Welding device and method for air conditioning pipeline maintenance

Abstract

The present invention discloses a welding device and method for repairing air-conditioning pipes, comprising a fixed base, a sliding assembly is fixedly arranged on the upper surface of the fixed base, both ends of the sliding assembly are transmission-connected with transmission blocks, a moving plate is welded on the upper surface of the sliding block, a first servo motor is fixedly installed on the outer surface of the moving plate, an output end of the first servo motor is transmission-connected with a rotating shaft, a clamping assembly is welded on the other end of the rotating shaft, two groups of side plates are symmetrically welded on both ends of the upper surface of the fixed base, a top plate is welded on the top of the two groups of side plates, and a moving seat is slidably arranged on the lower surface of the top plate; the present invention can clamp and fix the air-conditioning pipe to be welded by the provided clamping assembly, and can drive the clamped air-conditioning pipe to move in a direction close to each other by the provided sliding assembly, so that the surfaces to be welded are in contact, which is beneficial to the subsequent welding process.

Description

Technical Field

[0001] The invention belongs to the technical field of air-conditioning maintenance, and relates to a welding device and method for repairing air-conditioning pipelines. Background Art

[0002] Air-conditioning ducts need to be regularly inspected and maintained. During the inspection and maintenance process, some structural air-conditioning ducts will be corroded, resulting in the risk of breakage, or have already broken. At this time, these structural air-conditioning ducts need to be welded. The existing welding for air-conditioning duct maintenance still has the following problems: when two structural air-conditioning ducts are welded, it is not convenient to align the welding surfaces and make them fully contact, which affects the effect of subsequent welding. In addition, when welding the welding surfaces, it is inconvenient to rotate the air-conditioning duct, which makes it inconvenient to fully weld the air-conditioning duct around one circle. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a welding device and method for air-conditioning pipe maintenance. The air-conditioning pipes to be welded can be clamped and fixed by the provided clamping assembly, and the provided sliding assembly can drive the clamped air-conditioning pipes to move towards each other, so that the surfaces to be welded are in contact, which is beneficial to the subsequent welding process.

[0004] The cam is connected with the transmission element at the both ends of the sliding element, and the cam is connected with the transmission block at the both ends of the sliding element, the cam is connected with the transmission block at the both ends of the sliding element, the cam is connected with the transmission block at the both ends of the sliding element, the cam is connected with the transmission block at the both ends of the sliding element, the cam is connected with the transmission block at the both ends of the sliding element, the cam is connected with the transmission block at the both ends of the sliding element

[0005] By adopting the above technical scheme, the air-conditioning pipes to be welded can be clamped and fixed by the set clamping assembly, and the set sliding assembly can drive the clamped air-conditioning pipes to move in a direction close to each other, so that the surfaces to be welded are in contact, which is beneficial to the subsequent welding process; the contact surface can be welded by the set welding assembly, and at the same time, the rotating shaft is driven to rotate by the set first servo motor, and the rotating shaft drives the clamping assembly to rotate, so that the clamped air-conditioning pipe rotates, so as to facilitate the completion of the welding work of one circle of the contact surfaces of the two air-conditioning pipes, making the welding more complete; the second mounting plate is pushed downward by the third servo electric cylinder, and the third servo motor drives the grinding wheel to rotate, so that the grinding wheel grinds the welding points of the two air-conditioning pipes, and at the same time, the rotating shaft is driven to rotate by the first servo motor, and the rotating shaft drives the clamping assembly to rotate, so that the clamped air-conditioning pipe rotates, so as to facilitate the grinding work of one circle of the contact surfaces of the two air-conditioning pipes.

[0006] Preferably, the sliding assembly includes a positioning block, a second servo motor and a bidirectional screw. There are two groups of positioning blocks, the two groups of positioning blocks are symmetrically arranged on both sides of the fixed base, the two ends of the bidirectional screw are arranged between the two groups of positioning blocks, the second servo motor is fixedly installed on the outer surface of one group of positioning blocks, and the output end of the second servo motor is transmission connected to one end of the bidirectional screw, and the transmission block is threadedly connected to the bidirectional screw.

[0007] By adopting the above technical solution, the second servo motor drives the bidirectional screw to rotate, and the bidirectional screw drives the transmission blocks on both sides to approach each other, thereby completing the mutual movement of the clamping components. Preferably, the sliding assembly also includes slide rails and sliders. There are four groups of slide rails, which are symmetrically arranged on both sides of the bidirectional screw rod. There are four groups of sliders, which are symmetrically welded on the lower surfaces of the two groups of moving plates, and the sliders are slidably arranged on the slide rails.

