Fire damper welding device and welding method

Abstract

The present invention relates to the technical field of fire damper welding, and in particular to a fire damper welding device, comprising a workbench, a support plate rotatably fitted on the upper surface of the workbench, a rotating mechanism connected to the lower surface of the support plate, a fixing mechanism arranged on the upper surface of the support plate and at the four corners, the fixing mechanism comprising a plurality of clamping parts, a clamping moving mechanism arranged at the upper and lower end surfaces of the clamping parts, and a fire damper welding method is also provided. In the present invention, the rotating mechanism, the traveling mechanism and the welding mechanism are effectively combined, so that the device can complete the rapid welding of the four corner connections of a plurality of angle steels and a plurality of fixing frames using only one welding gun, and at the same time, the fixing mechanism and the clamping moving mechanism arranged in the device can effectively fix the angle steel between the upper clamping plate and the lower clamping plate and perform rapid fitting and fixing at the four corners of the plurality of fixing frames, thereby improving the welding efficiency of the fire damper frame.

Description

Technical Field

[0001] The invention relates to the technical field of fire damper welding, and in particular to a fire damper welding device and a welding method. Background Art

[0002] Fire damper is a kind of temperature-controlled valve that uses gravity and spring mechanism to close. Some new products use memory alloy to produce deformation to close the valve. Its function is: when the smoke temperature reaches 280℃, people have basically been evacuated, smoke exhaust is meaningless, and the smoke is already carrying fire, so the valve automatically closes to prevent the fire from spreading.

[0003] When welding the fire damper frame, four connecting frames need to be used and angle steels are used at the four corners of the four connecting frames for synchronous reinforcement welding. However, when welding the angle steel and the connecting frame, the existing welding device generally needs to use four welding guns to weld the four corners of the two connecting frames, thereby increasing the consumption rate of the welding guns to a certain extent.

[0004] At the same time, when using angle steel and connecting frame for synchronous welding, the angle steel may be inconvenient to be quickly combined and fixed with the corner of the connecting frame, thereby affecting the overall welding efficiency and final results of the fire damper frame. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the background technology and to propose a fire damper welding device and a welding method.

[0006] In order to achieve the above purpose, the technical solution adopted by the present invention is: a fire damper welding device, comprising a workbench, a support plate is rotatably fitted on the upper surface of the workbench, a rotating mechanism is connected to the lower surface of the support plate, a fixing mechanism is arranged on the upper surface of the support plate and at the four corners, the fixing mechanism comprises a plurality of clamping parts, a clamping moving mechanism is arranged at the upper and lower end surfaces of the clamping parts, a moving opening is arranged at one end of the workbench, a traveling mechanism is arranged at one end of the workbench and at the moving opening, a welding mechanism is installed at the moving end of the traveling mechanism, and a supporting leg is fixedly installed on the lower surface of the workbench.

[0007] Preferably, the rotating mechanism includes a rotating column, one end of which passes through the middle of the workbench and is connected to the lower surface of the support plate, the outer surface of the rotating column is fitted with a first gear, a second gear is meshed at the extension of the first gear, the inner side of the second gear is connected to the output shaft of the motor, the motor is fixedly installed on the lower surface of the workbench through a mounting frame, and the bottom end of the rotating column and the upper end of the motor output shaft are respectively fixedly installed with fixings.

[0008] Preferably, the fixing mechanism includes four fixing plates, which are respectively fixedly mounted at the four corners of the upper surface of the support plate, and the first telescopic cylinder and the first guide rod are respectively installed inside the fixing plates near the upper end, and the telescopic ends of the first telescopic cylinder and the first guide rod are fixedly connected to the rear side of the clamping piece, and a V-shaped clamping opening is provided on the other side of the clamping piece.

[0009] Preferably, the clamping moving mechanism includes an upper clamping plate and a lower clamping plate, the inner rear end of the upper clamping plate slidingly cooperates with the outer surfaces of the two support rods, the bottom end of the support rod is fixedly connected to the upper end of the moving plate, the upper end of the support rod is fixedly installed with a top column, the outer surface of the support rod is covered with a first spring, and the two ends of the first spring are respectively connected to the lower end of the top column and the upper surface of the upper clamping plate.

