Laser welding device and laser welding method

Abstract

The present invention relates to the technical field of laser welding devices, and discloses a laser welding device and a laser welding method, including a welding table, a plurality of supporting legs are fixedly connected directly below the welding table, and the welding table includes a plurality of supporting platforms fixedly connected inside the welding table. The present invention sets a suction mechanism, starts the driving motor in the moving mechanism during welding, and the output end of the driving motor rotates to drive the output shaft to rotate, and the output shaft rotates to drive the gear to rotate. At this time, the gear is meshed with the rack. Such a setting is conducive to driving the laser head on the connecting frame to move and weld on the central axis of the welding table. At this time, the movement of the connecting frame drives the traction rope to move, and the movement of the traction rope drives the piston plate to slide along the inside of the vacuum chamber. When the vacuum chamber slides along the vacuum chamber, negative pressure is generated inside the vacuum chamber at the opposite sliding direction of the piston plate.

Description

Technical Field

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

[0002] Laser welding uses high-energy laser pulses to locally heat a small area of ​​the material. The energy of the laser radiation diffuses into the interior of the material through heat conduction, melting the material to form a specific molten pool. It is a new type of welding method. Laser welding is mainly used for welding thin-walled materials and precision parts. It can realize spot welding, butt welding, lap welding, sealing welding, etc. It has a high aspect ratio, a small weld width, a small heat-affected zone, small deformation, fast welding speed, smooth and beautiful welds, no post-welding treatment or only simple treatment, high weld quality, no pores, can be precisely controlled, small focusing spot, high positioning accuracy, easy to realize automation, and is one of the important aspects of the application of laser material processing technology.

[0003] Laser welding devices are prone to generate smoke during the welding process. The laser welding devices under the existing technology do not have a special mechanism to remove smoke during the welding process. Therefore, a large amount of smoke generated at the weld during the welding process will block the operator's observation line of sight, which is not conducive to the operator to adjust the device in time according to the quality of the weld, thereby affecting the quality of the weld. Summary of the invention

[0004] The object of the present invention is to provide a laser welding device and a laser welding method to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The present invention is a laser welding device and a laser welding method, comprising a welding table, a plurality of supporting legs are fixedly connected directly below the welding table, the welding table comprises a plurality of supporting platforms fixedly connected inside the welding table, a plurality of moving boxes are fixedly connected to the top of the welding table, a positioning groove is arranged inside the moving box, a connecting frame is slidably connected inside the positioning groove, both ends of the connecting frame are rotatably connected to positioning wheels, a laser head is fixedly connected directly below the connecting frame, and further comprising:

[0007] The clamping mechanism comprises a threaded rod rotatably connected to the welding table, one end of the threaded rod is fixedly connected to a handle, a plurality of pushing rods are rotatably connected to the threaded rod, and a plurality of tightening rods are rotatably connected to the pushing rod.

[0008] Furthermore, the clamping mechanism also includes a plurality of clamping plates arranged above the supporting platform, a plurality of sliding grooves are fixedly connected to one side of the clamping plate, a sliding block is slidably connected inside the sliding groove, one end of the sliding block away from the sliding groove is rotatably connected to the tightening rod, and an extrusion spring is arranged inside the sliding groove.

[0009] Furthermore, a plurality of descending mechanisms are provided at the bottom of the supporting platform, and the descending mechanisms include a yield groove opened on the supporting platform, a plurality of extrusion rods are fixedly connected to one end of the pushing rod close to the threaded rod, a plurality of sliding rods are fixedly connected to the bottom of the welding table, a plurality of sliding plates are slidably connected to the sliding rods, a plurality of lifting rods are rotatably connected directly above the sliding plates, an auxiliary sliding wheel is rotatably connected to one end of the lifting rod away from the sliding plate, a plurality of linkage rods are rotatably connected to one end of the extrusion rod away from the pushing rod, and an end of the linkage rod away from the extrusion rod is rotatably connected to the bottom of the sliding plate.

[0010] Furthermore, a moving mechanism is arranged directly above the connecting frame, a driving motor is fixedly connected directly above the connecting frame, an output shaft is fixedly connected to the output end of the driving motor, a rack is fixedly connected to the top of the moving box, a gear is fixedly connected to the end of the output shaft away from the driving motor, and the gear is meshed with the rack.