[0008] By adopting the above technical solution, the stability of the moving plate during movement can be increased.

[0009] Preferably, the clamping assembly includes a fixed plate, a bearing plate, a screw, a connecting block, a clamping top plate and a clamping bottom plate, one side of the fixed plate is welded to one end of the rotating shaft, the bearing plate is welded to the top of the fixed plate, the screw is threadedly connected to the bearing plate, the connecting block is rotatably arranged at the bottom of the screw, the upper surface of the clamping top plate is welded to the lower surface of the connecting block, and one side of the clamping bottom plate is welded to the inner surface of the fixed plate.

[0010] By adopting the above technical solution, one end of the air-conditioning pipe to be clamped is placed between the clamping top plate and the clamping bottom plate, and the clamping top plate is driven to move by rotating the screw, so that the clamping top plate and the clamping bottom plate cooperate to clamp and fix the end of the air-conditioning pipe.

[0011] Preferably, a hexagonal knob is welded on the top of the screw rod, and a limiting rod is welded on the upper surface of the connecting block, and the limiting rod passes through the bearing plate and is slidably connected to the bearing plate.

[0012] By adopting the above technical solution, the screw rod can be easily rotated, and the bearing plate can be prevented from rotating when the screw rod rotates.

[0013] Preferably, the clamping top plate and the clamping bottom plate are both configured as V-shaped plates, and the clamping top plate is slidably connected to the fixing plate.

[0014] By adopting the above technical solution, air-conditioning pipes of different diameters can be conveniently clamped.

[0015] Preferably, the welding assembly includes a second servo electric cylinder, a first mounting plate and a welding gun, the second servo electric cylinder is fixedly mounted on the lower surface of the movable seat, the first mounting plate is fixedly arranged on the output end of the second servo electric cylinder, and the welding gun is fixedly mounted on the lower surface of the first mounting plate.

[0016] By adopting the above technical solution, the welding gun is driven to move by the second servo motor, so that the welding gun can perform welding work on the contact surfaces of the two air-conditioning pipes.

[0017] Preferably, the grinding assembly includes a third servo electric cylinder, a second mounting plate, a third servo motor and a grinding wheel. The third servo electric cylinder is fixedly mounted on the lower surface of the movable seat, the second mounting plate is fixedly arranged on the output end of the third servo electric cylinder, the third servo motor is fixedly mounted on the lower surface of the second mounting plate, and the grinding wheel is transmission-connected to the output end of the third servo motor.

[0018] By adopting the above technical solution, the grinding wheel is pushed downward by the third servo electric cylinder, and the grinding wheel is driven to rotate by the third servo motor, so that the grinding wheel can grind the welding position.

[0019] Preferably, the first servo motor, the second servo motor, the first servo electric cylinder, the second servo electric cylinder, the third servo electric cylinder, and the third servo motor are electrically connected to a controller, the controller is connected to a control terminal via a wireless communicator, and the controller is also electrically connected to a CCD camera and an alarm.

[0020] The main beneficial effects of the present invention are: The clamping assembly provided can clamp and fix the air-conditioning pipes to be welded, and the sliding assembly provided can drive the clamped air-conditioning pipes to move towards each other, so that the surfaces to be welded are in contact, which is beneficial for subsequent welding processing.

[0021] Through the set welding assembly, the contact surface can be welded. At the same time, the set first servo motor drives the rotating shaft to rotate, and the rotating shaft drives the clamping assembly to rotate, so that the clamped air-conditioning pipe rotates, thereby facilitating the completion of a round of welding work on the contact surfaces of the two air-conditioning pipes, making the welding more complete.

[0022] The second mounting plate is pushed downward by the third servo electric cylinder, and the third servo motor drives the grinding wheel to rotate, so that the grinding wheel grinds the welding points of the two air-conditioning pipes. At the same time, the first servo motor drives the rotating shaft to rotate, and the rotating shaft drives the clamping assembly to rotate, so that the clamped air-conditioning pipe rotates, thereby facilitating the grinding of one circle of the contact surface of the two air-conditioning pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0024] Figure 1 It is a first isometric structural schematic diagram of the present invention.

