A laser welding device for a forced air box unit

Abstract

This invention discloses a laser welding device for an air-cooled box-type unit, belonging to the field of laser welding. It includes an air-cooled unit and a transmission mechanism. The air-cooled unit includes a box body with a through-type bottom groove on the lower surface of the outer surface. A partition is fixed inside the box body, and a laser welding device is fixed through the middle of the partition. The laser head of the laser welding device is located below the partition. Through the design of the rotating ring and the through-groove on the partition, when the workpiece enters the box body, the rotating through-groove two briefly overlaps with through-groove one, allowing air to be blown away from the workpiece or dust and debris on its surface to be drawn out by the fan, reducing the impact of dust on subsequent processing. During laser welding, through-groove one and through-groove two are staggered and not connected, and the workpiece is in a closed space, reducing interference from gas flow and other factors on the welding process, effectively ensuring the cleanliness of the welding environment and improving welding quality.

Description

Technical Field

[0001] This invention relates to the field of laser welding technology, and in particular to a laser welding device for an air-cooled box-type unit. Background Technology

[0002] With the widespread application of laser welding technology in numerous industrial fields such as electronics, machinery, and automobiles, traditional laser welding equipment has revealed the following problems:

[0003] Insufficient Welding Environment Protection: During the electronic chip welding process, tiny dust particles on the surface of the workpiece can cause problems such as incomplete solder joints and short circuits, seriously affecting product performance and quality. However, traditional equipment lacks effective pretreatment and cleaning mechanisms, making it impossible to thoroughly clean impurities from the workpiece surface before welding. Furthermore, it is difficult to create a stable, sealed environment during welding; gas flow interferes with the laser welding process, resulting in unstable welding quality, a high scrap rate, and an inability to meet the stringent welding quality requirements of high-end manufacturing industries.

[0004] High equipment maintenance costs: In continuous, high-intensity industrial production, the large amount of heat generated by laser welding equipment, if not dissipated in time, will lead to a decline in equipment performance and a shortened lifespan. Traditional heat dissipation methods are inefficient or require complex and expensive cooling systems, increasing equipment and operating costs. Furthermore, dust generated during welding adheres to components such as filters. Traditional equipment relies on regular manual cleaning, which not only consumes significant manpower and resources but also easily affects heat dissipation if cleaning is not timely, leading to equipment failure, reduced production efficiency, and increased operating costs for the enterprise.

[0005] Therefore, a laser welding device for air-cooled box-type units is needed to solve the problems mentioned above. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a laser welding device for air-cooled box-type units, which solves the problems mentioned in the background section.

[0007] Technical Solution: To solve the above-mentioned technical problems, according to one aspect of the present invention, more specifically, a laser welding device for an air-cooled box-type unit, comprising an air-cooled unit and a transmission mechanism, wherein the air-cooled unit includes a box, a through-type bottom groove is formed on the lower surface of the outer surface of the box, a partition is fixed inside the box, a laser welding device is fixed through the middle of the partition, the laser head at the bottom of the laser welding device is located below the partition, an annular groove is formed on the upper surface of the partition, a plurality of through-type slots are formed on the lower surface inside the annular groove, a rotating ring is rotatably connected inside the annular groove, and a plurality of through-type slots are formed inside the rotating ring;

[0008] The air-cooled unit also includes a duct, which is fixedly connected to the top of the housing. A filter screen is fixed inside the upper part of the duct. Air vents are fixedly connected to the front and rear surfaces of the housing. A filter screen is fixed inside each air vent. Two brackets are fixed to the right side of the housing. Rotary shafts are rotatably connected inside the brackets. Helical gears are fixed to the opposite ends of the two rotating shafts, and spur gears are fixed to the opposite ends of the two rotating shafts. Slides are fixed to the front and rear surfaces of the housing. Sliding rods are slidably connected inside the slides. A toothed plate is fixed to the right end of the sliding rod. Helical gear three is rotatably connected to the right side of the housing. Helical gear two is fixed to the center of the right side of helical gear three. Helical gear four is rotatably connected to the right side of the upper surface of the housing. Helical gear four meshes with helical gear three. A swing rod is fixed to the upper surface of helical gear four. A rotating rod is fixed to the center of the lower surface of helical gear four. The bottom end of the rotating rod extends into the housing and is fixed with a rotating wheel. The rotating wheel is rotatably connected to the partition. A fan is installed at the bottom of the duct.

