Galvanized plate laser welding device and method

Abstract

The invention relates to the technical field of laser welding equipment, and discloses a galvanized sheet laser welding device and method.The galvanized sheet laser welding device comprises a workbench and a welding gun, and the welding gun is movably installed on the workbench through a motion control mechanism. During use, the heights, the horizontal positions and the welding angles of the welding gun and the polishing abrasive paper are adjusted, the welding gun and the polishing abrasive paper are driven by the electric sliding rail to move synchronously, the external corner position of a to-be-welded part is polished by the polishing abrasive paper in the moving process, and after welding is finished, the polishing abrasive paper and the cleaning abrasive paper are driven by the turnover mechanism to conduct position exchange. And in the reset process, the welding seam is cleaned, surface impurities are removed, in the lifting process of the rectangular plate, a cleaning roller brush can be driven to rotate through the arrangement of a cleaning mechanism, so that polishing abrasive paper or cleaning abrasive paper attached to the cleaning roller brush is cleaned, surface metal chippings are removed, and the better polishing and cleaning effects are achieved in the subsequent use process.

Description

Technical Field

[0001] The present invention relates to the technical field of laser welding equipment, and more specifically to a galvanized sheet laser welding device and method. Background Art

[0002] Galvanized sheet refers to a steel sheet with a layer of zinc on the surface. It is widely used in many fields such as construction, automobiles, and home appliances. When galvanized sheet is used, components are often connected by laser welding. The principle of laser welding is composed of an optical oscillator and a medium placed between the mirrors at both ends of the oscillator cavity. When the medium is excited to a high energy state, it begins to generate in-phase light waves and reflects back and forth between the mirrors at both ends, forming a photoelectric string effect, amplifying the light waves, and obtaining enough energy to begin emitting lasers.

[0003] When welding two galvanized sheets, the outer corners are usually welded to achieve better welding results and make the welding more stable. In order to reduce the influence of the galvanized layer on the weld, laser welding is often used. However, in actual welding operations, the following problems still exist: 1. Since the surface of the galvanized sheet is covered with a galvanized layer, it is easy to produce welding defects such as spatter and unwelded during welding, which seriously affects the welding quality and stability. Therefore, after the spot welding operation is completed and before the welding operation begins, the welding position needs to be polished to increase the surface roughness and improve the welding effect; 2. After the welding operation is completed, there will be impurities such as slag and spatter at the weld, which need to be cleaned manually by the staff to make the weld surface smooth and improve the aesthetics of the welding. Manual cleaning by the staff is not only dangerous (the temperature of the weld position is high after the welding operation, which can easily cause burns when cleaning by hand), but also because cleaning operations need to be performed in time after each welding to prevent impurities such as slag and spatter from sticking after cooling, which reduces work efficiency and is inconvenient for actual production operations. Summary of the invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a galvanized sheet laser welding device and method to solve the problems existing in the above-mentioned background technology.

[0005] The present invention provides the following technical solutions: a galvanized sheet laser welding device, comprising a workbench and a welding gun, wherein the welding gun is movably mounted on the workbench through a motion control mechanism, wherein the motion control mechanism is used to adjust the position and angle of the welding gun, wherein the motion control mechanism comprises a mounting seat, wherein a circular hole is provided on the side of the mounting seat, wherein the welding gun is fixedly mounted in the circular hole, wherein an optical fiber is connected to the end of the welding gun, wherein a flipping mechanism is arranged on the side of the mounting seat, wherein the flipping mechanism comprises two U-shaped blocks, wherein the two U-shaped blocks are fixedly mounted on the side of the mounting seat, wherein a circular plate is slidably mounted in the two U-shaped blocks, wherein the relative sides of the two circular plates are jointly provided with a pre-grinding mechanism and a post-weld cleaning mechanism, and wherein the relative sides of the two circular plates are jointly rotated and mounted A connecting plate is provided, and the pre-grinding mechanism and the post-weld cleaning mechanism are symmetrically arranged on both sides of the connecting plate. The pre-grinding mechanism and the post-weld cleaning mechanism each include two grinding plates, and each of the two matching grinding plates are rotatably connected, and the four grinding plates are connected by an angle adjustment component. A cleaning mechanism is provided on the side of the mounting seat, and the cleaning mechanism includes a rectangular plate and a cleaning roller brush. The two sides of the rectangular plate are respectively fixedly connected to the opposite sides of the two circular plates, and a cleaning hole is opened on the side of the rectangular plate. The cleaning roller brush is movably arranged in the cleaning hole. A self-rotation component is provided on the cleaning roller brush, and the self-rotation component is used to drive the cleaning roller brush to rotate when the circular plate moves up and down, and the cleaning roller brush fits with two of the grinding plates.

[0006] Furthermore, the motion control mechanism also includes a slide plate and an adjusting seat. The top of the workbench is provided with an electric slide rail, the slide plate is movably arranged on the electric slide rail, the top of the slide plate is provided with a column, the top of the column is fixedly installed with a top plate, the slide plate and the relative inner wall of the top plate are jointly rotatably installed with a lifting screw, the top of the top plate is fixedly installed with a first lifting motor, the output shaft of the first lifting motor is connected to the top of the lifting screw, a lifting block is threadedly installed on the lifting screw, an adjusting groove is opened on the side of the adjusting seat, an adjusting screw is jointly rotatably installed on the relative inner walls of the adjusting groove, a position adjusting motor is fixedly installed on the side of the adjusting seat, the output shaft of the position adjusting motor is connected to the end of the adjusting screw, the lifting block is threadedly installed on the adjusting screw, a motor groove is opened on the side of the adjusting seat, an angle adjustment motor is fixedly installed in the motor groove, and the output shaft of the angle adjustment motor is fixedly connected to the side of the mounting seat.