[0010] Preferably, a pull ring is fixedly installed on the upper surface of the upper clamping plate and at the rear end, and the bottom ends of the movable plate and the lower clamping plate are respectively slidably matched with the outer surfaces of the two sliding rods, a fixing column is fixedly installed at one end of the sliding rod, and the other end of the sliding rod is fixedly connected to one side of the mounting plate, and one end of the folding plate is fixedly connected to the bottom end of one side of the mounting plate.

[0011] Preferably, the bottom ends of the two folding plates are respectively connected to the upper and lower end surfaces of the clamping parts, and the outer surface of the sliding rod is provided with a second spring, the two ends of one of the second springs are respectively connected to the front side of the mounting plate and the rear side of the movable plate, and the two ends of the other second spring are respectively connected to the front side of the mounting plate and the rear side of the lower clamping plate, and the bottom ends of the movable plate and the lower clamping plate are respectively slidably matched with the upper end surfaces of the two folding plates.

[0012] Preferably, the travel mechanism includes two bases, the two bases are fixedly mounted at one end of the workbench, the inner sides of the two bases are rotatably connected to the two ends of the screw rod respectively, one end of the screw rod passes through the interior of a base and is connected to the output shaft of a servo motor, the servo motor is fixedly mounted on the inner side of a base, and the outer surface of the screw rod is provided with a threaded sliding seat.

[0013] Preferably, the welding mechanism includes a second telescopic cylinder and a second guide rod, the second telescopic cylinder and the second guide rod are fixedly mounted on the inner side of the sliding seat, the telescopic ends of the second telescopic cylinder and the second guide rod are fixedly connected to the rear side of the moving seat, a third telescopic cylinder and a third guide rod are fixedly mounted inside the moving seat, the telescopic ends of the third telescopic cylinder and the third guide rod are fixedly connected to the lower surface of the mounting seat.

[0014] Preferably, a welding gun is fixedly installed inside the mounting seat, and an electric wire is fixedly connected to the bottom end of the welding gun. The inner sides of the two bases are fixedly connected to the two ends of the support frame, and the upper surface of the support frame is slidably matched with the bottom end of the slide seat.

[0015] A fire damper welding method is also provided, comprising the following steps:

[0016] S1: Place the angle steel inside the clamping moving mechanism;

[0017] S2: placing four fixing frames in the middle of the support plate and close to each other, and fixing the fixing frames by a fixing mechanism;

[0018] S3: Control the clamping moving mechanism to push the angle steel to make it close to the fixed frame;

[0019] S4: Welding is performed between the side edge of the angle steel and the surface of the fixing frame by means of a welding mechanism.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. In the present invention, the servo motor is started, and the servo motor drives the slide and the mechanism on the slide to move horizontally to the left side of the workbench, and the second telescopic cylinder is started, and the second telescopic cylinder drives the moving seat to move to the front of the fixed frame and one side of the angle steel, the welding gun is energized through the wire, and the third telescopic cylinder is started, and the third telescopic cylinder drives the welding gun to move up and down, and the welding gun quickly welds the connection between one side of the angle steel and one side of the fixed frame, and then the motor is started, and the motor drives the support plate and the mechanism on the support plate to rotate 90 degrees every time, and the traveling mechanism and the welding mechanism are synchronously started to quickly weld the connection between one side of multiple angle steels and one side of multiple fixed frames, and then the servo motor is started to drive the slide and the mechanism on the slide to move horizontally to the right side of the workbench, and the above operation is repeated to quickly weld the connection between the other side of the multiple angle steels and the other side of the multiple fixed frames.

[0022] 2. In the present invention, the pull ring is pulled to move the upper clamping plate upward, and then the angle steel is placed between the upper clamping plate and the lower clamping plate, and the rear side of the angle steel is pressed against the V-shaped clamping opening set on the front side of the clamping piece, and the pull ring is released. The upper clamping plate is elastically contracted by the first spring set at the upper end to fix and clamp the angle steel between the lower clamping plate, and then the four fixing frames are placed in the middle of the support plate and placed close to each other, and multiple first telescopic cylinders are started. The first telescopic cylinders drive the clamping piece and the mechanism set on the clamping piece to move toward the four connecting corners of the four fixing frames to the inner sides of the four angle steels and respectively press against the four corners of the four fixing frames. When the front ends of the upper clamping plate and the lower clamping plate touch the fixing frames, they slide elastically backward through the sliding rod and the second spring set at the rear ends.