[0009] Furthermore, the transmission mechanism includes a turntable, with its left side located inside the bottom groove and the housing. A shaft is fixed at the center of the upper surface of the turntable, and two incomplete gears are fixed above the outer surface of the shaft. Two material grooves are formed on the upper surface of the turntable, and side grooves are symmetrically formed inside the material grooves. Electric slide rails are provided inside both side grooves, and telescopic rods are slidably connected to the outer surface of the electric slide rails. Clamping seats are fixed at opposite ends of the two telescopic rods, and the workpiece is clamped together between the two clamping seats. A motor is fixed at the bottom of the transmission mechanism.

[0010] Furthermore, the toothed plate is meshed with the adjacent spur gear.

[0011] Furthermore, the outer surface of the rotating wheel is connected to the outer surface of the rotating ring in a driving connection.

[0012] Furthermore, adhesive strips are fixed to the opposite sides of both slide rods, and the slide rods are attached to the outer surface of the second filter screen through the adhesive strips; a pneumatic rod is slidably connected to the lower part of the toothed plate, and the bottom of the pneumatic rod is fixedly connected to the outer surface of the box; an air inlet valve is provided at the top of the toothed plate; several swing wheels are embedded in the upper and lower corners of the slide rod near the second filter screen, and nozzles are inserted inside the swing wheels; a worm gear is fixed coaxially to the swing wheel; the swing wheel and the worm gear are rotatably connected to the slide rod; two worms are rotatably connected inside the slide rod; the worm gear meshes with the adjacent worm; the left ends of both worms extend to the left side of the slide rod and are fixed with transmission wheels; the outer surfaces of both transmission wheels are attached to the outer surface of the air outlet.

[0013] Furthermore, the two incomplete gears are arranged alternately, and the incomplete gears are respectively meshed with the second helical gear and the first helical gear.

[0014] Furthermore, the second through slot is adapted to the first through slot.

[0015] Furthermore, a glass window is fixed through the left side of the enclosure.

[0016] The beneficial effects of the laser welding device for air-cooled box-type units of the present invention are as follows:

[0017] (1) The present invention effectively cleans surface dust and debris when the workpiece enters the box through the coordinated design of the rotating ring and the through groove on the partition, and creates a stable and sealed space during welding, which greatly reduces the probability of welding defects and improves welding quality. In fields with extremely high requirements for welding quality, such as precision electronic equipment manufacturing and high-end mechanical parts processing, it can ensure the high precision and high reliability of the product and meet the industry's growing demand for high-quality production.

[0018] (2) This invention achieves automatic cleaning of filter screen one and filter screen two through a motor-driven transmission mechanism, reducing the workload and cost of manual maintenance. Simultaneously, the fan cools the laser welding equipment, ensuring its stability during long-term operation and extending its service life. This reduces downtime for equipment maintenance, improves production efficiency, and increases the company's economic benefits. Attached Figure Description

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific implementation methods.

[0020] Figure 1 This is a schematic diagram of the structure of the present invention;

[0021] Figure 2 This is a schematic cross-sectional view of the structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of the air-cooled unit in this invention;

[0023] Figure 4 This is a schematic diagram of the internal structure of the air-cooled unit in this invention;

[0024] Figure 5 This is a schematic diagram of the structure of the spacer and the rotating ring in this invention;

[0025] Figure 6 This is a schematic diagram of the partition structure in this invention;

[0026] Figure 7 This is a schematic diagram of the spur gear and transmission mechanism in this invention;

[0027] Figure 8 In this invention Figure 7 A schematic diagram of the left-side view structure;

[0028] Figure 9 This is a schematic diagram of the structure of the air vent and the toothed plate in this invention;

[0029] Figure 10 This is a top-sectional view of the adhesive strip and toothed plate in this invention;

[0030] Figure 11 This is a side cross-sectional view of the slide bar and rubber strip in this invention.

