Welding tool for finned tube machining

Abstract

The invention relates to the field of finned tube machining, and discloses a welding tool for finned tube machining, which comprises a workbench, an external welding structure is arranged in the middle of the workbench, two connecting blocks are connected to the rear surface of the workbench, a vertical plate is arranged on the rear side surfaces of the connecting blocks, two cross rods are arranged on the vertical plate through a driving structure, and the two cross rods are connected with the external welding structure. A first inserting rod and a second inserting rod are arranged on the two transverse rods through first transmission structures correspondingly, an internal welding structure is arranged at one end of the first inserting rod, a second transmission structure is arranged in the middle of the front side face of the vertical plate, and supporting bases are fastened to the left side and the right side of the upper face of the workbench through screws correspondingly; according to the finned tube welding device, the supporting base is installed on the base, the containing base is installed on the supporting base, the pressing and limiting structure is arranged on the containing base, and when two finned tubes are welded, welding can be conducted from the interiors and the exteriors of the finned tubes at the same time, so that welding between the finned tubes is firmer, and the service life of the finned tubes is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of fin tube processing, in particular to a welding tool used for fin tube processing. Background Art

[0002] Automotive finned tubes are core heat exchange components in automotive air conditioning systems, primarily used to enhance air-side heat exchange efficiency. Their structure is achieved by mechanically rolling low-profile fins onto the outer surface of the tube, creating a seamless, integrated structure that significantly expands the heat transfer area and reduces contact thermal resistance. Welding tooling is used during the processing of automotive finned tubes. The welding tool in the prior art generally places and fixes two fin tubes on a placement seat, and welds the two fin tubes by rotating the welding gun. However, in actual operation, the welding tool in the prior art only performs welding work on the outer side surfaces of the two fin tubes, resulting in the need to improve the firmness of the welding between the fin tubes. The firmness of the welding between the fin tubes is related to the production quality of the automobile. Therefore, there is room for improvement. Summary of the Invention

[0003] In order to solve the problems raised in the above background technology, the present invention provides a welding tool for fin tube processing.

[0004] The present invention provides a welding tool for fin tube processing that adopts the following technical solutions: A welding tool for processing fin tubes, comprising a workbench, an external welding structure is provided in the middle of the workbench, two connecting blocks are connected to the rear of the workbench, a vertical plate is provided on the rear side of the connecting block, two cross bars are provided on the vertical plate through a driving structure, a first insertion rod and a second insertion rod are provided on the two cross bars respectively through a first transmission structure, an internal welding structure is provided at one end of the first insertion rod, a second transmission structure is provided in the middle of the front side of the vertical plate, support seats are fastened with screws on the left and right sides of the workbench, a placement seat is installed on the support seat, and a pressing and limiting structure is provided on the placement seat; The external welding structure includes a middle groove opened in the middle of the workbench, the inner walls of the front and rear sides of the middle groove are connected to support plates, the tops of the two support plates are installed with fixed rings, the inner walls of the fixed rings are rotatably provided with a swivel, and the inner wall of the swivel is radially provided with two external welding guns; The internal welding structure includes an end sleeve fixedly sleeved on one end of the first insertion rod, and the first insertion rod and the second insertion rod are both provided with a tight limiting structure at one end away from each other. A first fixing ring is fixedly sleeved on the end sleeve, and two inner welding guns are installed on the first fixing ring along its radial direction. The first insertion rod and the second insertion rod are both provided with a scraping structure at one end close to each other, and a cleaning structure is provided on the end sleeve and the second insertion rod.

[0005] Preferably, the scraping structure includes a scraper fixedly arranged on one end of the first insertion rod and the second insertion rod, the side surface of the scraper is in contact with the inner wall of the fin tube, and a collection frame is arranged in the workbench.

[0006] Preferably, the cleaning structure includes a second fixing ring fixedly mounted on the end sleeve and the second insertion rod, a plurality of cleaning blocks are connected to the side of the second fixing ring, each of the cleaning blocks is provided with bristles, and a blocking frame is provided on the end sleeve between the second fixing ring and the first fixing ring, and a blocking net is installed on the blocking frame.