[0011] Furthermore, a suction mechanism is provided inside the mobile box, and the suction mechanism includes an air suction chamber opened inside the mobile box, a piston plate is slidably connected inside the air suction chamber, a plurality of traction ropes are fixedly connected to the piston plate, and one end of the traction rope away from the piston plate is fixedly connected to the connecting frame.

[0012] Furthermore, the suction mechanism also includes a plurality of one-way air intake valves fixedly connected to the piston plate, an end of the one-way air intake valve away from the piston plate is fixedly connected to an air suction pipe, the interior of the mobile box is fixedly connected to a fixed frame, a plurality of fixed pulleys are rotatably connected to the fixed frame, a traction rope is rotatably connected to the fixed pulley, the air suction pipe is rotatably connected to the fixed pulley, a plurality of suction boxes are fixedly connected directly below the connecting frame, and an end of the air suction pipe away from the one-way air intake valve is fixedly connected to the suction box.

[0013] Furthermore, an exhaust mechanism is provided inside the welding table, and the exhaust mechanism includes a plurality of one-way air outlet valves fixedly connected to the inside of the moving box, and a plurality of ventilation grooves are provided inside the welding table, and the ventilation grooves are connected to the one-way air outlet valves. The ventilation grooves extend to the inside of the supporting platform, and a plurality of exhaust holes are provided on the supporting platform, and the exhaust holes are connected to the ventilation grooves.

[0014] The laser welding method of the laser welding device comprises the following steps:

[0015] S1: Install the welding plate. First, slide the welding plate into the inside of the welding table through the auxiliary sliding wheel. Turn the handle to make the push rod on the threaded rod slide toward each other along the groove on the welding table, and push the clamping plate to clamp the two welding plates.

[0016] S2: The lowering pulley, the push rod drives the linkage rod in the lowering mechanism to push the sliding piece to slide to both ends of the sliding rod, and the sliding piece drives the auxiliary sliding wheel above the lifting rod to descend. The auxiliary sliding wheel descends and drives the welding plate on the auxiliary sliding wheel to fall on the supporting platform, so that the supporting area at the bottom of the welding plate is increased;

[0017] S3: To remove smoke and dust, the moving mechanism moves to drive the connecting frame to move, and the connecting frame moves to drive the piston sheet in the suction mechanism to slide along the inside of the suction chamber, so that negative pressure is generated inside the suction chamber, and then the negative pressure is transmitted to the inside of the suction box through the suction pipe, and the suction box generates negative pressure, and smoke and dust are sucked into the suction box through the small holes;

[0018] S4: The weld is cooled down. The piston moves to squeeze the gas inside the vacuum chamber through the one-way air outlet valve and the ventilation groove. The gas is discharged from the exhaust hole and blown around the weld, accelerating the air flow around the weld, which is conducive to rapid cooling of the weld.

[0019] The present invention has the following beneficial effects:

[0020] (1) The present invention sets a suction mechanism. When welding, the driving motor in the moving mechanism is started. The output end of the driving motor rotates to drive the output shaft to rotate. The output shaft rotates to drive the gear to rotate. At this time, the gear is meshed with the rack. This arrangement is conducive to driving the laser head on the connecting frame to move on the central axis of the welding table for welding. At this time, the movement of the connecting frame drives the traction rope to move. The movement of the traction rope drives the piston plate to slide along the inside of the exhaust chamber. When the piston plate slides along the exhaust chamber, negative pressure is generated in the exhaust chamber at the opposite sliding direction of the piston plate. The negative pressure generated in the exhaust chamber will be transmitted to the inside of the suction box at the other end of the exhaust pipe through the one-way air inlet valve. The suction box sucks the smoke generated during the welding process into the suction box through a small hole on one side, thereby avoiding the generation of a large amount of smoke during the welding process, which affects the operator's observation of the weld, and the operator can make timely adjustments to the device.

