Laser welding device

Abstract

The present invention relates to the field of laser welding technology, specifically to a laser welding device, including a welding splicing table, a support frame is fixed to the outer wall of the welding splicing table, a first slide groove is provided on the inner wall of the support frame, and a sliding frame is slidably provided on the inner wall of the first slide groove. The laser welding device, as the slider moves downward, moves the nozzle downward synchronously, causing the nozzle to extend downward a part, that is, while increasing the gas volume, the angle between the nozzle and the laser welder becomes larger, and the nozzle end becomes longer so that it can be directly sprayed onto the weld surface, and at this time, the downward movement of the nozzle causes the blocking block to slide along the inclined groove, and since the inclined groove is an inclined groove, the angle between the two inclined grooves becomes smaller as it goes downward, therefore, at this time, as the nozzle moves downward, the two blocking blocks slide along the inclined groove, causing the two blocking blocks to gradually slide closer along the inside of the nozzle.

Description

Technical Field

[0001] The invention relates to the technical field of laser welding, in particular to a laser welding device. Background Art

[0002] Common welding methods include electric welding, gas welding and laser welding. Laser welding is one of the important aspects of the application of laser material processing technology. The laser welding process is a heat conduction type, that is, the laser radiation heats the surface of the workpiece, and the surface heat diffuses to the inside through heat conduction. By controlling the width, energy, peak power and repetition frequency of the laser pulse, the workpiece is melted to form a specific molten pool. During the laser welding process, it is usually necessary to continuously introduce protective gas into the laser welding head and the weld to protect the molten pool, prevent oxidation, reduce pore formation, and inhibit plasma cloud shielding;

[0003] During the welding process, the existing laser welding devices on the market require the user to adjust the angle of the shielding gas output according to the size of the weld to achieve the best protection effect. In addition, the shielding gas is blown at different angles, and the user usually needs to manually adjust the angle of the shielding gas output during the welding process, which is particularly inconvenient. In addition, the shielding gas only acts on one side of the weld, which can easily cause oxidation in other directions of the weld. Summary of the invention

[0004] The present invention provides a laser welding device, which has the beneficial effect of conveniently adjusting the output angle of the shielding gas, and the shielding gas can act on all directions of the welding point to the greatest extent, solving the problem mentioned in the above background technology that the output angle of the shielding gas usually needs to be adjusted manually during the welding process, which is particularly inconvenient, and the shielding gas only acts on one side of the welding point, which easily leads to oxidation problems in other directions of the welding point. In order to achieve the above purpose, the present invention provides the following technical solutions: A laser welding device, including a welding splicing table, the outer wall of the welding splicing table is fixed with a support frame, the inner wall of the support frame is provided with a first slide groove, the inner wall of the first slide groove is slidably provided with a sliding frame, the outer wall of the sliding frame is provided with a second slide groove, the inner wall of the second slide groove is slidably provided with a first slider, the outer wall of the first slider is installed with a fourth cylinder, the output end of the fourth cylinder is fixed with a fixed plate, the outer wall of the fixed plate is installed with a motor, the output end of the motor is fixed with a first gear, the outer wall of the first gear is meshed with a second gear, and one end of the second gear is fixed with a fixed frame;

[0005] A lifting plate is slidably provided on the inner wall of the fixed frame, a first return spring is fixed on the outer wall of the lifting plate, and one end of the first return spring is fixed to the inner wall of the fixed frame;

[0006] The outer wall of the lifting plate is provided with a through groove, the inner wall of the through groove is fixed with a transverse axis, the outer wall of the transverse axis is sleeved with a slider frame, the outer wall of the slider frame is provided with a fourth slide groove, and the transverse axis is slidably arranged on the inner wall of the fourth slide groove; the outer wall of the slider frame is installed with an air pump.

[0007] As an optional solution of the laser welding device described in the present invention, a protective gas pipe is fixed to the input end of the gas pump, a first sleeve is fixed to the output end of the gas pump, a second sleeve is slidably provided on the inner wall of the first sleeve, a second return spring is fixed to the outer wall of the second sleeve, and one end of the second return spring is fixed to the outer wall of the first sleeve.

