A laser welding device for gas generators

Abstract

The application discloses a kind of gas generator laser welding device, belong to gas generator welding technical field, including bottom plate, the bottom plate one side is equipped with support plate, the bottom plate one side is equipped with welding module;In the application, by setting down pressure subassembly, by the design, when the shell and upper cover of gas generator are welded, down pressure is carried out from the top end of upper cover by pressing plate, ensure that the joint between upper cover and shell can be closely fitted, avoid affecting the welding quality due to loosening, at the same time, the extrusion and tension of upper cover circumferential surface and chamfer are carried out by pressure block and fixing belt respectively, the multidirectional synchronous fixation of upper cover is realized, the tightness of connection between upper cover and shell is further ensured, and the circumferential setting of pressure block can also avoid the sliding of upper cover on horizontal plane during welding, to ensure the accurate alignment between upper cover and shell, and then guarantee the quality of welding.

Description

Technical Field

[0001] This invention belongs to the field of gas generator welding technology, and particularly relates to a gas generator laser welding device. Background Technology

[0002] The gas generator is the core component of a car's airbag system. When a car is involved in a collision, the gas generator can quickly inflate the airbag to protect the occupants. The gas generator usually consists of two parts: a housing and a cover. The two parts need to be sealed together by welding. Nowadays, ultrasonic welding or laser welding is generally used to weld the cover and housing of the gas generator.

[0003] When welding the top cover and the shell with a laser, the shell and the top cover of the gas generator are generally thin-walled rotating structures. Under the combined effects of uneven clamping force and high welding temperature, they are prone to deformation or displacement. At the same time, existing welding equipment usually only has a jet pipe on one side of the welding torch, which makes it difficult for the shielding gas to evenly cover the entire annular weld area, thus affecting the welding effect. Summary of the Invention

[0004] The purpose of this invention is to provide a gas generator laser welding device to solve the problem that the shell and the top cover are prone to misalignment during the welding process due to uneven clamping force.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a gas generator laser welding device, comprising a base plate, a support plate mounted on one side of the base plate, a welding module provided on one side of the base plate, and further comprising: The clamping assembly includes a support plate disposed above the base plate, and a flexible plate is provided at the edge of the support plate, and multiple flexible plates are arranged circumferentially to clamp and fix the outer circular surface of the outer shell. The pressing assembly includes a pressure plate disposed above the base plate, and multiple pressure blocks are arranged around the outer circumference of the pressure plate. The pressure plate and the pressure blocks are used to press and fix the top of the upper cover. An airflow assembly includes a nozzle holder disposed above a flexible plate, with nozzles mounted on one side of the nozzle holder, and multiple nozzles arranged circumferentially on both the nozzle holder and the nozzles, which spray gas to protect the welded area.

[0006] As a further description of the above technical solution: The pressing assembly further includes: a first electric push rod, which is installed on the top surface of the support plate, and the telescopic end of the first electric push rod is connected to a connecting frame through the support plate; The mounting plate is located below the connecting frame. A bearing seat is mounted on the top surface of the mounting plate. The top surface of the bearing seat is fixedly connected to the connecting frame. The mounting plate is moved by a first electric push rod. A sliding rod is installed on the top surface of the pressure plate and is slidably connected to the mounting plate through an internal through hole. A first spring is sleeved on the outer wall of the sliding rod, and the two ends of the first spring are fixedly connected to the mounting plate and the pressure plate respectively. The movement of the mounting plate drives the pressure plate to squeeze the upper cover.

[0007] As a further description of the above technical solution: The pressing component further includes: a first swing seat, which is rotatably mounted at the edge notch of the mounting plate, and multiple first swing seats are arranged circumferentially, with a lever mounted on the top of the first swing seat; The pressure rod is slidably mounted on one side of the first swing seat, and one end of the pressure rod is hinged to the pressure block. The pressure rod pushes the pressure block to press and fix the outer wall of the upper cover by rotating the first swing seat. The plug-in base is inserted into the through holes on both sides of the first swing base, and the pressure rod has through holes on both sides corresponding to the plug-in base. Multiple through holes are arranged linearly. The plug-in base is connected to the through holes at different positions inside the pressure rod to adjust the extension length of the pressure rod.