[0007] Preferably, the driving structure includes a through slot opened on the vertical plate, and a bidirectional screw is rotatably connected between the groove walls at both ends of the through slot, and the left and right sections of the bidirectional screw have opposite thread directions, and two moving blocks are sleeved on the bidirectional screw, and each of the moving blocks is connected to a fixed block at the front side surface of the fixed block, and the middle part of the fixed block rotates through the rotating drum, and the cross bar is fixed through the rotating drum, and the fixed block is connected to the U-shaped plate, and the cross bar rotates through the U-shaped plate, and the side surface of the U-shaped plate away from the fixed block is connected to the L-shaped plate, one end of the L-shaped plate is connected to the side plate, and the cross bar rotates through the side plate, and the first insertion rod and the second insertion rod rotate through the two side plates respectively, and a first motor is installed on one side of the vertical plate, and one end of the output shaft of the first motor is connected to the bidirectional screw.

[0008] Preferably, the first transmission structure includes a first pulley mounted on the end of the cross bar away from the fixed block, and a second pulley is mounted on the ends of the first insertion rod and the second insertion rod away from each other, and a belt is tightly mounted between the first pulley and the second pulley.

[0009] Preferably, the second transmission structure includes a fixed frame fastened by bolts in the middle of the front side of the vertical plate, the fixed frame rotates through the first rotating shaft, the first rotating shaft is fixedly sleeved with a first gear, a second motor is installed on one side of the fixed frame, the output shaft of the second motor is inserted into the fixed frame and the second gear is sleeved on one end, the second gear is meshed with the first gear, both ends of the first rotating shaft are connected with a rotating plate, the end face of the rotating plate is in the positive direction, the rotating plate is movably inserted into a slot opened on the end face of the cross bar, and a third transmission structure is arranged between the first gear and the rotating ring.

[0010] Preferably, the third transmission structure includes a vertical frame fastened to the workbench by screws, and the vertical frame rotates through the second rotating shaft near the top, and a fourth gear is fixedly sleeved on the middle of the second rotating shaft, and the fourth gear is meshed with the first gear. The third gear is sleeved at both ends of the second rotating shaft, and gear rings are fixedly sleeved at both ends of the rotating ring, and the teeth on the gear ring are meshed with the third gear.

[0011] Preferably, the tightening and limiting structure includes a screw barrel fixedly sleeved on the first insertion rod and the second insertion rod at one end away from each other, a screw sleeve is sleeved on the screw barrel, a moving ring is rotatably installed on one end of the screw sleeve, a plurality of connecting rods are connected to the side of the moving ring, a tightening cover is installed on one end of the connecting rod, a plurality of limiting blocks are arranged on the inner wall of the tightening cover, and the first insertion rod and the second insertion rod are both provided with limiting grooves for the limiting blocks to be movably inserted.

[0012] Preferably, the clamping and limiting structure includes a clamping frame rotatably mounted on the placement seat, a U-shaped block is provided on the rear side of the placement seat, the clamping frame is inserted into the U-shaped block, and the clamping frame and the U-shaped block are movable through positioning pins.

