Laser welding equipment and protection assembly thereof

Abstract

The invention discloses laser welding equipment and a protection assembly thereof, and belongs to the technical field of welding, the laser welding equipment comprises a pedestal and a base plate, the base plate is fixedly arranged on the pedestal, an air suction groove is formed in the base plate, four sliding holes are formed in the base plate, and extrusion adjusting devices are slidably arranged in the sliding holes. The annular air outlet frame, the air suction groove and the first fan assembly are adopted, the isolation measure remarkably reduces the influence of dust in an external area on the laser welding process, the cleanliness of the welding area is guaranteed, the design of airflow flowing downwards in the whole device can effectively carry and discharge smoke and dust generated in the welding process, and the welding quality is improved. According to the process, pollutants are removed, separation of a welding area is avoided, continuity and stability of laser welding are ensured, interference of external dust on the welding process is successfully avoided through the airflow control technology, and high quality and high precision of the laser welding process are ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of welding, and in particular relates to a laser welding device and a protection component thereof. 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, mainly for the welding of 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, and easy automation.

[0003] For example, the Chinese patent with publication number CN113814569B discloses a laser welding device for processing safety stainless steel products, which relates to the field of laser welding equipment. The laser welding device for processing safety stainless steel products includes a supporting horizontal plate, an electromagnetic plate groove is provided at the center of the upper end surface of the supporting horizontal plate, a positioning hole is provided at the center of the bottom surface of the electromagnetic plate groove, a No. 1 bearing is fixedly provided at the inner center of the positioning hole, an adjusting rod is provided at the inner fixed sleeve of the No. 1 bearing, an adsorption electromagnetic plate and a No. 1 bevel gear are fixedly provided at the upper and lower ends of the adjusting rod, respectively, a fine-tuning mechanism is fixedly provided at one side of the lower end surface of the supporting horizontal plate, and a supporting vertical plate is fixedly provided at the edge of the upper end surface of the supporting horizontal plate. The invention provides a laser welding device for processing safety stainless steel products, which is easy to adjust, highly safe, and convenient to use.

[0004] The Chinese patent with publication number CN107052571B discloses a laser welding device and a laser welding method, wherein the laser welding device includes a welding device body, a welding table, a bracket, a dynamic focusing galvanometer welding system, a visual inspection system, a workpiece positioning mechanism, a welding head adjustment drive mechanism and a control system. The invention obtains image data of the workpiece through the visual inspection system to accurately locate the weld on the workpiece, and controls the welding head to move quickly to the weld position through the control system, so that the dynamic focusing galvanometer welding system emits laser pulses to perform fast and accurate laser scanning welding on the workpiece. At the same time, during the laser scanning welding process, the defocus error of the laser pulse emitted by the dynamic focusing galvanometer welding system is dynamically compensated to achieve dynamic focusing of the laser pulse, which can greatly improve the welding efficiency and accuracy of laser welding and reduce labor costs.

[0005] In actual use, there are still the following problems:

[0006] In the field of laser welding technology, in order to ensure the cleanliness of optical components and the stability of welding effects, existing laser welding equipment cleverly installs an air outlet nozzle on the laser head to effectively remove dust and impurities on the optical components by spraying a protective airflow. However, smoke is inevitably generated during traditional laser welding. The protective airflow sprayed downward from the top directly acts on the placement table and the workpiece surface. The airflow is blocked and reflected, which will cause obvious airflow turbulence. If the airflow is turbulent, smoke and dust will spread everywhere. These smoke and dust will not only refract and block the laser, but also prevent the laser from accurately acting on the workpiece surface, thereby affecting the welding quality of the workpiece. At the same time, the smoke that spreads everywhere will also cause environmental pollution.

[0007] Based on this, the present invention designs a laser welding device and a protection component thereof to solve the above problems. Summary of the invention

[0008] The purpose of the present invention is to propose a laser welding device and a protective component thereof in order to solve the problem that smoke and dust not only refract and block the laser, thereby affecting the welding quality of the workpiece, but also the smoke spreading everywhere also causes environmental pollution.