[0008] As a further description of the above technical solution: The pressing assembly further includes: a fixing frame, which is installed on the top surface of the pressure plate and has multiple fixing frames arranged circumferentially. The fixing frame is slidably connected to the mounting plate through a through hole inside the mounting plate, and one end of the fixing frame is slidably connected to the lever through a sliding groove inside the lever. As the pressure plate and the mounting plate move relative to each other, the fixing frame moves the lever and the first swing seat to rotate, thereby driving the pressure block to squeeze. The fixing strap has one end installed in the groove on the bottom surface of the pressure plate, and multiple fixing straps are arranged circumferentially. The other end of the fixing strap is equipped with a connecting block, and the connecting block is engaged with the pressure block through a groove on one side of the pressure block. The movement of the pressure block is used to pull the fixing strap to squeeze the top cover.

[0009] As a further description of the above technical solution: The airflow assembly further includes: a protective shell, which is disposed on the outside of the nozzle seat, and multiple protective shells are arranged circumferentially, and the protective shells are arc-shaped, forming a protective ring through the circumferentially arranged protective shells; The first guide strip is installed on the inner wall of the protective shell. The first guide strip is an inclined arc-shaped strip, and multiple first guide strips are evenly arranged to guide particulate impurities. A screening plate is installed on one side of the bottom of the protective shell, and a receiving box is installed at the bottom of the screening plate. Particle impurities are guided through the screening plate by the first guide bar and collected by the receiving box. An air guide plate is provided inside the protective shell, and multiple air guide plates are evenly arranged. A fixing rod is installed at the bottom of the air guide plate, and the fixing rod is rotatably connected to the screening plate and the receiving box through the through holes inside the screening plate and the receiving box. The air guide plate guides the airflow to blow towards the weld.

[0010] As a further description of the above technical solution: The airflow assembly further includes: a second guide bar, which is installed on one side of the air guide plate, and multiple second guide bars are evenly arranged to guide particulate impurities; The gear is mounted on the bottom end of the fixed rod, and a rack meshes with one side of the gear. A connecting seat is mounted on one side of the rack. The rack drives the gear to rotate in order to adjust the direction of the air guide plate. The second electric push rod has one end rotatably mounted on the shaft at the bottom of the protective shell, and the telescopic end of the second electric push rod is hinged to the connecting seat. The extension and retraction of the second electric push rod drives the rack to move, thereby adjusting the direction of the air guide plate.

[0011] As a further description of the above technical solution: The airflow assembly further includes a fixing plate, which is installed on the pipe that passes through the protective shell at the top of the nozzle seat, and the angle of the nozzle seat can be adjusted by rotating the fixing plate; The plug rod is inserted into the through hole inside the fixed plate, and the plug rod is inserted into the protective shell through the groove at the top of the protective shell. The plug rod is used to limit the position of the nozzle seat by inserting into the fixed plate. An upright plate is provided below the protective shell, and a bolt is provided at the top of the upright plate to fix the upright plate to the hinge seat at the bottom of the protective shell.

[0012] As a further description of the above technical solution: The clamping assembly further includes: a limiting rod, which is installed on the bottom surface of the support plate, and a second spring is installed at the bottom end of the limiting rod; A rotating platform is installed on the top surface of the base plate, and the top surface of the rotating platform is provided with a groove corresponding to the limiting rod. The bottom end of the second spring is fixedly connected to the rotating platform, and the rotating platform drives the support plate and the outer shell to rotate. A support base is installed on the outer wall of the rotary table, and multiple support bases are arranged around the circumference of the support base. A swing rod is hinged to the top of the support base.

[0013] As a further description of the above technical solution: The clamping assembly further includes: a second swing seat, one side of which is hinged to the top of the swing rod; The fixed seat is installed on the top surface of the support plate, and multiple fixed seats are arranged around the circumference. The top of the fixed seat is hinged to the bottom of the second swing seat. The second swing seat is driven to swing by the fixed seat through the downward movement of the support plate. An elastic plate is installed on one side of a flexible plate, and the other side of the elastic plate is fixedly connected to a second swing seat. The movement of the second swing seat pushes the elastic plate into contact with the flexible plate and the outer wall of the outer shell.

[0014] As a further description of the above technical solution: The clamping assembly further includes a limiting block, which is installed on one side of the flexible plate; A push rod is installed on both sides of the second swing seat, with the other end of the push rod corresponding to the limiting block. The swing of the second swing seat drives the push rod to squeeze the limiting block.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: In this invention, by setting up a pressing component, a pressure plate is used to press down from the top of the top cover during the welding of the gas generator's outer shell and the top cover. This ensures a tight fit between the top cover and the outer shell, preventing loosening from affecting the welding quality. At the same time, the pressure block and fixing strap are used to squeeze and tighten the circumferential surface and chamfer of the top cover, respectively, achieving multi-directional synchronous fixing of the top cover. This further ensures the tightness of the connection between the top cover and the outer shell. The circumferential arrangement of the pressure block also prevents the top cover from sliding on the horizontal surface during the welding process, ensuring precise alignment between the top cover and the outer shell, thereby guaranteeing the welding quality.

