A laser processing device for automotive parts

Abstract

The present invention discloses a laser processing device for automobile parts, which relates to the technical field of automobile part processing, and includes a base and a laser welding head; a laser welding mechanism, the laser welding mechanism includes a mounting plate fixedly connected to the upper end of the base, a rotating shaft is rotatably connected to the side wall of the mounting plate, a fixed disk is fixedly connected to the side wall of the rotating shaft, a first sliding groove is opened on the side wall of the fixed disk, two first sliding blocks are symmetrically and slidably connected to the inner wall of the first sliding groove, and arc-shaped fixing plates are fixedly connected to the side walls of the two first sliding blocks. In the present invention, the rotation speed of the pipe during welding can be automatically adjusted according to the wall thickness of the pipe. The thinner the wall of the pipe, the longer the welding residence time during laser welding may cause the pipe to melt through, thereby causing damage to the pipe. Therefore, the thinner the wall of the pipe, the faster the rotation speed of the pipe, which can reduce the residence time of laser welding at the same point, thereby avoiding damage to the pipe.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive component processing, and particularly to a laser processing device for automotive components. Background Art

[0002] Automotive components are important components of automobiles. During the production of automotive components, some need to perform laser welding operations on automotive components to achieve the production of parts.

[0003] Currently, when laser welding pipe components of an automobile, the laser welding head usually rotates around the connection seam of the pipe for one circle for welding. Each time the laser welding head rotates at a constant speed under a set program. For pipes with thinner walls, if the laser welding head stays at the same place for too long during welding, the pipe may be melted through, resulting in damage to the pipe. Therefore, each time laser welding is performed on pipes with different wall thicknesses, an external control program needs to be reset to control the rotation speed of the laser welding head, which is rather troublesome. In addition, after the pipe is welded, there will be welding slag at the welded part, and special grinding equipment needs to be set up later to grind it, increasing production costs and reducing production efficiency.

[0004] Based on this, we propose a laser processing device for automotive components. Summary of the Invention

[0005] The purpose of the present invention is to solve the drawbacks existing in the prior art, and to propose a laser processing device for automotive components.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A laser processing device for automotive components, including a base and a laser welding head;

[0008] Laser welding mechanism, the laser welding mechanism includes a mounting plate fixedly connected to the upper end of the base, a rotating shaft is rotatably connected to the side wall of the mounting plate, a fixed disk is fixedly connected to the side wall of the rotating shaft, a first sliding groove is opened on the side wall of the fixed disk, two first sliders are symmetrically slidably connected to the inner wall of the first sliding groove, arc-shaped fixing plates are fixedly connected to the side walls of the two first sliders, a sliding rod is fixedly connected to the inner wall of the first sliding groove, the side wall of the sliding rod is slidably connected to the two first sliders, a first spring is sleeved on the side wall of the sliding rod, and the two ends of the first spring are respectively fixedly connected to the side walls of the two first sliders. An installation frame is fixedly connected to the upper end of the base, a groove is opened on the side wall of the installation frame, a second slider is slidably connected to the inner wall of the groove, a vertical rod is fixedly connected to the lower end of the second slider, a second spring is sleeved on the side wall of the vertical rod, and the two ends of the second spring are respectively fixedly connected to the lower end of the second slider and the inner bottom of the groove. The lower end of the vertical rod penetrates through the inner top of the installation frame and is fixedly connected to a first arc-shaped plate. A motor is fixedly connected to the side wall of the mounting plate, and the output end of the motor penetrates through the side wall of the mounting plate and is fixedly connected to the rotating shaft.

[0009] Preferably, the laser welding head is fixedly connected to the side wall of the second slider.

[0010] Preferably, the laser welding mechanism further includes a cross plate fixedly connected to the side wall of the first arc-shaped plate, a vertical cylinder is fixedly connected to the lower end of the cross plate, a conductive sliding plate is slidably connected to the inner wall of the vertical cylinder, an insulating rod is fixedly connected to the lower end of the conductive sliding plate, the lower end of the insulating rod penetrates through the lower end of the vertical cylinder and is fixedly connected to a second arc-shaped plate, a third spring is sleeved on the side wall of the insulating rod, and the two ends of the third spring are respectively fixedly connected to the lower end of the conductive sliding plate and the inner bottom of the vertical cylinder. A resistance ring is embedded in the inner wall of the vertical cylinder, and the motor, the conductive sliding plate, the resistance ring and an external power supply are electrically connected through wires.

