Machining equipment and machining method for laser welding of longitudinal finned tubes

Abstract

The invention relates to the technical field of longitudinal finned tube processing, and discloses a processing device for laser welding of longitudinal finned tubes, which comprises a workbench and a placing rod, the outer side of the placing rod is sleeved with a finned tube, the workbench is provided with a moving frame, a clamping frame and a laser welding gun are arranged below the moving frame, and the clamping frame and the laser welding gun are arranged below the moving frame. A clamping roller is arranged in the clamping frame, a downward pressing assembly is arranged in the moving frame, when the downward pressing assembly moves downwards, the clamping roller is driven by the clamping frame to clamp the fins, the clamping roller enables the fins to be kept in a flat state in the moving process of the moving frame, and the fins are not twisted when moving. The clamping rollers can slide on the two sides of the fins while clamping the fins, it is guaranteed that the fins are perpendicular to the surfaces of the finned tubes all the time in the whole welding process, distortion of the fins is effectively prevented, gaps between the fins and the finned tubes are avoided, the welding quality of the longitudinal finned tubes is greatly improved, and the reject ratio is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of longitudinal fin tube processing, in particular to processing equipment and a processing method for laser welding longitudinal fin tubes. Background Art

[0002] Finned tube is a heat exchange element. In order to improve the heat exchange efficiency, evenly distributed longitudinal fins are usually welded on the surface of the heat exchange tube to increase the outer surface area (or inner surface area) of the heat exchange tube, thereby achieving the purpose of improving the heat exchange efficiency. During the processing of finned tube, a laser welding device is required to weld the fins to the heat exchange tube.

[0003] Before using laser to weld the longitudinal fin tube, the fins are usually clamped at both ends or at a certain distance on the upper side. During the welding process of the laser welding gun, the other parts of the fins that are not clamped are prone to distortion and deformation, and the fins are prone to shaking during the welding movement. This can easily lead to inaccurate relative positions of the fins and the fin tubes during welding, and gaps are easily generated at the welding points, which will reduce the overall strength and sealing of the longitudinal fin tubes. Summary of the invention

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

[0005] Technical Solution The present invention provides the following technical solutions: a processing equipment for laser welding longitudinal fin tubes, comprising a workbench and a placing rod, a fin tube is sleeved on the outer side of the placing rod, a moving frame is arranged on the workbench, a clamping frame and a laser welding gun are arranged below the moving frame, a clamping roller is arranged on the clamping frame, and a pressing assembly is arranged on the moving frame. When the pressing assembly moves downward, the clamping roller drives the clamping frame to clamp the fin, and during the movement of the moving frame, the clamping roller prompts the fin to remain flat, and the fin is not twisted when moving. At the same time, when the fin is welded to the fin tube, it is always in contact with the fin tube and perpendicular to the fin tube.

[0006] Preferably, the pressing assembly includes a rack column and a first piston plate, a first motor, a first piston chamber and a second piston chamber are arranged in the moving frame, the first piston chamber and the second piston chamber are connected to each other, the bottom end of the first piston plate is fixedly connected to the clamping frame, and a push rod is arranged on the side of the first piston plate.

[0007] Preferably, a second piston plate and a first spring are arranged inside the second piston chamber, a first connecting pipe is arranged on the side of the second piston chamber, a piston cylinder is arranged below the movable frame, and the first connecting pipe is communicated with the piston cylinder.

[0008] Preferably, the bottom end of the first piston plate is fixedly connected to the clamping frame, and a partition, a first rotating gear and a sliding rod are provided in the clamping frame. A second connecting pipe is provided in the first piston chamber and connected to the clamping frame. A third piston plate is provided on the partition, and the third piston plate and the sliding rod are both meshed and connected to the first rotating gear, and the sliding rod is fixedly connected to the clamping roller below.

[0009] Preferably, the workbench is also provided with a column, a fixed frame is provided in the column, a placement plate and a third spring are provided in the fixed frame, a pin shaft and a bevel groove are provided on the placement plate, a pin column is provided in the pin shaft, a clamping block is provided at one end of the pin column, and the clamping block and the placement plate clamp the fin.

[0010] Preferably, a sliding plate and a second spring are provided on the fixed frame, an inclined block is provided on the sliding plate, and the inclined block is located above the pin.

[0011] Preferably, the push rod is located above the sliding plate, and the sliding plate drives the inclined block to move downward to contact the inclined edge groove, thereby driving the placement plate and the clamping block to separate from the fin.