[0025] Figure 2 It is a second isometric structural schematic diagram of the present invention.

[0026] Figure 3 It is a third isometric structural schematic diagram of the present invention.

[0027] Figure 4 The present invention Figure 3 Enlarged view of point A in .

[0028] Figure 5 The present invention Figure 3 Enlarged view of point B in .

[0029] In the figure: 1. fixed base; 2. sliding assembly; 21. positioning block; 22. second servo motor; 23. bidirectional lead screw; 24. slide rail; 25. slider; 3. transmission block; 4. moving plate; 5. first servo motor; 6. rotating shaft; 7. clamping assembly; 71. fixed plate; 72. bearing plate; 73. screw; 74. connecting block; 75. clamping top plate; 76. clamping bottom plate; 77. hexagonal knob; 78. limit rod; 8. side plate; 9. top plate; 10. moving seat; 11. guide rod; 12. guide block; 13. first servo electric cylinder; 14. welding assembly; 141. second servo electric cylinder; 142. first mounting plate; 143. welding gun; 15. grinding assembly; 151. third servo electric cylinder; 152. second mounting plate; 153. third servo motor; 154. grinding wheel. DETAILED DESCRIPTION

[0030] like Figure 1~Figure 5The cam is provided with a plurality of movable parts, and the movable part is provided with a plurality of movable parts, and the movable part has a plurality of movable parts, and the movable part has a plurality of movable parts.

[0031] Embodiment 1, like Figure 1-Figure 5 The welding device for repairing air-conditioning pipes comprises a fixed base 1, a sliding assembly 2 is fixedly arranged on the upper surface of the fixed base 1, both ends of the sliding assembly 2 are transmission-connected with a transmission block 3, a moving plate 4 is welded on the upper surface of the slider 25, a first servo motor 5 is fixedly installed on the outer surface of the moving plate 4, an output end of the first servo motor 5 is transmission-connected with a rotating shaft 6, a clamping assembly 7 is welded on the other end of the rotating shaft 6, two groups of side plates 8 are symmetrically welded on both ends of the upper surface of the fixed base 1, a top plate 9 is welded on the top of the two groups of side plates 8, and the top plate A moving seat 10 is slidably provided on the lower surface of 9, a guide rod 11 is welded between the two sets of side plates 8, a guide block 12 is welded on the outer surface of the moving seat 10, the guide rod 11 penetrates the guide block 12, and the guide block 12 is slidably connected to the guide rod 11, a first servo electric cylinder 13 is fixedly installed on the lower surface of the top plate 9, the output end of the first servo electric cylinder 13 is fixedly connected to one side surface of the moving seat 10, a welding assembly 14 is fixedly provided at one end of the lower surface of the moving seat 10, and a grinding assembly 15 is fixedly provided at the other end of the lower surface of the moving seat 10.

[0032] like Figure 1-Figure 3 The sliding assembly 2 includes a positioning block 21, a second servo motor 22 and a bidirectional screw 23. The positioning blocks 21 are provided with two groups. The two groups of positioning blocks 21 are symmetrically arranged on both sides of the fixed base 1. The two ends of the bidirectional screw 23 are arranged between the two groups of positioning blocks 21. The second servo motor 22 is fixedly installed on the outer surface of one group of positioning blocks 21, and the output end of the second servo motor 22 is transmission-connected with one end of the bidirectional screw 23, and the transmission block 3 is threadedly connected with the bidirectional screw 23; the bidirectional screw 23 is driven to rotate by the second servo motor 22, and the bidirectional screw 23 drives the transmission blocks 3 on both sides to approach each other, thereby completing the mutual movement of the clamping assembly 7.

[0033] like Figure 1-Figure 3, in order to increase the stability of the movable plate 4 when moving; the sliding assembly 2 also includes a slide rail 24 and a slider 25, the slide rail 24 is provided with four groups, the four groups of slide rails 24 are symmetrically arranged on both sides of the bidirectional screw rod 23, and the slider 25 is provided with four groups, the four groups of sliders 25 are symmetrically welded on the lower surfaces of the two groups of movable plates 4, and the slider 25 is slidably set on the slide rail 24.