[0031] In the diagram: 1. Air-cooled unit; 11. Housing; 12. Bottom groove; 13. Partition; 14. Laser welding equipment; 15. Ring groove; 16. Through groove one; 17. Rotary ring; 18. Through groove two; 19. Air duct; 110. Filter screen one; 111. Air outlet; 112. Filter screen two; 113. Support; 114. Rotating shaft; 115. Helical gear one; 116. Spur gear one; 117. Slide; 118. Slide rod; 119. Gear plate; 120. Helical gear two; 121. Helical gear three; 122. Helical gear four; 123. Swing rod; 124. Rotating rod; 125. Rotating wheel; 126. Fan; 2. Transmission mechanism; 21. Turntable; 22. Shaft; 23. Incomplete gear; 24. Material trough; 25. Side trough; 26. Electric slide rail; 27. Telescopic rod; 28. Clamping seat; 3. Motor; 4. Glass window; 5. Processed part; 6. Rubber strip; 61. Pneumatic rod; 62. Air inlet valve; 63. Swing wheel; 64. Nozzle; 65. Worm gear; 66. Worm; 67. Transmission wheel. Detailed Implementation

[0032] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in the present application can be combined with each other.

[0033] To make the technical solution of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Reference Figures 1-11 A laser welding device for an air-cooled box-type unit includes an air-cooled unit 1 and a transmission mechanism 2. The air-cooled unit 1 includes a box 11. A through-type bottom groove 12 is opened on the lower part of the outer surface of the box 11. A partition 13 is fixed inside the box 11, which divides the box 11 into two isolated spaces, the lower space for stable processing and the upper space for airflow to cool the equipment. A laser welding device 14 is fixed through the middle of the partition 13. The laser head at the bottom of the laser welding device 14 is located below the partition 13. An annular groove 15 is opened on the upper surface of the partition 13. Multiple through-type first grooves 16 are opened on the lower surface inside the annular groove 15. A rotating ring 17 is rotatably connected inside the annular groove 15. Multiple through-type second grooves 18 are opened through the rotating ring 17. The second grooves 18 are adapted to the first grooves 16.

[0035] The air-cooled unit 1 also includes a duct 19, which is fixed through to the top of the housing 11. A filter screen 110 is fixed inside the upper part of the duct 19. Air vents 111 are fixed through to the front and rear surfaces of the housing 11, and a filter screen 112 is fixed inside the air vents 111. Two brackets 113 are fixed on the right side of the housing 11, and a rotating shaft 114 is rotatably connected inside the brackets 113. Helical gears 115 are fixed at opposite ends of the two rotating shafts 114, and spur gears 116 are fixed at opposite ends of the two rotating shafts 114. A slide 117 is fixed on the front and rear surfaces of the housing 11, and a slide rod 118 is slidably connected inside the slide 117. A toothed plate 119 is fixed at the right end of the slide rod 118, and the toothed plate 119 meshes with the adjacent spur gear 116. A helical gear is rotatably connected to the right side of the housing 11. Helical gear 120 is fixed at the center of the right side of helical gear 121. Helical gear 122 is rotatably connected to the right side of the upper surface of the housing 11. Helical gear 122 meshes with helical gear 121. A swing rod 123 is fixed to the upper surface of helical gear 122. A rotating rod 124 is fixed at the center of the lower surface of helical gear 122. The bottom end of the rotating rod 124 passes through the inside of the housing 11 and is fixed with a rotating wheel 125. The outer surface of the rotating wheel 125 is connected to the outer surface of the rotating ring 17. The rotating wheel 125 is rotatably connected to the partition 13. A fan 126 is installed at the bottom inside the air duct 19. When the rotating wheel 125 rotates with the transmission mechanism 2, the rotating ring 17 rotates, briefly connecting the upper and lower spaces inside the housing 11. Dust and debris brought in by the lowering transmission mechanism 2 are quickly discharged when the fan 126 is running.

[0036] The transmission mechanism 2 includes a turntable 21. The left side of the turntable 21 is located inside the bottom groove 12 and the box 11. A shaft 22 is fixed at the center of the upper surface of the turntable 21. Two incomplete gears 23 are fixed above the outer surface of the shaft 22. Two material grooves 24 are opened on the upper surface of the turntable 21. Side grooves 25 are symmetrically opened inside the material grooves 24. Electric slide rails 26 are provided inside the two side grooves 25. Telescopic rods 27 are slidably connected to the outer surface of the electric slide rails 26. Clamping seats 28 are fixed at the opposite ends of the two telescopic rods 27. The two clamping seats 28 together clamp the workpiece 5. The workpiece 5 includes but is not limited to chip materials. A motor 3 is fixed at the bottom of the transmission mechanism 2.