[0016] In this invention, by setting up an airflow assembly, the airflow ejected from the nozzle flows within the protective shell during the welding process, forming a protective gas ring around the weld. This ensures that the protective gas fully and evenly covers all parts of the weld, and also avoids the influence of external airflow on the protective gas, thus ensuring the quality of the weld. At the same time, the nozzle angle and the direction of the air guide plate can be adjusted as needed, so that the protective gas can act on the weld in the optimal flow direction, further improving the stability of the weld quality. In addition, the first and second guide bars can guide the particulate impurities entrained in the airflow, allowing the impurities to pass through the screening plate in an orderly manner and fall into the receiving box, effectively reducing the contamination of the weld by particulate impurities during the welding process, and ensuring the cleanliness of the welding environment and the quality of weld formation.

[0017] In this invention, by setting up a clamping assembly, this design enables the second swing seat to swing by the pressure of the shell on the support plate when the shell and the top cover are pressed and fixed. This allows the flexible plate to clamp and fix the shell. At the same time, the elastic plate can produce differentiated deformation according to the uneven structure of the outer wall of the shell, ensuring that the flexible plate fits tightly with the uneven parts of the outer wall of the shell. This avoids loosening of the clamping due to the unevenness of the shell surface. Furthermore, the push rod pushes the limiting block to ensure that the flexible plate can make close contact with the outer wall of the shell, thereby ensuring the stability of the clamping and preventing displacement during the welding process. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of a gas generator laser welding device.

[0019] Figure 2 This is a schematic diagram showing the disassembled structure of a gas generator laser welding device.

[0020] Figure 3 This is a schematic diagram showing the disassembled structure of the pressure component in a gas generator laser welding device.

[0021] Figure 4 This is a schematic diagram of a partially disassembled structure of the pressure component in a gas generator laser welding device.

[0022] Figure 5 This is a schematic diagram showing the disassembled structure of the gas flow component in a gas generator laser welding device.

[0023] Figure 6 for Figure 5 A magnified structural diagram of part A in the middle.

[0024] Figure 7 This is a schematic diagram of the airflow component in a gas generator laser welding device from another angle.

[0025] Figure 8 for Figure 7 A magnified structural diagram of part B.

[0026] Figure 9 This is a schematic cross-sectional view of the gas flow component in a gas generator laser welding device.

[0027] Figure 10 This is a schematic diagram showing the disassembled structure of a clamping component in a gas generator laser welding device.

[0028] Figure 11 This is a schematic diagram of the bottom structure of a support plate in a gas generator laser welding device.

[0029] Figure 12This is a partial structural diagram of a clamping component in a gas generator laser welding device.