[0011] Preferably, an insulating sleeve is sleeved on the side wall of the third spring.

[0012] Preferably, a grinding mechanism is installed on the base. The grinding mechanism includes a mounting block fixedly connected to the upper end of the base through a bracket. A second sliding groove is opened on the upper end of the mounting block. A third slider is slidably connected to the inner wall of the second sliding groove. A vertical groove is opened on the upper end of the third slider. An adjusting rod is slidably connected to the inner wall of the vertical groove. A grinding plate is fixedly connected to the upper end of the adjusting rod. A fourth spring is fixedly connected to the inner bottom of the vertical groove, and the upper end of the fourth spring is fixedly connected to the lower end of the adjusting rod.

[0013] Preferably, the grinding mechanism includes a reciprocating lead screw rotatably connected to the inner wall of the second sliding groove. The side wall of the reciprocating lead screw is threadedly connected to the third slider. One end of the reciprocating lead screw close to the mounting plate penetrates through the side wall of the mounting block and is fixedly connected to a gear. A toothed ring is fixedly connected to the side wall of the fixed disk, and the toothed ring is meshed with the gear.

[0014] Preferably, a cooling mechanism is installed on the base. The cooling mechanism includes a sliding cylinder fixedly connected to the upper end of the base. A sliding plug is hermetically and slidably connected to the inner wall of the sliding cylinder. A liquid inlet cavity is formed in the grinding plate. A plurality of liquid outlet holes are formed in the top of the liquid inlet cavity. The sliding cylinder is communicated with the liquid inlet cavity through a one-way liquid supply pipe. A one-way liquid inlet pipe is fixedly connected to the inner wall of the sliding cylinder.

[0015] Preferably, the cooling mechanism further includes a turntable fixedly connected to one end of the reciprocating lead screw. A third sliding groove is formed in the side wall of the turntable. A fourth slider is slidably connected to the inner wall of the third sliding groove. A pin shaft is fixedly connected to the side wall of the fourth slider. A connecting rod is rotatably connected to the side wall of the pin shaft. A push rod is fixedly connected to the upper end of the sliding plug. The upper end of the push rod penetrates through the upper end of the sliding cylinder and is fixedly connected to a connecting shaft. The lower end of the connecting rod is rotatably connected to the connecting shaft.

[0016] Preferably, a cavity is formed in the turntable. A magnetic plate is slidably connected to the inner wall of the cavity. A fixed rod is fixedly connected to the lower end of the magnetic plate. The lower end of the fixed rod penetrates through the top of the third sliding groove and is fixedly connected to the fourth slider. A fifth spring is sleeved on the side wall of the fixed rod. The two ends of the fifth spring are respectively fixedly connected to the top of the third sliding groove and the upper end of the fourth slider.

[0017] Preferably, an electromagnet is fixedly connected to the top of the cavity. The conductive sliding plate, the resistance ring, the electromagnet and the external power supply are electrically connected through wires.

[0018] The present invention has the following beneficial effects:

[0019] 1. By setting the laser welding mechanism, the rotation speed of the pipe during welding can be automatically adjusted according to the wall thickness of the pipe. The thinner the wall of the pipe, the longer the welding stay time during laser welding may cause the pipe to melt through, thereby causing damage to the pipe. Therefore, the thinner the wall of the pipe, the faster the pipe rotates, which can reduce the stay time of laser welding at the same point, thereby avoiding damage to the pipe.

[0020] 2. When starting to sleeve the pipe, the first arc-shaped plate can be attached to the outer wall of the pipe. Therefore, the larger the diameter of the pipe, the higher the height of the first arc-shaped plate, which drives the second slider to move upward, so that the laser welding head moves upward synchronously. Therefore, no matter what diameter of the pipe is welded, the laser welding head will maintain the same distance from the outer wall of the pipe, thereby ensuring the welding quality of the laser and having a wider application range.