[0021] (2) In the present invention, when the welding device is used, the welding plate to be welded is first slid to the inside of the welding table through the auxiliary sliding wheel, and the handle is turned to make the pushing rod on the threaded rod slide toward each other along the groove on the welding table. The movement of the pushing rod drives the clamping plate at one end of the tightening rod to move. At this time, the two clamping plates contact the welding plate and push the welding plate to the central axis of the welding table. When the two welding plates are squeezed, the tightening rod pushes the sliding block along the sliding groove to squeeze the squeezing spring. This arrangement is conducive to the clamping and fixing of the welding plate by the clamping mechanism. By setting a plurality of tightening rods to squeeze the clamping plates, this arrangement is conducive to avoiding direct contact of the pushing rod with the welding plate. Direct contact with the welding plate will cause rigid squeezing of the pushing rod and the welding plate. Since laser welding is suitable for welding of thin plates, the welding plate is easily deformed under rigid squeezing. However, the flexible squeezing between the clamping plate and the welding plate can control the squeezing force of the clamping plate according to the elastic force of the squeezing spring, so that the welding plate can be fixed during the welding process, thereby ensuring the welding stability of the device.

[0022] (3) The present invention provides a descending mechanism, wherein the movement of the push rod drives the squeezing rod in the descending mechanism to move toward the central axis of the welding table. The movement of the squeezing rod drives the sliding sheet at one end of the linkage rod to slide along the sliding sheet toward both ends of the sliding sheet. The sliding sheet interacts with the auxiliary sliding wheel at one end of the lifting rod to lower its height, so that the auxiliary sliding wheel descends to a position below the clearance groove. The auxiliary sliding wheel descends and drives the welding plate above the auxiliary sliding wheel to fall on the supporting platform. This increases the bottom supporting area of ​​the welding plate. On the one hand, it is beneficial for the welding plate to detach from the auxiliary sliding wheel and prevent the welding plate from sliding on the auxiliary sliding wheel. On the other hand, the welding plate falls on the supporting platform, which increases the bottom supporting area of ​​the welding plate, which is beneficial for improving the stability of the welding plate.

[0023] (4) In the present invention, an exhaust mechanism is provided, and the movement of the traction rope drives the piston plate to slide along the inside of the exhaust chamber. When the piston plate slides along the exhaust chamber, a negative pressure is generated inside the exhaust chamber at the opposite end of the piston plate sliding direction. At this time, the gas inside the exhaust chamber along the sliding direction of the piston plate is squeezed. At this time, the gas inside the exhaust chamber is discharged through the one-way air outlet valve, and the gas inside the exhaust chamber is transported to the small hole of the exhaust hole through the ventilation groove for discharge. Such a setting is conducive to accelerating the discharge of gas from the exhaust hole and blowing it around the weld, accelerating the air flow around the weld, and facilitating the rapid cooling of the weld, thereby accelerating the solidification of the welding molten pool and accelerating the formation of the weld.

[0024] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the partial structure of the clamping mechanism of the present invention;

[0028] Figure 3 It is a schematic diagram of the structure of the descending mechanism of the present invention;

[0029] Figure 4 For the present invention Figure 3 A magnified view of middle;

[0030] Figure 5 It is a schematic diagram of the local structure of the descending mechanism of the present invention;

[0031] Figure 6 It is a schematic diagram of a partial cross-sectional structure of the present invention;

[0032] Figure 7 It is a schematic diagram of the partial structure of the suction mechanism of the present invention;

[0033] Figure 8 For the present invention Figure 7 Enlarged view of middle B;

[0034] Fig. 9 For the present invention Figure 7 Enlarged view of middle C;

[0035] Fig.10 It is a schematic cross-sectional view of the exhaust mechanism of the present invention;

[0036] Fig.11 For the present invention Fig.10 Enlarged view of middle D;

[0037] Fig.12 The figure is a flow chart of the welding method of the present invention.

[0038] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0039] In the figure: 1, welding table; 11, supporting leg; 12, supporting platform; 13, moving box; 14, positioning groove; 15, positioning wheel; 16, connecting frame; 17, laser head; 2, clamping mechanism; 201, handle; 202, threaded rod; 203, push rod; 204, tightening rod; 205, clamping plate; 206, sliding groove; 207, sliding block; 208, squeezing spring; 3, descending mechanism; 301, giving way groove; 302, squeezing rod; 303, sliding rod; 304, sliding sheet; 3 05. Lifting rod; 306. Auxiliary sliding wheel; 307. Linkage rod; 4. Moving mechanism; 401. Driving motor; 402. Output shaft; 403. Rack; 404. Gear; 5. Suction mechanism; 501. Air suction chamber; 502. Piston plate; 503. Traction rope; 504. One-way air inlet valve; 505. Air suction pipe; 506. Fixed frame; 507. Fixed pulley; 508. Suction box; 6. Exhaust mechanism; 601. One-way air outlet valve; 602. Vent groove; 603. Exhaust hole. DETAILED DESCRIPTION

[0040] 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.