[0012] Preferably, a second motor and a lead screw are provided on the column, and the moving frame is provided outside the lead screw.

[0013] Preferably, a transmission belt is arranged on the outer side of the second motor output shaft, a second rotating gear is arranged on the outer side of the placement rod, a local gear part is arranged on the inner ring side of the transmission belt, and is meshed and connected with the second rotating gear through the gear part.

[0014] A processing method for laser welding longitudinal fin tube processing equipment, comprising the following steps: Step 1: The first motor drives the first piston plate to move downward, and drives the clamping roller to clamp the fin on the placement plate through the clamping frame; Step 2: The first piston chamber moves downward, and the push rod drives the inclined block downward to rotate the pin 90 degrees. The inclined block enters the inclined groove and drives the placement plate to separate from the fin; Step 3: The second motor drives the clamping frame to move horizontally through the lead screw. The clamping frame drives the clamping roller to move on the fin while driving the laser welding gun to weld the fin to the fin tube.

[0015] Beneficial Effects Compared with the prior art, the present invention provides a processing device and a processing method for laser welding longitudinal fin tubes, which have the following beneficial effects: 1. In the present invention, the fins can be clamped by the clamping roller while sliding on both sides of the fins, ensuring that the fins are always perpendicular to the surface of the fin tube during the entire welding process, effectively preventing the fins from twisting and deforming, avoiding the appearance of gaps between the fins and the fin tubes, greatly improving the welding quality of the longitudinal fin tubes, and reducing the defective rate.

[0016] 2. In the present invention, the movable frame drives the clamping roller and the laser welding gun to move, and the clamping roller ensures that the fin is in a flat state, so that the laser welding gun can stably weld the fin and the fin tube, further ensuring the stability of the welding quality.

[0017] 3. In the present invention, the clamping roller is driven by the pressing assembly to stably clamp the fin and move to the fin tube, thereby ensuring the accurate clamping and positioning of the fin before processing and improving the accuracy and stability of processing.

[0018] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. This application document provides an overview of various implementations or examples of the technology described in the present disclosure, and is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a front view of the overall structure of the present invention; Figure 2 It is a side view of the movable frame, the laser welding gun and the clamping frame of the present invention; Figure 3 This is a schematic diagram of the position of the push rod of the present invention; Figure 4 It is a cross-sectional view of the upper half of the movable frame of the present invention; Figure 5 A connection diagram of the first piston chamber and the second piston chamber in the movable frame of the present invention; Figure 6 This is an internal diagram of the clamping frame of the present invention; Figure 7 This is a first perspective view of the fin placement assembly of the present invention; Figure 8 A second viewing angle diagram of the fin placement assembly of the present invention; Fig. 9 It is a schematic diagram of the positions of fins and fin tubes of the present invention; Fig.10 This is a working diagram of the fin tube angle rotation of the present invention.

[0021] Description of reference numerals: Fins will be on fin tubes In the figure: 1. workbench; 2. column; 3. fin tube; 4. lead screw; 5. moving frame; 6. clamping frame; 7. laser welding gun; 8. placement plate; 9. clamping roller; 10. first connecting pipe; 11. piston cylinder; 12. push rod; 13. first motor; 14. rack column; 15. first piston plate; 16. first piston chamber; 17. second piston chamber; 18. second piston plate; 19. first spring; 20. partition; 21. third piston plate; 22. first rotating gear; 23. sliding rod; 24. fixed frame; 25. sliding plate; 26. second spring; 27. pin shaft; 28. pin column; 29. ​​bevel groove; 30. clamping block; 31. third spring; 32. bevel block; 33. placement rod; 34. second motor; 35. second rotating gear; 36. transmission belt. DETAILED DESCRIPTION

[0022] 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.

[0023] Example: See also Figure 1-Figure 10 The present invention provides a technical solution: a processing equipment for laser welding longitudinal fin tubes, comprising a workbench 1 and a placing rod 33, the placing rod 33 is sleeved with a fin tube 3 on the outside, the placing rod 33 is slidably installed in a column 2, a moving frame 5 is arranged on the workbench 1, a clamping frame 6 and a laser welding gun 7 are movably installed below the moving frame 5, a clamping roller 9 is slidably installed below the clamping frame 6, a pressing component is arranged in the moving frame 5, when the pressing component moves downward, the clamping roller 9 will drive the clamping frame 6 to clamp the fin, and during the movement of the moving frame 5, the clamping roller 9 will cause the fin to keep a flat state, and the fin will not be twisted when moving, and at the same time, when the fin is welded with the fin tube 3, it is always in contact with the fin tube 3 and is perpendicular to the fin tube 3.