[0030] Legend: 1. Welding module; 2. Support plate; 3. Pressing assembly; 301. First electric push rod; 302. Connecting frame; 303. Bearing seat; 304. Mounting plate; 305. Fixing frame; 306. Pressure plate; 307. Lever; 308. First swing seat; 309. Pressure rod; 310. Plug-in seat; 311. Fixing strap; 312. Pressure block; 313. First spring; 314. Slide rod; 315. Connecting block; 4. Airflow assembly; 401. Nozzle holder; 402. Nozzle; 403. Protective shell; 404. First guide bar; 405. Air guide plate; 406. Second guide bar; 4 07. Receiving box; 408. Gear; 409. Rack; 410. Bolt; 411. Vertical plate; 412. Second electric push rod; 413. Connecting seat; 414. Screening plate; 415. Fixing rod; 416. Insertion rod; 417. Fixing plate; 5. Clamping assembly; 501. Support plate; 502. Fixing seat; 503. Flexible plate; 504. Second swing seat; 505. Push rod; 506. Limiting block; 507. Elastic plate; 508. Swing rod; 509. Support seat; 510. Rotary table; 511. Limiting rod; 512. Second spring; 6. Base plate. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figures 1-12 The present invention provides a technical solution: a gas generator laser welding device, including a base plate 6, a support plate 2 installed on one side of the base plate 6, a welding module 1 provided on one side of the base plate 6, and further including: The clamping assembly 5 includes a support plate 501 disposed above the base plate 6. The support plate 501 has a flexible plate 503 at its edge, and multiple flexible plates 503 are arranged circumferentially. The flexible plates 503 are used to clamp and fix the outer circular surface of the outer shell. The pressing component 3 includes a pressure plate 306 disposed above the base plate 6, and a plurality of pressure blocks 312 are arranged around the outer circumference of the pressure plate 306. The pressure plate 306 and the pressure blocks 312 are used to press and fix the top of the upper cover. Airflow assembly 4 includes a nozzle seat 401 disposed above the flexible plate 503, a nozzle 402 mounted on one side of the nozzle seat 401, and multiple nozzles 402 arranged circumferentially on both the nozzle seat 401 and the nozzle 402, and gas is ejected through the nozzle 402 to protect the weld. like Figure 3 , Figure 4 As shown, the pressing assembly 3 also includes: a first electric push rod 301, a mounting plate 304, and a slide rod 314; The first electric push rod 301 is installed on the top surface of the support plate 2. The telescopic end of the first electric push rod 301 passes through the support plate 2 and is installed with a connecting frame 302. The mounting plate 304 is located below the connecting frame 302. The top surface of the mounting plate 304 is installed with a bearing seat 303. The top surface of the bearing seat 303 is fixedly connected to the connecting frame 302. The first electric push rod 301 drives the mounting plate 304 to move. The slide rod 314 is installed on the top surface of the pressure plate 306. The slide rod 314 is slidably connected to the mounting plate 304 through the internal through hole of the mounting plate 304. The outer wall of the slide rod 314 is fitted with a first spring 313. The two ends of the first spring 313 are fixedly connected to the mounting plate 304 and the pressure plate 306 respectively. The movement of the mounting plate 304 drives the pressure plate 306 to press the upper cover. The pressing assembly 3 also includes: a first swing seat 308, a pressure rod 309, and a plug-in seat 310; The first swing seat 308 is rotatably installed at the edge notch of the mounting plate 304, and multiple first swing seats 308 are arranged circumferentially. A lever 307 is installed at the top of the first swing seat 308. A pressure rod 309 is slidably installed on one side of the first swing seat 308, and one end of the pressure rod 309 is hinged to the pressure block 312. By rotating the first swing seat 308, the pressure rod 309 pushes the pressure block 312 to press and fix the outer wall of the upper cover. The plug seat 310 is inserted into the through holes on both sides of the first swing seat 308, and the pressure rod 309 has through holes on both sides corresponding to the plug seat 310. Multiple through holes are arranged linearly. The plug seat 310 is connected to the through holes at different positions in the pressure rod 309 to adjust the extension length of the pressure rod 309. The pressing assembly 3 also includes: a fixing frame 305 and a fixing strap 311; The fixing frame 305 is installed on the top surface of the pressure plate 306, and multiple fixing frames 305 are arranged circumferentially. The fixing frame 305 is slidably connected to the mounting plate 304 through the internal through hole of the mounting plate 304. One end of the fixing frame 305 is slidably connected to the lever 307 through the internal sliding groove of the lever 307. As the pressure plate 306 and the mounting plate 304 are relatively displaced, the fixing frame 305 moves the lever 307 and the first swing seat 308 to rotate, thereby driving the pressure block 312 to squeeze. One end of the fixing band 311 is installed in the groove on the bottom surface of the pressure plate 306, and multiple fixing bands 311 are arranged circumferentially. The other end of the fixing band 311 is installed with a connecting block 315, and the connecting block 315 is engaged with the pressure block 312 through the groove on one side of the pressure block 312. The movement of the pressure block 312 is used to pull the fixing band 311 to squeeze the top cover. It should be noted that the welding module 1 consists of a laser generator and a corresponding robotic arm, which is well known in this technical field, so it has not been described in detail in this article.

[0033] Specifically: When welding the gas generator, after aligning its top cover with the housing, it is placed on the top surface of the support plate 501. Then, the connecting frame 302 can be moved by the first electric push rod 301, thereby moving the mounting plate 304 and the pressure plate 306 downward. When the pressure plate 306 contacts the top cover, the mounting plate 304 and the pressure plate 306 are relatively displaced due to the obstruction of the top cover, and the first spring 313 is compressed. Furthermore, as the first electric push rod 301 drives the mounting plate 304 to continue moving, the fixed frame 305 can push the lever 307 to drive the first swing seat 308 to rotate, and then the pressure rod 309 drives the pressure block 312 to press and fix the circumferential surface of the upper cover. Furthermore, as the pressure block 312 adheres to the circumferential surface of the upper cover, it can drive the fixing strip 311 to adhere to the top surface of the upper cover, so as to further fix the upper cover. Furthermore, before pressing down, the downward movement length of the pressure rod 309 can be adjusted according to the size and shape of the top cover, and the pressure rod 309 can be fixed by inserting the plug seat 310 into the first swing seat 308. At the same time, the connecting block 315 can be slid into the corresponding groove on one side of the pressure block 312 for locking, so as to adjust the extension length of the fixing band 311.