[0009] In order to achieve the above object, the present invention adopts the following technical solutions:

[0010] A protection component includes a cushion seat and a cushion plate, wherein the cushion plate is fixed on the cushion seat, an air suction groove is provided on the cushion plate, four sliding holes are provided on the cushion plate, an extrusion adjustment device is slidably provided in the sliding holes, a first annular tube and a second annular tube are connected to the side of the extrusion adjustment device, an extension tube is connected to the outside of the second annular tube, the other end of the extension tube is connected to a sliding limiting mechanism fixedly connected under the cushion plate, a sliding support mechanism is penetrated through the cushion plate, and a placement seat is fixedly connected to the sliding support mechanism.

[0011] As a further description of the above technical solution:

[0012] The first annular tube is connected to a transverse tube on the outside, the other end of the transverse tube is connected to a filter box, the side of the filter box is connected to a first fan assembly, the air suction groove is set to be annular, and the placement seat is located inside the annular air suction groove.

[0013] As a further description of the above technical solution:

[0014] The extrusion adjustment device includes an air storage frame, an extrusion plate is slidably connected inside the air storage frame, a contact rod is fixedly connected to the extrusion plate, the contact rod passes through and is slidably arranged on the air storage frame, the contact rod is slidably connected in a sliding hole, a first elastic component is fixedly connected under the extrusion plate, and the other end of the first elastic component is fixedly connected inside the air storage frame.

[0015] As a further description of the above technical solution:

[0016] The side of the air storage frame is connected to an air intake valve, and the side of the air intake valve is connected to an air intake pipe, and the air intake pipe passes through under the pad and is connected to the air intake groove, and the side of the air storage frame is connected to a connector, and the connector is connected to the second annular tube, and the side of the air storage frame is connected to an intermediate tube, and the other end of the intermediate tube is connected to the first annular tube, the air intake valve and the intermediate tube are connected to an air storage cavity located on the upper side of the extrusion plate in the air storage frame, and the connector is connected to the air storage cavity located on the lower side of the extrusion plate in the air storage frame.

[0017] As a further description of the above technical solution:

[0018] The sliding support mechanism includes a sliding frame fixedly connected under the placement seat, two guide sleeves are slidably connected to the outside of the sliding frame, the guide sleeves are connected through the pad, a connecting sleeve is connected through the bottom of the sliding frame, a connecting rod is slidably connected inside the connecting sleeve, and the top of the connecting rod is fixedly connected to the pad.

[0019] As a further description of the above technical solution:

[0020] The bottom end of the connecting rod is fixedly connected to a limiting plate, the outer sleeve of the connecting rod is provided with a second elastic component, the two ends of the second elastic component are respectively fixedly connected to the pad and the connecting sleeve, and the inner wall of the sliding frame is provided with four limiting grooves.

[0021] As a further description of the above technical solution:

[0022] The sliding limiting mechanism includes an air cylinder and a fixed seat fixedly connected under a pad, two piston plates are slidably connected inside the air cylinder, a moving rod is fixedly connected to the side of the piston plate, the moving rod passes through and is slidably connected to the side of the air cylinder, an air hole is opened on the air cylinder, and the air hole is located between the two piston plates.

[0023] As a further description of the above technical solution:

[0024] The air cylinder is connected to the extension tube, and one end of the moving rod outside the air cylinder is fixedly connected to a limiting block, and the limiting block can be moved into a limiting groove. A third elastic component is disposed on the outer sleeve of the moving rod, and both ends of the third elastic component are respectively fixedly connected to the piston plate and the inner wall of the air cylinder.

[0025] A laser welding device comprises a supporting cabinet and an annular air outlet frame, wherein the cushion is fixedly connected to the supporting cabinet, the supporting cabinet is provided with a controller, the cushion is fixedly connected to a mounting seat, the mounting seat is provided with a rotating arm, the end of the rotating arm is fixedly connected to a laser welding head, and the laser welding head is located in the annular air outlet frame.

[0026] As a further description of the above technical solution:

[0027] Two extension blocks are fixedly connected to the outside of the annular air outlet frame, a fixing rod is fixedly connected under the extension block, the fixing rod is fixedly connected to the cushion seat, a connecting pipe is connected to the outside of the air storage frame, and the other end of the connecting pipe is connected to the second fan assembly, the position of the annular air outlet frame corresponds to the position of the air suction groove, and the air storage frame and the filter box are fixedly connected to the support cabinet.