[0024] In this embodiment, the pressing assembly includes a rack column 14 and a first piston plate 15, the rack column 14 is fixedly connected to the first piston plate 15, a first motor 13 is fixedly installed in the moving frame 5, and a first piston chamber 16 and a second piston chamber 17 are opened, the first piston chamber 16 and the second piston chamber 17 are connected to each other, the volume of the first piston chamber 16 is greater than the volume of the second piston chamber 17, the bottom end of the first piston plate 15 passes through the bottom inner wall of the moving frame 5 and is fixedly connected to the clamping frame 6, and a push rod 12 is fixedly installed on the side of the first piston plate 15 located below the moving frame 5.

[0025] A third rotating gear is fixedly installed on the output shaft end of the first motor 13, and is meshed with the rack column 14. When the first motor 13 is working, the rack column 14 will be driven to move through the third rotating gear. When the rack column 14 moves, it will drive the first piston plate 15 to move. When the first piston plate 15 moves downward, it will drive the clamping frame 6 and the push rod 12 to move downward. At the same time, the first piston plate 15 will also squeeze the gas in the first piston chamber 16 into the second piston chamber 17, and at the same time, the gas in the first piston chamber 16 will enter the clamping frame 6 through the second connecting pipe.

[0026] In this embodiment, a second piston plate 18 and a first spring 19 are provided inside the second piston chamber 17, the bottom end of the second piston plate 18 is fixedly connected to the first spring 19, and a first connecting pipe 10 is provided on the side of the second piston chamber 17, and the air inlet position of the first connecting pipe 10 in the second piston chamber 17 is lower than the initial position of the second piston plate 18 and the first spring 19, that is, when the first spring 19 is in an inoperative state, the second piston plate 18 will block the air inlet of the first connecting pipe 10, and only when the second piston plate 18 moves down enough, will the gas in the second piston chamber 17 enter the first connecting pipe 10 and enter the piston cylinder 11, a piston cylinder 11 is provided below the movable frame 5, the first connecting pipe 10 is connected to the piston cylinder 11, the top of the laser welding gun 7 is located in the piston cylinder 11, and after the gas in the first connecting pipe 10 enters the piston cylinder 11, the laser welding gun 7 can be pushed down to the welding point between the fin and the fin tube 3.

[0027] When the first motor 13 is working, it will drive the rack column 14 to move downward. When the rack column 14 moves downward, it will drive the first piston plate 15 to move downward in the first piston chamber 16, and will drive the clamping frame 6 and the push rod 12 to move downward together. When the gas in the first piston chamber 16 is squeezed by the downward movement of the first piston plate 15, a part of the gas will squeeze into the second piston chamber 17. This part of the gas will push the second piston plate 18 and the first spring 19 in the second piston chamber 17, so that the gas in the second piston chamber 17 can enter the piston cylinder 11 through the first connecting pipe 10, adjust the laser welding gun 7 to move down to the welding point between the fin and the fin tube 3, and the other part will enter the clamping frame 6, so that the clamping roller 9 in the clamping frame 6 can clamp the fin and move the fin to the fin tube 3.

[0028] In this embodiment, the bottom end of the first piston plate 15 is fixedly connected to the clamping frame 6, a partition 20 is fixedly installed in the clamping frame 6, and a first rotating gear 22 and a sliding rod 23 are slidably installed. A second connecting pipe is provided in the first piston chamber 16 and is connected to the clamping frame 6. The second connecting pipe directly extends into the inner cavity of the clamping frame 6. The second connecting pipe can drive the movement of the clamping roller 9 below the clamping frame 6 when the first piston chamber 16 is squeezed downward by the first piston plate 15. A third piston plate 21 is provided on the partition 20. The third piston plate 21 and the sliding rod 23 are both meshed and connected with the first rotating gear 22. The third piston plate 21 and the sliding rod 23 are both provided with tooth columns matching the first rotating gear 22 on the side close to the first rotating gear 22, and the sliding rod 23 is fixedly connected to the clamping roller 9 below.

[0029] After part of the gas in the first piston chamber 16 enters the clamping frame 6 through the second connecting pipe, it will gather between the partition 20, the third piston plate 21 and the inner wall of the clamping frame 6. As the gas increases, the third piston plate 21 will be squeezed and moved, and the sliding rod 23 will be driven to move through the first rotating gear 22. When the sliding rod 23 moves, it will drive the clamping roller 9 to clamp the fin, and move to the fin tube 3 as the clamping frame 6 moves downward.