[0023] 3. Based on the above, the present invention effectively combines the rotating mechanism, the traveling mechanism and the welding mechanism, so that the device can complete the rapid welding of the four corner connections of multiple angle steels and multiple fixing frames using only one welding gun. At the same time, the fixing mechanism and the clamping moving mechanism provided in the device can effectively fix the angle steel between the upper clamping plate and the lower clamping plate and quickly fit and fix it with the four corners of the multiple fixing frames, thereby improving the welding efficiency of the fire damper frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a fire damper welding device and a welding method of the present invention;

[0025] Figure 2 It is a structural schematic diagram of the main mechanisms in a fire damper welding device and welding method of the present invention;

[0026] Figure 3 It is a structural schematic diagram of a support plate in a fire damper welding device and welding method of the present invention;

[0027] Figure 4 It is a structural schematic diagram of a rotating mechanism and a supporting plate in a fire damper welding device and a welding method of the present invention;

[0028] Figure 5 It is a structural schematic diagram of a fixing mechanism and a clamping moving mechanism in a fire damper welding device and welding method of the present invention;

[0029] Figure 6 It is a structural schematic diagram of a traveling mechanism and a welding mechanism in a fire damper welding device and a welding method of the present invention;

[0030] Figure 7 It is a structural schematic diagram of a welding mechanism in a fire damper welding device and welding method of the present invention;

[0031] Figure 8 The figure is a structural schematic diagram of an actual product in a fire damper welding device and welding method of the present invention.

[0032] In the figure: 1, workbench; 2, support plate; 3, clamping part; 4, moving port; 5, support leg; 6, rotating column; 7, first gear; 8, fixing part; 9, second gear; 10, motor; 11, mounting frame; 12, fixing plate; 13, first telescopic cylinder; 14, first guide rod; 15, V-shaped clamping port; 16, upper clamping plate; 17, lower clamping plate; 18, support rod; 19, moving plate; 20, top column; 21, first spring ; 22. Pull ring; 23. Sliding rod; 24. Fixed column; 25. Mounting plate; 26. Folding plate; 27. Second spring; 28. Base; 29. ​​Screw rod; 30. Servo motor; 31. Sliding seat; 32. Support frame; 33. Second telescopic cylinder; 34. Second guide rod; 35. Moving seat; 36. Third telescopic cylinder; 37. Third guide rod; 38. Mounting seat; 39. Welding gun; 40. Wire; 41. Fixed frame; 42. Angle steel. DETAILED DESCRIPTION

[0033] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0034] like Figure 1-Figure 8 A fire damper welding device shown in the figure comprises a workbench 1, a support plate 2 is rotatably fitted on the upper surface of the workbench 1, a rotating mechanism is connected to the lower surface of the support plate 2, a fixing mechanism is arranged on the upper surface of the support plate 2 and at the four corners, the fixing mechanism comprises a plurality of clamping parts 3, a clamping moving mechanism is arranged at the upper and lower end surfaces of the clamping parts 3, a moving opening 4 is arranged at one end of the workbench 1, a traveling mechanism is arranged at one end of the workbench 1 and at the moving opening 4, a welding mechanism is installed at the moving end of the traveling mechanism, and a supporting leg 5 is fixedly installed on the lower surface of the workbench 1.

[0035] The present invention effectively combines the rotating mechanism, the traveling mechanism and the welding mechanism, so that the device can complete the rapid welding of the four corner connections of multiple angle steels 42 and multiple fixing frames 41 using only one welding gun 39. At the same time, the fixing mechanism and the clamping moving mechanism provided in the device can effectively fix the angle steel 42 between the upper clamping plate 16 and the lower clamping plate 17 and quickly fit and fix it with the four corners of the multiple fixing frames 41, thereby improving the welding efficiency of the fire damper frame.

[0036] like Figure 4As shown, the rotating mechanism includes a rotating column 6, one end of which passes through the middle of the workbench 1 and is connected to the lower surface of the support plate 2. The outer surface of the rotating column 6 is covered with a first gear 7, and the second gear 9 is meshed at the extension of the first gear 7. The inner side of the second gear 9 is connected to the output shaft of the motor 10. The motor 10 is fixedly installed on the lower surface of the workbench 1 through a mounting frame 11. The bottom end of the rotating column 6 and the upper end of the output shaft of the motor 10 are respectively fixedly installed with fixing parts 8. When the motor 10 is started, the motor 10 drives the second gear 9 to rotate, and the second gear 9 drives the first gear 7 meshed at the extension to rotate, and the first gear 7 then drives the rotating column 6 and the support plate 2 to rotate.