[0034] like Figure 3-Figure 4 The clamping assembly 7 includes a fixing plate 71, a bearing plate 72, a screw 73, a connecting block 74, a clamping top plate 75 and a clamping bottom plate 76. One side of the fixing plate 71 is welded to one end of the rotating shaft 6, the bearing plate 72 is welded to the top of the fixing plate 71, the screw 73 is threadedly connected to the bearing plate 72, the connecting block 74 is rotatably arranged at the bottom of the screw 73, the upper surface of the clamping top plate 75 is welded to the lower surface of the connecting block 74, and one side of the clamping bottom plate 76 is welded to the inner surface of the fixing plate 71; by placing one end of the air-conditioning pipe to be clamped between the clamping top plate 75 and the clamping bottom plate 76, the clamping top plate 75 is driven to move by rotating the screw 73, so that the clamping top plate 75 and the clamping bottom plate 76 cooperate to clamp and fix the end of the air-conditioning pipe.

[0035] like Figure 4 In order to facilitate the rotation of the screw rod 73 and prevent the bearing plate 72 from rotating when the screw rod 73 rotates; a hexagonal knob 77 is welded on the top of the screw rod 73, and a limit rod 78 is welded on the upper surface of the connecting block 74, and the limit rod 78 passes through the bearing plate 72 and is slidably connected to the bearing plate 72.

[0036] like Figure 4 In order to facilitate the clamping of air conditioning pipes of different diameters, the clamping top plate 75 and the clamping bottom plate 76 are both set as V-shaped plates, and the clamping top plate 75 is slidably connected to the fixed plate 71. The first servo motor 5, the second servo motor 22, the first servo electric cylinder 13, the second servo electric cylinder 141, the third servo electric cylinder 151 and the third servo motor 153 are electrically connected to a controller, and the controller is connected to a control terminal through a wireless communicator. The controller is also electrically connected to a CCD camera and an alarm.

[0037] like Figure 5 The welding assembly 14 includes a second servo electric cylinder 141, a first mounting plate 142 and a welding gun 143. The second servo electric cylinder 141 is fixedly mounted on the lower surface of the movable seat 10, the first mounting plate 142 is fixedly arranged on the output end of the second servo electric cylinder 141, and the welding gun 143 is fixedly mounted on the lower surface of the first mounting plate 142; the welding gun 143 is driven to move by the second servo motor 22, so that the welding gun 143 can perform welding work on the contact surfaces of the two air-conditioning pipes.

[0038] like Figure 5The grinding assembly 15 includes a third servo electric cylinder 151, a second mounting plate 152, a third servo motor 153 and a grinding wheel 154. The third servo electric cylinder 151 is fixedly mounted on the lower surface of the movable seat 10, the second mounting plate 152 is fixedly arranged on the output end of the third servo electric cylinder 151, the third servo motor 153 is fixedly mounted on the lower surface of the second mounting plate 152, and the grinding wheel 154 is transmission-connected to the output end of the third servo motor 153; the grinding wheel 154 is pushed downward by the third servo electric cylinder 151, and the grinding wheel 154 is driven to rotate by the third servo motor 153, so that the grinding wheel 154 can grind the welding position.

[0039] The present invention also provides a method for using a welding device and method for repairing air-conditioning pipes, comprising the following steps: S1. Place two air-conditioning pipes to be welded on the clamping assemblies 7 on both sides, insert one end of the air-conditioning pipe between the clamping bottom plate 76 and the clamping top plate 75, and drive the clamping top plate 75 to move by rotating the screw 73, so that the clamping top plate 75 and the clamping bottom plate 76 cooperate to clamp and fix one end of the air-conditioning pipe; S2. The bidirectional screw rod 23 is driven to rotate by the first servo motor 5, and the bidirectional screw rod 23 drives the movable plate 4 to move through the transmission block 3, and the slider 25 slides on the slide rail 24, so that the clamping assemblies 7 on both sides are close to each other until the other ends of the two air conditioning pipes contact each other; S3. The welding assembly 14 works, and the second servo electric cylinder 141 pushes the welding gun 143 downward, so that the welding gun 143 welds the contact surfaces of the two air-conditioning pipes. At the same time, the first servo motor 5 drives the rotating shaft 6 to rotate, and the rotating shaft 6 drives the clamping assembly 7 to rotate, so that the clamped air-conditioning pipe rotates, and a circle of welding work on the contact surfaces of the two air-conditioning pipes is completed; S4. The welding assembly 14 stops working after being reset, and the movable seat 10 is pushed to move by the first servo cylinder 13, and the grinding assembly 15 is moved to the welding position; S5. The grinding assembly 15 works, and the second mounting plate 152 is pushed downward by the third servo electric cylinder 151, and the third servo motor 153 drives the grinding wheel 154 to rotate, so that the grinding wheel 154 grinds the welding parts of the two air-conditioning pipes. At the same time, the first servo motor 5 drives the rotating shaft 6 to rotate, and the rotating shaft 6 drives the clamping assembly 7 to rotate, so that the clamped air-conditioning pipes rotate, and the grinding work of one circle of the contact surfaces of the two air-conditioning pipes is completed; S6. The welding work is completed, all original parts are reset, and work stops.