[0028] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0029] 1. In the present invention, an annular air outlet frame, an air suction groove, and a first fan assembly are adopted, and the annular air outlet frame and the air suction groove structure are innovatively designed, and cooperated with the first fan assembly to form a closed air flow circulation system. The gas blown out by the upper annular air outlet frame in the system is effectively absorbed by the air suction groove on the lower side, and a stable annular air wall is constructed. The annular air wall effectively surrounds the laser welding head and realizes the physical isolation of the welding position and the surrounding environment. This isolation measure significantly reduces the influence of dust in the external area on the laser welding process and ensures the cleanliness of the welding area. The overall downward airflow design in the equipment can effectively carry and discharge the smoke and dust generated in the welding process. This process not only removes pollutants, but also avoids the separation of the welding area, ensuring the continuity and stability of laser welding. Through this airflow control technology, the present invention successfully avoids the interference of external dust on the welding process and ensures the high quality and high precision of the laser welding process.

[0030] 2. In the present invention, a placement seat, a sliding frame, a second elastic component, a gas storage frame, an air cylinder, a limit block and a limit groove are used to form an efficient and stable workpiece placement system. The placement seat moves downward smoothly under the action of the gravity of the workpiece, ensuring the precise positioning of the workpiece. When the placement seat moves downward, the contact rod is squeezed, and then the extrusion plate is pushed to achieve gas squeezing. This process also utilizes the deformation characteristics of the second elastic component to provide a buffer for the downward movement of the placement seat, effectively avoiding the violent vibration that may be generated when the workpiece is placed, and improving the safety and stability of the operation. The gas in the gas storage frame flows into the air cylinder under the action of squeezing, triggering the limit block to automatically snap into the limit groove, thereby achieving firm fixation of the sliding frame and the placement seat. This automated fixing mechanism ensures the stability and accuracy of the workpiece during the placement process. Through the above design, the lowering process of the workpiece becomes smoother and smoother, greatly improving the working efficiency and welding quality of the laser welding equipment.

[0031] 3. In the present invention, air holes, a third elastic component, a limit groove and a limit block are used. When high-pressure gas is injected into the gas cylinder, the synchronous movement of the piston plate and the limit block enables the limit block to be accurately embedded in the limit groove, thereby automatically realizing the stable limitation of the sliding frame, ensuring the absolute stability of the workpiece during the welding process. The air holes in the equipment can continuously and effectively discharge the gas in the gas cylinder step by step. As the gas pressure decreases, the elastic force of the third elastic component eventually exceeds the gas pressure, resulting in automatic separation of the limit block and the limit groove. This process does not require manual intervention, which greatly improves the automation level of the equipment. After a set period of time, the limit block is automatically released from the limit groove, thereby easily releasing the fixation of the placement seat, providing great convenience for the rapid resetting of the placement seat, and optimizing the operation process of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic diagram of the three-dimensional structure of a laser welding device and its protective components proposed by the present invention;

[0033] Figure 2 A schematic diagram of the three-dimensional structure of a ring-shaped air outlet frame of a laser welding device and a protective component thereof proposed by the present invention;

[0034] Figure 3 A schematic diagram of the three-dimensional structure of a fixing rod of a laser welding device and a protection component thereof proposed by the present invention;

[0035] Figure 4 This is a bottom-up stereoscopic structural diagram of a laser welding device and a backing plate of a protective component thereof proposed by the present invention;

[0036] Figure 5 A schematic diagram of a three-dimensional cross-sectional structure of a laser welding device and an extrusion adjustment device of a protective component thereof proposed by the present invention;

[0037] Figure 6 A laser welding device and a protective component thereof proposed by the present invention Figure 5 The enlarged structural diagram of part A in the middle;

[0038] Figure 7 A schematic diagram of the three-dimensional structure of a sliding hole of a laser welding device and a protective component thereof proposed by the present invention;

[0039] Figure 8 A schematic diagram of the three-dimensional structure of a laser welding device and a placement seat for a protective component thereof proposed by the present invention;

[0040] Fig. 9 A schematic diagram of the three-dimensional structure of a sliding support mechanism of a laser welding device and a protection component thereof proposed by the present invention;

[0041] Fig.10This is a schematic diagram of the three-dimensional cross-sectional structure of a sliding limit mechanism of a laser welding device and a protection component thereof proposed by the present invention.