[0034] like Figures 5-9 As shown, the airflow assembly 4 also includes: a protective shell 403, a first guide bar 404, a screening plate 414, and an air guide plate 405; A protective shell 403 is disposed on the outside of the nozzle holder 401, and multiple protective shells 403 are arranged circumferentially. The protective shells 403 are arc-shaped, forming a protective ring. A first guide strip 404 is installed on the inner wall of the protective shell 403. The first guide strip 404 is an inclined arc-shaped strip, and multiple first guide strips 404 are evenly arranged. The first guide strips 404 guide particulate impurities. A screening plate 414 is installed on one side of the bottom of the protective shell 403. A receiving box 407 is installed at the bottom. Particle impurities are guided through the screening plate 414 by the first guide bar 404 and collected by the receiving box 407. The air guide plate 405 is set inside the protective shell 403, and multiple air guide plates 405 are evenly arranged. A fixing rod 415 is installed at the bottom of the air guide plate 405. The fixing rod 415 is rotatably connected to the screening plate 414 and the receiving box 407 through the through holes inside the screening plate 414 and the receiving box 407. The air guide plate 405 guides the airflow to blow towards the weld. The airflow assembly 4 also includes: a second guide bar 406, a gear 408, and a second electric push rod 412; The second guide bar 406 is installed on one side of the air guide plate 405, and multiple second guide bars 406 are evenly arranged. The second guide bar 406 is used to guide particulate impurities. The gear 408 is installed at the bottom of the fixed rod 415, and a rack 409 is meshed on one side of the gear 408. A connecting seat 413 is installed on one side of the rack 409. The rack 409 drives the gear 408 to rotate to adjust the direction of the air guide plate 405. One end of the second electric push rod 412 is rotatably installed on the rotating shaft at the bottom of the protective shell 403, and the telescopic end of the second electric push rod 412 is hinged to the connecting seat 413. The telescopic extension of the second electric push rod 412 drives the rack 409 to move, thereby adjusting the direction of the air guide plate 405. The airflow assembly 4 also includes: a fixed plate 417, a plug rod 416, and a vertical plate 411; The fixing plate 417 is installed on the pipe that passes through the protective shell 403 at the top of the nozzle holder 401. The angle of the nozzle holder 401 can be adjusted by rotating the fixing plate 417. The plug rod 416 is inserted into the through hole inside the fixing plate 417 and is inserted into the protective shell 403 through the groove at the top of the protective shell 403. The insertion of the plug rod 416 into the fixing plate 417 limits the position of the nozzle holder 401. The upright plate 411 is set below the protective shell 403. The top of the upright plate 411 is provided with a bolt 410. The bolt 410 is used to fix the upright plate 411 to the hinge seat at the bottom of the protective shell 403.

[0035] Specifically: When welding the top cover and outer shell of the gas generator, as the second swing seat 504 drives the flexible plate 503 to clamp the outer shell, the vertical plate 411 can be used to drive the protective shell 403 and the nozzle seat 401 to swing to the outer edge of the weld. At the same time, the protective shell 403 can be rotated to ensure that it is in a horizontal state and the bolt 410 can be used to press the vertical plate 411 to fix the protective shell 403. Furthermore, during the welding process, the pipe at the top of the nozzle holder 401 can be connected to the pipe for supplying protective gas. Then, the protective gas can be sprayed out through the nozzle 402 on one side of the nozzle holder 401 to protect the weld. At the same time, since the circumferentially set protective shell 403 can form a ring, the gas can flow in the ring and be guided by the air guide plate 405 to flow towards the weld, thereby ensuring that the gas can fully fill the weld for protection. Furthermore, the angle of the sprayed airflow can be adjusted by pulling out the plug rod 416 and rotating the angle between the fixing plate 417 and the nozzle seat 401. The plug rod 416 can then be reinserted into the groove on the top surface of the fixing plate 417 and the protective shell 403 to fix the nozzle seat 401. The extension and retraction of the second electric push rod 412 can drive the connecting seat 413 and the rack 409 to move. The movement of the rack 409 drives the gear 408 to rotate, which in turn drives the air guide plate 405 to rotate through the fixing rod 415, thereby adjusting the angle of the air guide plate 405. Furthermore, if particulate impurities are generated during the welding process and are carried by the airflow, since the air guide plate 405 itself is a mesh plate, the mesh can intercept the particulate impurities when the air guide plate 405 guides the airflow. At the same time, under the action of the first guide bar 404 and the second guide bar 406, the particulate impurities can be guided to fall and pass through the screening plate 414 into the receiving box 407.