[0007] Furthermore, the flipping mechanism also includes four rectangular sliders, the relative inner walls of the two U-shaped blocks are provided with lifting grooves, the four rectangular sliders are respectively slidably installed in the four lifting grooves, a transmission cavity is provided in the mounting seat, the side inner walls of the transmission cavity are connected with the four lifting grooves through rotating holes, lifting screw rods are rotatably installed in the four rotating holes, the four rectangular sliders are respectively threadedly installed on the four lifting screw rods, the peripheral outer walls of the four lifting screw rods are fixedly sleeved with first sprockets, and two first chains are respectively meshed and installed on the four first sprockets, wherein the peripheral outer walls of two of the lifting screw rods are fixedly sleeved with second sprockets, and the two second sprockets are commonly meshed and installed with second chains, and the other side of the mounting seat is fixedly installed with a second lifting motor, and the output shaft of the second lifting motor is connected to the end of one of the lifting screw rods.

[0008] Furthermore, the flip mechanism also includes two U-shaped side plates, and the two U-shaped side plates are respectively fixedly mounted on the side inner walls of the two circular plates, and the sides of the two circular plates close to each other are provided with mounting holes, and mounting shafts are rotatably mounted in the two mounting holes, and one end of the two mounting shafts are respectively rotatably mounted on the side inner walls of the two U-shaped side plates, and the other ends of the two mounting shafts are respectively fixedly connected to the two sides of the connecting plate, and a rotating component is provided on the two mounting shafts, and the rotating component includes a flipping gear and a sliding rack, and the flipping gear is fixedly sleeved on the circumferential outer wall of the mounting shaft, and a circular groove is provided on the inner wall of one side of the circular plate, and an electric telescopic rod is fixedly mounted in the circular groove, and the side of the sliding rack is fixedly connected to the output end of the electric telescopic rod, and the sliding rack is meshed with the flipping gear.

[0009] Furthermore, the angle adjustment assembly includes two movable plates, two rectangular holes are provided on the side of the connecting plate, and the two movable plates are slidably installed in the two rectangular holes through sliding units. The sliding unit includes a bidirectional screw rod, and the inner walls of the sides of the two rectangular holes close to each other are jointly provided with a connecting hole. The two ends of the bidirectional screw rod are respectively rotatably installed on the relative inner walls of the two rectangular holes. The two movable plates are both threadedly installed on the bidirectional screw rod, and the outer wall of the circumferential side of the bidirectional screw rod is fixedly sleeved with a first bevel gear. A driving motor is fixedly installed on the side of the connecting plate, and the output shaft of the driving motor passes through the connecting hole and is fixedly sleeved with a second bevel gear, and the second bevel gear is meshed with the first bevel gear.

[0010] Furthermore, the angle adjustment assembly also includes four arc-shaped plates, and the sides of the two movable plates close to each other are provided with two installation grooves, and the relative inner walls of the four installation grooves are fixedly installed with limiting shafts, and the four arc-shaped plates are respectively slidably installed on the circumferential outer walls of the four limiting shafts, and the sides of the four arc-shaped plates are provided with through holes, and fixed shafts are rotatably installed in the four through holes, and the circumferential outer walls of the four grinding plates are provided with connecting grooves, and the two ends of the four fixed shafts are respectively fixedly installed on the relative inner walls of the four connecting grooves.

[0011] Furthermore, the pre-grinding mechanism and the post-weld cleaning mechanism also include two circular shafts, two fixed plates are fixedly installed on both sides of the connecting plate, the two ends of the two circular shafts are respectively fixedly installed on the opposite sides of the four fixed plates, and the four grinding plates are respectively rotatably sleeved on the two circular shafts, wherein the sides of two of the grinding plates are jointly fixedly installed with grinding sandpaper, and the sides of the other two grinding plates are jointly fixedly installed with cleaning sandpaper.

[0012] Furthermore, the self-rotating assembly includes two square plates, both of which are fixedly mounted on the sides of the rectangular plates, and a cleaning shaft is commonly rotatably mounted on the opposite sides of the two square plates, the cleaning roller brush is fixedly sleeved on the circumferential outer wall of the cleaning shaft, and a rotating gear is fixedly sleeved on the circumferential outer wall of the cleaning shaft, a square hole is opened on the side of the rectangular plate, and a fixed rack is fixedly mounted on the side of the mounting seat, and the other end of the fixed rack extends outside the square hole and meshes with the rotating gear.

[0013] Furthermore, the cleaning mechanism also includes a collection box, both sides of the collection box are fixedly installed with ears, the sides of the two ears are provided with threaded holes, the side of the rectangular plate is provided with two threaded grooves, the two threaded holes and the two threaded grooves are threadedly installed with fixing bolts, the relative inner walls of the collection box are jointly fixedly installed with a self-cleaning rod, the side of the mounting seat is provided with an induction groove, the induction groove is fixedly installed with a sensor, and the sensor is adapted to the collection box.