[0037] During operation, the blower 126 blows air into the housing 11 or expels air from inside the housing. Simultaneously, the motor 3 drives the transmission mechanism 2, allowing the workpiece 5 to enter the housing 11. As the turntable 21 rotates, the shaft 22 rotates, causing the two incomplete gears 23 to rotate. Under the transmission of helical gears 120 and 121, the rotating rod 124, and the rotating wheel 125, the rotating ring 17 rotates. At this time, the rotating through-slot 18 overlaps with through-slot 16, thus connecting the spaces previously isolated by the partition 13. The air flowing due to the blower 126 blows the workpiece 5 below or draws out dust and debris from its surface, preventing dust and other impurities from affecting subsequent processing. When rotation stops, through-slot 16 and through-slot 18 are no longer connected, leaving the workpiece 5 in a sealed space, reducing the impact of gas flow and other factors on laser welding. The operation of the laser welding equipment 14... Welding is performed on the surface of the workpiece 5, and the workpiece 5 is moved in conjunction with the electric slide rail 26 and the telescopic rod 27 to perform welding. At the same time, the fan 126 operates to cool the main body of the laser welding equipment 14 above the partition 13. The cold air flows out or enters through the air outlet 111 and the air duct 19, and is filtered by the filter screen to prevent dust and debris from entering the inside of the housing 11. After the filter screen is cleaned by the workpiece 5, the shaft 22 driven by the motor 3 and the two incomplete gears 23 alternately mesh with the helical gear 115. Thus, under the reciprocating rotation of the rotating shaft 114 and the spur gear 116, the toothed plate 119 and the slide rod 118 move up and down to clean the surface of the filter screen 112. At the same time, under the transmission of the two incomplete gears 23, the helical gear 120 and the helical gear 121 drive the swing rod 123 to swing back and forth to clean the filter screen 110, reducing the cleaning burden on personnel.

[0038] Preferably, adhesive strips 6 are fixed to opposite sides of the two slide rods 118, and the slide rods 118 are attached to the outer surface of the filter screen 112 through the adhesive strips 6; a pneumatic rod 61 is slidably connected to the lower part of the toothed plate 119, and the bottom of the pneumatic rod 61 is fixedly connected to the outer surface of the housing 11; an air inlet valve 62 is provided at the top of the toothed plate 119. The air inlet valve 62 is a one-way valve. When the toothed plate 119 moves upward, it creates negative pressure inside the toothed plate 119 and allows air to enter through the air inlet valve 62. The slide rods 118 approach the filter screen 112. Several swing wheels 63 are embedded in the upper and lower corners on one side. A nozzle 64 passes through the inside of the swing wheel 63. A worm gear 65 is fixed coaxially to the swing wheel 63. The swing wheel 63 and the worm gear 65 are rotatably connected to the slide rod 118. Two worms 66 are rotatably connected inside the slide rod 118. The worm gear 65 is meshed with the adjacent worm 66. The left ends of the two worms 66 pass through to the left side of the slide rod 118 and are fixed with transmission wheels 67. The outer surfaces of the two transmission wheels 67 are in contact with the outer surface of the air vent 111.

[0039] When the toothed plate 119 and slide bar 118 reciprocate up and down and clean the surface of filter screen 112, the air inside the toothed plate 119, which moves up and down, is squeezed by the fixed air pressure bar 61 and sprayed out through the nozzle 64 onto the surface of filter screen 112. At the same time, the two transmission wheels 67 move due to friction and drive the worm gear 66 to rotate axially. Thus, under the transmission of the worm wheel 65, the swing wheel 63 and the nozzle 64 swing left and right, thereby making the cleaning range of the jet airflow larger and improving the cleaning effect of the filter screen.

[0040] Preferably, the two incomplete gears 23 are staggered vertically, and the incomplete gears 23 are respectively meshed with helical gear 2 120 and helical gear 115. The two incomplete gears 23 can only mesh with a single helical gear 115 at the same time, and the helical gear 2 120 can only mesh with a single incomplete gear 23 at the same time, so that the helical gear 2 120 and helical gear 115 reciprocate when the shaft 114 rotates in a stable direction.