[0021] 3. By setting up a grinding mechanism, during the welding process, the rotation of the fixed disk will synchronously drive the rotation of the gear ring, which in turn drives the rotation of the gear, drives the reciprocating lead screw to rotate, drives the third slider to slide reciprocally on the inner wall of the second chute, drives the adjusting rod to slide reciprocally, and then drives the grinding plate to slide reciprocally. Under the action of the fourth spring, the grinding plate will tightly abut against the pipe, so that the grinding plate can frictionally grind the welded part of the pipe, grind the welding slag clean, make the welded part of the pipe smooth and flat, improve the welding quality, and can perform grinding synchronously during the welding process, eliminating the need to set up a separate grinding device, saving costs and improving production efficiency;

[0022] 4. By setting up a cooling mechanism, during the rotation of the reciprocating lead screw, it will synchronously drive the rotation of the turntable, which in turn drives the eccentric rotation of the fourth slider and the eccentric rotation of the pin shaft. Thus, the push rod can be driven to move up and down reciprocally through the connecting rod and the connecting shaft, driving the sliding plug to slide reciprocally for sealing. The external coolant will be pumped into the sliding cylinder through the one-way liquid inlet pipe, and then the coolant in the sliding cylinder will be squeezed into the liquid inlet cavity through the one-way liquid supply pipe. Finally, the coolant is sprayed onto the surface of the pipe through multiple liquid outlet holes to cool and lower the temperature of the pipe synchronously, preventing the pipe from deforming and being damaged due to excessive temperature during welding;

[0023] 5. By setting up a cavity, a magnetic plate, a fixed rod, a fifth spring, and an electromagnet, the faster the rotation speed of the pipe, the lower the heat generated on its surface due to welding per unit time. Therefore, when welding a pipe with a thinner wall, the current applied to the electromagnet will be greater, and the magnetic suction force generated by the electromagnet will be greater, and the attraction force on the magnetic plate will be greater. As a result, the position of the magnetic plate in the cavity will be higher, and the magnetic plate will drive the fourth slider to slide towards the center of the turntable through the fixed rod. Thus, the pin shaft will be closer to the center, and the eccentric distance will be smaller, which will drive the amplitude of the up and down reciprocating movement of the push rod to decrease, resulting in less coolant being pumped in each time. Therefore, the pumping volume of the coolant can be automatically adjusted according to the thickness of the pipe wall, thereby reducing the consumption of the coolant and avoiding waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 FIG. 1 is a schematic perspective view of a laser processing and treatment device for automotive parts proposed by the present invention;

[0025] Figure 2 FIG. Figure 1 2 is a schematic cross-sectional view of the structure in FIG. 1;

[0026] Figure 3 FIG. Figure 2 3 is an enlarged schematic view of the structure at A in FIG. 2;

[0027] Figure 4 FIG. Figure 2 4 is an enlarged schematic view of the structure at B in FIG. 3;

[0028] Figure 5 is Figure 2 The enlarged schematic diagram of the structure at position C in

[0029] Figure 6 is Figure 2 The enlarged schematic diagram of the structure at position D in

[0030] In the figure: 1, base; 2, laser welding head; 3, mounting plate; 301, rotating shaft; 4, fixed disk; 5, first sliding groove; 6, first sliding block; 7, arc-shaped fixing plate; 8, sliding rod; 9, first spring; 10, mounting bracket; 11, groove; 111, second sliding block; 12, vertical rod; 13, second spring; 131, first arc-shaped plate; 14, motor; 15, cross plate; 16, vertical cylinder; 17, conductive sliding plate; 18, insulating rod; 19, second arc-shaped plate; 20, third spring; 21, resistance ring; 22, mounting block; 221, second sliding groove; 23, third sliding block; 24, vertical groove; 25, adjusting rod; 26, grinding plate; 27, fourth spring; 28, reciprocating lead screw; 29, gear; 291, toothed ring; 30, sliding cylinder; 31, sliding plug; 32, liquid inlet cavity; 33, liquid outlet hole; 34, one-way liquid supply pipe; 35, one-way liquid inlet pipe; 36, turntable; 37, third sliding groove; 38, fourth sliding block; 39, pin shaft; 40, connecting rod; 41, push rod; 42, connecting shaft; 43, cavity; 44, magnetic plate; 45, fixed rod; 46, fifth spring; 47, electromagnet. Detailed implementation manners

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the following will describe the detailed implementation manners of the present invention in conjunction with the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific implementations disclosed below.

