaped support is fixed to the end rotating disk away from the grinding head via a column. The arc-shaped support is coaxially arranged with the end rotating disk. An arc-shaped groove is formed on the arc-shaped support, and a roller is rolled in the arc-shaped groove. A through hole is opened at the bottom of the arc-shaped groove, and the inner end of the grinding rod extends into the through hole. A ball groove is opened at the inner end of the grinding rod, and a ball is rolled in the ball groove. When the roller rolls along the arc-shaped groove to the position of the grinding assembly, the surface of the roller contacts the ball of the grinding assembly.

4. The novel laser welding apparatus according to claim 3, characterized in that: The inner and outer sides of the arc-shaped groove have openings. A first motor is installed inside the roller. The output shaft of the first motor extends from one end of the roller, passes through the outer opening of the arc-shaped groove, and connects to the first gear. An arc-shaped rack that mates with the first gear is installed on the arc-shaped support. A guide shaft is fixedly connected to the other end of the roller and passes through the outer opening of the arc-shaped groove.

5. The novel laser welding apparatus according to claim 1, characterized in that: The root rotating disk is coaxially connected to a second gear, which meshes with a third gear. The third gear is connected to the output end of a second motor, which is fixed to the outside of the laser welding head body.

6. The novel laser welding apparatus according to claim 5, characterized in that: The robotic arm includes a base and a first servo motor fixedly mounted on the base. The output end of the first servo motor is connected to one end of a first arm. A second servo motor is fixedly connected to the other end of the first arm. The output end of the second servo motor is connected to one end of a second arm. The other end of the second arm is connected to one end of a third arm via a hydraulic cylinder. A third servo motor is connected to the other end of the third arm. The output end of the third servo motor is connected to a welding assembly.

7. The novel laser welding apparatus according to any one of claims 1-6, characterized in that: The laser welding head body is provided with a protective gas nozzle and a purge nozzle, which are respectively connected to the protective gas pipeline and the purge gas pipeline. The laser welding head body is also connected to a cooling water pipeline.

8. The novel laser welding apparatus according to claim 7, characterized in that: A cylindrical brush structure is installed on the outer surface of the end rotating disk. One end of the brush structure is connected to the end rotating disk, and the other end extends radially outward toward the end rotating disk. The brush structure is arranged in a ring on the outer side of the laser welding head body.

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