[0041] Preferably, a glass window 4 is fixed through the left side of the box 11, which allows for easy observation of the processing progress.

[0042] Working Principle: Pre-treatment of Workpieces and Environmental Cleaning: When motor 3 starts, transmission mechanism 2 begins to operate, and turntable 21 rotates accordingly, driving shaft 22 and two incomplete gears 23 fixed on it to rotate. Under the transmission action of helical gear 20, helical gear 3121, rotating rod 124, and rotating wheel 125, rotating ring 17 rotates synchronously. At this time, through groove 2 18 on rotating ring 17 and through groove 16 on spacer 13 briefly overlap and connect, and fan 126 continues to run, generating airflow that quickly blows on the surface of workpiece 5 or draws out dust and debris. This process is highly effective in the field of electronic chip manufacturing, effectively removing tiny particles generated on the chip surface during transportation and storage, preventing these impurities from mixing into the weld seam during welding, forming defects such as porosity and inclusions, greatly improving welding quality, and ensuring product reliability.

[0043] Stable Welding Environment Guarantee: When the workpiece 5 reaches the designated welding position, the turntable 21 stops rotating, and the rotating ring 17 also comes to a standstill. The first through-slot 16 and the second through-slot 18 are staggered and not connected, thus enclosing the workpiece 5 within a relatively stable space. In the field of laser welding, gas flow can interfere with the propagation path and energy distribution of the laser beam, leading to uneven heat distribution during welding and affecting the welding effect. This enclosed space design effectively reduces the interference of gas flow on welding, creating a stable working environment for the laser welding equipment 14, ensuring the stability of the welding process, and thus improving welding quality.

[0044] Welding Process and Workpiece Adjustment: The laser welding equipment 14 is started to perform welding operations on the workpiece 5. During the welding process, the electric slide rail 26 and the telescopic rod 27 work together to precisely adjust the position and orientation of the workpiece 5 according to a pre-set program or real-time monitoring of the welding situation. In the field of mechanical manufacturing, for welding complex-shaped parts, this flexible adjustment method of the device can ensure the accuracy of the welding position, improve welding precision, make the weld more uniform and beautiful, and enhance the structural strength and stability of the product.

[0045] Equipment heat dissipation and filter cleaning: During continuous operation, the fan 126 not only pre-treats and cleans the workpiece 5, but also provides air cooling for the main body of the laser welding equipment 14 located above the partition 13. Cool air enters the housing 11 through the air duct 19 and air outlet 111, carrying away the heat generated during equipment operation. The air is then discharged after being filtered by filters 110 and 112. During prolonged operation, dust gradually accumulates on the filters, affecting ventilation and heat dissipation. When the transmission mechanism 2 conveys and outputs the workpiece 5, the motor 3 drives the shaft 22 to rotate, and two incomplete gears 23 alternately mesh with helical gear 115. Driven by the rotating shaft 114 and spur gear 116, the toothed plate 119 drives the slide rod 118 to reciprocate up and down, cleaning the dust on the surface of the filter screen 112. Air inside the moving toothed plate 119 is compressed by the fixed pneumatic rod 61 and sprayed onto the surface of the filter screen 112 through the nozzle 64. Simultaneously, the two transmission wheels 67 move due to friction, axially driving the worm gear 66 to rotate. This, in turn, causes the swing wheel 63 and nozzle 64 to swing left and right under the drive of the worm wheel 65, thus expanding the cleaning range of the jet airflow and improving the cleaning effect of the filter screen. At the same time, the transmission between the incomplete gear 23 and the helical gears 120 and 121 causes the swing rod 123 to swing back and forth, cleaning the filter screen 110. This automatic cleaning mechanism reduces the frequency of manual cleaning, lowers labor costs, avoids poor heat dissipation due to untimely cleaning, extends the service life of the equipment, and improves production efficiency.