[0032] Refer to Figure 1 - Figure 6 , an automobile part laser processing device, including a base 1 and a laser welding head 2. The laser welding head 2 can be controlled by an external control program to perform laser welding, which is prior art and will not be elaborated herein;

[0033] Laser welding mechanism. The laser welding mechanism includes a mounting plate 3 fixedly connected to the upper end of the base 1. A rotating shaft 301 is rotatably connected to the side wall of the mounting plate 3. A fixed disk 4 is fixedly connected to the side wall of the rotating shaft 301. A first sliding groove 5 is formed in the side wall of the fixed disk 4. Two first sliding blocks 6 are symmetrically and slidably connected to the inner wall of the first sliding groove 5. Arc-shaped fixing plates 7 are fixedly connected to the side walls of the two first sliding blocks 6. A sliding rod 8 is fixedly connected to the inner wall of the first sliding groove 5. The side wall of the sliding rod 8 is slidably connected to the two first sliding blocks 6. A first spring 9 is sleeved on the side wall of the sliding rod 8. The two ends of the first spring 9 are respectively fixedly connected to the side walls of the two first sliding blocks 6. An installation frame 10 is fixedly connected to the upper end of the base 1. A groove 11 is formed in the side wall of the installation frame 10. A second sliding block 111 is slidably connected to the inner wall of the groove 11. The laser welding head 2 is fixedly connected to the side wall of the second sliding block 111. A vertical rod 12 is fixedly connected to the lower end of the second sliding block 111. A second spring 13 is sleeved on the side wall of the vertical rod 12. The two ends of the second spring 13 are respectively fixedly connected to the lower end of the second sliding block 111 and the inner bottom of the groove 11. The lower end of the vertical rod 12 penetrates through the inner top of the installation frame 10 and is fixedly connected to a first arc-shaped plate 131. A motor 14 is fixedly connected to the side wall of the mounting plate 3. The output end of the motor 14 penetrates through the side wall of the mounting plate 3 and is fixedly connected to the rotating shaft 301.

[0034] Further, start the motor 14 and the laser welding head 2. The motor 14 will drive the rotating shaft 301 to rotate, and then drive the fixed disk 4 to rotate, driving the fixed pipe to rotate. Then, the laser welding head 2 can weld the connection part of the pipe in a circle to make it connected.

[0035] It is worth mentioning that when starting to sleeve the pipe, the first arc-shaped plate 131 can fit the outer wall of the pipe. Then, the larger the diameter of the pipe, the higher the height of the first arc-shaped plate 131, which drives the second sliding block 111 to move upward, making the laser welding head 2 move upward synchronously. Then, no matter what diameter of the pipe is welded, the laser welding head 2 will keep the same distance from the outer wall of the pipe, ensuring the welding quality of the laser and having a wider application range.

[0036] The laser welding mechanism further includes a cross plate 15 fixedly connected to the side wall of the first arc-shaped plate 131. A vertical cylinder 16 is fixedly connected to the lower end of the cross plate 15. A conductive sliding plate 17 is slidably connected to the inner wall of the vertical cylinder 16. An insulating rod 18 is fixedly connected to the lower end of the conductive sliding plate 17. The lower end of the insulating rod 18 penetrates through the lower end of the vertical cylinder 16 and is fixedly connected to a second arc-shaped plate 19. A third spring 20 is sleeved on the side wall of the insulating rod 18. An insulating sleeve is sleeved on the side wall of the third spring 20, playing a good insulating role. The two ends of the third spring 20 are respectively fixedly connected to the lower end of the conductive sliding plate 17 and the inner bottom of the vertical cylinder 16. A resistance ring 21 is embedded in the inner wall of the vertical cylinder 16. The motor 14, the conductive sliding plate 17, the resistance ring 21 and the external power supply are electrically connected through wires.

[0037] Furthermore, the second arc-shaped plate 19 will simultaneously abut against the upper arc-shaped fixing plate 7. Then, the wall thickness of the pipe to be welded is measured by the first arc-shaped plate 131 and the second arc-shaped plate 19. If the wall thickness of the pipe is thinner, the position of the conductive slide plate 17 in the vertical cylinder 16 will be lower. As a result, the resistance connected to the circuit is smaller, and thus the current flowing into the motor 14 is larger, making the speed of the motor 14 faster. Consequently, the speed of driving the pipe to rotate is faster. Since the thinner the pipe wall, the longer the welding residence time during laser welding may cause the pipe to melt through, thereby damaging the pipe. Therefore, the thinner the pipe wall, the faster the pipe rotates, which can reduce the residence time of laser welding at the same point and thus avoid damaging the pipe.