[0014] A welding method for a galvanized sheet laser welding device comprises the following steps: S1. Place the workpiece to be welded on the workbench, and adjust the height, horizontal position, and welding angle of the welding gun through the motion control mechanism. While adjusting the position of the welding gun, it can drive the two U-shaped blocks and four grinding plates to turn synchronously, so as to adjust their angles synchronously; S2. The angle adjustment component is used to drive the two movable plates to move toward or away from each other synchronously, and the angle between the two grinding plates is adjusted, so that the grinding angle and the cleaning angle are synchronously adjusted according to the positive angle of the welding position; S3. The staff manually presses the workpiece to be welded to fix it, and drives the slide plate to move horizontally through the electric slide rail, thereby driving the welding gun and four grinding plates to move synchronously, so that the sides of the grinding plates and grinding sandpaper are in contact with the positive corner position of the workpiece to be welded, thereby grinding the positive corner position during the movement of the mounting seat to improve its surface roughness; S4. When the welding operation is completed, the grinding sandpaper and the cleaning sandpaper are driven to swap positions through the flipping mechanism, so that during the resetting process of the mounting seat, the weld is cleaned to remove impurities such as surface slag and spatter; S5. During the lifting and lowering process of the rectangular plate, the cleaning mechanism can drive the cleaning roller brush to rotate, thereby cleaning the grinding sandpaper or cleaning sandpaper attached to it and removing metal debris on the surface, so as to achieve better grinding and cleaning effects in subsequent use. When the cleaning roller brush rotates, it can achieve self-cleaning and improve the cleaning effect of the sandpaper.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. Start the driving motor to drive the second bevel gear to mesh with the first bevel gear, so that the bidirectional screw rod rotates, and the two movable plates are driven to move synchronously toward or away from each other through the action of the thread. When the two movable plates move, they can drive the four arc plates to move synchronously to squeeze or stretch the four grinding plates. By sliding the four arc plates on the four limit shafts, the arc plates can automatically adjust their height positions to avoid the grinding plates from getting stuck when rotating, so that the grinding angle and the cleaning angle can be adjusted synchronously according to the positive angle of the welding position.

[0016] 2. The electric slide rail drives the slide plate to move horizontally, thereby driving the welding gun and four grinding plates to move synchronously. When the sides of two of the grinding plates are in contact with the positive corners of the parts to be welded, the grinding sandpaper is driven to fit with the positive corners of the parts to be welded. During the movement of the mounting seat, the positive corners are polished by the grinding sandpaper to improve the surface roughness. After the positive corners are polished, the welding gun reaches the welding position to perform laser welding. After the welding operation is completed, the grinding sandpaper and the cleaning sandpaper are driven to swap positions by the flipping mechanism. During the resetting process of the mounting seat, the weld is cleaned by the cleaning sandpaper to remove surface impurities such as slag and spatter.

[0017] 3. During the lifting and lowering process of the rectangular plate, the cleaning mechanism can drive the cleaning roller brush to rotate, thereby cleaning the grinding sandpaper or cleaning sandpaper attached to it and removing metal debris on the surface, so as to achieve better grinding and cleaning effects in subsequent use. When the cleaning roller brush rotates, it can achieve self-cleaning and improve the cleaning effect of the sandpaper. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of this embodiment; Figure 2 This is a schematic diagram of the cross-section structure of the adjustment seat in this embodiment; Figure 3 This is a schematic diagram of the partial cross-section structure of the mounting seat and the U-shaped block in this embodiment; Figure 4 for Figure 3 The enlarged structural diagram at A in the middle; Figure 5 This is a schematic diagram of a partial cutaway structure of a U-shaped side panel in this embodiment; Figure 6 for Figure 5 The enlarged structural diagram at B in the middle; Figure 7 This is a schematic diagram of the partial cross-section structure of the connecting plate, the moving plate, and the grinding plate in this embodiment; Figure 8 for Figure 7 The enlarged structural diagram at C in the middle; Fig. 9 for Figure 7 The enlarged structural diagram at D in the middle; Fig.10 This is a schematic diagram of the exploded structure of the grinding plate, the circular shaft, and the grinding sandpaper in this embodiment; Fig.11 This is a schematic diagram of the partial cross-section structure of the rectangular plate, the square plate, and the collecting box in this embodiment; Fig.12 for Fig.11 Enlarged structural diagram at E in the middle.

[0019] The accompanying drawings are marked as follows: 1. workbench; 2. electric slide rail; 3. first lifting motor; 4. lifting screw; 5. slide plate; 6. lifting block; 7. adjusting screw; 8. position adjustment motor; 9. adjusting seat; 10. optical fiber; 11. mounting seat; 12. U-shaped block; 13. welding gun; 14. angle adjustment motor; 15. rectangular slider; 16. circular plate; 17. lifting screw; 18. second lifting motor; 19. first sprocket; 20. first chain; 21. second chain; 22. second sprocket; 24. connecting plate; 25. U-shaped side plate; 26. mounting shaft; 27. flip gear Wheel; 28, sliding rack; 29, electric telescopic rod; 30, moving plate; 31, fixed plate; 32, grinding plate; 33, first bevel gear; 34, second bevel gear; 35, driving motor; 36, bidirectional screw; 37, limit shaft; 38, arc plate; 39, fixed shaft; 40, circular shaft; 41, grinding sandpaper; 42, rectangular plate; 43, fixed rack; 44, square plate; 45, cleaning shaft; 46, rotating gear; 47, self-cleaning rod; 48, cleaning roller brush; 49, collecting box; 50, hanging ear; 51, fixing bolt; 52, cleaning sandpaper; 53, sensor. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with specific embodiments. However, people familiar with the art should understand that the detailed description given here in conjunction with the drawings is for better explanation, and the structure of the present invention necessarily exceeds these limited embodiments. For some equivalent replacement schemes or common means, they are no longer described in detail herein, but still belong to the scope of protection of the present application.

[0021] Figure 1-Figure 12 The best embodiment of the present invention is shown below in conjunction with the attached Figure 1-Figure 12 The present invention is further described.