[0008] As an optional solution of the laser welding device described in the present invention, wherein: a first convex block is fixed to the end of the second sleeve, a fixing frame is fixed to the outer wall of the fixing frame, a second convex block is fixed to the outer wall of the fixing frame, and the ends of the first convex block and the second convex block are both set to spherical surfaces;

[0009] The outer wall of the fixing frame is rotatably provided with a plurality of evenly distributed balls, the outer wall of the fixing frame is rotatably provided with a rotating shaft, and one end of the rotating shaft is fixed to the outer wall of the first sleeve.

[0010] As an optional solution of the laser welding device described in the present invention, the end of the second sleeve is provided with a first inclined surface, the outer wall of the first sleeve is provided with a ventilation groove, and the outer wall of the first sleeve is fixed with a fixed circular frame.

[0011] As an optional solution of the laser welding device described in the present invention, the fixed circular frame is connected to the ventilation groove, a slider is slidably provided on the inner wall of the fixed circular frame, a third return spring is fixed to the outer wall of the slider, one end of the third return spring is fixed to the outer wall of the first sleeve, an air outlet is opened on the outer wall of the slider, and a first resistance block is fixed to the inner wall of the air outlet.

[0012] As an optional solution of the laser welding device described in the present invention, a nozzle is fixed on the outer wall of the sliding block, a blocking block is slidably provided on the inner wall of the nozzle, an inclined groove is opened on the inner wall of the fixed circular frame, and the blocking block slides in the inclined groove.

[0013] As an optional solution of the laser welding device described in the present invention, a second slider is fixed to the outer wall of the lifting plate, a third slide groove is opened on the inner wall of the fixed frame, and the second slider slides on the inner wall of the third slide groove.

[0014] As an optional solution of the laser welding device described in the present invention, two first cylinders are installed on the outer wall of the welding splicing table, and a sliding plate is fixed to the output end of the first cylinder.

[0015] As an optional solution of the laser welding device described in the present invention, wherein: a second cylinder is installed on the outer wall of the support frame, the output end of the second cylinder is fixed to the outer wall of the sliding frame, the outer wall of the support frame is provided with a first slide groove, the sliding frame slides on the inner wall of the first slide groove, a third cylinder is installed on the outer wall of the sliding frame, and the output end of the third cylinder is fixed to the outer wall of the first sliding block;

[0016] A laser welder is installed on the inner wall of the lifting plate.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] In the present invention, the gas delivery pump is started to extract the external inert gas tank through the protective gas delivery pipe, and transport it to the transfer gas tank, and finally blown out through the nozzle. The inert gas, that is, the protective gas, is blown between the laser welder and the welding point to perform anti-oxidation protection. At this time, due to the rotation of the fixed frame, the nozzle moves in a circular trajectory to blow out protective gas in all directions of the laser welder being welded, thereby providing a wider range of protection.

[0019] In the present invention, when the lifting plate moves upward, the horizontal axis will move upward synchronously, and at this time, the upward movement of the horizontal axis will slide along the fourth slide groove. As the slider frame moves upward, a force is applied to the slider frame. After the force is applied, the slider frame rotates along the rotating connection between the rotating axis and the fixed frame with the rotating axis. The rotation of the slider frame causes the angle between the nozzle and the laser welder to gradually decrease from the initial maximum angle, thereby achieving adaptation to changes in the melt width.

[0020] In the present invention, as the second sleeve continuously enters into the transfer gas groove, the space in the transfer gas groove gradually shrinks, and the second sleeve gradually blocks the connection between the transfer gas groove and the abutment block. Therefore, under the same outlet pressure, the inner contour of the outlet shrinks. At this time, the outlet pressure of the nozzle increases, which makes the smaller the angle between the nozzle and the laser welder, the greater the outlet pressure of the nozzle. This can prevent the nozzle outlet from gradually tending to blow directly on the surface of the weldment when the angle between the nozzle and the laser welder becomes smaller, thereby preventing the shielding gas from weakening the airflow at the weld.