[0037] like Figure 3 and Figure 5 As shown, the fixing mechanism includes four fixing plates 12, which are respectively fixedly mounted at the four corners of the upper surface of the support plate 2, and the first telescopic cylinder 13 and the first guide rod 14 are respectively installed near the upper end of the fixing plate 12. The telescopic ends of the first telescopic cylinder 13 and the first guide rod 14 are fixedly connected to the rear side of the clamping member 3, and a V-shaped clamping opening 15 is provided on the other side of the clamping member 3.

[0038] The clamping moving mechanism includes an upper clamping plate 16 and a lower clamping plate 17. The inner rear end of the upper clamping plate 16 is slidably matched with the outer surfaces of two support rods 18. The bottom end of the support rod 18 is fixedly connected to the upper end of the moving plate 19. The upper end of the support rod 18 is fixedly installed with a top column 20. The outer surface of the support rod 18 is covered with a first spring 21. The two ends of the first spring 21 are respectively connected to the lower end of the top column 20 and the upper surface of the upper clamping plate 16. A pull ring 22 is fixedly installed on the upper surface of the upper clamping plate 16 and at the rear end, and the bottom ends of the movable plate 19 and the lower clamping plate 17 are respectively slidably matched with the outer surfaces of the two sliding rods 23, and one end of the sliding rod 23 is fixedly installed with a fixing column 24, and the other end of the sliding rod 23 is fixedly connected to one side of the mounting plate 25, and one end of the folding plate 26 is fixedly connected to the bottom end of one side of the mounting plate 25. The bottom ends of the two folding plates 26 are respectively connected to the upper and lower end surfaces of the clamping member 3, and the outer surface of the sliding rod 23 is covered with a second spring 27, and the two ends of one second spring 27 are respectively connected to the front side of the mounting plate 25 and the rear side of the movable plate 19, and the two ends of the other second spring 27 are respectively connected to the front side of the mounting plate 25 and the rear side of the lower clamping plate 17, and the bottom ends of the movable plate 19 and the lower clamping plate 17 are respectively slidably matched with the upper end surfaces of the two folding plates 26. Pull the pull ring 22 to move the upper clamping plate 16 upward, and then place the angle steel 42 between the upper clamping plate 16 and the lower clamping plate 17, and make the rear side of the angle steel 42 close to the V-shaped clamping port 15 set on the front side of the clamping member 3, release the pull ring 22, and the upper clamping plate 16 is elastically contracted by the first spring 21 set at the upper end to fix and clamp the angle steel 42 between the lower clamping plate 17, and then the four fixing frames 41 are placed in the middle of the support plate 2 and placed close to each other, and start multiple first telescopic cylinders 13. The first telescopic cylinders 13 drive the clamping member 3 and the mechanism set on the clamping member 3 to move to the four connecting corners of the four fixing frames 41 to the inner sides of the four angle steels 42 respectively close to the four corners of the four fixing frames 41. When the front ends of the upper clamping plate 16 and the lower clamping plate 17 touch the fixing frame 41, they slide elastically backward through the sliding rod 23 and the second spring 27 set at the rear end.

[0039] like Figure 1 , Figure 2 and Figure 6 As shown, the travel mechanism includes two bases 28, and the two bases 28 are fixedly installed at one end of the workbench 1. The inner sides of the two bases 28 are rotatably connected to the two ends of the screw rod 29 respectively. One end of the screw rod 29 passes through the interior of a base 28 and is connected to the output shaft of the servo motor 30. The servo motor 30 is fixedly installed on the inner side of a base 28. The outer surface of the screw rod 29 is provided with a threaded slide 31. The inner sides of the two bases 28 are fixedly connected to the two ends of the support frame 32. The upper surface of the support frame 32 is slidably matched with the bottom end of the slide 31. When the servo motor 30 is started, the servo motor 30 drives the screw rod 29 to rotate, and the screw rod 29 drives the slide 31 to move horizontally on the support frame 32.