[0041] Example 1, please refer to Figure 1-Figure 6 As shown, the present invention is a laser welding device and a laser welding method, comprising a welding table 1, a plurality of support legs 11 are fixedly connected directly below the welding table 1, the welding table 1 comprises a plurality of support platforms 12 fixedly connected inside the welding table 1, a plurality of moving boxes 13 are fixedly connected to the top of the welding table 1, a positioning groove 14 is arranged inside the moving box 13, a connecting frame 16 is slidably connected inside the positioning groove 14, both ends of the connecting frame 16 are rotatably connected to positioning wheels 15, a laser head 17 is fixedly connected directly below the connecting frame 16, and further comprising:

[0042] The clamping mechanism 2 has a threaded rod 202 rotatably connected to the welding table 1, one end of the threaded rod 202 is fixedly connected to a handle 201, the threaded rod 202 is rotatably connected to a plurality of push rods 203, and the push rod 203 is rotatably connected to a plurality of tightening rods 204.

[0043] The clamping mechanism 2 also includes a plurality of clamping plates 205 arranged above the supporting platform 12, and a plurality of sliding grooves 206 are fixedly connected to one side of the clamping plate 205, and a sliding block 207 is slidably connected inside the sliding groove 206, and the end of the sliding block 207 away from the sliding groove 206 is rotatably connected to the tightening rod 204, and an extrusion spring 208 is arranged inside the sliding groove 206. The function of this component is that when the welding device is used, the welding plate to be welded is first transported to the inside of the welding table 1, and the handle 201 is turned to make the pushing rod 203 on the threaded rod 202 slide toward each other along the groove on the welding table 1. The movement of the pushing rod 203 drives the clamping plate 205 at one end of the tightening rod 204 to move. At this time, the two clamping plates 205 contact the welding plate and push the welding plate toward the central axis of the welding table 1. When the two welding plates are squeezed, the tightening rod 204 pushes the sliding block 207 along the sliding groove 206 to squeeze the squeezing spring 208. This arrangement is beneficial to the clamping and fixing of the welding plate by the clamping mechanism 2. By setting a plurality of tightening rods 204 to squeeze the clamping plate 205, this arrangement is beneficial to avoiding direct contact of the pushing rod 203 with the welding plate. Direct contact with the welding plate will cause rigid squeezing of the pushing rod 203 and the welding plate. Since laser welding is suitable for welding of thin plates, the welding plate is prone to deformation under rigid squeezing. However, the flexible squeezing between the clamping plate 205 and the welding plate can control the squeezing force of the clamping plate 205 according to the elastic force of the squeezing spring 208, so that the welding plate can be fixed during the welding process, thereby ensuring the welding stability of the device.

[0044] The bottom of the support platform 12 is provided with a plurality of descending mechanisms 3, the descending mechanisms 3 include a yielding groove 301 opened on the support platform 12, a plurality of extrusion rods 302 are fixedly connected to one end of the push rod 203 close to the threaded rod 202, a plurality of sliding rods 303 are fixedly connected to the bottom of the welding platform 1, a plurality of sliding sheets 304 are slidably connected to the sliding rods 303, a plurality of lifting rods 305 are rotatably connected just above the sliding sheets 304, an end of the lifting rods 305 away from the sliding sheets 304 is rotatably connected to an auxiliary sliding wheel 306, an end of the extrusion rod 302 away from the push rod 203 is rotatably connected to a plurality of linkage rods 307, an end of the linkage rod 307 away from the extrusion rod 302 is rotatably connected to the bottom of the sliding sheet 304, and the function of this component is to push the rod 203 to move by setting the descending mechanism 3. The extrusion rod 302 in the descending mechanism 3 is driven to move toward the central axis of the welding table 1. The movement of the extrusion rod 302 drives the sliding piece 304 at one end of the linkage rod 307 to slide along the sliding rod 303 toward the two ends of the sliding rod 303. The sliding piece 304 interacts with the auxiliary sliding wheel 306 at one end of the lifting rod 305 to descend in height, so that the auxiliary sliding wheel 306 descends to a position below the give way groove 301. The auxiliary sliding wheel 306 descends and drives the welding plate above the auxiliary sliding wheel 306 to fall on the supporting platform 12. This increases the bottom supporting surface of the welding plate. On the one hand, it is beneficial for the welding plate to detach from the auxiliary sliding wheel 306 and prevent the welding plate from sliding on the auxiliary sliding wheel 306. On the other hand, the welding plate falls on the supporting platform 12, which increases the bottom supporting area of ​​the welding plate, which is beneficial to improve the stability of the welding plate.