[0036] like Figures 10-12 As shown, the clamping assembly 5 also includes: a limiting rod 511, a rotating table 510, and a support base 509; A limiting rod 511 is installed on the bottom surface of the support plate 501, and a second spring 512 is installed at the bottom end of the limiting rod 511. A rotating table 510 is installed on the top surface of the base plate 6, and the top surface of the rotating table 510 is provided with a groove corresponding to the limiting rod 511. The bottom end of the second spring 512 is fixedly connected to the rotating table 510. The rotating table 510 drives the support plate 501 and the outer shell to rotate. A support base 509 is installed on the outer wall of the rotating table 510, and multiple support bases are arranged around the circumference of the support base 509. A swing rod 508 is hinged to the top of the support base 509. The clamping assembly 5 also includes: a second swing seat 504, a fixed seat 502, and an elastic plate 507; The second swing seat 504 is hinged to one side of the top of the swing rod 508. The fixed seat 502 is installed on the top surface of the support plate 501, and multiple fixed seats 502 are arranged around the circumference. The top of the fixed seat 502 is hinged to the bottom of the second swing seat 504. The second swing seat 504 is driven to swing by the fixed seat 502 through the downward movement of the support plate 501. The elastic plate 507 is installed on one side of the flexible plate 503, and the other side of the elastic plate 507 is fixedly connected to the second swing seat 504. The movement of the second swing seat 504 pushes the elastic plate 507 to contact the flexible plate 503 and the outer wall of the shell. The clamping assembly 5 also includes: a limiting block 506 and a push rod 505; The limiting block 506 is installed on one side of the flexible plate 503, and the push rod 505 is installed on both sides of the second swing seat 504, with the other end of the push rod 505 corresponding to the limiting block 506. The swing of the second swing seat 504 drives the push rod 505 to squeeze the limiting block 506.

[0037] Specifically: As the pressure plate 306 presses the upper cover, it can push the upper cover and the outer shell downward to press the support plate 501, and as the support plate 501 moves downward, it can pull the second swing seat 504 to swing through the fixed seat 502. Furthermore, as the second swing seat 504 swings, it can drive the flexible plate 503 and the elastic plate 507 to move, so that the flexible plate 503 is in contact with the outer circumferential surface of the shell. If there is a protrusion on the outer shell, the elastic plate 507 will deform to different degrees to ensure that the flexible plate 503 can be in close contact with the outer circumferential surface of the shell. Furthermore, as the second swing seat 504 rotates, it can drive the push rod 505 to contact the limiting block 506. At the same time, as the second swing seat 504 presses the elastic plate 507, the push rod 505 can press the limiting block 506, so that the flexible plate 503 is subjected to a pulling force to both sides, so as to further ensure that the flexible plate 503 can be tightly attached to the circumferential surface of the outer shell.

[0038] Working principle: First, align the top cover with the housing and place it on the support plate 501. Start the first electric push rod 301 to drive the mounting plate 304 and the pressure plate 306 downward. After the pressure plate 306 contacts the top cover, the mounting plate 304 continues to descend, compressing the first spring 313 and causing relative displacement between the mounting plate 304 and the pressure plate 306. As the mounting plate 304 continues to press down, the fixing frame 305 moves the lever 307 to drive the first swing seat 308 to rotate. Then, the pressure rod 309 drives the pressure block 312 to swing inward to squeeze and fix the outer circumference of the top cover. At the same time, the movement of the pressure block 312 will pull the fixing strap 311 to fit against the top surface of the top cover, thereby achieving double fixation of the top cover. Furthermore, the upper cover and the shell as a whole move down to push the support plate 501 down, and drive the second swing seat 504 to swing through the fixed seat 502, pushing the elastic plate 507 and the flexible plate 503 to gather inward and fit tightly against the outer circumference of the shell. While the clamping action is in progress, the upright plate 411 drives the protective shell 403 and the nozzle seat 401 to swing to the outer edge of the weld and fix them with bolts 410. Multiple arc-shaped protective shells 403 are connected end to end to form an annular protective cavity. After the nozzle seat 401 is connected to the protective gas source, the gas is sprayed into the annular cavity through the nozzle 402 and flows evenly to the weld area under the guidance of the air guide plate 405 to form a gas protective layer. Furthermore, during welding, the rotary table 510 drives the outer shell and the upper cover to rotate in conjunction with the welding module 1 to complete the circumferential welding. During this process, the plug rod 416 can be pulled out and the fixed plate 417 can be rotated to adjust the spray angle of the nozzle 402, or the second electric push rod 412 can be activated to drive the fixed rod 415 to rotate through the meshing transmission of the rack 409 and the gear 408. The particulate impurities generated during welding rise with the airflow and are intercepted and guided when they flow through the inclined guide plate 405 and the first guide bar 404. Under the action of gravity and airflow, they fall along the guide bar and pass through the screening plate 414 into the receiving box 407 to achieve self-cleaning. Furthermore, before operation, the extension length of the pressure rod 309 can be adjusted by using the different through holes on the plug-in base 310 and the pressure plate 306 according to the size of the outer shell and the top cover, or the connecting block 315 at the end of the fixing strap 311 can be inserted into the grooves at different positions on the pressure block 312 to adjust the tightness of the fixing strap 311.