[0040] like Figure 7 As shown, the welding mechanism includes a second telescopic cylinder 33 and a second guide rod 34, which are fixedly mounted on the inner side of the slide 31, and the telescopic ends of the second telescopic cylinder 33 and the second guide rod 34 are fixedly connected to the rear side of the moving seat 35, and the third telescopic cylinder 36 and the third guide rod 37 are fixedly mounted inside the moving seat 35, and the telescopic ends of the third telescopic cylinder 36 and the third guide rod 37 are fixedly connected to the lower surface of the mounting seat 38. A welding gun 39 is fixedly mounted inside the mounting seat 38, and a wire 40 is fixedly connected to the bottom end of the welding gun 39. The second telescopic cylinder 33 is started, and the second telescopic cylinder 33 drives the moving seat 35 to move to the front of one side close to the fixed frame 41 and the angle steel 42, and the welding gun 39 is energized through the wire 40, and the third telescopic cylinder 36 is started, and the third telescopic cylinder 36 drives the welding gun 39 to move up and down, and the welding gun 39 quickly welds the connection between the angle steel 42 and the fixed frame 41.

[0041] A fire damper welding method is provided, comprising the following steps:

[0042] S1: Place the angle steel 42 inside the clamping moving mechanism;

[0043] S2: placing four fixing frames 41 in the middle of the support plate 2 and close to each other, and fixing the fixing frames 41 by a fixing mechanism;

[0044] S3: Control the clamping moving mechanism to push the angle steel 42 to make it close to the fixing frame 41;

[0045] S4: welding the side edge of the angle steel 42 and the surface of the fixing frame 41 by a welding mechanism.

[0046] During specific use, the pull ring 22 is pulled to make the upper clamping plate 16 move upward, and then the angle steel 42 is placed between the upper clamping plate 16 and the lower clamping plate 17, and the rear side of the angle steel 42 is pressed against the V-shaped clamping opening 15 set on the front side of the clamping member 3, and the pull ring 22 is released. The upper clamping plate 16 is elastically contracted and clamped between the lower clamping plate 17 by the first spring 21 set at the upper end, and then the four fixing frames 41 are placed in the middle of the support plate 2 and placed close to each other, and multiple first telescopic cylinders 13 are started. The first telescopic cylinders 13 drive the mechanism set on the clamping member 3 and the clamping member 3 to move toward the four connecting corners of the four fixing frames 41 to the inner sides of the four angle steels 42 and respectively press against the four corners of the four fixing frames 41. When the front ends of the upper clamping plate 16 and the lower clamping plate 17 touch the fixing frame 41, they slide elastically backward through the sliding rod 23 and the second spring 27 set at the rear end, and the servo motor 30 is started. The servo motor 30 drives The slide 31 and the mechanism on the slide 31 move laterally to the left side of the workbench 1, and the second telescopic cylinder 33 is started. The second telescopic cylinder 33 drives the moving seat 35 to move to the front of the fixed frame 41 and the angle steel 42. The welding gun 39 is energized through the wire 40, and the third telescopic cylinder 36 is started. The third telescopic cylinder 36 drives the welding gun 39 to move up and down, and the welding gun 39 quickly welds the connection between one side of the angle steel 42 and the other side of the fixed frame 41. Then, the motor 10 is started. The motor 10 drives the support plate 2 and the mechanism on the support plate 2 to rotate 90 degrees every time, and the traveling mechanism and the welding mechanism are synchronously started to quickly weld the connection between one side of multiple angle steels 42 and one side of multiple fixed frames 41. After that, the servo motor 30 is started to drive the slide 31 and the mechanism on the slide 31 to move laterally to the right side of the workbench 1. The above operation is repeated to quickly weld the connection between the other side of multiple angle steels 42 and the other side of multiple fixed frames 41.