[0046] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A laser welding device for an air-cooled box-type unit, comprising an air-cooled unit (1) and a transmission mechanism (2), characterized in that: The air-cooled unit (1) includes a housing (11), a through-type bottom groove (12) is provided on the lower part of the outer surface of the housing (11), a partition (13) is fixed inside the housing (11), a laser welding device (14) is fixed through the middle of the partition (13), the laser head of the laser welding device (14) is located below the partition (13), an annular groove (15) is provided on the upper surface of the partition (13), a plurality of through-type first grooves (16) are provided on the lower surface inside the annular groove (15), a rotating ring (17) is rotatably connected inside the annular groove (15), and a plurality of through-type second grooves (18) are provided inside the rotating ring (17). The transmission mechanism (2) includes a turntable (21), the left side of which is located inside the bottom groove (12) and the box (11). A shaft (22) is fixed at the center of the upper surface of the turntable (21). Two incomplete gears (23) are fixed above the outer surface of the shaft (22). Two material grooves (24) are opened on the upper surface of the turntable (21). Side grooves (25) are symmetrically opened inside the material grooves (24). Electric slide rails (26) are provided inside the two side grooves (25). Telescopic rods (27) are slidably connected to the outer surface of the electric slide rails (26). Clamps (28) are fixed at the opposite ends of the two telescopic rods (27). The two clamps (28) together clamp the workpiece (5). A motor (3) is fixed at the bottom of the transmission mechanism (2). The air-cooled unit (1) also includes a duct (19). A helical gear three (121) is rotatably connected to the right side of the housing (11). A helical gear two (120) is fixed at the center of the right side of the helical gear three (121). A helical gear four (122) is rotatably connected to the right side of the upper surface of the housing (11). The helical gear four (122) meshes with the helical gear three (121). A swing rod (123) is fixed on the upper surface of the helical gear four (122). A rotating rod (124) is fixed at the center of the lower surface of the helical gear four (122). The bottom end of the rotating rod (124) penetrates into the interior of the housing (11) and is fixed with a rotating wheel (125). The rotating wheel (125) is rotatably connected to the partition (13). A fan (126) is installed at the bottom inside the duct (19). The two incomplete gears (23) are arranged alternately, one of which meshes with the second helical gear (120); The second through slot (18) is adapted to the first through slot (16); The outer surface of the rotating wheel (125) is connected to the outer surface of the rotating ring (17) in a transmission connection.

2. The laser welding device for an air-cooled box-type unit according to claim 1, characterized in that: The air duct (19) is fixed through the top of the box (11). A filter screen (110) is fixed inside the upper part of the air duct (19). Air inlets (111) are fixed through the front and rear surfaces of the box (11). A filter screen (112) is fixed inside the air inlets (111). Two brackets (113) are fixed on the right side of the box (11). A rotating shaft (114) is rotatably connected inside the brackets (113). A helical gear (115) is fixed at the opposite ends of the two rotating shafts (114). A spur gear (116) is fixed at the opposite ends of the two rotating shafts (114). A slide (117) is fixed on the front and rear surfaces of the box (11). A slide rod (118) is slidably connected inside the slide rod (117). A toothed plate (119) is fixed at the right end of the slide rod (118). The toothed plate (119) meshes with the adjacent spur gear (116); Another of the incomplete gears (23) meshes with the first helical gear (115).

3. The laser welding device for an air-cooled box-type unit according to claim 2, characterized in that: Two sliding rods (118) are fixed with adhesive strips (6) on opposite sides. The sliding rods (118) are attached to the outer surface of the filter screen (112) through the adhesive strips (6). A pneumatic rod (61) is slidably connected to the lower part of the toothed plate (119). The bottom of the pneumatic rod (61) is fixedly connected to the outer surface of the box (11). An air inlet valve (62) is provided on the top of the toothed plate (119). Several swing wheels (63) are embedded in the upper and lower corners of the sliding rod (118) near the filter screen (112). The swing wheels (63) are internally A nozzle (64) is inserted through the slide (63), and a worm gear (65) is coaxially fixed to the swing wheel (63). The swing wheel (63) and the worm gear (65) are rotatably connected to the slide rod (118). Two worms (66) are rotatably connected inside the slide rod (118). The worm gear (65) meshes with the adjacent worm (66). The left ends of the two worms (66) extend to the left side of the slide rod (118) and are fixed with transmission wheels (67). The outer surfaces of the two transmission wheels (67) are in contact with the outer surface of the air vent (111).

4. The laser welding device for an air-cooled box-type unit according to claim 1, characterized in that: A glass window (4) is fixed through the left side of the box (11).

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