[0030] In this embodiment, two columns 2 are also provided on the workbench 1, one column 2 is fixedly installed on the workbench 1, and the other column 2 is slidably installed on the workbench 1 through a roller, a fixed frame 24 is provided in the column 2, and a placement plate 8 and a third spring 31 are movably installed in the fixed frame 24, and the placement plate 8 is located in the fixed frame 24. The part of the placement plate 8 is fixedly connected with the third spring 31, a pin shaft 27 is fixedly installed on the placement plate 8, and a bevel groove 29 is opened through the placement plate 8, a pin column 28 is movably installed in the pin shaft 27, and a clamping block 30 is fixedly installed at one end of the pin column 28, the clamping block 30 is in contact with the fin, and the clamping block 30 and the placement plate 8 clamp the fin, the pin column 28 can rotate on the pin shaft 27, and can rotate 90°, and when the pin column 28 rotates 90°, the clamping block 30 will also rotate 90° with the pin column 28, and be perpendicular to the placement plate 8, and at the same time parallel to the inclined block 32.

[0031] In this embodiment, a sliding plate 25 is movably mounted on the fixed frame 24, and a second spring 26 is fixedly mounted thereon. The sliding plate 25 is located above the second spring 26, and the two are fixedly connected. At the same time, the push rod 12 contacts the upper surface of the sliding plate 25, and an inclined block 32 is fixedly mounted at the bottom end of the sliding plate 25. The inclined block 32 is located above the pin 28. When the push rod 12 moves downward, the sliding plate 25 is driven downward, and the inclined block 32 is driven downward at the same time. During the downward movement of the inclined block 32, the pin 28 is driven to rotate around the pin shaft 27 and enter the bevel groove 29, and the placement plate 8 is driven to move horizontally through the cooperation of the bevel groove 29.

[0032] In this embodiment, the push rod 12 is located above the sliding plate 25, and drives the inclined block 32 to move downward and contact the inclined edge groove 29 through the sliding plate 25, driving the placement plate 8 and the clamping block 30 to separate from the fin, and the inclined block 32 moves downward into the inclined edge groove 29, so that the placement plate 8 can be closer to the side of the column 2.

[0033] In this embodiment, a second motor 34 and a lead screw 4 are provided on the column 2, and a moving frame 5 is provided on the outside of the lead screw 4. When the fin moves to the processing position of the fin tube 3, the second motor 34 will be started, and the moving frame 5 will be driven to move horizontally through the lead screw 4. When the moving frame 5 moves, the clamping roller 9 will be driven to move on the fin, and the laser welding gun 7 will be driven to weld the fin and the fin tube 3.

[0034] In this embodiment, a transmission belt 36 is provided on the outer side of the output shaft of the second motor 34, and a second rotating gear 35 is provided on the outer side of the placement rod 33. A partial gear portion is provided on the inner ring side of the transmission belt 36, and is meshed and connected with the second rotating gear 35 through the gear portion. When the second motor 34 rotates, it can drive the transmission belt 36 to rotate, and when the transmission belt 36 rotates, it will also drive the second rotating gear 35 to rotate through the gear portion, thereby driving the placement rod 33 to rotate. Only then will the placement rod 33 rotate a certain angle, and this angle changes to the angle between two adjacent fins on the fin tube 3. In this way, when one fin is welded on the fin tube 3, the fin tube 3 will rotate to provide a position for the welding of the next fin.

[0035] The lead screw 4 is a bidirectional screw, which drives the transmission belt 36 to rotate when it rotates forward, but does not drive the transmission belt 36 to rotate when it rotates reversely.

[0036] When welding the fins and the fin tube 3, another column 2 is located outside the screw 4 and will move on the workbench 1 as the screw 4 rotates. After the fins are welded on the fin tube 3, the screw 4 will continue to rotate for a distance so that the transmission belt 36 can drive the placement rod 33 to rotate through the second rotating gear 35.

[0037] Below the movable frame 5 and in the forward direction of welding the fins and the fin tubes 3, the clamping roller 9 is located in front of the laser welding gun 7. The clamping roller 9 and the laser welding gun 7 are not located in the same straight line plane, preventing the clamping roller 9 from obstructing the laser welding gun 7 during welding.