[0021] In the present invention, as the slider moves downward, the nozzle moves downward synchronously, causing the nozzle to extend downward, that is, while increasing the gas volume, the angle between the nozzle and the laser welder becomes larger, and the nozzle tip becomes longer so that it can be sprayed directly onto the weld surface. At this time, the nozzle moves downward and causes the blocking block to slide along the inclined groove. Since the inclined groove is an inclined groove, the angle between the two inclined grooves becomes smaller as it moves downward. Therefore, at this time, as the nozzle moves downward, the two blocking blocks slide along the inclined groove, causing the two blocking blocks to gradually slide closer to each other along the inside of the nozzle. While approaching, the two blocking blocks will hinder the airflow passing through the inner wall of the nozzle, that is, the size of the vent in the nozzle is reduced, and the gas pressure ejected from the nozzle is further increased.

[0022] When the first sleeve rotates in the reverse reset direction, the second sleeve is prompted to gradually release the blockage of the notch position of the ventilation groove. At this time, the third reset spring resets and moves the slider upward, and the upward movement of the slider brings the nozzle head upward. As the nozzle head moves upward, the blocking block is prompted to slide upward along the inclined groove. It should be noted that the blocking block slides in the inclined groove and cannot be separated from the outside of the inclined groove. At this time, the two blocking blocks move away from each other along the inner wall of the nozzle head, which increases the gas outlet area in the nozzle head. At this time, the nozzle head jet pressure decreases, that is, as the first sleeve resets and swings to the initial direction, the angle between the nozzle head and the laser welder becomes smaller, and the nozzle head jet can blow toward the outer wall of the laser welder. The protective gas blows along the laser welder to the weld being welded, and at this time, the second sleeve releases the blockage of the ventilation groove, prompting the nozzle head to move up, and the nozzle head jet is weakened; in order to adapt to different requirements of melting width and melting depth. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the fixing frame and its surrounding structures of the present invention;

[0025] Figure 3 It is a schematic diagram of the cross-sectional structure of the fixing frame of the present invention;

[0026] Figure 4 For the present invention Figure 3 The enlarged structural diagram at B in the middle;

[0027] Figure 5 For the present invention Figure 2 Further cross-sectional structural diagram;

[0028] Figure 6 For the present invention Figure 5 The enlarged structural diagram at A in the middle;

[0029] Figure 7 For the present invention Figure 5The enlarged structural diagram at C in the middle;

[0030] Figure 8 It is a schematic diagram of the cross-sectional structure of the first sleeve and its surroundings of the present invention.

[0031] Figure numerals: 1, welding and splicing table; 2, support frame; 3, first cylinder; 4, sliding plate; 5, second cylinder; 6, first slider; 7, first slide groove; 8, sliding frame; 9, second slide groove; 10, third cylinder; 11, fourth cylinder; 12, fixed plate; 13, motor; 14, first gear; 15, second gear; 16, fixed frame; 17, first return spring; 18, lifting plate; 19, second slider; 20, third slide groove; 21, laser welder; 22, through groove; 23, horizontal axis; 24. Slider frame; 25. Fourth slide groove; 26. Air pump; 27. Protective gas delivery pipe; 28. First sleeve; 281. Rotating shaft; 282. First inclined plane; 29. ​​Second sleeve; 30. First protrusion; 31. Fixed frame; 32. Second protrusion; 33. Ball; 34. Second return spring; 37. Fixed circular frame; 61. First resistance block; 62. Slider; 63. Air outlet; 64. Injection head; 65. Blocking block; 66. Inclined groove; 67. Ventilation groove; 68. Third return spring. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] This example is intended to help solve the problem, please refer to Figure 1-Figure 8 A laser welding device comprises a welding and splicing table 1, a support frame 2 is fixed to the outer wall of the welding and splicing table 1, a first slide groove 7 is provided on the inner wall of the support frame 2, a sliding frame 8 is slidably provided on the inner wall of the first slide groove 7, a second slide groove 9 is provided on the outer wall of the sliding frame 8, a first slider 6 is slidably provided on the inner wall of the second slide groove 9, a fourth cylinder 11 is installed on the outer wall of the first slider 6, a fixing plate 12 is fixed to the output end of the fourth cylinder 11, a motor 13 is installed on the outer wall of the fixing plate 12, a first gear 14 is fixed to the output end of the motor 13, a second gear 15 is meshed with the outer wall of the first gear 14, and a fixing frame 16 is fixed to one end of the second gear 15;