[0045] A moving mechanism 4 is arranged directly above the connecting frame 16, and a driving motor 401 is fixedly connected directly above the connecting frame 16. An output shaft 402 is fixedly connected to the output end of the driving motor 401, and a rack 403 is fixedly connected to the top of the moving box 13. A gear 404 is fixedly connected to the end of the output shaft 402 away from the driving motor 401, and the gear 404 is meshed with the rack 403. The function of this component is to start the driving motor 401 in the moving mechanism 4 during welding. The output end of the driving motor 401 rotates to drive the output shaft 402 to rotate, and the output shaft 402 rotates to drive the gear 404 to rotate. At this time, the gear 404 is meshed with the rack 403. This arrangement is conducive to driving the laser head 17 on the connecting frame 16 to move on the central axis of the welding table 1 for welding.

[0046] Embodiment 2 is different from Embodiment 1 in that: Figure 1-Figure 12 As shown, a suction mechanism 5 is provided inside the mobile box 13, and the suction mechanism 5 includes an air suction chamber 501 opened inside the mobile box 13, and a piston plate 502 is slidably connected inside the air suction chamber 501. A plurality of traction ropes 503 are fixedly connected to the piston plate 502, and one end of the traction rope 503 away from the piston plate 502 is fixedly connected to the connecting frame 16.

[0047] The suction mechanism 5 also includes a plurality of one-way air intake valves 504 fixedly connected to the piston plate 502, and an end of the one-way air intake valve 504 away from the piston plate 502 is fixedly connected to an air extraction pipe 505, and a fixed frame 506 is fixedly connected to the inside of the mobile box 13, and a plurality of fixed pulleys 507 are rotatably connected to the fixed frame 506, and the traction rope 503 is rotatably connected to the fixed pulley 507, and the air extraction pipe 505 is rotatably connected to the fixed pulley 507, and a plurality of suction boxes 508 are fixedly connected directly below the connecting frame 16, and an end of the air extraction pipe 505 away from the one-way air intake valve 504 is fixedly connected to the suction box 508, and the function of this component is to drive the traction when the connecting frame 16 moves. The rope 503 moves, and the movement of the traction rope 503 drives the piston plate 502 to slide along the inside of the vacuum chamber 501. When the piston plate 502 slides along the vacuum chamber 501, negative pressure is generated in the vacuum chamber 501 at the end opposite to the sliding direction of the piston plate 502. The negative pressure generated in the vacuum chamber 501 will be transmitted to the inside of the suction box 508 at the other end of the vacuum pipe 505 through the one-way air inlet valve 504. The suction box 508 sucks the smoke generated during welding into the suction box 508 through a small hole on one side, so as to avoid a large amount of smoke generated during welding, which affects the operator's observation of the weld, and enables the operator to make timely adjustments to the device.

[0048] The welding table 1 is provided with an exhaust mechanism 6 inside, and the exhaust mechanism 6 includes a plurality of one-way air outlet valves 601 fixedly connected to the inside of the moving box 13. The welding table 1 is provided with a plurality of ventilation grooves 602 inside, and the ventilation grooves 602 are connected with the one-way air outlet valves 601. The ventilation grooves 602 extend to the inside of the supporting platform 12, and a plurality of exhaust holes 603 are provided on the supporting platform 12, and the exhaust holes 603 are connected with the ventilation grooves 602. The function of this component is to set the exhaust mechanism 6, and the traction rope 503 moves to drive the piston plate 502 to slide along the inside of the air pumping chamber 501. When the piston plate 502 moves along the pumping chamber 501, the piston plate 502 is moved. When the air cavity 501 slides, negative pressure is generated inside the air suction cavity 501 at the end opposite to the sliding direction of the piston plate 502. At this time, the gas inside the air suction cavity 501 along the sliding direction of the piston plate 502 is squeezed. At this time, the gas inside the air suction cavity 501 is discharged through the one-way air outlet valve 601, and the gas inside the air suction cavity 501 is transported to the small hole of the exhaust hole 603 through the ventilation groove 602 for discharge. This arrangement is conducive to accelerating the discharge of gas from the exhaust hole 603 and blowing it around the weld, accelerating the air flow around the weld, and facilitating the rapid cooling of the weld, thereby accelerating the solidification of the welding molten pool and accelerating the formation of the weld.