[0013] In summary, the present invention has the following beneficial technical effects: 1. The present invention provides an internal welding structure and an external welding structure. When welding two fin tubes, welding can be performed from the inside and outside of the fin tubes at the same time, making the welding between the fin tubes more firm and extending the service life of the fin tubes. 2. The present invention provides a driving structure to drive the first insertion rod and the second insertion rod to move, thereby conveniently driving the inner welding gun on the first insertion rod to move into the fin tube for internal welding. When the tool is not in use, the first insertion rod and the second insertion rod can also be driven to move toward the middle, thereby reducing the space occupied by the tool and facilitating storage. 3. The present invention provides a first transmission structure, a second transmission structure, and a third transmission structure. Under the action of the second transmission structure, the first transmission structure and the third transmission structure can respectively drive the first insertion rod and the second insertion rod to rotate, and drive the rotating ring to rotate, thereby automatically driving the inner welding gun and the outer welding gun to perform rotary welding, thereby performing comprehensive welding on the fin tube and improving the welding quality. 4. The present invention provides a cleaning structure and a scraping structure. When the first insertion rod and the second insertion rod are removed, the cleaning structure can automatically clean the inner wall of the fin tube after welding, and the scraping structure can remove impurities in the cleaning area of ​​the fin tube, thereby facilitating the cleaning of the fin tube. 5. The present invention provides a pressing and limiting structure and a compression and limiting structure. After the first insertion rod and the second insertion rod are inserted into the fin tube, they can drive the pressing and limiting structure to press against the end of the fin tube, and the fin tube is pressed and limited during welding, thereby avoiding the problem of position displacement of the fin tube during the welding process; the setting of the compression and limiting structure can perform compression and limiting work on the fin tube when the first insertion rod and the second insertion rod are removed, thereby avoiding the problem of the fin tube being directly pulled off the placement seat when the scraping structure moves close to the inner wall of the fin tube and brings out impurities. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 11 is a structural schematic diagram of a welding tool for processing fin tubes according to an embodiment of the present invention; Figure 2 2 is a schematic structural diagram of a workbench in an embodiment of the present invention; Figure 3 In the embodiment of the present invention Figure 1 A magnified view of the structure at point A; Figure 4 is a structural diagram of a vertical plate in an embodiment of the present invention; Figure 5 In the embodiment of the present invention Figure 4 A magnified view of the structure at point B; Figure 6 is a schematic structural diagram of the rear side of the vertical plate in an embodiment of the present invention; Figure 7 This is a structural diagram of the internal and external welding structures in an embodiment of the present invention; Figure 8 2 is a schematic structural diagram of the first insertion rod and the second insertion rod in an embodiment of the present invention; Figure 9 In the embodiment of the present invention Figure 8 Enlarged view of the structure at point C.

[0015] Explanation of reference numerals: 1. workbench; 2. support base; 3. placement base; 4. middle groove; 5. support plate; 6. fixing ring; 7. swivel; 8. outer welding gun; 9. connecting block; 10. vertical plate; 11. cross bar; 12. side plate; 13. first insertion rod; 14. second insertion rod; 15. first fixing ring; 16. inner welding gun; 17. scraper; 18. collection frame; 19. second fixing ring; 20. cleaning block; 21. bristles; 22. barrier frame; 23. baffle; 24. end sleeve; 25. through slot; 26. first motor; 27. bidirectional screw; 28. moving Block; 29, fixed block; 30, U-shaped plate; 31, fixed frame; 32, first rotating shaft; 33, first gear; 34, rotating plate; 35, rotating drum; 36, second motor; 37, first pulley; 38, belt; 39, second pulley; 40, vertical frame; 41, second rotating shaft; 42, third gear; 43, fourth gear; 44, gear ring; 45, screw drum; 46, screw sleeve; 47, moving ring; 48, connecting rod; 49, limiting groove; 50, limiting block; 51, tightening cover; 52, pressing frame; 53, U-shaped block; 54, positioning pin; 55, L-shaped plate. DETAILED DESCRIPTION

[0016] The following is combined with Figures 1-9 The present invention is described in further detail.

[0017] Reference Figures 1-9, the embodiment of the present invention discloses a welding tool for fin tube processing, including a workbench 1, an external welding structure is provided in the middle of the workbench 1, two connecting blocks 9 are connected to the rear of the workbench 1, a vertical plate 10 is provided on the rear side of the connecting block 9, two cross bars 11 are provided on the vertical plate 10 through a driving structure, a first insertion rod 13 and a second insertion rod 14 are provided on the two cross bars 11 respectively through a first transmission structure, an internal welding structure is provided at one end of the first insertion rod 13, a second transmission structure is provided in the middle of the front side of the vertical plate 10, support seats 2 are fastened with screws on the left and right sides of the workbench 1, a placement seat 3 is installed on the support seat 2, and a pressing and limiting structure is provided on the placement seat 3; The external welding structure includes a middle groove 4 provided in the middle of the workbench 1. Support plates 5 are connected to the inner walls of the front and rear sides of the middle groove 4. A fixing ring 6 is installed on the top of the two supporting plates 5. A swivel 7 is rotatably provided on the inner wall of the fixing ring 6. Two external welding guns 8 are installed along the radial direction of the inner wall of the swivel 7. The internal welding structure includes an end sleeve 24 fixedly mounted on one end of the first insertion rod 13, and the first insertion rod 13 and the second insertion rod 14 are both provided with a tight limiting structure at one end away from each other. A first fixing ring 15 is fixedly mounted on the end sleeve 24, and two inner welding guns 16 are radially installed on the first fixing ring 15. The first insertion rod 13 and the second insertion rod 14 are both provided with a scraping structure at one end close to each other, and a cleaning structure is provided on the end sleeve 24 and the second insertion rod 14. After the two fin tubes are placed in the two placement seats 3, the first insertion rod 13 and the second insertion rod 14 can be inserted into the fin tube, and the first insertion rod 13 drives the inner welding gun 16 to move into the fin tube. During welding, the outer welding gun 8 is used to weld on the outside of the fin tube, and the inner welding gun 16 is used to weld on the inside of the fin tube. This greatly improves the firmness of the fin tube welding and improves the welding quality.