[0040] In this embodiment, after S5, it also includes spraying the polished area. The first servo motor 5 drives the rotating shaft 6 to rotate, and the rotating shaft 6 drives the clamping assembly 7 to rotate, so that the clamped air-conditioning pipe rotates, completing a week of painting work on the contact surfaces of the two air-conditioning pipes.

[0041] The above-mentioned embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The embodiments and features in the embodiments of the present application can be arbitrarily combined with each other without conflict. The protection scope of the present invention shall be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A welding device for air conditioning pipeline maintenance, characterized in that: The invention comprises a fixed base (1), a sliding assembly (2) is fixedly arranged on the upper surface of the fixed base (1), both ends of the sliding assembly (2) are drivingly connected to a driving block (3), a moving plate (4) is welded on the upper surface of the slider (25), a first servo motor (5) is fixedly installed on the outer surface of the moving plate (4), an output end of the first servo motor (5) is drivingly connected to a rotating shaft (6), a clamping assembly (7) is welded to the other end of the rotating shaft (6), two groups of side plates (8) are symmetrically welded on the two ends of the upper surface of the fixed base (1), a top plate (9) is welded on the top of the two groups of side plates (8), and the lower surface of the top plate (9) is A moving seat (10) is slidably arranged, a guide rod (11) is welded between two sets of side plates (8), a guide block (12) is welded on the outer surface of the moving seat (10), the guide rod (11) penetrates the guide block (12), and the guide block (12) is slidably connected to the guide rod (11), a first servo electric cylinder (13) is fixedly installed on the lower surface of the top plate (9), an output end of the first servo electric cylinder (13) is fixedly connected to a side surface of the moving seat (10), a welding assembly (14) is fixedly arranged on one end of the lower surface of the moving seat (10), and a grinding assembly (15) is fixedly arranged on the other end of the lower surface of the moving seat (10).

2. The welding device for repairing air conditioning pipes according to claim 1 is characterized in that: The sliding assembly (2) comprises a positioning block (21), a second servo motor (22) and a bidirectional screw (23); the positioning block (21) is provided in two groups, the two groups of positioning blocks (21) are symmetrically arranged on both sides of the fixed base (1), the two ends of the bidirectional screw (23) are arranged between the two groups of positioning blocks (21), the second servo motor (22) is fixedly mounted on the outer surface of one group of positioning blocks (21), and the output end of the second servo motor (22) is transmission-connected to one end of the bidirectional screw (23), and the transmission block (3) is threadedly connected to the bidirectional screw (23).

3. The welding device for repairing air conditioning pipes according to claim 2 is characterized in that: The sliding assembly (2) further comprises a sliding rail (24) and a sliding block (25). The sliding rail (24) is provided in four groups, and the four groups of sliding rails (24) are symmetrically arranged on both sides of the bidirectional screw rod (23). The sliding block (25) is provided in four groups, and the four groups of sliding blocks (25) are symmetrically welded on the lower surfaces of the two groups of moving plates (4), and the sliding blocks (25) are slidably arranged on the sliding rails (24).

4. The welding device for repairing air conditioning pipes according to claim 1 is characterized in that: The clamping assembly (7) comprises a fixing plate (71), a bearing plate (72), a screw rod (73), a connecting block (74), a clamping top plate (75) and a clamping bottom plate (76); one side of the fixing plate (71) is welded to one end of the rotating shaft (6); the bearing plate (72) is welded to the top of the fixing plate (71); the screw rod (73) is threadedly connected to the bearing plate (72); the connecting block (74) is rotatably arranged at the bottom of the screw rod (73); the upper surface of the clamping top plate (75) is welded to the lower surface of the connecting block (74); and one side of the clamping bottom plate (76) is welded to the inner surface of the fixing plate (71).