[0022] A galvanized sheet laser welding device comprises a workbench 1 and a welding gun 13. The welding gun 13 is movably mounted on the workbench 1 through a motion control mechanism. The motion control mechanism is used to adjust the position and angle of the welding gun 13. The motion control mechanism comprises a mounting seat 11. A round hole is opened on the side of the mounting seat 11. The welding gun 13 is fixedly mounted in the round hole. An optical fiber 10 is connected to the end of the welding gun 13. A flip mechanism is arranged on the side of the mounting seat 11. The flip mechanism comprises two U-shaped blocks 12. The two U-shaped blocks 12 are fixedly mounted on the side of the mounting seat 11. A circular plate 16 is slidably mounted in the two U-shaped blocks 12. A pre-grinding mechanism and a post-weld cleaning mechanism are commonly arranged on the opposite sides of the two circular plates 16. A connecting rod 16 is rotatably mounted on the opposite sides of the two circular plates 16. The connecting plate 24, the pre-grinding mechanism and the post-weld cleaning mechanism are symmetrically arranged on both sides of the connecting plate 24, and the pre-grinding mechanism and the post-weld cleaning mechanism each include two grinding plates 32, and each of the two matching grinding plates 32 are rotatably connected, and the four grinding plates 32 are connected through an angle adjustment component. A cleaning mechanism is arranged on the side of the mounting seat 11, and the cleaning mechanism includes a rectangular plate 42 and a cleaning roller brush 48. The two sides of the rectangular plate 42 are respectively fixedly connected to the opposite sides of the two circular plates 16, and a cleaning hole is opened on the side of the rectangular plate 42. The cleaning roller brush 48 is movably arranged in the cleaning hole. A self-rotation component is arranged on the cleaning roller brush 48, and the self-rotation component is used to drive the cleaning roller brush 48 to rotate when the circular plate 16 moves up and down, and the cleaning roller brush 48 fits with two of the grinding plates 32.

[0023] In order to adjust the position and angle of the welding gun 13, the pre-grinding mechanism, and the post-weld cleaning mechanism, the following features are also specifically provided: The motion control mechanism also includes a slide plate 5 and an adjustment seat 9. An electric slide rail 2 is arranged on the top of the workbench 1. The slide plate 5 is movably arranged on the electric slide rail 2. A column is arranged on the top of the slide plate 5. A top plate is fixedly installed on the top of the column. A lifting screw 4 is installed on the slide plate 5 and the relative inner wall of the top plate for rotation. A first lifting motor 3 is fixedly installed on the top of the top plate. The output shaft of the first lifting motor 3 is connected to the top of the lifting screw 4. A lifting block 6 is threadedly installed on the lifting screw 4. An adjusting groove is opened on the side of the adjustment seat 9. An adjusting screw 7 is installed on the relative inner wall of the adjusting groove for rotation. The side of the adjustment seat 9 is fixedly installed A position adjustment motor 8 is installed, the output shaft of the position adjustment motor 8 is connected to the end of the adjustment screw 7, the lifting block 6 is threadedly installed on the adjustment screw 7, a motor slot is opened on the side of the adjustment seat 9, an angle adjustment motor 14 is fixedly installed in the motor slot, and the output shaft of the angle adjustment motor 14 is fixedly connected to the side of the mounting seat 11. Through the cooperation of the first lifting motor 3, the position adjustment motor 8, and the angle adjustment motor 14, the height, horizontal position, and angle of the welding gun 13, the pre-grinding mechanism, and the post-weld cleaning mechanism can be adjusted respectively, so as to adapt to different welding heights and improve the convenience during use.

[0024] In order to prevent the pre-grinding mechanism and the post-weld cleaning mechanism from being stuck to the welded part during flipping, the following features are also set: The flip mechanism also includes four rectangular sliders 15. The relative inner walls of the two U-shaped blocks 12 are provided with lifting grooves. The four rectangular sliders 15 are slidably installed in the four lifting grooves respectively. A transmission cavity is provided in the mounting seat 11. The side inner walls of the transmission cavity are connected to the four lifting grooves through rotating holes. Lifting screw rods 17 are rotatably installed in the four rotating holes. The four rectangular sliders 15 are respectively threadedly installed on the four lifting screw rods 17. The outer walls of the peripheral sides of the four lifting screw rods 17 are fixedly sleeved with first sprockets 19. Two first chains 20 are respectively meshed and installed on the four first sprockets 19. The outer walls of the peripheral sides of the two lifting screw rods 17 are fixedly sleeved with second sprockets 22. The two second A second chain 21 is installed on the sprocket 22 in meshing relationship. A second lifting motor 18 is fixedly installed on the other side of the mounting seat 11. The output shaft of the second lifting motor 18 is connected to the end of one of the lifting screw rods 17. By starting the second lifting motor 18, one of the lifting screw rods 17 is driven to rotate, thereby driving one of the first sprockets 19 and one second sprocket 22 to rotate. Therefore, through the meshing of the four first sprockets 19 and the first chain 20, and the meshing of the two second sprockets 22 and the second chain 21, the remaining three lifting screw rods 17 are driven to rotate synchronously, and through the action of the thread, the four rectangular sliders 15 and the two circular plates 16 are driven to rise and fall synchronously.

[0025] In order to drive the pre-grinding mechanism and the post-weld cleaning mechanism to flip and realize the position reversal function, the following features are also set: The flip mechanism also includes two U-shaped side plates 25, which are fixedly mounted on the inner side walls of the two circular plates 16, and the sides of the two circular plates 16 close to each other are provided with mounting holes. The two mounting holes are rotatably mounted with mounting shafts 26. One end of the two mounting shafts 26 is rotatably mounted on the inner side walls of the two U-shaped side plates 25, and the other ends of the two mounting shafts 26 are fixedly connected to the two sides of the connecting plate 24, respectively. The two mounting shafts 26 are provided with a rotating assembly, and the rotating assembly includes a flip gear 27 and a sliding rack 28. The flip gear 27 is fixedly sleeved on the outer side wall of the mounting shaft 26. A circular groove is provided on the inner wall of one side of the circular plate 16, and an electric telescopic rod 29 is fixedly installed in the circular groove. The side of the sliding rack 28 is fixedly connected to the output end of the electric telescopic rod 29, and the sliding rack 28 is meshed and installed with the flip gear 27. When the two electric telescopic rods 29 drive the two sliding racks 28 to move, the two sliding racks 28 can be meshed with the two flip gears 27, thereby driving the two flip gears 27, the two mounting shafts 26, the connecting plate 24, the pre-grinding mechanism, and the post-weld cleaning mechanism to synchronously flip 180 degrees, so that when the mounting seat 11 reciprocates horizontally, the grinding and cleaning functions are respectively realized.