[0042] Legend:

[0043] 1. Support cabinet; 2. Cushion seat; 3. Mounting seat; 4. Rotating arm; 5. Laser welding head; 6. Controller; 7. Pad; 8. Air suction groove; 9. Sliding hole; 10. Extrusion adjustment device; 101. Air storage frame; 102. Extrusion plate; 103. First elastic component; 104. Contact rod; 105. Inlet valve; 106. Air suction pipe; 107. Connector; 108. Intermediate pipe; 11. First annular pipe; 12. Second annular pipe; 13. Horizontal pipe; 14. Filter box; 15. First fan assembly; 16. Placement seat; 17 , sliding support mechanism; 171, sliding frame; 172, guide sleeve; 173, limiting groove; 174, connecting sleeve; 175, connecting rod; 176, second elastic component; 177, limiting plate; 18, extension pipe; 19, sliding limiting mechanism; 191, air cylinder; 192, fixing seat; 193, air hole; 194, piston plate; 195, moving rod; 196, limiting block; 197, third elastic component; 20, annular air outlet frame; 21, extension block; 22, fixing rod; 23, connecting pipe; 24, second fan assembly. DETAILED DESCRIPTION

[0044] 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.

[0045] Please refer to the attached Figure 1 -Attached Fig.10 The present invention provides a technical solution: a protection component, including a cushion seat 2 and a cushion plate 7, the cushion plate 7 is fixed on the cushion seat 2, an air suction groove 8 is opened on the cushion plate 7, four sliding holes 9 are opened on the cushion plate 7, an extrusion adjustment device 10 is slidably arranged in the sliding holes 9, a first annular tube 11 and a second annular tube 12 are connected to the side of the extrusion adjustment device 10, an extension tube 18 is connected to the outside of the second annular tube 12, the other end of the extension tube 18 is connected to a sliding limiting mechanism 19 fixedly connected under the cushion plate 7, a sliding support mechanism 17 is penetrated through the cushion plate 7, and a placement seat 16 is fixedly connected to the sliding support mechanism 17.

[0046] The air suction groove 8 and the annular air outlet frame 20 are used in combination. The annular air wall discharged by the annular air outlet frame 20 cooperates with the gas sucked by the air suction groove 8 to form an area for welding and covering the laser welding head 5. At the same time, the smoke and dust generated in the welding area are sucked and processed;

[0047] Specifically, Figure 4-5 As shown, the first annular tube 11 is connected to a transverse tube 13 on the outside, the other end of the transverse tube 13 is connected to a filter box 14 , the side of the filter box 14 is connected to a first fan assembly 15 , the air intake groove 8 is set to be annular, and the placement seat 16 is located inside the annular air intake groove 8 .

[0048] The first fan assembly 15 can suck the gas containing smoke and dust into the filter box 14 through the transverse pipe 13 to filter the gas.

[0049] Specifically, Figure 5-6 As shown, the extrusion adjustment device 10 includes an air storage frame 101, an extrusion plate 102 is slidably connected inside the air storage frame 101, a contact rod 104 is fixedly connected to the extrusion plate 102, the contact rod 104 passes through and is slidably arranged on the air storage frame 101, the contact rod 104 is slidably connected in the sliding hole 9, a first elastic component 103 is fixedly connected under the extrusion plate 102, and the other end of the first elastic component 103 is fixedly connected inside the air storage frame 101.

[0050] The side of the air storage frame 101 is connected to an air intake valve 105, and the side of the air intake valve 105 is connected to an air intake pipe 106, which runs through the bottom of the pad 7 and is connected to the air intake groove 8. The side of the air storage frame 101 is connected to a connector 107, and the connector 107 is connected to the second annular tube 12. The side of the air storage frame 101 is connected to an intermediate tube 108, and the other end of the intermediate tube 108 is connected to the first annular tube 11. The air intake valve 105 and the intermediate tube 108 are connected to an air storage cavity located on the upper side of the extrusion plate 102 in the air storage frame 101, and the connector 107 is connected to the air storage cavity located on the lower side of the extrusion plate 102 in the air storage frame 101.