[0038] A stabilizing block is provided inside the placement rod 33. When the fin tube 3 is sleeved on the placement rod 33, the stabilizing block in the placement rod 33 will fix the fin tube 3 to prevent the fin tube 3 from rotating on the placement rod 33. It should be noted that this technology is well known in the market.

[0039] The clamping roller 9 adopts a pulley. The clamping roller 9 can not only clamp the fin, but also slide on both sides of the fin. When the clamping roller 9 slides on both sides of the fin, it can ensure that the fin always remains perpendicular to the surface of the fin tube 3, prevent the fin from twisting, avoid gaps between the fin and the fin tube 3, ensure the welding quality of the longitudinal fin tube 3, and reduce the defective rate.

[0040] A processing method for laser welding longitudinal fin tube processing equipment, comprising the following steps: Step 1: The first motor 13 drives the first piston plate 15 to move downward, and drives the clamping roller 9 to clamp the fins on the placement plate 8 through the clamping frame 6; Step 2: The first piston chamber 16 moves downward, and the push rod 12 drives the inclined block 32 to move downward, so that the pin 28 rotates 90 degrees, and the inclined block 32 enters the inclined groove 29 to drive the placement plate 8 to separate from the fin; Step three: The second motor 34 works to drive the clamping frame 6 to move horizontally through the lead screw 4. The clamping frame 6 drives the clamping roller 9 to move on the fin and drives the laser welding gun 7 to weld the fin to the fin tube 3.

[0041] Working principle of this embodiment: when welding the longitudinal fin tube 3, the fin is located on the placement plate 8, the first motor 13 in the moving frame 5 will be started, and the first piston plate 15 will be driven to move downward in the first piston chamber 16 through the rack column 14. As the first piston plate 15 moves downward, it will not only drive the push rod 12 to move downward, but also the gas in the first piston chamber 16 will be divided into two parts, one part will enter the second piston chamber 17, and the other part will enter the clamping frame 6 through the second connecting pipe. The gas entering the clamping frame 6 will push the third piston plate 21 to move, and drive the sliding rod 23 to move through the first rotating gear 22, and the movement directions of the third piston plate 21 and the sliding rod 23 are opposite, so that the two sliding rods 23 will drive the two clamping rollers 9 to clamp the fins when moving. At the same time, when the push rod 1 When the sliding plate 25 moves downward, it will drive the sliding plate 25 to move downward together, and at the same time squeeze the second spring 26. When the sliding plate 25 moves downward, it will also drive the inclined block 32 to move downward, and will drive the pin 28 to rotate around the pin shaft 27 through the inclined block 32. When the inclined block 32 moves down to the bevel groove 29, the pin 28 will drive the clamping block 30 to separate from the end of the fin and rotate 90° to be parallel to the inclined block 32. As the inclined block 32 continues to move downward in the bevel groove 29, the inclined block 32 will drive the placement plate 8 to move toward the side of the column 2 through the bevel groove 29, so that the placement plate 8 is separated from the bottom end of the fin. At the same time, the clamping roller 9 just clamps the fin. As the clamping frame 6 continues to move downward, the fin will contact the top end of the fin tube 3, and the fin will be in vertical contact with the fin tube 3, which is convenient for the laser welding gun 7 to weld the fin on the fin tube 3.

[0042] The gas entering the second piston chamber 17 will squeeze the second piston plate 18, and the second piston plate 18 will squeeze the first spring 19. As the second piston plate 18 moves, the air inlet end of the first connecting pipe 10 will be exposed, and the gas in the second piston chamber 17 will enter the piston cylinder 11 through the first connecting pipe 10 to drive the laser welding gun 7 to move downward and move to the welding point between the fin and the fin tube 3.

[0043] When welding is performed, the second motor 34 drives the lead screw 4 to rotate and drives the moving frame 5 to move. When the moving frame 5 moves, it drives the clamping roller 9 and the laser welding gun 7 to move together. The clamping roller 9 moves on the fins. Since the clamping roller 9 moves on a straight line with the moving frame 5, the fins between the clamping rollers 9 will also be located on the same straight line. That is, the clamping roller 9 can ensure that the fins always remain flat during welding, prevent the fins from twisting, and prevent gaps from forming between the fin tubes 3 and the fins due to twisting.