[0026] In order to adjust the angles of the two grinding plates 32, the following features are also specifically provided: The angle adjustment assembly includes two movable plates 30. Two rectangular holes are provided on the side of the connecting plate 24. The two movable plates 30 are slidably installed in the two rectangular holes through sliding units. The sliding unit includes a bidirectional screw rod 36. The inner walls of the sides of the two rectangular holes close to each other are jointly provided with a connecting hole. The two ends of the bidirectional screw rod 36 are rotatably installed on the relative inner walls of the two rectangular holes. The two movable plates 30 are both threadedly installed on the bidirectional screw rod 36. The outer wall of the circumference of the bidirectional screw rod 36 is fixedly sleeved with a first bevel gear 33. A driving motor 35 is fixedly installed on the side of the connecting plate 24. The output shaft of the driving motor 35 passes through the connecting hole and is fixedly sleeved with a second bevel gear 34. The second bevel gear 34 is meshed and installed with the first bevel gear 33. By starting the driving motor 35, the second bevel gear 34 is driven to rotate, so that it can mesh with the first bevel gear 33, driving the bidirectional screw rod 36 to rotate, so that the two movable plates 30 can achieve synchronous movement toward or away from each other under the action of the thread.

[0027] In order to adjust the angles of the two grinding plates 32, the following features are also specifically provided: The angle adjustment assembly also includes four arc plates 38. Two installation grooves are provided on the sides of the two movable plates 30 that are close to each other. The relative inner walls of the four installation grooves are fixedly installed with limit shafts 37. The four arc plates 38 are respectively slidably installed on the peripheral outer walls of the four limit shafts 37. The sides of the four arc plates 38 are provided with through holes. Fixed shafts 39 are rotatably installed in the four through holes. The peripheral outer walls of the four grinding plates 32 are provided with connecting grooves. The two ends of the four fixed shafts 39 are respectively fixedly installed on the relative inner walls of the four connecting grooves. Through the movement of the two movable plates 30, the four arc plates 38 can be driven to realize the horizontal movement function. During the movement, the four grinding plates 32 can be driven to flip synchronously through the connection with the four grinding plates 32, thereby realizing the angle adjustment function, which is convenient for better adjustment with the positive angle of the welded parts.

[0028] In order to better grind welded parts and clean welds, the following features are also set: The pre-grinding mechanism and the post-weld cleaning mechanism also include two circular shafts 40. Two fixed plates 31 are fixedly installed on both sides of the connecting plate 24. The two ends of the two circular shafts 40 are respectively fixedly installed on the opposite sides of the four fixed plates 31. The four grinding plates 32 are respectively rotatably sleeved on the two circular shafts 40. The sides of two grinding plates 32 are jointly fixedly installed with grinding sandpaper 41, and the sides of the other two grinding plates 32 are jointly fixedly installed with cleaning sandpaper 52. Through the arrangement of the grinding sandpaper 41 and the cleaning sandpaper 52, when the grinding plate 32 moves, the welding parts and welds can be better polished and cleaned.

[0029] In order to clean the grinding sandpaper 41 and the cleaning sandpaper 52 to achieve a better cleaning effect, the following features are specifically provided: The self-rotating assembly includes two square plates 44, and the two square plates 44 are fixedly mounted on the sides of the rectangular plate 42. The cleaning shaft 45 is installed on the opposite sides of the two square plates 44 for rotation together. The cleaning roller brush 48 is fixedly sleeved on the peripheral outer wall of the cleaning shaft 45, and the peripheral outer wall of the cleaning shaft 45 is fixedly sleeved with a rotating gear 46. A square hole is opened on the side of the rectangular plate 42, and a fixed rack 43 is fixedly mounted on the side of the mounting seat 11. The other end of the fixed rack 43 extends out of the square hole and meshes with the rotating gear 46. When the rectangular plate 42 moves, the cleaning shaft 45 and the rotating gear 46 are driven to move synchronously, and the rotating gear 46 can be meshed with the fixed rack 43, thereby driving the rotating gear 46, the cleaning shaft 45, and the cleaning roller brush 48 to rotate synchronously, thereby playing a cleaning function on the grinding sandpaper 41 or the cleaning sandpaper 52 that is in contact with the cleaning roller brush 48.

[0030] In order to improve the continuous cleaning ability of the cleaning roller brush 48, the following features are also specifically provided: The cleaning mechanism also includes a collecting box 49, both sides of which are fixedly installed with hanging ears 50, and the sides of the two hanging ears 50 are provided with threaded holes, and the sides of the rectangular plate 42 are provided with two threaded grooves, and fixing bolts 51 are threadedly installed in the two threaded holes and the two threaded grooves, and the relative inner walls of the collecting box 49 are jointly fixedly installed with a self-cleaning rod 47, and the side of the mounting seat 11 is provided with a sensing groove, and a sensor 53 is fixedly installed in the sensing groove, and the sensor 53 is adapted to the collecting box 49. When the cleaning roller brush 48 rotates, it contacts the self-cleaning rod 47, so that the debris adhered to the cleaning roller brush 48 is cleaned into the collecting box 49 through the self-cleaning rod 47, so as to facilitate subsequent centralized cleaning.