[0039] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A gas generator laser welding apparatus, comprising: A base plate (6), a support plate (2) is installed on one side of the base plate (6), and a welding module (1) is provided on one side of the base plate (6). The base plate (6) is characterized by further comprising: The clamping assembly (5) includes a support plate (501) disposed above the base plate (6). The support plate (501) has a flexible plate (503) at its edge, and multiple flexible plates (503) are arranged around its circumference. The flexible plates (503) are used to clamp and fix the outer circular surface of the outer shell. The pressing assembly (3) includes a pressure plate (306) disposed above the base plate (6), and multiple pressure blocks (312) are arranged around the outer circumference of the pressure plate (306). The pressure plate (306) and the pressure blocks (312) are used to press and fix the top of the cover. Airflow assembly (4) includes a nozzle seat (401) disposed above the flexible plate (503), a nozzle (402) is installed on one side of the nozzle seat (401), and multiple nozzles (402) are arranged circumferentially on both the nozzle seat (401) and the nozzle (402), and gas is sprayed out through the nozzle (402) to protect the weld.

2. The gas generator laser welding apparatus according to claim 1, characterized in that, The pressing component (3) further includes: The first electric push rod (301) is installed on the top surface of the support plate (2), and the telescopic end of the first electric push rod (301) is connected to the support plate (2) by a connecting frame (302). Mounting plate (304), the mounting plate (304) is disposed below the connecting frame (302), the top surface of the mounting plate (304) is mounted with a bearing seat (303), the top surface of the bearing seat (303) is fixedly connected to the connecting frame (302), and the mounting plate (304) is moved by the first electric push rod (301); A sliding rod (314) is installed on the top surface of the pressure plate (306), and the sliding rod (314) is slidably connected to the mounting plate (304) through the internal through hole of the mounting plate (304). A first spring (313) is sleeved on the outer wall of the sliding rod (314), and the two ends of the first spring (313) are fixedly connected to the mounting plate (304) and the pressure plate (306) respectively. The movement of the mounting plate (304) drives the pressure plate (306) to squeeze the upper cover.

3. The gas generator laser welding apparatus according to claim 2, characterized in that, The pressing component (3) further includes: The first swing seat (308) is rotatably mounted at the edge notch of the mounting plate (304), and multiple first swing seats (308) are arranged circumferentially. A lever (307) is installed at the top of the first swing seat (308). The pressure rod (309) is slidably installed on one side of the first swing seat (308), and one end of the pressure rod (309) is hinged to the pressure block (312). The pressure rod (309) pushes the pressure block (312) to press and fix the outer wall of the upper cover by rotating the first swing seat (308). The plug-in seat (310) is inserted into the through holes on both sides of the first swing seat (308), and the pressure rod (309) has through holes on both sides corresponding to the plug-in seat (310), and there are multiple through holes arranged linearly. The plug-in seat (310) is connected to the through holes at different positions in the pressure rod (309) to adjust the extension length of the pressure rod (309).

4. The gas generator laser welding apparatus according to claim 3, characterized in that, The pressing component (3) further includes: A fixing frame (305) is installed on the top surface of the pressure plate (306), and multiple fixing frames (305) are arranged around the circumference. The fixing frame (305) is slidably connected to the mounting plate (304) through the internal through hole of the mounting plate (304). One end of the fixing frame (305) is slidably connected to the lever (307) through the internal sliding groove of the lever (307). As the pressure plate (306) and the mounting plate (304) generate relative displacement, the fixing frame (305) moves the lever (307) and the first swing seat (308) to rotate, thereby driving the pressure block (312) to squeeze. A fixing strap (311) is installed at one end in a groove on the bottom surface of the pressure plate (306), and multiple fixing straps (311) are arranged around the circumference. A connecting block (315) is installed at the other end of the fixing strap (311), and the connecting block (315) is engaged with the pressure block (312) through a groove on one side of the pressure block (312). The movement of the pressure block (312) is used to pull the fixing strap (311) to squeeze the top cover.