[0034] A lifting plate 18 is slidably provided on the inner wall of the fixed frame 16, and a first return spring 17 is fixed on the outer wall of the lifting plate 18, and one end of the first return spring 17 is fixed to the inner wall of the fixed frame 16;

[0035] The outer wall of the lifting plate 18 is provided with a through slot 22, the inner wall of the through slot 22 is fixed with a transverse shaft 23, the outer wall of the transverse shaft 23 is sleeved with a slider frame 24, the outer wall of the slider frame 24 is provided with a fourth slide slot 25, the transverse shaft 23 is slidably arranged on the inner wall of the fourth slide slot 25; the outer wall of the slider frame 24 is installed with an air pump 26;

[0036] A protective gas delivery pipe 27 is fixed to the input end of the gas delivery pump 26, and a first sleeve 28 is fixed to the output end of the gas delivery pump 26. A second sleeve 29 is slidably provided on the inner wall of the first sleeve 28, and a second return spring 34 is fixed to the outer wall of the second sleeve 29. One end of the second return spring 34 is fixed to the outer wall of the first sleeve 28.

[0037] A first protrusion 30 is fixed to the end of the second sleeve 29, a fixing frame 31 is fixed to the outer wall of the fixing frame 16, a second protrusion 32 is fixed to the outer wall of the fixing frame 31, and the ends of the first protrusion 30 and the second protrusion 32 are both set to spherical surfaces;

[0038] The outer wall of the fixing frame 31 is rotatably provided with a plurality of evenly distributed balls 33, and the outer wall of the fixing frame 31 is rotatably provided with a rotating shaft 281, and one end of the rotating shaft 281 is fixed to the outer wall of the first sleeve 28;

[0039] The end of the second sleeve 29 is provided with a first inclined surface 282, the outer wall of the first sleeve 28 is provided with a venting groove 67, and the outer wall of the first sleeve 28 is fixed with a fixed circular frame 37;

[0040] The fixed circular frame 37 is connected to the ventilation groove 67. A slider 62 is slidably provided on the inner wall of the fixed circular frame 37. A third return spring 68 is fixed to the outer wall of the slider 62. One end of the third return spring 68 is fixed to the outer wall of the first sleeve 28. An air outlet 63 is provided on the outer wall of the slider 62. A first abutment block 61 is fixed to the inner wall of the air outlet 63.

[0041] The outer wall of the slider 62 is fixed with a nozzle 64, the inner wall of the nozzle 64 is slidably provided with a stopper 65, the inner wall of the fixed circular frame 37 is provided with an inclined groove 66, and the stopper 65 slides in the inclined groove 66;

[0042] A second slider 19 is fixed to the outer wall of the lifting plate 18, a third slide groove 20 is opened on the inner wall of the fixed frame 16, and the second slider 19 slides on the inner wall of the third slide groove 20;

[0043] Two first cylinders 3 are installed on the outer wall of the welding and splicing table 1, and a sliding plate 4 is fixed to the output end of the first cylinder 3;

[0044] A second cylinder 5 is installed on the outer wall of the support frame 2, and the output end of the second cylinder 5 is fixed to the outer wall of the sliding frame 8. A first sliding groove 7 is opened on the outer wall of the support frame 2, and the sliding frame 8 slides on the inner wall of the first sliding groove 7. A third cylinder 10 is installed on the outer wall of the sliding frame 8, and the output end of the third cylinder 10 is fixed to the outer wall of the first sliding block 6;

[0045] A laser welder 21 is installed on the inner wall of the lifting plate 18 .