[0047] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A fire damper welding device, comprising a workbench (1), characterized in that: A support plate (2) is rotatably fitted on the upper surface of the workbench (1), a rotating mechanism is connected to the lower surface of the support plate (2), a fixing mechanism is arranged on the upper surface of the support plate (2) and at four corners, the fixing mechanism comprises a plurality of clamping parts (3), a clamping moving mechanism is arranged at the upper and lower end surfaces of the clamping parts (3), a moving opening (4) is arranged at one end of the workbench (1), a travelling mechanism is arranged at one end of the workbench (1) and at the moving opening (4), a welding mechanism is installed at the moving end of the travelling mechanism, and a supporting leg (5) is fixedly installed on the lower surface of the workbench (1); The fixing mechanism comprises four fixing plates (12), the four fixing plates (12) being fixedly mounted at four corners of the upper surface of the support plate (2), and a first telescopic cylinder (13) and a first guide rod (14) being mounted inside the fixing plates (12) near the upper end, respectively, the telescopic ends of the first telescopic cylinder (13) and the first guide rod (14) being fixedly connected to the rear side of the clamping member (3), and a V-shaped clamping opening (15) being provided on the other side of the clamping member (3); The clamping moving mechanism comprises an upper clamping plate (16) and a lower clamping plate (17), the inner rear end of the upper clamping plate (16) is slidably matched with the outer surfaces of the two support rods (18), the bottom end of the support rod (18) is fixedly connected to the upper end of the moving plate (19), the upper end of the support rod (18) is fixedly mounted with a top column (20), the outer surface of the support rod (18) is sleeved with a first spring (21), and the two ends of the first spring (21) are respectively connected to the lower end of the top column (20) and the upper surface of the upper clamping plate (16); A pull ring (22) is fixedly installed on the upper surface of the upper clamping plate (16) and at the rear end thereof; the bottom ends of the movable plate (19) and the lower clamping plate (17) are respectively slidably matched with the outer surfaces of two sliding rods (23); a fixing column (24) is fixedly installed on one end of the sliding rod (23); the other end of the sliding rod (23) is fixedly connected to one side of the mounting plate (25); and one end of the folding plate (26) is fixedly connected to the bottom end of one side of the mounting plate (25); The bottom ends of the two folding plates (26) are respectively connected to the upper and lower end surfaces of the clamping member (3); the outer surface of the sliding rod (23) is sleeved with a second spring (27); the two ends of one of the second springs (27) are respectively connected to the front side of the mounting plate (25) and the rear side of the movable plate (19); the two ends of the other second spring (27) are respectively connected to the front side of the mounting plate (25) and the rear side of the lower clamping plate (17); the bottom ends of the movable plate (19) and the lower clamping plate (17) are respectively slidably matched with the upper end surfaces of the two folding plates (26); The travel mechanism comprises two bases (28), the two bases (28) are fixedly mounted at one end of the workbench (1), the inner sides of the two bases (28) are rotatably connected to the two ends of a screw rod (29), one end of the screw rod (29) passes through the interior of one base (28) and is connected to the output shaft of a servo motor (30), the servo motor (30) is fixedly mounted on the inner side of one base (28), and the outer surface of the screw rod (29) is sleeved with a threaded sliding seat (31); The welding mechanism comprises a second telescopic cylinder (33) and a second guide rod (34), the second telescopic cylinder (33) and the second guide rod (34) are fixedly mounted on the inner side of the sliding seat (31), the telescopic ends of the second telescopic cylinder (33) and the second guide rod (34) are fixedly connected to the rear side of the moving seat (35), a third telescopic cylinder (36) and a third guide rod (37) are fixedly mounted inside the moving seat (35), the telescopic ends of the third telescopic cylinder (36) and the third guide rod (37) are fixedly connected to the lower surface of the mounting seat (38); A welding gun (39) is fixedly mounted inside the mounting seat (38), and a wire (40) is fixedly connected to the bottom end of the welding gun (39). The inner sides of the two bases (28) are fixedly connected to the two ends of the support frame (32), and the upper surface of the support frame (32) is slidably matched with the bottom end of the slide seat (31).

2. A fire damper welding device according to claim 1, characterized in that: The rotating mechanism comprises a rotating column (6), one end of which passes through the middle of the workbench (1) and is connected to the lower surface of the support plate (2); a first gear (7) is sleeved on the outer surface of the rotating column (6); a second gear (9) is meshed at the outer extension of the first gear (7); the inner side of the second gear (9) is connected to the output shaft of the motor (10); the motor (10) is fixedly mounted on the lower surface of the workbench (1) via a mounting frame (11); and fixing parts (8) are respectively fixedly mounted on the bottom end of the rotating column (6) and the upper end of the output shaft of the motor (10).

3. A fire damper welding method, using the device according to any one of claims 1-2, characterized in that: The following steps are involved: S1: Place the angle steel (42) inside the clamping moving mechanism; S2: placing four fixing frames (41) in the middle of the support plate (2) and close to each other, and fixing the fixing frames (41) by a fixing mechanism; S3: Control the clamping moving mechanism to push the angle steel (42) to make it close to the fixing frame (41); S4: Welding is performed between the side edge of the angle steel (42) and the surface of the fixing frame (41) by means of a welding mechanism.

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