[0038] A grinding mechanism is installed on the base 1. The grinding mechanism includes a mounting block 22 fixedly connected to the upper end of the base 1 through a bracket. A second chute 221 is opened at the upper end of the mounting block 22. A third slider 23 is slidably connected to the inner wall of the second chute 221. A vertical groove 24 is opened at the upper end of the third slider 23. An adjusting rod 25 is slidably connected to the inner wall of the vertical groove 24. A grinding plate 26 is fixedly connected to the upper end of the adjusting rod 25. A fourth spring 27 is fixedly connected to the bottom of the vertical groove 24. The upper end of the fourth spring 27 is fixedly connected to the lower end of the adjusting rod 25.

[0039] The grinding mechanism includes a reciprocating lead screw 28 rotatably connected to the inner wall of the second chute 221. The side wall of the reciprocating lead screw 28 is threadedly connected to the third slider 23. One end of the reciprocating lead screw 28 close to the mounting plate 3 penetrates through the side wall of the mounting block 22 and is fixedly connected to a gear 29. A toothed ring 291 is fixedly connected to the side wall of the fixed disk 4. The toothed ring 291 is meshed and connected with the gear 29.

[0040] Furthermore, during the welding process, the rotation of the fixed disk 4 will simultaneously drive the rotation of the toothed ring 291, thereby driving the rotation of the gear 29, driving the rotation of the reciprocating lead screw 28, driving the third slider 23 to reciprocate and slide on the inner wall of the second chute 221, driving the adjusting rod 25 to reciprocate and slide, and then driving the grinding plate 26 to reciprocate and slide. Under the action of the fourth spring 27, the grinding plate 26 will closely abut against the pipe. Then, the grinding plate 26 can friction-grind the welded part of the pipe to grind the welding slag clean, making the welded part of the pipe smooth and flat, improving the welding quality, and can perform grinding synchronously during the welding process, eliminating the need to separately set up grinding equipment, saving costs, and improving production efficiency.

[0041] A cooling mechanism is installed on the base 1. The cooling mechanism includes a sliding cylinder 30 fixedly connected to the upper end of the base 1. A sliding plug 31 is hermetically and slidably connected to the inner wall of the sliding cylinder 30. A liquid inlet cavity 32 is formed in the polishing plate 26. A plurality of liquid outlet holes 33 are formed in the top of the liquid inlet cavity 32. The sliding cylinder 30 is communicated with the liquid inlet cavity 32 through a one-way liquid supply pipe 34. The one-way liquid supply pipe 34 only allows the coolant in the sliding cylinder 30 to enter the liquid inlet cavity 32. A one-way liquid inlet pipe 35 is fixedly connected to the inner wall of the sliding cylinder 30. The other end of the one-way liquid inlet pipe 35 is communicated with a container storing coolant outside, and the one-way liquid inlet pipe 35 only allows the external coolant to enter the sliding cylinder 30.

[0042] The cooling mechanism further includes a turntable 36 fixedly connected to one end of the reciprocating lead screw 28. A third sliding groove 37 is formed in the side wall of the turntable 36. A fourth slider 38 is slidably connected to the inner wall of the third sliding groove 37. A pin shaft 39 is fixedly connected to the side wall of the fourth slider 38. A connecting rod 40 is rotatably connected to the side wall of the pin shaft 39. The upper end of the sliding plug 31 is fixedly connected with a push rod 41. The upper end of the push rod 41 penetrates through the upper end of the sliding cylinder 30 and is fixedly connected with a connecting shaft 42. The lower end of the connecting rod 40 is rotatably connected with the connecting shaft 42.