[0018] See also Figure 1 、 Figure 4 、 Figure 8 and Figure 9 The scraping structure includes a scraper 17 fixedly arranged on one end of the first insertion rod 13 and the second insertion rod 14, the side of the scraper 17 is in contact with the inner wall of the fin tube, and a collection frame 18 is provided in the workbench 1; The cleaning structure includes a second fixing ring 19 fixedly mounted on the end sleeve 24 and the second insertion rod 14. A plurality of cleaning blocks 20 are connected to the side of the second fixing ring 19. Each cleaning block 20 is provided with bristles 21. A blocking frame 22 is provided on the end sleeve 24 between the second fixing ring 19 and the first fixing ring 15. A blocking net 23 is installed on the blocking frame 22. The driving structure includes a through slot 25 opened on the vertical plate 10, and a bidirectional screw 27 is rotatably connected between the groove walls at both ends of the through slot 25. The left and right sections of the thread on the bidirectional screw 27 are in opposite directions. Two movable blocks 28 are sleeved on the bidirectional screw 27, and each movable block 28 is connected to a fixed block 29 on the front side. The middle part of the fixed block 29 rotates through the rotating cylinder 35, and the cross bar 11 is fixed through the rotating cylinder 35. The U-shaped plate 30 is connected to the top of the fixed block 29, and the cross bar 11 rotates through the U-shaped plate 30. The side of the U-shaped plate 30 away from the fixed block 29 is connected to the L-shaped plate 55. One end of the L-shaped plate 55 is connected to the side plate 12, and the cross bar 11 rotates through the side plate 12. The first insertion rod 13 and the second insertion rod 14 respectively rotate through the two side plates 12. The first motor is installed on one side of the vertical plate 10 26. One end of the output shaft of the first motor 26 is connected to the bidirectional screw 27. When the first motor 26 on the vertical plate 10 is started to drive the bidirectional screw 27 to rotate, since the moving block 28 is provided with a thread groove for the bidirectional screw 27 to pass through, the two moving blocks 28 rotate synchronously in opposite directions on the rotating bidirectional screw 27, thereby automatically driving the first insertion rod 13 and the second insertion rod 14 to be inserted into the fin tube for welding. When the first insertion rod 13 and the second insertion rod 14 move, they can drive the bristles 21 on the cleaning block 20 to clean impurities in the fin tube and debris generated during the welding process. At the same time, the impurities cleaned can be brought out of the fin tube with the movement of the scraper 17, and the impurities and debris are discharged to the collection frame 18 for collection, which is convenient for centralized processing.