[0046] In this embodiment: common welding methods include electric welding, gas welding and laser welding. Laser welding is one of the important aspects of the application of laser material processing technology. The laser welding process is a heat conduction type, that is, the laser radiation heats the surface of the workpiece, and the surface heat diffuses to the inside through heat conduction. By controlling the width, energy, peak power and repetition frequency of the laser pulse, the workpiece is melted to form a specific molten pool. During the laser welding process, it is usually necessary to continuously introduce a protective gas into the laser welding head and the weld to protect the molten pool, prevent oxidation, reduce pore generation, and inhibit plasma cloud shielding;

[0047] During the welding process, the existing laser welding devices on the market require the user to adjust the angle of the shielding gas output according to the size of the weld to achieve the best protection effect. In addition, the shielding gas blown at different angles usually requires the user to manually adjust the shielding gas output angle during the welding process, which is particularly inconvenient. In addition, the shielding gas only acts on one side of the weld, which easily leads to oxidation in other directions of the weld.

[0048] In order to avoid the above situation, when using the laser welding device, firstly, the two metal plates to be welded are placed on the surface of the welding splicing table 1 in sequence, and then the first cylinders 3 on both sides of the welding splicing table 1 are started, and the first cylinders 3 bring the sliding plates 4 at the output ends closer to each other to butt the two metal plates;

[0049] Then, the second cylinder 5 is started to move the sliding frame 8 and the fixing plate 12 to the weld between the metal plates to be welded, and then the third cylinder 10 is started to move the first sliding block 6 to the outermost side of the weld, completing the pre-welding preparation work;

[0050] Then the fourth cylinder 11 is started, and after the fourth cylinder 11 is started, the fixed plate 12 at the output end is moved downward until the bottom end of the laser welder 21 lightly touches the weld seam, and the fourth cylinder 11 is turned off. At this time, the laser welder 21 and the third cylinder 10 are started at the same time, and the third cylinder 10 will drive the laser welder 21 to weld along the joint of the two metal plates;

[0051] It should be noted that the initial position of the laser welder 21 is lower than the distance of one end of the fixing frame 31;

[0052] At the same time, the motor 13 is started. After the motor 13 is started, the first gear 14 at the output end is rotated. When the first gear 14 rotates, it rotates with the second gear 15 through meshing. During the rotation of the second gear 15, the fixed frame 16 is rotated synchronously. When the fixed frame 16 rotates, the lifting plate 18 on the inner wall is rotated synchronously. The lifting plate 18 rotates and the slider frame 24, the gas pump 26 and the nozzle head 64 move in a circular trajectory around the output end of the laser welder 21. At this time, the gas pump 26 is started to extract the external inert gas tank through the protective gas gas pipe 27, and transport it to the transfer gas tank 282, and finally blow it out through the nozzle head 64. The inert gas, that is, the protective gas, is blown between the laser welder 21 and the welding point for anti-oxidation protection. At this time, due to the rotation of the fixed frame 16, the nozzle head 64 moves in a circular trajectory to blow out protective gas in all directions of the laser welder 21 being welded, so as to provide a wider range of protection.

[0053] During the welding process, when the weld width needs to change, the blowing angle of the shielding gas needs to be adjusted. Therefore, the fourth cylinder 11 is started at this time. When the fourth cylinder 11 continues to move downward with the fixed plate 12 at the output end, the fixed frame 16 will be prompted to move downward with the laser welder 21. The laser welder 21 will continue to resist the welding seam and continue to press to force the laser welder 21 to press the lifting plate 18 upward, so that the lifting plate 18 will compress the first return spring 17 upward to facilitate subsequent reset. When the lifting plate 18 moves upward, it will move upward with the horizontal axis 23. At this time, the horizontal axis 23 moves upward and slides along the fourth slide groove 25. As it moves upward, the slider frame 24 is forced to rotate with the rotating shaft 281 along the rotating connection between the rotating shaft 281 and the fixed frame 31. The rotation of the slider frame 24 causes the angle between the nozzle 64 and the laser welder 21 to gradually decrease from the initial maximum angle, thereby achieving adaptation to the change in weld width.