[0049] The laser welding method of the laser welding device comprises the following steps:

[0050] S1: Install the welding plate. First, slide the welding plate into the inside of the welding table 1 through the auxiliary sliding wheel 306, turn the handle 201 to make the push rod 203 on the threaded rod 202 slide toward each other along the groove on the welding table 1, and push the clamping plate 205 to clamp the two welding plates;

[0051] S2: The pulley is lowered. The push rod 203 drives the linkage rod 307 in the lowering mechanism 3 to push the sliding piece 304 to slide toward both ends of the sliding rod 303. The sliding piece 304 drives the auxiliary sliding wheel 306 above the lifting rod 305 to descend. The auxiliary sliding wheel 306 descends and drives the welding plate on the auxiliary sliding wheel 306 to fall onto the supporting platform 12, so that the supporting area at the bottom of the welding plate is increased.

[0052] S3: To remove smoke and dust, the moving mechanism 4 moves to drive the connecting frame 16 to move, and the connecting frame 16 moves to drive the piston plate 502 in the suction mechanism 5 to slide along the inside of the suction chamber 501, so that negative pressure is generated inside the suction chamber 501, and then the negative pressure is transmitted to the inside of the suction box 508 through the suction pipe 505, and the suction box 508 generates negative pressure, and the smoke and dust are sucked into the suction box 508 through the small holes;

[0053] S4: The weld is cooled down. The piston plate 502 moves to squeeze the gas inside the vacuum chamber 501 through the one-way air outlet valve 601 and the ventilation groove 602. The gas is discharged from the exhaust hole 603 and blown around the weld, accelerating the air flow around the weld, which is conducive to rapid cooling of the weld.

[0054] A specific application of this embodiment is:

[0055] When using the welding device, first slide the welding plate to be welded into the interior of the welding table 1 through the auxiliary sliding wheel 306, turn the handle 201 to make the pushing rod 203 on the threaded rod 202 slide toward each other along the groove on the welding table 1, and the pushing rod 203 moves to drive the clamping plate 205 at one end of the tightening rod 204 to move. At this time, the two clamping plates 205 contact the welding plate and push the welding plate to the central axis of the welding table 1. When the two welding plates are squeezed, the tightening rod 204 pushes the sliding block 207 to squeeze the squeezing spring 208 along the sliding groove 206. This arrangement is conducive to the clamping and fixing of the welding plate by the clamping mechanism 2. By setting a plurality of tightening rods 204 to squeeze the clamping plate 205, this arrangement is conducive to avoiding direct contact between the pushing rod 203 and the welding plate. Direct contact with the welding plate will cause rigid squeezing between the pushing rod 203 and the welding plate. Since laser welding is suitable for welding of thin plates, the welding plate is easily deformed under rigid squeezing. However, the flexible squeezing between the clamping plate 205 and the welding plate can be adjusted according to the squeezing The elastic force of the spring 208 is used to control the squeezing force of the clamping plate 205, so that the welding plate can be fixed during the welding process, thereby ensuring the welding stability of the device; by setting the descending mechanism 3, the push rod 203 moves to drive the squeezing rod 302 in the descending mechanism 3 to move toward the central axis of the welding platform 1, and the squeezing rod 302 moves to drive the sliding piece 304 at one end of the linkage rod 307 to slide along the sliding rod 303 to both ends of the sliding rod 303, and the sliding piece 304 interacts to drive the auxiliary sliding wheel 306 at one end of the lifting rod 305 to decrease in height, so that the auxiliary sliding wheel 306 decreases to a position below the give way groove 301, and the auxiliary sliding wheel 306 decreases and drives the welding plate above the auxiliary sliding wheel 306 to fall on the supporting platform 12, so that the bottom supporting surface of the welding plate is increased, which is conducive to making the welding plate detach from the auxiliary sliding wheel 306 on the one hand, and preventing the welding plate from sliding on the auxiliary sliding wheel 306, and on the other hand, the welding plate falls on the supporting platform 12, so that the bottom supporting area of ​​the welding plate is increased, which is conducive to improving the stability of the welding plate;