[0019] See also Figure 1 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7 The first transmission structure includes a first pulley 37 mounted on the end of the cross bar 11 away from the fixed block 29, and a second pulley 39 is mounted on the ends of the first insertion rod 13 and the second insertion rod 14 away from each other. A belt 38 is tightly mounted between the first pulley 37 and the second pulley 39; The second transmission structure includes a fixed frame 31 fastened by bolts in the middle of the front side of the riser 10, a first rotating shaft 32 rotating through the fixed frame 31, a first gear 33 fixedly sleeved on the first rotating shaft 32, a second motor 36 is installed on one side of the fixed frame 31, the output shaft of the second motor 36 is inserted into the fixed frame 31 and a second gear is sleeved on one end, the second gear is meshed with the first gear 33, and a rotating plate 34 is connected to both ends of the first rotating shaft 32. The end face of the rotating plate 34 is in a positive direction shape. The rotating plate 34 is movably inserted into a slot provided on the end face of the crossbar 11, and a third transmission structure is provided between the first gear 33 and the rotating ring 7; The third transmission structure includes a vertical frame 40 fastened to the workbench 1 by screws, and the vertical frame 40 rotates near the top and passes through the second rotating shaft 41. The middle of the second rotating shaft 41 is fixedly provided with a fourth gear 43, and the fourth gear 43 is meshed with the first gear 33. The second rotating shaft 41 is sleeved with a third gear 42 at both ends, and the rotating ring 7 is fixedly provided with a gear ring 44 at both ends. The teeth on the gear ring 44 are meshed with the third gear 42. When welding or cleaning, the second motor 36 on the fixed frame 31 can be started to drive the first rotating shaft 32 to rotate through the second gear and the first gear 33, and the cross bar 11 is driven to rotate through the rotating plate 34, and then the first insertion rod 13 and the second insertion rod 14 are driven to rotate as a whole through two sets of belts 38, the first pulley 37 and the second pulley 39, thereby automatically realizing the rotary welding and rotary cleaning functions.

[0020] See also Figure 1-Figure 3 The abutment and limiting structure includes a screw barrel 45 fixedly sleeved on the ends of the first insertion rod 13 and the second insertion rod 14 away from each other, a screw sleeve 46 is sleeved on the screw barrel 45, one end of the screw sleeve 46 is rotatably mounted on a moving ring 47, a plurality of connecting rods 48 are connected to the side of the moving ring 47, one end of the connecting rod 48 is mounted on a tightening cover 51, a plurality of limiting blocks 50 are arranged on the inner wall of the tightening cover 51, and a limiting groove 49 for the limiting block 50 to be movably inserted is opened on the first insertion rod 13 and the second insertion rod 14; The clamping and limiting structure includes a clamping frame 52 rotatably mounted on the placement seat 3, and a U-shaped block 53 is provided on the rear side of the placement seat 3. The clamping frame 52 is inserted into the U-shaped block 53, and the clamping frame 52 and the U-shaped block 53 are movable through the positioning pin 54. When the first insertion rod 13 and the second insertion rod 14 are inserted into the fin tube, the clamping cover 51 can be driven to move and press against the ends of the two fin tubes for clamping and limiting. During welding, the fin tube is prevented from being limited, and when the screw sleeve 46 is rotated on the screw barrel 45, the limiting effect of the limiting block 50 is cooperated, so that the position of the clamping cover 51 can be flexibly adjusted according to the length of the fin tube; after welding, the clamping frame 52 is pressed against the fin tube, and in the process of removing the scraper 17, the scraper 17 can smoothly take out the impurities cleaned in the fin tube and the debris generated during the welding process, avoiding the movement of the scraper 17 and the problem of directly taking the fin tube off the placement seat 3.