[0054] Due to the rotation of the slider frame 24, the slider frame 24 will rotate synchronously with the first sleeve 28. When the first sleeve 28 rotates, it will rotate synchronously with the second sleeve 29 and the first protrusion 30, causing the first protrusion 30 to contact the second protrusion 32. The contact causes the first protrusion 30 to be forced to carry the second sleeve 29 to slide into the transfer air groove 282, and the second return spring 34 is continuously compressed during the sliding process to facilitate subsequent resetting. As the second sleeve 29 continuously enters the transfer air groove 282, the space in the transfer air groove 282 is The second sleeve 29 gradually blocks the connection between the intermediate gas groove 282 and the abutment block 37. Therefore, under the same outlet pressure, the inner contour of the vent groove 67 is reduced. At this time, the outlet pressure of the nozzle 64 increases, which makes the smaller the angle between the nozzle 64 and the laser welder 21, the greater the outlet pressure of the nozzle 64. This can prevent the nozzle 64 from blowing directly on the surface of the weldment when the angle between the nozzle 64 and the laser welder 21 becomes smaller, so that the air outlet of the nozzle 64 gradually tends to blow directly on the weldment surface, thereby preventing the shielding gas from weakening the airflow at the weld.

[0055] In order to further maintain the effect of protective gas when the angle of the jet head 64 is adjusted, according to the overall swing of the first sleeve 28, the notch position of the ventilation groove 67 is blocked by the second sleeve 29, and the degree of blocking of the ventilation groove 67 by the second sleeve 29 can be controlled by controlling the inclination angle of the first sleeve 28. In the process of the movement of the second sleeve 29, it will contact the first contact block 61, and the first contact block 61 is forced to move the slider 62 downward. In the next process, the third reset spring 68 is stretched to facilitate subsequent reset. As the slider 62 moves downward, the jet head 64 moves downward synchronously, causing the jet head 64 to extend downward, that is, while the gas volume is increased, the jet head 64 is also extended downward. The angle between the air head 64 and the laser welder 21 becomes larger, and the end of the air head 64 becomes longer so that it can be sprayed directly onto the weld surface. At this time, the downward movement of the air head 64 causes the blocking block 65 to slide along the inclined groove 66. Since the inclined groove 66 is an inclined groove, the angle between the two inclined grooves 66 becomes smaller as it moves downward. Therefore, at this time, as the air head 64 moves downward, the two blocking blocks 65 slide along the inclined groove 66, causing the two blocking blocks 65 to gradually slide closer to each other along the inside of the air head 64. While approaching, the two blocking blocks 65 will hinder the airflow passing through the inner wall of the air head 64, that is, the size of the air vent in the air head 64 is reduced, and the gas pressure ejected from the air head 64 is further increased.

[0056] When the first sleeve 28 rotates in the reverse direction to reset, the second sleeve 29 is prompted to gradually release the blockage of the notch position of the vent groove 67. At this time, the third reset spring 68 resets and moves the slider 62 upward, and the slider 62 moves upward with the jet head 64. As the jet head 64 moves upward, the blocking block 65 is prompted to slide upward along the inclined groove 66. It should be noted that the blocking block 65 slides in the inclined groove 66 and cannot be separated from the inclined groove 66. At this time, the two blocking blocks 65 move away from each other along the inner wall of the jet head 64, prompting the jet head The gas outlet area inside 64 increases, and the jet pressure of the jet head 64 decreases. That is, as the first sleeve 28 swings back to the initial direction, the angle between the jet head 64 and the laser welder 21 becomes smaller, and the jet of the jet head 64 can be blown toward the outer wall of the laser welder 21, and the protective gas is blown along the laser welder 21 to the weld being welded. At this time, the second sleeve 29 releases the blockage of the ventilation groove 67, prompting the jet head 64 to move up, and the jet of the jet head 64 is weakened; in this way, it can adapt to the different requirements of melting width and melting depth.