[0031] A welding method for a galvanized sheet laser welding device comprises the following steps: S1. Place the workpiece to be welded on the workbench 1, and adjust the height, horizontal position, and welding angle of the welding gun 13 through the motion control mechanism. While adjusting the position of the welding gun 13, the two U-shaped blocks 12 and the four grinding plates 32 can be driven to turn synchronously, so as to adjust their angles synchronously; S2. The two movable plates 30 are driven to move synchronously toward or away from each other through the angle adjustment component to adjust the angle between the two grinding plates 32, thereby synchronously adjusting the grinding angle and the cleaning angle according to the positive angle of the welding position; S3, the staff manually presses the workpiece to be welded to fix it, and drives the slide plate 5 to move horizontally through the electric slide rail 2, thereby driving the welding gun 13 and the four grinding plates 32 to move synchronously, so that the sides of the grinding plates 32 and the grinding sandpaper 41 are in contact with the positive corner position of the workpiece to be welded, thereby grinding the positive corner position during the movement of the mounting seat 11 to improve its surface roughness; S4. When the welding operation is completed, the grinding sandpaper 41 and the cleaning sandpaper 52 are driven by the flipping mechanism to swap positions, so that during the resetting process of the mounting seat 11, the weld is cleaned to remove impurities such as surface slag and spatter; S5. During the lifting and lowering process of the rectangular plate 42, the cleaning mechanism can drive the cleaning roller brush 48 to rotate, thereby cleaning the sandpaper 41 or the cleaning sandpaper 52 attached thereto and removing metal debris on the surface, thereby achieving better sanding and cleaning effects in subsequent use. When the cleaning roller brush 48 rotates, it can achieve self-cleaning and improve the cleaning effect of the sandpaper.

[0032] The working principle and use process of the present invention are as follows: when in use, the staff places the workpiece to be welded on the workbench 1, sets the sliding distance of the slide plate 5 according to the length of the workpiece, and starts the first lifting motor 3, the position adjustment motor 8, and the angle adjustment motor 14 according to the position to be welded, thereby adjusting the height, horizontal position, and welding angle of the welding gun 13, so that the welding gun 13 is aligned with the position to be welded, which is convenient for subsequent welding operations. When the angle adjustment motor 14 drives the mounting seat 11 and the welding gun 13 to flip over for angle adjustment, it can drive the two U-shaped blocks 12 and the four grinding plates 32 to flip synchronously, thereby adjusting their angles synchronously.

[0033] According to the positive angle of the welding position, the driving motor 35 is started to drive the second bevel gear 34 to mesh with the first bevel gear 33, so that the bidirectional screw rod 36 rotates, and the two movable plates 30 are driven to move synchronously toward or away from each other through the action of the thread. When the two movable plates 30 move, they can drive the four arc plates 38 to move synchronously to squeeze or stretch the four grinding plates 32. By sliding the four arc plates 38 on the four limit shafts 37, the arc plates 38 can automatically adjust the height position to avoid the grinding plates 32 from getting stuck when rotating. With this arrangement, the angle between the two grinding plates 32 can be adjusted, so that the grinding angle and the cleaning angle can be synchronously adjusted according to the positive angle of the welding position.

[0034] The staff manually presses the workpiece to be welded to fix it, and drives the slide plate 5 to move horizontally through the electric slide rail 2, thereby driving the welding gun 13 and the four grinding plates 32 to move synchronously. When the sides of two of the grinding plates 32 are in contact with the positive corner position of the workpiece to be welded, the grinding sandpaper 41 is driven to fit the positive corner position of the workpiece to be welded, so that during the movement of the mounting seat 11, the positive corner position is polished by the grinding sandpaper 41 to improve its surface roughness. After the positive corner position is polished, the welding gun 13 reaches the welding position to perform the laser welding operation.

[0035] When the welding operation is completed, the second lifting motor 18 starts to drive one of the lifting screws 17 to rotate, and through the meshing action of the four first sprockets 19 and the two first chains 20, the two second sprockets 22 and the second chain 21, the four lifting screws 17 are driven to rotate synchronously, thereby driving the four rectangular sliders 15, the two round plates 16, the rectangular plate 42, and the collection box 49 to move downward synchronously through the thread action. When the collection box 49 contacts the sensor 53, the sensor 53 transmits an electrical signal to the second lifting motor 18 and the two electric telescopic rods 29, so that the second lifting motor 18 stops working and the two electric telescopic rods are connected. 29 drives the two sliding racks 28 to slide downward, so that the sliding racks 28 are meshed with the flip gears 27, and the two mounting shafts 26 and the connecting plate 24 are driven to rotate 180 degrees through the two flip gears 27, thereby driving the grinding sandpaper 41 and the cleaning sandpaper 52 to swap positions, and then starting the second lifting motor 18 to drive the four lifting screw rods 17 to rotate in the opposite direction, so that the four rectangular sliders 15 and the two circular plates 16 are reset, thereby driving the cleaning sandpaper 52 to move to a suitable position. When the electric slide rail 2 drives the slide plate 5 to reset, the welding position is cleaned by the cleaning sandpaper 52, effectively removing impurities such as slag and spatter, thereby improving the aesthetics.

[0036] During the lifting and lowering process of the rectangular plate 42, the cleaning shaft 45, the rotating gear 46, and the cleaning roller brush 48 are driven to move synchronously, so that the rotating gear 46 is engaged with the fixed rack 43, so that the cleaning shaft 45 and the cleaning roller brush 48 rotate, and the grinding sandpaper 41 or the cleaning sandpaper 52 in contact with them are cleaned to remove the metal debris on the surface, so as to achieve better grinding and cleaning effects in subsequent use. During the rotation process, the cleaning roller brush 48 can use the self-cleaning rod 47 to clean the metal debris adhered to the cleaning roller brush 48 into the collection box 49, which not only improves the cleaning effect of the cleaning roller brush 48, but also prevents the cleaned debris from splashing to other positions of the workbench 1, which is convenient for subsequent centralized processing.