[0021] The implementation principle of a welding tool for fin tube processing in an embodiment of the present invention is as follows: first, two fin tubes to be welded are placed in two placement seats 3 respectively, and the ends of the two fin tubes are pressed tightly in the rotating ring 7. Then, the first motor 26 is started to drive the bidirectional screw 27 to rotate, and the two moving blocks 28 drive the two cross bars 11 to move synchronously in the direction of approaching each other, thereby driving the first insertion rod 13 and the second insertion rod 14 to move and insert into the fin tube. When the internal welding gun 16 on the first insertion rod 13 moves to the welding position between the two fin tubes, the first insertion rod 13 and the second insertion rod 14 are moved to the welding position between the two fin tubes. The pressing cover 51 on the rod 14 is pressed against one end of the fin tube to limit the position between the two fin tubes. Then, the pressing frame 52 is covered on the placement seat 3, the pressing frame 52 is pressed against the fin tube, and the positioning pin 54 passes through the pressing frame 52 and the U-shaped block 53 to limit the pressing frame 52 on the placement seat 3. Then, during welding, the second motor 36 on the fixed frame 31 is started, and the first rotating shaft 32 is driven to rotate through the second gear and the first gear 33, and then the two cross bars 11 are driven to rotate through the rotating plate 34, and the two sets of first pulleys 37, belts 38 and second pulleys 3 are used. 9 drives the first insertion rod 13 and the second insertion rod 14 to rotate. At the same time, the second rotating shaft 41 and the third gear 42 are driven to rotate as a whole through the first gear 33 and the fourth gear 43. The third gear 42 drives the gear ring 44 and the rotating ring 7 to rotate, so that the inner welding gun 16 and the outer welding gun 8 can be driven to rotate at the same time, and automatic rotary welding is performed inside and outside the fin tube, which greatly improves the welding efficiency. In addition, during the welding process, the metal blocking net 23 on the blocking frame 22 blocks the debris generated during the welding process to prevent the high-temperature debris from burning the brush bristles 21 and affecting the brush Normal use of the bristles 21. After welding, the second motor 36 continues to work, the first insertion rod 13 and the second insertion rod 14 continue to rotate, and the first motor 26 drives the bidirectional screw 27 to rotate in the opposite direction. The first insertion rod 13 and the second insertion rod 14 are gradually removed from the fin tube, and drive the two sets of bristles 21 to rotate, and automatically clean the inside of the fin tube. At the same time, it also drives the scraper 17 to move, and the impurities in the cleaning area of ​​the fin tube and the debris generated during the welding process are taken out of the fin tube, and discharged to the collection frame 18 for collection, so that the welding of the fin tube can be realized.

[0022] The above are all preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A welding tool for fin tube processing, comprising a workbench (1), characterized in that: An external welding structure is provided in the middle of the workbench (1), two connecting blocks (9) are connected to the back of the workbench (1), a vertical plate (10) is provided on the rear side of the connecting block (9), two cross bars (11) are provided on the vertical plate (10) through a driving structure, a first insertion rod (13) and a second insertion rod (14) are provided on the two cross bars (11) respectively through a first transmission structure, an internal welding structure is provided at one end of the first insertion rod (13), a second transmission structure is provided in the middle of the front side of the vertical plate (10), support seats (2) are fastened with screws on both left and right sides of the workbench (1), a placement seat (3) is installed on the support seat (2), and a clamping limit structure is provided on the placement seat (3); The external welding structure comprises a middle groove (4) provided in the middle of the workbench (1), support plates (5) are connected to the inner walls of the front and rear sides of the middle groove (4), fixed rings (6) are installed on the tops of the two support plates (5), a rotating ring (7) is rotatably provided on the inner wall of the fixed ring (6), and two external welding guns (8) are installed along the radial direction of the inner wall of the rotating ring (7); The internal welding structure includes an end sleeve (24) fixedly sleeved on one end of the first insertion rod (13), the first insertion rod (13) and the second insertion rod (14) are both provided with a tight limiting structure at one end away from each other, a first fixing ring (15) is fixedly sleeved on the end sleeve (24), two inner welding guns (16) are mounted on the first fixing ring (15) along its radial direction, the first insertion rod (13) and the second insertion rod (14) are both provided with a scraping structure at one end close to each other, and a cleaning structure is provided on the end sleeve (24) and the second insertion rod (14).

2. The welding tool for fin tube processing according to claim 1, characterized in that: The scraping structure comprises a scraper (17) fixedly arranged on one end of the first insertion rod (13) and the second insertion rod (14), the side of the scraper (17) being in contact with the inner wall of the fin tube, and a collecting frame (18) being arranged in the workbench (1).

3. The welding tool for fin tube processing according to claim 1, characterized in that: The cleaning structure comprises a second fixing ring (19) fixedly mounted on the end sleeve (24) and the second insertion rod (14); a plurality of cleaning blocks (20) are connected to the side of the second fixing ring (19); each cleaning block (20) is provided with bristles (21); a blocking frame (22) is provided on the end sleeve (24) between the second fixing ring (19) and the first fixing ring (15); and a blocking net (23) is installed on the blocking frame (22).