[0051] When the contact rod 104 and the extrusion plate 102 move downward, the gas in the gas storage cavity on the lower side of the gas storage frame 101 will be squeezed into the gas cylinder 191. At the same time, the first elastic component 103 buffers the downward movement of the extrusion plate 102. Subsequently, the elastic force of the first elastic component 103 can control the extrusion plate 102 to reset upward. The gas storage cavity on the upper side of the gas storage frame 101 can suck the gas in the suction groove 8 through the intake valve 105 and the suction pipe 106. At the same time, the gas in the gas storage cavity on the lower side of the gas storage frame 101 is squeezed into the gas cylinder 191, so as to adjust the air pressure in the gas cylinder 191.

[0052] Specifically, Figure 8-9 As shown, the sliding support mechanism 17 includes a sliding frame 171 fixedly connected under the placement seat 16, and two guide sleeves 172 are slidably connected to the outside of the sliding frame 171. The guide sleeves 172 are connected through the pad 7, and a connecting sleeve 174 is connected through the bottom of the sliding frame 171. A connecting rod 175 is slidably connected inside the connecting sleeve 174, and the top of the connecting rod 175 is fixedly connected to the pad 7.

[0053] The bottom end of the connecting rod 175 is fixedly connected to the limiting plate 177 , and the outer sleeve of the connecting rod 175 is provided with a second elastic component 176 . The two ends of the second elastic component 176 are respectively fixedly connected to the pad 7 and the connecting sleeve 174 . The inner wall of the sliding frame 171 is provided with four limiting grooves 173 .

[0054] The sliding frame 171 and the second elastic component 176 cooperate with each other. When the sliding frame 171 and the placement seat 16 move downward, the second elastic component 176 is pulled. The deformation of the second elastic component 176 buffers the downward movement of the placement seat 16. The connecting sleeve 174 and the guide sleeve 172 guide the downward movement of the sliding frame 171 and the placement seat 16.

[0055] Specifically, Figure 8-10 As shown, the sliding limiting mechanism 19 includes an air cylinder 191 and a fixed seat 192 fixedly connected under the pad 7, two piston plates 194 are slidably connected in the air cylinder 191, and a moving rod 195 is fixedly connected to the side of the piston plate 194. The moving rod 195 passes through and is slidably connected to the side of the air cylinder 191. An air hole 193 is opened on the air cylinder 191, and the air hole 193 is located between the two piston plates 194.

[0056] The air cylinder 191 is connected to the extension tube 18, and one end of the moving rod 195 outside the air cylinder 191 is fixedly connected to a limiting block 196, and the limiting block 196 can be moved into the limiting groove 173. The outer sleeve of the moving rod 195 is provided with a third elastic component 197, and the two ends of the third elastic component 197 are respectively fixedly connected to the piston plate 194 and the inner wall of the air cylinder 191.

[0057] The increased air pressure in the air cylinder 191 will control the movement of the piston plate 194 and the moving rod 195. When the placement seat 16 and the sliding frame 171 move downward, the second elastic component 176 will be pulled to extend, thereby providing buffering protection for the workpiece lowering process. When the moving rod 195 moves, it drives the limit block 196 to stick to the surface of the sliding frame 171. When the limit groove 173 moves to the position corresponding to the limit block 196, the limit block 196 is inserted into the limit groove 173 to complete the fixation of the placement seat 16. The increased air pressure in the air cylinder 191 will continuously discharge the gas outward through the air hole 193 until the reduced air pressure in the air cylinder 191 is sufficient for the third elastic component 197 to control the limit block 196 to reset, thereby separating the limit block 196 from the limit groove 173.

[0058] A laser welding device includes a support cabinet 1 and an annular air outlet frame 20, a cushion seat 2 is fixedly connected to the support cabinet 1, a controller 6 is provided on the support cabinet 1, a mounting seat 3 is fixedly connected to the cushion seat 2, a rotating arm 4 is provided on the mounting seat 3, a laser welding head 5 is fixedly connected to the end of the rotating arm 4, and the laser welding head 5 is located in the annular air outlet frame 20.