5. The gas generator laser welding apparatus according to claim 1, characterized in that, The airflow assembly (4) further includes: A protective shell (403) is provided on the outside of the nozzle seat (401), and multiple protective shells (403) are arranged circumferentially, and the protective shells (403) are arc-shaped, forming a protective ring through the circumferentially arranged protective shells (403); The first guide strip (404) is installed on the inner wall of the protective shell (403), and the first guide strip (404) is an inclined arc-shaped strip, and multiple first guide strips (404) are evenly arranged to guide particulate impurities. Screening plate (414), the screening plate (414) is installed on one side of the bottom of the protective shell (403), and a receiving box (407) is installed at the bottom of the screening plate (414). The first guide bar (404) guides the particulate impurities through the screening plate (414) and collects them using the receiving box (407). A guide plate (405) is provided inside the protective shell (403), and multiple guide plates (405) are evenly arranged. A fixing rod (415) is installed at the bottom of the guide plate (405), and the fixing rod (415) is rotatably connected to the screening plate (414) and the receiving box (407) through the through hole inside the screening plate (414) and the receiving box (407). The airflow is guided to the weld seam through the guide plate (405).

6. The gas generator laser welding apparatus according to claim 5, characterized in that, The airflow assembly (4) further includes: The second guide bar (406) is installed on one side of the air guide plate (405), and multiple second guide bars (406) are evenly arranged. The second guide bar (406) is used to guide particulate impurities. Gear (408), the gear (408) is installed at the bottom of the fixed rod (415), and a rack (409) meshes with one side of the gear (408). A connecting seat (413) is installed on one side of the rack (409). The rack (409) drives the gear (408) to rotate in order to adjust the direction of the air guide plate (405). The second electric push rod (412) is rotatably mounted on the shaft at the bottom of the protective shell (403) at one end, and the telescopic end of the second electric push rod (412) is hinged to the connecting seat (413). The extension and retraction of the second electric push rod (412) drives the rack (409) to move, thereby adjusting the direction of the air guide plate (405).

7. A gas generator laser welding apparatus according to claim 6, characterized in that, The airflow assembly (4) further includes: A fixing plate (417) is installed on the pipe that passes through the protective shell (403) at the top of the nozzle seat (401). The angle of the nozzle seat (401) can be adjusted by rotating the fixing plate (417). The plug rod (416) is inserted into the through hole inside the fixed plate (417), and the plug rod (416) is inserted into the protective shell (403) through the groove at the top of the protective shell (403). The plug rod (416) is inserted into the fixed plate (417) to limit the nozzle seat (401). The upright plate (411) is located below the protective shell (403). The top of the upright plate (411) is provided with bolts (410), which are used to fix the upright plate (411) to the hinge seat at the bottom of the protective shell (403).

8. The gas generator laser welding apparatus according to claim 1, characterized in that, The clamping assembly (5) further includes: A limiting rod (511) is installed on the bottom surface of the support plate (501), and a second spring (512) is installed at the bottom end of the limiting rod (511). A rotating platform (510) is installed on the top surface of the base plate (6), and the top surface of the rotating platform (510) is provided with a groove corresponding to the limiting rod (511). The bottom end of the second spring (512) is fixedly connected to the rotating platform (510). The rotating platform (510) drives the support plate (501) and the outer shell to rotate. Support base (509) is installed on the outer wall of the rotary table (510), and multiple support bases (509) are arranged around the circumference of the support base (509). A swing rod (508) is hinged to the top of the support base (509).

9. A gas generator laser welding apparatus according to claim 8, characterized in that, The clamping assembly (5) further includes: The second swing seat (504) is hinged to the top of the swing rod (508) on one side; Fixed seat (502) is installed on the top surface of support plate (501), and multiple fixed seats (502) are arranged around the circumference. The top of fixed seat (502) is hinged to the bottom of second swing seat (504). The second swing seat (504) is driven to swing by the fixed seat (502) through the downward movement of support plate (501). An elastic plate (507) is installed on one side of a flexible plate (503), and the other side of the elastic plate (507) is fixedly connected to a second swing seat (504). The movement of the second swing seat (504) pushes the elastic plate (507) to contact the flexible plate (503) and the outer wall of the outer shell.

10. A gas generator laser welding apparatus according to claim 9, characterized in that, The clamping assembly (5) further includes: A limiting block (506) is installed on one side of the flexible plate (503); Push rod (505) is installed on both sides of the second swing seat (504), and the other end of the push rod (505) corresponds to the limiting block (506). The push rod (505) is driven by the swing of the second swing seat (504) to squeeze the limiting block (506).

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