[0056] By setting the suction mechanism 5, the driving motor 401 in the moving mechanism 4 is started during welding, and the output end of the driving motor 401 rotates to drive the output shaft 402 to rotate, and the output shaft 402 rotates to drive the gear 404 to rotate. At this time, the gear 404 is meshed with the rack 403. This arrangement is conducive to driving the laser head 17 on the connecting frame 16 to move on the central axis of the welding table 1 for welding. At this time, the movement of the connecting frame 16 drives the traction rope 503 to move, and the movement of the traction rope 503 drives the piston plate 502 to slide along the inside of the exhaust chamber 501. When the piston plate 502 slides along the exhaust chamber 501, a negative pressure is generated inside the exhaust chamber 501 at the end opposite to the sliding direction of the piston plate 502. The negative pressure generated in the exhaust chamber 501 will be transported to the inside of the suction box 508 at the other end of the exhaust pipe 505 through the one-way air inlet valve 504. The suction box 508 removes the smoke generated during welding through a small hole on one side. Dust is sucked into the suction box 508, so as to avoid a large amount of smoke and dust during welding, which would affect the operator's observation of the weld, and the operator can make timely adjustments to the device; by setting the exhaust mechanism 6, the traction rope 503 moves and drives the piston plate 502 to slide along the inside of the exhaust chamber 501. When the piston plate 502 slides along the exhaust chamber 501, a negative pressure is generated inside the exhaust chamber 501 at the end opposite to the sliding direction of the piston plate 502. At this time, the gas inside the exhaust chamber 501 along the sliding direction of the piston plate 502 is squeezed. At this time, the gas inside the exhaust chamber 501 is discharged through the one-way air outlet valve 601, and the gas inside the exhaust chamber 501 is transported to the small hole of the exhaust hole 603 through the ventilation groove 602 for discharge. Such a setting is conducive to accelerating the discharge of gas from the exhaust hole 603 and blowing it around the weld, accelerating the air flow around the weld, and facilitating the rapid cooling of the weld, thereby accelerating the solidification of the welding molten pool and accelerating the formation of the weld.

[0057] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A laser welding device, comprising a welding table (1), wherein a plurality of support legs (11) are fixedly connected directly below the welding table (1), the welding table (1) comprises a plurality of support platforms (12) fixedly connected inside the welding table (1), a plurality of moving boxes (13) are fixedly connected to the top of the welding table (1), a positioning groove (14) is provided inside the moving box (13), a connecting frame (16) is slidably connected inside the positioning groove (14), both ends of the connecting frame (16) are rotatably connected to positioning wheels (15), a laser head (17) is fixedly connected directly below the connecting frame (16), and the device is characterized in that: Also includes: A clamping mechanism (2), wherein a threaded rod (202) is rotatably connected to the welding table (1), one end of the threaded rod (202) is fixedly connected to a handle (201), a plurality of push rods (203) are rotatably connected to the threaded rod (202), and a plurality of tightening rods (204) are rotatably connected to the push rod (203); The clamping mechanism (2) further comprises a plurality of clamping plates (205) arranged above the supporting platform (12), a plurality of sliding grooves (206) being fixedly connected to one side of the clamping plates (205), a sliding block (207) being slidably connected inside the sliding groove (206), an end of the sliding block (207) away from the sliding groove (206) being rotatably connected to the tightening rod (204), and a compression spring (208) being arranged inside the sliding groove (206); A plurality of descending mechanisms (3) are arranged at the bottom of the support platform (12), the descending mechanisms (3) comprising a clearance groove (301) provided on the support platform (12), one end of the push rod (203) close to the threaded rod (202) is fixedly connected to a plurality of extrusion rods (302), the bottom of the welding platform (1) is fixedly connected to a plurality of sliding rods (303), a plurality of sliding sheets (304) are slidably connected to the sliding rods (303), a plurality of lifting rods (305) are rotatably connected directly above the sliding sheets (304), one end of the lifting rod (305) away from the sliding sheets (304) is rotatably connected to an auxiliary sliding wheel (306), one end of the extrusion rod (302) away from the push rod (203) is rotatably connected to a plurality of linkage rods (307), and one end of the linkage rod (307) away from the extrusion rod (302) is rotatably connected to the bottom of the sliding sheet (304); A suction mechanism (5) is provided inside the movable box (13), the suction mechanism (5) comprising an air suction chamber (501) opened inside the movable box (13), a piston plate (502) being slidably connected inside the air suction chamber (501), a plurality of traction ropes (503) being fixedly connected to the piston plate (502), and an end of the traction rope (503) away from the piston plate (502) being fixedly connected to the connecting frame (16); The suction mechanism (5) further comprises a plurality of one-way air intake valves (504) fixedly connected to the piston plate (502); one end of the one-way air intake valve (504) away from the piston plate (502) is fixedly connected to an air extraction pipe (505); a fixed frame (506) is fixedly connected to the interior of the movable box (13); a plurality of fixed pulleys (507) are rotatably connected to the fixed frame (506); the traction rope (503) is rotatably connected to the fixed pulley (507); the air extraction pipe (505) is rotatably connected to the fixed pulley (507); a plurality of suction boxes (508) are fixedly connected directly below the connecting frame (16); one end of the air extraction pipe (505) away from the one-way air intake valve (504) is fixedly connected to the suction box (508).