[0059] Specifically, Figure 1-4 As shown, the annular air outlet frame 20 is fixedly connected to two extension blocks 21 on the outside, and a fixing rod 22 is fixedly connected under the extension block 21. The fixing rod 22 is fixedly connected to the cushion seat 2. The air storage frame 101 is connected to the outside with a connecting pipe 23, and the other end of the connecting pipe 23 is connected to a second fan assembly 24. The position of the annular air outlet frame 20 corresponds to the position of the air intake groove 8, and the air storage frame 101 and the filter box 14 are both fixedly connected to the support cabinet 1.

[0060] Working principle, when using:

[0061] When the workpiece needs to be welded, the workpiece is directly placed on the placement seat 16. The gravity of the workpiece squeezes the placement seat 16 and the sliding frame 171 to move downward. During the downward movement of the placement seat 16, the contact rod 104 and the extrusion plate 102 are squeezed to move downward. When the contact rod 104 and the extrusion plate 102 move downward, the gas in the lower gas storage chamber of the gas storage frame 101 is squeezed into the gas cylinder 191. The increased air pressure in the gas cylinder 191 controls the movement of the piston plate 194 and the moving rod 195. When the placement seat 16 and the sliding frame 171 move downward, the second elastic component 176 is pulled to extend to buffer the process of putting the workpiece down. When the moving rod 195 moves, the limit block 196 is attached to the surface of the sliding frame 171. When the limit groove 173 moves to the position corresponding to the limit block 196, the limit block 196 is inserted into the limit groove 173 to complete the fixation of the placement seat 16, control the laser welding head 5 to work to weld the workpiece, and control the second fan assembly 24 to work at the same time;

[0062] When the second fan assembly 24 is working, it draws gas and discharges the gas through the annular air outlet frame 20. The gas forms an air wall along the downward ring. At the same time, the gas storage cavity on the upper side of the gas storage frame 101 is moved downward by the extrusion plate 102 to draw gas. The gas is drawn through the air inlet valve 105 and the air suction groove 8. The annular gas storage frame 101 discharges gas while the air suction groove 8 draws gas, separating the laser welding part from other spaces. The blown air flow will not hit the pad 7 to cause turbulence. The flowing air wall carries the smoke and dust out to avoid the influence of smoke and dust on the laser-conducted welding.

[0063] The increased air pressure in the air cylinder 191 will continuously discharge the gas outward through the air hole 193 until the reduced air pressure in the air cylinder 191 is sufficient for the third elastic component 197 to control the limit block 196 to reset, so that the limit block 196 is separated from the limit groove 173, and the fixation of the sliding frame 171 and the placement seat 16 is released. The accelerated flow of gas will increase the temperature of the workpiece. After welding is completed, the welding laser head and the second fan assembly 24 are controlled to stop working, and then the first fan assembly 15 is controlled to work, sucking the gas in the upper air storage chamber in the air storage frame 101, and the filter box 14 filters the gas containing smoke and dust, and then the workpiece after welding can be removed.

[0064] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A protection assembly, comprising a cushion seat (2) and a cushion plate (7), characterized in that: The pad (7) is fixed on the pad seat (2), an air suction groove (8) is provided on the pad (7), four sliding holes (9) are provided on the pad (7), an extrusion adjustment device (10) is slidably provided in the sliding hole (9), a first annular tube (11) and a second annular tube (12) are connected to the side of the extrusion adjustment device (10), an extension tube (18) is connected to the outside of the second annular tube (12), the other end of the extension tube (18) is connected to a sliding limit mechanism (19) fixedly connected under the pad (7), a sliding support mechanism (17) is penetrated through the pad (7), and a placement seat (16) is fixedly connected to the sliding support mechanism (17).

2. A protection assembly according to claim 1, characterized in that: The first annular tube (11) is connected to a transverse tube (13) at the outside, the other end of the transverse tube (13) is connected to a filter box (14), the side of the filter box (14) is connected to a first fan assembly (15), the air suction groove (8) is arranged in an annular shape, and the placement seat (16) is located inside the annular air suction groove (8).