5. The welding device for repairing air conditioning pipes according to claim 4 is characterized in that: A hexagonal knob (77) is welded on the top of the screw rod (73), and a limit rod (78) is welded on the upper surface of the connecting block (74). The limit rod (78) penetrates the bearing plate (72) and is slidably connected to the bearing plate (72).

6. The welding device for repairing air conditioning pipes according to claim 4 is characterized in that: The clamping top plate (75) and the clamping bottom plate (76) are both configured as V-shaped plates, and the clamping top plate (75) is slidably connected to the fixing plate (71).

7. The welding device for repairing air conditioning pipes according to claim 2 is characterized in that: The welding assembly (14) comprises a second servo electric cylinder (141), a first mounting plate (142) and a welding gun (143); the second servo electric cylinder (141) is fixedly mounted on the lower surface of the movable seat (10); the first mounting plate (142) is fixedly arranged on the output end of the second servo electric cylinder (141); and the welding gun (143) is fixedly mounted on the lower surface of the first mounting plate (142).

8. The welding device for repairing air conditioning pipes according to claim 7 is characterized in that: The grinding assembly (15) comprises a third servo electric cylinder (151), a second mounting plate (152), a third servo motor (153) and a grinding wheel (154); the third servo electric cylinder (151) is fixedly mounted on the lower surface of the movable seat (10); the second mounting plate (152) is fixedly arranged on the output end of the third servo electric cylinder (151); the third servo motor (153) is fixedly mounted on the lower surface of the second mounting plate (152); and the grinding wheel (154) is transmission-connected to the output end of the third servo motor (153).

9. The welding device for repairing air conditioning pipes according to claim 8 is characterized in that: The first servo motor (5), the second servo motor (22), the first servo electric cylinder (13), the second servo electric cylinder (141), the third servo electric cylinder (151), and the third servo motor (153) are electrically connected to a controller, and the controller is connected to a control terminal via a wireless communicator. The controller is also electrically connected to a CCD camera and an alarm.

10. The method for using the welding device for repairing air conditioning pipes according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Place the two air-conditioning pipes to be welded on the clamping assemblies (7) on both sides, insert one end of the air-conditioning pipe between the clamping bottom plate (76) and the clamping top plate (75), and drive the clamping top plate (75) to move by rotating the screw rod (73), so that the clamping top plate (75) and the clamping bottom plate (76) cooperate to clamp and fix one end of the air-conditioning pipe; S2. The bidirectional screw rod (23) is driven to rotate by the first servo motor (5), and the bidirectional screw rod (23) drives the movable plate (4) to move through the transmission block (3), and at the same time, the slider (25) slides on the slide rail (24), so that the clamping assemblies (7) on both sides are close to each other until the other ends of the two air conditioning pipes contact each other; S3. The welding assembly (14) works, and the second servo electric cylinder (141) pushes the welding gun (143) to move downward, so that the welding gun (143) welds the contact surfaces of the two air-conditioning pipes. At the same time, the first servo motor (5) drives the rotating shaft (6) to rotate, and the rotating shaft (6) drives the clamping assembly (7) to rotate, so that the clamped air-conditioning pipe rotates, and a circle of welding work on the contact surfaces of the two air-conditioning pipes is completed; S4. After the welding assembly (14) is reset, the work is stopped, and the movable seat (10) is pushed to move by the first servo cylinder (13), and the grinding assembly (15) is moved to the welding position; S5. The grinding assembly (15) works, and the second mounting plate (152) is pushed downward by the third servo electric cylinder (151), and the third servo motor (153) drives the grinding wheel (154) to rotate, so that the grinding wheel (154) grinds the welding parts of the two air-conditioning pipes. At the same time, the first servo motor (5) drives the rotating shaft (6) to rotate, and the rotating shaft (6) drives the clamping assembly (7) to rotate, so that the clamped air-conditioning pipe rotates, and a round of grinding of the contact surfaces of the two air-conditioning pipes is completed; S6. The welding work is completed, all the original parts are reset, and the work is stopped; After S5, the polished area is also subjected to spraying treatment, wherein the first servo motor (5) drives the rotating shaft (6) to rotate, and the rotating shaft (6) drives the clamping assembly (7) to rotate, so that the clamped air-conditioning pipe rotates, completing a circle of spraying paint on the contact surfaces of the two air-conditioning pipes.

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