[0043] Further, during the rotation of the reciprocating lead screw 28, the turntable 36 will be driven to rotate synchronously, and then the fourth slider 38 will be driven to rotate eccentrically, driving the pin shaft 39 to rotate eccentrically. Thus, the push rod 41 can be driven to move up and down reciprocally through the connecting rod 40 and the connecting shaft 42, driving the sliding plug 31 to slide reciprocally in a sealed manner. The external coolant will be pumped into the sliding cylinder 30 through the one-way liquid inlet pipe 35. Then, the coolant in the sliding cylinder 30 will be squeezed into the liquid inlet cavity 32 through the one-way liquid supply pipe 34. Finally, the coolant is sprayed onto the surface of the pipe through a plurality of liquid outlet holes 33 to cool and lower the temperature of the pipe synchronously, avoiding the deformation and damage of the pipe caused by excessive temperature during welding.

[0044] A cavity 43 is formed in the turntable 36. A magnetic plate 44 is slidably connected to the inner wall of the cavity 43. A fixed rod 45 is fixedly connected to the lower end of the magnetic plate 44. The lower end of the fixed rod 45 penetrates through the top of the third sliding groove 37 and is fixedly connected with the fourth slider 38. A fifth spring 46 is sleeved on the side wall of the fixed rod 45. The two ends of the fifth spring 46 are respectively fixedly connected with the top of the third sliding groove 37 and the upper end of the fourth slider 38. An electromagnet 47 is fixedly connected to the top of the cavity 43. The conductive sliding plate 17, the resistance ring 21, the electromagnet 47 and an external power supply are electrically connected through wires.

[0045] Furthermore, the faster the pipe rotates, the lower the heat generated on its surface per unit time due to welding. Thus, when welding a pipe with a thinner wall, the current applied to the electromagnet 47 will be greater, and the magnetic suction force generated by the electromagnet 47 will be greater, resulting in a greater attraction force on the magnetic plate 44. As a result, the position of the magnetic plate 44 in the cavity 43 will be higher. Then, the magnetic plate 44 will drive the fourth slider 38 to slide towards the center of the turntable 36 through the fixed rod 45. Consequently, the pin shaft 39 will be closer to the center, and the eccentricity distance will be smaller. This will lead to a decrease in the amplitude of the reciprocating movement of the push rod 41 up and down, reducing the amount of coolant pumped in each time. Therefore, the amount of coolant pumped in can be automatically adjusted according to the thickness of the pipe wall, thereby reducing the consumption of coolant and avoiding waste.

[0046] In the present invention, when laser welding the pipe components of an automobile, first, the two pipes to be welded are sleeved outside the two arc-shaped fixing plates 7, and their pipe walls pass through between the arc-shaped fixing plate 7 and the first arc-shaped plate 131, as well as between the arc-shaped fixing plate 7 and the second arc-shaped plate 19. Under the action of the first spring 9, the two arc-shaped fixing plates 7 will tightly fit the inner wall of the pipe, thus fixing the two ends of the pipe.

[0047] Then, start the motor 14 and the laser welding head 2. The motor 14 will drive the rotating shaft 301 to rotate, and then drive the fixed disk 4 to rotate, driving the fixed pipes to rotate. Then, the laser welding head 2 can weld the connection part of the pipes in a circle to connect them. During the welding process, the rotation of the fixed disk 4 will synchronously drive the gear ring 291 to rotate, and then drive the gear 29 to rotate, driving the reciprocating lead screw 28 to rotate, driving the third slider 23 to reciprocate and slide on the inner wall of the second chute 221, driving the adjusting rod 25 to reciprocate and slide, and then driving the grinding plate 26 to reciprocate and slide. Under the action of the fourth spring 27, the grinding plate 26 will tightly abut against the pipe. Thus, the grinding plate 26 can frictionally grind the welded part of the pipe to grind the welding slag clean, making the welded part of the pipe smooth and flat, improving the welding quality. Moreover, grinding can be carried out synchronously during the welding process without the need to separately set up grinding equipment, saving costs and improving production efficiency.

[0048] During the rotation of the reciprocating lead screw 28, the turntable 36 will be driven to rotate synchronously, and then drive the fourth slider 38 to rotate eccentrically, driving the pin shaft 39 to rotate eccentrically. Thus, the push rod 41 can be driven to reciprocate up and down through the connecting rod 40 and the connecting shaft 42, driving the sliding plug 31 to reciprocate and seal and slide. The external coolant will be pumped into the sliding cylinder 30 through the one-way liquid inlet pipe 35. Then, the coolant in the sliding cylinder 30 will be squeezed into the liquid inlet cavity 32 through the one-way liquid supply pipe 34. Finally, the coolant is sprayed onto the pipe surface through multiple liquid outlet holes 33 to synchronously cool and lower the temperature of the pipe, avoiding deformation and damage of the pipe due to excessive temperature during welding.