2. A laser welding device according to claim 1, characterized in that: A moving mechanism (4) is arranged directly above the connecting frame (16); a driving motor (401) is fixedly connected directly above the connecting frame (16); an output shaft (402) is fixedly connected to the output end of the driving motor (401); a rack (403) is fixedly connected to the top of the moving box (13); a gear (404) is fixedly connected to one end of the output shaft (402) away from the driving motor (401); and the gear (404) is meshed with the rack (403).

3. A laser welding device according to claim 2, characterized in that: An exhaust mechanism (6) is provided inside the welding table (1), the exhaust mechanism (6) comprising a plurality of one-way air outlet valves (601) fixedly connected to the inside of the moving box (13), a plurality of ventilation grooves (602) are provided inside the welding table (1), the ventilation grooves (602) are connected to the one-way air outlet valves (601), the ventilation grooves (602) extend to the inside of the supporting platform (12), the supporting platform (12) is provided with a plurality of exhaust holes (603), the exhaust holes (603) are connected to the ventilation grooves (602).

4. A laser welding method using a laser welding device, using the laser welding device as claimed in claim 3, characterized in that: It includes the following steps: S1: Installing the welding plate, firstly slide the welding plate into the interior of the welding table (1) via the auxiliary sliding wheel (306), turn the handle (201) to make the push rod (203) on the threaded rod (202) slide towards each other along the groove on the welding table (1), and push the clamping plate (205) to clamp the two welding plates; S2: lowering the pulley, the push rod (203) drives the linkage rod (307) in the descending mechanism (3) to push the sliding plate (304) to slide toward the two ends of the sliding rod (303), the sliding plate (304) drives the auxiliary sliding wheel (306) above the lifting rod (305) to descend, and the auxiliary sliding wheel (306) descends to drive the welding plate on the auxiliary sliding wheel (306) to fall onto the supporting platform (12), so that the supporting area at the bottom of the welding plate is increased; S3: To remove smoke and dust, the moving mechanism (4) moves to drive the connecting frame (16) to move, and the connecting frame (16) moves to drive the piston plate (502) in the suction mechanism (5) to slide along the inside of the suction chamber (501), so that negative pressure is generated inside the suction chamber (501), and then the negative pressure is transmitted to the inside of the suction box (508) through the suction pipe (505), and the suction box (508) generates negative pressure, and smoke and dust are sucked into the inside of the suction box (508) through the small holes; S4: The weld is cooled. The piston plate (502) moves to squeeze the gas inside the exhaust chamber (501) through the one-way exhaust valve (601) and the ventilation groove (602). The gas is discharged from the exhaust hole (603) and blown around the weld, thereby accelerating the air flow around the weld and facilitating rapid cooling of the weld.

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