3. A protection assembly according to claim 1, characterized in that: The extrusion adjustment device (10) comprises an air storage frame (101), an extrusion plate (102) is slidably connected inside the air storage frame (101), a contact rod (104) is fixedly connected to the extrusion plate (102), the contact rod (104) penetrates and is slidably arranged on the air storage frame (101), the contact rod (104) is slidably connected in a sliding hole (9), a first elastic component (103) is fixedly connected below the extrusion plate (102), and the other end of the first elastic component (103) is fixedly connected inside the air storage frame (101).

4. A protection assembly according to claim 3, characterized in that: The side of the air storage frame (101) is connected to an air intake valve (105), and the side of the air intake valve (105) is connected to an air intake pipe (106). The air intake pipe (106) runs through the bottom of the pad (7) and is connected to the air intake groove (8). The side of the air storage frame (101) is connected to a connector (107), and the connector (107) is connected to the second annular pipe (12). The side of the air storage frame (101) is connected to an intermediate pipe (108), and the other end of the intermediate pipe (108) is connected to the first annular pipe (11). The air intake valve (105) and the intermediate pipe (108) are connected to an air storage cavity located on the upper side of the extrusion plate (102) in the air storage frame (101), and the connector (107) is connected to an air storage cavity located on the lower side of the extrusion plate (102) in the air storage frame (101).

5. A protection assembly according to claim 1, characterized in that: The sliding support mechanism (17) comprises a sliding frame (171) fixedly connected to the placement seat (16); two guide sleeves (172) are slidably connected to the outside of the sliding frame (171); the guide sleeves (172) are connected through the pad (7); a connecting sleeve (174) is connected through the bottom of the sliding frame (171); a connecting rod (175) is slidably connected to the inside of the connecting sleeve (174); the top end of the connecting rod (175) is fixedly connected to the pad (7).

6. A protection assembly according to claim 5, characterized in that: The bottom end of the connecting rod (175) is fixedly connected to a limiting plate (177), a second elastic component (176) is provided on the outer sleeve of the connecting rod (175), two ends of the second elastic component (176) are respectively fixedly connected to the pad (7) and the connecting sleeve (174), and four limiting grooves (173) are provided on the inner wall of the sliding frame (171).

7. A protection assembly according to claim 1, characterized in that: The sliding limit mechanism (19) comprises an air cylinder (191) and a fixed seat (192) fixedly connected under the pad (7); two piston plates (194) are slidably connected inside the air cylinder (191); a moving rod (195) is fixedly connected to the side of the piston plate (194); the moving rod (195) passes through and is slidably connected to the side of the air cylinder (191); an air hole (193) is opened on the air cylinder (191); and the air hole (193) is located between the two piston plates (194).

8. A protection assembly according to claim 7, characterized in that: The gas cylinder (191) is connected to the extension tube (18); one end of the moving rod (195) located outside the gas cylinder (191) is fixedly connected to a limiting block (196); the limiting block (196) can be moved into the limiting groove (173); a third elastic component (197) is provided on the outer sleeve of the moving rod (195); two ends of the third elastic component (197) are respectively fixedly connected to the piston plate (194) and the inner wall of the gas cylinder (191).

9. A laser welding device, comprising the protection assembly according to any one of claims 1 to 8, characterized in that: The invention comprises a support cabinet (1) and an annular air outlet frame (20), wherein the cushion seat (2) is fixedly connected to the support cabinet (1), a controller (6) is provided on the support cabinet (1), a mounting seat (3) is fixedly connected to the cushion seat (2), a rotating arm (4) is provided on the mounting seat (3), a laser welding head (5) is fixedly connected to the end of the rotating arm (4), and the laser welding head (5) is located in the annular air outlet frame (20).

10. The laser welding equipment according to claim 9, characterized in that: The annular air outlet frame (20) is fixedly connected to two extension blocks (21) on the outside, and a fixing rod (22) is fixedly connected to the bottom of the extension block (21), and the fixing rod (22) is fixedly connected to the cushion seat (2). The air storage frame (101) is connected to a connecting pipe (23), and the other end of the connecting pipe (23) is connected to a second fan assembly (24). The position of the annular air outlet frame (20) corresponds to the position of the air suction groove (8), and the air storage frame (101) and the filter box (14) are both fixedly connected to the support cabinet (1).

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