[0044] When the lead screw 4 rotates, it will always drive the transmission belt 36 to rotate together. After the laser welding gun 7 welds the fin to the fin tube 3, the lead screw 4 continues to rotate. At this time, the transmission belt 36 will drive the second rotating gear 35 to rotate through its internal gear part, and then drive the placement rod 33 to rotate. The rotation angle of the placement rod 33 is the angle between two adjacent fins on the fin tube 3. After the placement rod 33 rotates this angle, the second motor 34 will drive the lead screw 4 to reverse, while the transmission belt 36 will not reverse. The lead screw 4 will drive the moving frame 5 back to its original position and continue to weld the next fin to the fin tube 3.

[0045] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A processing device for laser welding longitudinal finned tubes, comprising a workbench and a placement rod, wherein the finned tubes are sleeved on the outer side of the placement rod, and characterized in that: A moving frame is arranged on the workbench, a clamping frame and a laser welding gun are arranged below the moving frame, a clamping roller is arranged on the clamping frame, and a pressing assembly is arranged on the moving frame. When the pressing assembly moves downward, the clamping roller drives the clamping frame to clamp the fin, and the clamping roller causes the fin to remain flat during the movement of the moving frame, and the fin is not twisted when moving. At the same time, when the fin is welded to the fin tube, it is always in contact with the fin tube and perpendicular to the fin tube.

2. The processing equipment for laser welding longitudinal finned tubes according to claim 1, characterized in that: The pressing assembly includes a rack column and a first piston plate. The moving frame is provided with a first motor, a first piston chamber and a second piston chamber. The first piston chamber and the second piston chamber are connected to each other. The bottom end of the first piston plate is fixedly connected to the clamping frame, and a push rod is provided on the side of the first piston plate.

3. The processing equipment for laser welding longitudinal fin tubes according to claim 2 is characterized in that: A second piston plate and a first spring are arranged inside the second piston chamber, and a first connecting pipe is arranged on the side of the second piston chamber. A piston cylinder is arranged below the moving frame, and the first connecting pipe is communicated with the piston cylinder.

4. The processing equipment for laser welding longitudinal finned tubes according to claim 2, characterized in that: The bottom end of the first piston plate is fixedly connected to the clamping frame, and a partition, a first rotating gear and a sliding rod are arranged in the clamping frame. A second connecting pipe is arranged in the first piston chamber and is connected to the clamping frame. A third piston plate is arranged on the partition, and the third piston plate and the sliding rod are both meshed and connected with the first rotating gear, and the sliding rod is fixedly connected to the clamping roller below.

5. The processing equipment for laser welding longitudinal fin tubes according to claim 2, characterized in that: The workbench is also provided with a column, a fixing frame is provided in the column, a placement plate and a third spring are provided in the fixing frame, a pin shaft and a bevel groove are provided on the placement plate, a pin column is provided in the pin shaft, a clamping block is provided at one end of the pin column, and the clamping block and the placement plate clamp the fin.

6. The processing equipment for laser welding longitudinal fin tubes according to claim 5, characterized in that: The fixed frame is provided with a sliding plate and a second spring, the sliding plate is provided with an inclined block, and the inclined block is located above the pin.

7. The processing equipment for laser welding longitudinal fin tubes according to claim 6, characterized in that: The push rod is located above the sliding plate, and drives the inclined block to move downward and contact the inclined edge groove through the sliding plate, thereby driving the placement plate and the clamping block to separate from the fin.

8. The processing equipment for laser welding longitudinal fin tubes according to claim 1, characterized in that: The column is provided with a second motor and a lead screw, and the moving frame is provided outside the lead screw.

9. The processing equipment for laser welding longitudinal fin tubes according to claim 8, characterized in that: A transmission belt is arranged on the outside of the output shaft of the second motor, a second rotating gear is arranged on the outside of the placement rod, a local gear part is arranged on the inner ring side of the transmission belt, and is meshed and connected with the second rotating gear through the gear part.

10. A processing method of a processing device for laser welding longitudinal finned tubes, which is based on the processing device for laser welding longitudinal finned tubes according to any one of claims 1 to 9, characterized in that: The following steps are included: Step 1: The first motor drives the first piston plate to move downward, and drives the clamping roller to clamp the fin on the placement plate through the clamping frame; Step 2: The first piston chamber moves downward, and the push rod drives the inclined block downward to rotate the pin 90 degrees. The inclined block enters the inclined groove and drives the placement plate to separate from the fin; Step 3: The second motor drives the clamping frame to move horizontally through the lead screw. The clamping frame drives the clamping roller to move on the fin while driving the laser welding gun to weld the fin to the fin tube.

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