[0049] In addition, when the pipe is initially fitted, the first curved plate 131 can fit against the outer wall of the pipe, and the larger the diameter of the pipe, the higher the height of the first curved plate 131, thereby driving the second slider 111 to move upward, causing the laser welding head 2 to move upward synchronously, and no matter what diameter of the pipe is welded, the laser welding head 2 will maintain the same distance from the outer wall of the pipe, thereby ensuring the quality of laser welding and having a wider range of applications.

[0050] In addition, the second arc plate 19 will synchronously abut against the upper arc fixed plate 7, and then measure the wall thickness of the pipe to be welded through the first arc plate 131 and the second arc plate 19. If the wall thickness of the pipe is thinner, the position of the conductive slide plate 17 in the vertical cylinder 16 will be lower, and the resistance connected to the circuit will be smaller, so that the current passed into the motor 14 will be greater, making the speed of the motor 14 faster, and thus driving the pipe to rotate faster. Because the thinner the wall of the pipe, the longer the welding time during laser welding may cause the pipe to melt through, and then cause damage to the pipe. Therefore, the thinner the wall of the pipe, the faster the pipe rotates, which can reduce the dwell time of laser welding at the same point, thereby avoiding damage to the pipe.

[0051] When the pipe rotates faster, the heat generated by welding on its surface per unit time will be reduced. When welding a thinner pipe, the current passed through the electromagnet 47 will be greater, and the magnetic attraction generated by the electromagnet 47 will be greater, and the attraction to the magnetic plate 44 will be greater, so that the position of the magnetic plate 44 in the cavity 43 will be higher. Then the magnetic plate 44 will drive the fourth slider 38 to slide toward the center of the turntable 36 through the fixed rod 45, and the pin shaft 39 will be closer to the center of the circle, and the eccentric distance will be smaller, which will drive the push rod 41 to move up and down The amplitude of the reciprocating movement is reduced, so that the amount of coolant pumped in each time is reduced. Therefore, the amount of coolant pumped in can be automatically adjusted according to the thickness of the pipe wall, thereby reducing the consumption of coolant and avoiding waste.