[0037] The above is only a preferred embodiment of the present invention, and does not limit the present invention in other forms. Any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention still belongs to the protection scope of the technical solution of the present invention.

Claims

1. A galvanized sheet laser welding device, comprising a workbench (1) and a welding gun (13), characterized in that: The welding gun (13) is movably mounted on the workbench (1) via a motion control mechanism, the motion control mechanism being used to adjust the position and angle of the welding gun (13), the motion control mechanism comprising a mounting seat (11), a circular hole being provided on the side of the mounting seat (11), the welding gun (13) being fixedly mounted in the circular hole, an optical fiber (10) being connected to the end of the welding gun (13), a flipping mechanism being provided on the side of the mounting seat (11), the flipping mechanism comprising two U-shaped blocks (12), the two U-shaped blocks (12) being fixedly mounted on the side of the mounting seat (11), a round plate (16) being slidably mounted in the two U-shaped blocks (12), a pre-grinding mechanism and a post-weld cleaning mechanism being provided on the opposite sides of the two round plates (16), a connecting plate (24) being rotatably mounted on the opposite sides of the two round plates (16), the pre-grinding mechanism, the post-weld cleaning mechanism and the post-weld cleaning mechanism being provided ... The post-weld cleaning mechanism is symmetrically arranged on both sides of the connecting plate (24). The pre-grinding mechanism and the post-weld cleaning mechanism both include two grinding plates (32). Each of the two matching grinding plates (32) are rotatably connected to each other. The four grinding plates (32) are connected to each other via an angle adjustment component. A cleaning mechanism is arranged on the side of the mounting seat (11). The cleaning mechanism includes a rectangular plate (42) and a cleaning roller brush (48). The two sides of the rectangular plate (42) are respectively fixedly connected to the opposite sides of the two circular plates (16). A cleaning hole is opened on the side of the rectangular plate (42). The cleaning roller brush (48) is movably arranged in the cleaning hole. A self-rotation component is arranged on the cleaning roller brush (48). The self-rotation component is used to drive the cleaning roller brush (48) to rotate when the circular plate (16) moves up and down. The cleaning roller brush (48) fits two of the grinding plates (32).

2. A galvanized sheet laser welding device according to claim 1, characterized in that: The motion control mechanism further comprises a slide plate (5) and an adjustment seat (9); an electric slide rail (2) is arranged on the top of the workbench (1); the slide plate (5) is movably arranged on the electric slide rail (2); a column is arranged on the top of the slide plate (5); a top plate is fixedly installed on the top of the column; a lifting screw (4) is installed on the slide plate (5) and the inner wall relative to the top plate so as to rotate together; a first lifting motor (3) is fixedly installed on the top of the top plate; an output shaft of the first lifting motor (3) is connected to the top of the lifting screw (4); a lifting screw (4) is threadedly installed on the lifting screw (4). The adjusting seat (9) has an adjusting groove on its side, an adjusting screw (7) is installed on the inner wall of the adjusting groove so as to rotate together, a position adjusting motor (8) is fixedly installed on the side of the adjusting seat (9), an output shaft of the position adjusting motor (8) is connected to the end of the adjusting screw (7), the lifting block (6) is threadedly installed on the adjusting screw (7), a motor groove is opened on the side of the adjusting seat (9), an angle adjusting motor (14) is fixedly installed in the motor groove, and the output shaft of the angle adjusting motor (14) is fixedly connected to the side of the mounting seat (11).

3. A galvanized sheet laser welding device according to claim 1, characterized in that: The flip mechanism further comprises four rectangular sliders (15), the opposite inner walls of the two U-shaped blocks (12) are provided with lifting grooves, the four rectangular sliders (15) are respectively slidably mounted in the four lifting grooves, a transmission cavity is provided in the mounting seat (11), the side inner walls of the transmission cavity are connected to the four lifting grooves through rotating holes, lifting screw rods (17) are rotatably mounted in the four rotating holes, the four rectangular sliders (15) are respectively threadedly mounted on the four lifting screw rods (17), and the four lifting screw rods (17) are respectively threadedly mounted on the four lifting screw rods (17). ) are fixedly sleeved with first sprockets (19) on the circumferential outer walls, and two first chains (20) are respectively meshed and installed on the four first sprockets (19), wherein second sprockets (22) are fixedly sleeved with the circumferential outer walls of two of the lifting screw rods (17), and a second chain (21) is commonly meshed and installed on the two second sprockets (22), and a second lifting motor (18) is fixedly installed on the other side of the mounting seat (11), and the output shaft of the second lifting motor (18) is connected to the end of one of the lifting screw rods (17).

4. A galvanized sheet laser welding device according to claim 1, characterized in that: The flip mechanism further comprises two U-shaped side plates (25), the two U-shaped side plates (25) being fixedly mounted on the side inner walls of the two circular plates (16), the two circular plates (16) having mounting holes on their sides close to each other, mounting shafts (26) being rotatably mounted in the two mounting holes, one end of the two mounting shafts (26) being rotatably mounted on the side inner walls of the two U-shaped side plates (25), and the other ends of the two mounting shafts (26) being fixedly connected to the two sides of the connecting plate (24). The two mounting shafts (26) are each provided with a rotating assembly, the rotating assembly comprising a flipping gear (27) and a sliding rack (28), the flipping gear (27) being fixedly sleeved on the peripheral outer wall of the mounting shaft (26), a circular groove being provided on the inner wall of one side of the circular plate (16), an electric telescopic rod (29) being fixedly installed in the circular groove, a side portion of the sliding rack (28) being fixedly connected to an output end of the electric telescopic rod (29), and the sliding rack (28) being meshedly installed with the flipping gear (27).