[0057] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0058] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A laser welding device, comprising a welding and splicing table (1), characterized in that: A support frame (2) is fixed to the outer wall of the welding splicing table (1), a first slide groove (7) is provided on the inner wall of the support frame (2), a slide frame (8) is slidably provided on the inner wall of the first slide groove (7), a second slide groove (9) is provided on the outer wall of the slide frame (8), a first slide block (6) is slidably provided on the inner wall of the second slide groove (9), a fourth cylinder (11) is installed on the outer wall of the first slide block (6), a fixing plate (12) is fixed to the output end of the fourth cylinder (11), a motor (13) is installed on the outer wall of the fixing plate (12), a first gear (14) is fixed to the output end of the motor (13), a second gear (15) is meshed with the outer wall of the first gear (14), and a fixing frame (16) is fixed to one end of the second gear (15); The inner wall of the fixed frame (16) is slidably provided with a lifting plate (18), the outer wall of the lifting plate (18) is fixed with a first return spring (17), and one end of the first return spring (17) is fixed to the inner wall of the fixed frame (16); The outer wall of the lifting plate (18) is provided with a through groove (22), the inner wall of the through groove (22) is fixed with a transverse axis (23), the outer wall of the transverse axis (23) is sleeved with a slider frame (24), the outer wall of the slider frame (24) is provided with a fourth slide groove (25), and the transverse axis (23) is slidably arranged on the inner wall of the fourth slide groove (25); the outer wall of the slider frame (24) is installed with an air pump (26); A first sleeve (28) is fixed to the output end of the air delivery pump (26); a second sleeve (29) is slidably disposed on the inner wall of the first sleeve (28); and a second return spring (34) is fixed to the outer wall of the second sleeve (29); A first protrusion (30) is fixed to the end of the second sleeve (29), a fixing frame (31) is fixed to the outer wall of the fixing frame (16), and a second protrusion (32) is fixed to the outer wall of the fixing frame (31); A rotating shaft (281) is rotatably provided on the outer wall of the fixing frame (31), and one end of the rotating shaft (281) is fixed to the outer wall of the first sleeve (28); A first inclined surface (282) is provided at the end of the second sleeve (29), a ventilation groove (67) is provided on the outer wall of the first sleeve (28), and a fixed circular frame (37) is fixed to the outer wall of the first sleeve (28).

2. A laser welding device according to claim 1, characterized in that: A protective gas delivery pipe (27) is fixed to the input end of the gas delivery pump (26), and one end of the second return spring (34) is fixed to the outer wall of the first sleeve (28).

3. A laser welding device according to claim 2, characterized in that: The ends of the first protrusion (30) and the second protrusion (32) are both configured as spherical surfaces; The outer wall of the fixing frame (31) is rotatably provided with a plurality of evenly distributed balls (33).

4. A laser welding device according to claim 3, characterized in that: The fixed circular frame (37) is communicated with the ventilation groove (67); a slider (62) is slidably provided on the inner wall of the fixed circular frame (37); a third return spring (68) is fixed to the outer wall of the slider (62); one end of the third return spring (68) is fixed to the outer wall of the first sleeve (28); an air outlet (63) is provided on the outer wall of the slider (62); and a first resistance block (61) is fixed to the inner wall of the air outlet (63).

5. A laser welding device according to claim 4, characterized in that: An air jet head (64) is fixed to the outer wall of the slide block (62), a blocking block (65) is slidably provided on the inner wall of the air jet head (64), an inclined groove (66) is provided on the inner wall of the fixed circular frame (37), and the blocking block (65) slides in the inclined groove (66).

6. A laser welding device according to claim 5, characterized in that: A second sliding block (19) is fixed to the outer wall of the lifting plate (18), a third sliding groove (20) is provided on the inner wall of the fixing frame (16), and the second sliding block (19) slides on the inner wall of the third sliding groove (20).

7. A laser welding device according to claim 6, characterized in that: Two first cylinders (3) are installed on the outer wall of the welding splicing table (1), and a sliding plate (4) is fixed to the output end of the first cylinder (3).

8. A laser welding device according to claim 7, characterized in that: A second cylinder (5) is mounted on the outer wall of the support frame (2), an output end of the second cylinder (5) is fixed to the outer wall of the sliding frame (8), a first sliding groove (7) is formed on the outer wall of the support frame (2), the sliding frame (8) slides on the inner wall of the first sliding groove (7), a third cylinder (10) is mounted on the outer wall of the sliding frame (8), an output end of the third cylinder (10) is fixed to the outer wall of the first sliding block (6); A laser welder (21) is installed on the inner wall of the lifting plate (18).

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