[0052] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A laser processing device for automotive parts, characterized in that, Comprising: a base (1) and a laser welding head (2); a laser welding mechanism, the laser welding mechanism includes a mounting plate (3) fixedly connected to the upper end of the base (1), a rotating shaft (301) is rotatably connected to the side wall of the mounting plate (3), a fixed disk (4) is fixedly connected to the side wall of the rotating shaft (301), a first sliding groove (5) is formed in the side wall of the fixed disk (4), two first sliding blocks (6) are symmetrically slidably connected to the inner wall of the first sliding groove (5), arc-shaped fixing plates (7) are fixedly connected to the side walls of the two first sliding blocks (6), a sliding rod (8) is fixedly connected to the inner wall of the first sliding groove (5), the sliding rod (8) is slidably connected to the two first sliding blocks (6), a first spring (9) is sleeved on the sliding rod (8), and two ends of the first spring (9) are respectively fixedly connected to the side walls of the two first sliding blocks (6), a mounting frame (10) is fixedly connected to the upper end of the base (1), a groove (11) is formed in the side wall of the mounting frame (10), a second sliding block (111) is slidably connected to the inner wall of the groove (11), a vertical rod (12) is fixedly connected to the lower end of the second sliding block (111), a second spring (13) is sleeved on the vertical rod (12), and two ends of the second spring (13) are respectively fixedly connected to the lower end of the second sliding block (111) and the inner bottom of the groove (11), the lower end of the vertical rod (12) penetrates through the groove (11) and is fixedly connected to a first arc-shaped plate (131), a motor (14) is fixedly connected to the side wall of the mounting plate (3), and an output end of the motor (14) penetrates through the side wall of the mounting plate (3) and is fixedly connected to the rotating shaft (301); The laser welding mechanism further includes a cross plate (15) fixedly connected to the side wall of the first arc-shaped plate (131), a vertical cylinder (16) is fixedly connected to the lower end of the cross plate (15), a conductive sliding plate (17) is slidably connected to the inner wall of the vertical cylinder (16), an insulating rod (18) is fixedly connected to the lower end of the conductive sliding plate (17), the lower end of the insulating rod (18) penetrates through the lower end of the vertical cylinder (16) and is fixedly connected to a second arc-shaped plate (19), a third spring (20) is sleeved on the insulating rod (18), and two ends of the third spring (20) are respectively fixedly connected to the lower end of the conductive sliding plate (17) and the inner bottom of the vertical cylinder (16), a resistance ring (21) is embedded in the inner wall of the vertical cylinder (16), and the motor (14), the conductive sliding plate (17), the resistance ring (21) and an external power supply are electrically connected through wires; a grinding mechanism is installed on the base (1), the grinding mechanism includes a mounting block (22) fixedly connected to the upper end of the base (1) through a bracket, a second sliding groove (221) is formed in the upper end of the mounting block (22), a third sliding block (23) is slidably connected to the inner wall of the second sliding groove (221), a vertical groove (24) is formed in the upper end of the third sliding block (23), an adjusting rod (25) is slidably connected to the inner wall of the vertical groove (24), a grinding plate (26) is fixedly connected to the upper end of the adjusting rod (25), a fourth spring (27) is fixedly connected to the inner bottom of the vertical groove (24), and the upper end of the fourth spring (27) is fixedly connected to the lower end of the adjusting rod (25); The grinding mechanism further includes a reciprocating lead screw (28) rotatably connected to the inner wall of the second chute (221). The reciprocating lead screw (28) is threadedly connected to the third slider (23). One end of the reciprocating lead screw (28) close to the mounting plate (3) penetrates through the side wall of the mounting block (22) and is fixedly connected to a gear (29). A toothed ring (291) is fixedly connected to the fixed disk (4), and the toothed ring (291) is meshed with the gear (29). A cooling mechanism is installed on the base (1). The cooling mechanism includes a sliding cylinder (30) fixedly connected to the upper end of the base (1). A sliding plug (31) is hermetically and slidably connected to the inner wall of the sliding cylinder (30). A liquid inlet cavity (32) is formed in the grinding plate (26). A plurality of liquid outlet holes (33) are formed in the top of the liquid inlet cavity (32). The sliding cylinder (30) is communicated with the liquid inlet cavity (32) through a one-way liquid supply pipe (34). A one-way liquid inlet pipe (35) is fixedly connected to the inner wall of the sliding cylinder (30). The cooling mechanism further includes a turntable (36) fixedly connected to one end of the reciprocating lead screw (28). A third chute (37) is formed in the side wall of the turntable (36). A fourth slider (38) is slidably connected to the inner wall of the third chute (37). A pin shaft (39) is fixedly connected to the side wall of the fourth slider (38). The pin shaft (39) is rotatably connected to a connecting rod (40). A push rod (41) is fixedly connected to the upper end of the sliding plug (31). The upper end of the push rod (41) penetrates through the upper end of the sliding cylinder (30) and is fixedly connected to a connecting shaft (42). The lower end of the connecting rod (40) is rotatably connected to the connecting shaft (42).

2. The laser processing device for automotive parts according to claim 1, wherein Wherein: The laser welding head (2) is fixedly connected to the side wall of the second slider (111).

3. A laser processing device for automotive parts according to claim 1, characterized in that, Wherein: An insulating sleeve is sleeved on the third spring (20).

4. A laser processing device for automotive parts according to claim 1, characterized in that, Wherein: A cavity (43) is formed in the turntable (36). A magnetic plate (44) is slidably connected to the inner wall of the cavity (43). A fixing rod (45) is fixedly connected to the lower end of the magnetic plate (44). The lower end of the fixing rod (45) penetrates through the top of the third chute (37) and is fixedly connected to the fourth slider (38). A fifth spring (46) is sleeved on the fixing rod (45). Two ends of the fifth spring (46) are respectively fixedly connected to the top of the third chute (37) and the upper end of the fourth slider (38).

5. The laser processing device for automotive parts according to claim 4, characterized in that, Wherein: An electromagnet (47) is fixedly connected to the top of the cavity (43). The conductive sliding plate (17), the resistance ring (21), the electromagnet (47) and an external power supply are electrically connected through wires.

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