5. The galvanized sheet laser welding device according to claim 1, characterized in that: The angle adjustment assembly comprises two movable plates (30), two rectangular holes are provided on the side of the connecting plate (24), the two movable plates (30) are slidably mounted in the two rectangular holes respectively through a sliding unit, the sliding unit comprises a bidirectional screw rod (36), a connecting hole is provided on the inner walls of the sides of the two rectangular holes close to each other, the two ends of the bidirectional screw rod (36) are rotatably mounted on the opposite inner walls of the two rectangular holes respectively, the two movable plates (30) are both threadedly mounted on the bidirectional screw rod (36), a first bevel gear (33) is fixedly sleeved on the outer wall of the circumferential side of the bidirectional screw rod (36), a driving motor (35) is fixedly mounted on the side of the connecting plate (24), an output shaft of the driving motor (35) passes through the connecting hole and is fixedly sleeved with a second bevel gear (34), and the second bevel gear (34) is meshingly mounted with the first bevel gear (33).

6. A galvanized sheet laser welding device according to claim 5, characterized in that: The angle adjustment assembly further comprises four arc-shaped plates (38), two mounting grooves are respectively provided on the mutually adjacent sides of the two movable plates (30), the limiting shafts (37) are respectively fixedly installed on the opposite inner walls of the four mounting grooves, the four arc-shaped plates (38) are respectively slidably installed on the peripheral outer walls of the four limiting shafts (37), the sides of the four arc-shaped plates (38) are respectively provided with through holes, and the four through holes are respectively rotatably installed with fixed shafts (39), the peripheral outer walls of the four grinding plates (32) are respectively provided with connecting grooves, and the two ends of the four fixed shafts (39) are respectively fixedly installed on the opposite inner walls of the four connecting grooves.

7. The galvanized sheet laser welding device according to claim 1, characterized in that: The pre-grinding mechanism and the post-weld cleaning mechanism also include two circular shafts (40), two fixing plates (31) are fixedly mounted on both sides of the connecting plate (24), two ends of the two circular shafts (40) are respectively fixedly mounted on opposite sides of the four fixing plates (31), and the four grinding plates (32) are respectively rotatably sleeved on the two circular shafts (40), wherein the sides of two of the grinding plates (32) are commonly fixedly mounted with grinding sandpaper (41), and the sides of the other two grinding plates (32) are commonly fixedly mounted with cleaning sandpaper (52).

8. The galvanized sheet laser welding device according to claim 1, characterized in that: The self-rotating assembly comprises two square plates (44), the two square plates (44) are fixedly mounted on the side of the rectangular plate (42), the cleaning shaft (45) is rotatably mounted on the opposite side of the two square plates (44), the cleaning roller brush (48) is fixedly sleeved on the peripheral outer wall of the cleaning shaft (45), the peripheral outer wall of the cleaning shaft (45) is fixedly sleeved with a rotating gear (46), the side of the rectangular plate (42) is provided with a square hole, the side of the mounting seat (11) is fixedly mounted with a fixed rack (43), the other end of the fixed rack (43) extends outside the square hole and meshes with the rotating gear (46).

9. The galvanized sheet laser welding device according to claim 1, characterized in that: The cleaning mechanism further comprises a collection box (49), both sides of the collection box (49) are fixedly mounted with hanging ears (50), the sides of the two hanging ears (50) are provided with threaded holes, the side of the rectangular plate (42) is provided with two threaded grooves, the two threaded holes and the two threaded grooves are both threadedly mounted with fixing bolts (51), the opposite inner walls of the collection box (49) are commonly fixedly mounted with a self-cleaning rod (47), the side of the mounting seat (11) is provided with a sensing groove, the sensing groove is fixedly mounted with a sensor (53), and the sensor (53) is adapted to the collection box (49).

10. A welding method applied to the galvanized sheet laser welding device according to any one of claims 1 to 9, characterized in that: The steps include: S1. Placing the workpiece to be welded on the workbench (1), and adjusting the height, horizontal position, and welding angle of the welding gun (13) through a motion control mechanism. While adjusting the position of the welding gun (13), the two U-shaped blocks (12) and the four grinding plates (32) can be driven to turn synchronously, thereby adjusting their angles synchronously; S2, driving the two movable plates (30) to move synchronously toward or away from each other through the angle adjustment component, adjusting the angle between the two grinding plates (32), thereby synchronously adjusting the grinding angle and the cleaning angle according to the positive angle of the position to be welded; S3, the staff manually presses the workpiece to be welded to fix it, and drives the slide plate (5) to move horizontally through the electric slide rail (2), thereby driving the welding gun (13) and the four grinding plates (32) to move synchronously, so that the side of the grinding plate (32) and the grinding sandpaper (41) are in contact with the positive corner position of the workpiece to be welded, thereby grinding the positive corner position during the movement of the mounting seat (11) to improve its surface roughness; S4, when the welding operation is completed, the grinding sandpaper (41) and the cleaning sandpaper (52) are driven by the flipping mechanism to swap positions, so that during the resetting process of the mounting seat (11), the weld is cleaned to remove impurities such as surface slag and spatter; S5. During the lifting and lowering process of the rectangular plate (42), the cleaning mechanism can drive the cleaning roller brush (48) to rotate, thereby cleaning the sandpaper (41) or the cleaning sandpaper (52) attached thereto, removing metal debris on the surface, thereby achieving better sanding and cleaning effects in subsequent use. When the cleaning roller brush (48) rotates, it can achieve self-cleaning, thereby improving the cleaning effect of the sandpaper.

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