4. The welding tool for fin tube processing according to claim 1, characterized in that: The driving structure includes a through slot (25) provided on the vertical plate (10), a bidirectional screw (27) is rotatably connected between the groove walls at both ends of the through slot (25), the left and right sections of the thread on the bidirectional screw (27) are in opposite directions, two moving blocks (28) are sleeved on the bidirectional screw (27), and a fixed block (29) is connected to the front side of each moving block (28), the middle of the fixed block (29) is rotated to pass through the rotating drum (35), the cross bar (11) is fixed to pass through the rotating drum (35), and the fixed block (29) is connected to a U-shaped The plate (30) is provided with a U-shaped plate (30), the cross bar (11) is rotated to pass through the U-shaped plate (30), the U-shaped plate (30) is connected to the L-shaped plate (55) on one side away from the fixed block (29), one end of the L-shaped plate (55) is connected to the side plate (12), the cross bar (11) is rotated to pass through the side plate (12), the first insertion rod (13) and the second insertion rod (14) are rotated to pass through the two side plates (12) respectively, and the first motor (26) is installed on one side of the vertical plate (10), and one end of the output shaft of the first motor (26) is connected to the bidirectional screw (27).

5. The welding tool for fin tube processing according to claim 1, characterized in that: The first transmission structure comprises a first pulley (37) sleeved on an end of the cross bar (11) away from the fixed block (29), a second pulley (39) sleeved on an end of the first insertion rod (13) and the second insertion rod (14) away from each other, and a belt (38) is tightly sleeved between the first pulley (37) and the second pulley (39).

6. The welding tool for fin tube processing according to claim 1, characterized in that: The second transmission structure includes a fixed frame (31) fastened by bolts at the middle of the front side of the vertical plate (10), the fixed frame (31) rotates through a first rotating shaft (32), the first rotating shaft (32) is fixedly sleeved with a first gear (33), a second motor (36) is installed on one side of the fixed frame (31), an output shaft of the second motor (36) is inserted into the fixed frame (31), and a second gear is sleeved on one end, the second gear is meshed with the first gear (33), both ends of the first rotating shaft (32) are connected to a rotating plate (34), the end face of the rotating plate (34) is in a positive direction shape, the rotating plate (34) is movably inserted into a slot provided on the end face of the cross bar (11), and a third transmission structure is provided between the first gear (33) and the rotating ring (7).

7. The welding tool for fin tube processing according to claim 6, characterized in that: The third transmission structure includes a vertical frame (40) fastened to the workbench (1) by screws, the vertical frame (40) rotates near the top end and passes through the second rotating shaft (41), the second rotating shaft (41) is fixedly sleeved at the middle part thereof, the fourth gear (43) is meshingly connected with the first gear (33), the second rotating shaft (41) is sleeved with a third gear (42) at both ends thereof, the rotating ring (7) is fixedly sleeved with a gear ring (44), the teeth on the gear ring (44) are meshingly connected with the third gear (42).

8. The welding tool for fin tube processing according to claim 1, characterized in that: The abutting and limiting structure comprises a screw barrel (45) fixedly sleeved on one end of the first insertion rod (13) and the second insertion rod (14) away from each other, a screw sleeve (46) sleeved on the screw barrel (45), a movable ring (47) rotatably mounted on one end of the screw sleeve (46), a plurality of connecting rods (48) connected to the side of the movable ring (47), a holding cover (51) mounted on one end of the connecting rod (48), a plurality of limiting blocks (50) arranged on the inner wall of the holding cover (51), and limiting grooves (49) for the limiting blocks (50) to be movably inserted into are provided on both the first insertion rod (13) and the second insertion rod (14).

9. The welding tool for fin tube processing according to claim 1, characterized in that: The clamping and limiting structure comprises a clamping frame (52) rotatably mounted on a placement seat (3); a U-shaped block (53) is provided on the rear side of the placement seat (3); the clamping frame (52) is inserted into the U-shaped block (53); and a positioning pin (54) is movably passed through the clamping frame (52) and the U-shaped block (53).

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