Automatic welding device for air conditioner compressor copper pipe

Abstract

The invention relates to the technical field of welding equipment, and particularly discloses an air conditioner compressor copper pipe automatic welding device which comprises a copper pipe, a moving column is slidably mounted in the copper pipe, a fixing sleeve is slidably mounted on the outer wall of the copper pipe, an annular arc-shaped groove is formed in the middle end of the outer wall of the fixing sleeve, and a welding mechanism is arranged in the arc-shaped groove. Fixing grooves are formed in the two ends of the moving column, mounting bases are mounted on the inner walls of the fixing grooves, electric rotating shafts are rotatably mounted at the ends, away from the inner walls of the fixing grooves, of the mounting bases, a connecting wire is connected to the end, away from the mounting bases, of one electric rotating shaft, and first connecting grooves are formed in the outer walls of the two ends of the moving column. According to the welding device, the connecting positions of the inner walls and the outer walls of the two copper pipes can be welded at the same time, and two different welding modes are adopted for the connecting positions of the inner walls and the outer walls of the two copper pipes.

Description

Technical Field

[0001] The present invention relates to the technical field of welding equipment, and particularly relates to an automatic welding device for copper pipes of an air-conditioning compressor. Background Art

[0002] Air-conditioning copper pipes usually refer to air-conditioning refrigerant pipes, which are used in an air-conditioning system for the pipelines through which the refrigerant flows to connect the main refrigeration components such as heat exchangers, valves, and compressors. According to actual installation requirements, welding extension is needed. The outer walls of the connecting positions of two copper pipes to be connected are welded, and after welding is completed, the welding position is polished.

[0003] When the existing welding equipment welds air-conditioning copper pipes, the welding method for the copper pipes is a single welding from the outer wall of the copper pipe, and small gaps still remain at the welding positions on the inner wall of the copper pipe, which will affect both the quality and the use of the copper pipe. Moreover, after the welding position is polished, the overall thickness of the welding position is thinner than that of the copper pipe. After long-term use, it is easy to corrode, damage, and leak, and it is impossible to synchronously weld and polish the inner and outer walls of the copper pipe. Summary of the Invention

[0004] The purpose of the present invention is to solve the deficiencies existing in the prior art, and to propose an automatic welding device for copper pipes of an air-conditioning compressor.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions: An automatic welding device for copper pipes of an air-conditioning compressor, including a copper pipe. A moving column is slidably installed inside the copper pipe, and a fixed sleeve is slidably installed on the outer wall of the copper pipe. An annular arc-shaped groove is opened in the middle of the outer wall of the fixed sleeve, and a welding mechanism is arranged inside the arc-shaped groove. Fixing grooves are opened at both ends of the moving column, mounting seats are installed on the inner walls of the fixing grooves, and electric rotating shafts are rotatably installed at one ends of the mounting seats away from the inner walls of the fixing grooves. One of the electric rotating shafts is connected with a connecting wire at the end away from the mounting seat. First connecting grooves are opened on the outer walls at both ends of the moving column, and grinding mechanisms are arranged at both ends of the moving column.

[0006] Preferably, the grinding mechanism includes a second fixing ring. One end of the second fixing ring is threadedly installed inside the first connecting groove. An annular first clamping groove is opened on the outer wall of the end of the second fixing ring away from the moving column. An annular first rubber airbag is installed on the inner wall of the first clamping groove, and a plurality of first grinding pieces are installed on the outer wall of the first rubber airbag.

[0007] Preferably, the welding mechanism includes two telescopic welding heads. Annular chutes are opened on the inner walls at both ends of the arc-shaped groove. Electric sliders are slidably installed inside the chutes. The bottom end of the telescopic welding head is installed at one end of the electric slider away from the inner wall of the chute. A placement groove is opened on the inner wall of the arc-shaped groove. The placement groove is located between the two chutes. Feeding holes are opened on the side surfaces of the bottom ends of the two telescopic welding heads.

[0008] Preferably, a plurality of grooves are opened on the outer walls at both ends of the moving column. Electromagnetic iron sheets are installed on the inner walls of the grooves. Installation holes are opened on the outer wall of the moving column between two adjacent grooves. A limiting rod is slidably installed inside the installation hole. One end of the limiting rod located inside the fixed groove is rotatably installed with a fixed rod.

[0009] Preferably, a fixed disk is installed on the outer wall of the electric rotating shaft. One end of the fixed rod is installed on the side surface of the fixed disk. A sliding hole is opened on the side surface of the limiting rod in the length direction. A support rod is slidably installed inside the sliding hole. The two ends of the support rod are respectively installed on the inner walls on both sides of the installation hole. One end of the limiting rod away from the fixed disk abuts against the inner wall of the copper tube.

[0010] Preferably, annular second connection grooves are opened at both ends of the outer wall of the fixed sleeve. First fixing rings are installed at both ends of the fixed sleeve. One end of the first fixing ring is threadedly installed inside the second connection groove. A retaining ring is installed on the inner wall of the first fixing ring. A second rubber airbag is installed on the inner wall of the first fixing ring.

[0011] Preferably, one end of the second rubber airbag abuts against the side surface of the retaining ring. A plurality of second grinding pieces are installed on the inner wall of the second rubber airbag. Second clamping grooves are opened on the inner walls at both ends of the fixed sleeve. Electromagnetic iron rings are installed on the inner walls of the second clamping grooves.

[0012] Preferably, an annular storage groove is opened on the inner wall of the fixed sleeve. A C-shaped heating plate is installed on the inner wall of the storage groove. An annular welding piece is installed inside the storage groove. The inner wall of the welding piece abuts against the outer wall of the copper tube.

[0013] Preferably, the storage groove is located between the two second clamping grooves. A through hole is opened at the inner top of the storage groove. The through hole is located between the two ends of the heating plate. Annular anti-slip rings are installed at both ends of the outer wall of the fixed sleeve.

[0014] Preferably, one end of the connecting wire away from the moving column penetrates through the copper tube. A rubber block is provided at one end of the limiting rod away from the fixed disk.

[0015] Compared with the prior art, the beneficial effects of the present invention are: The present invention can simultaneously weld the connection positions of the inner walls and outer walls of the two copper tubes, and the welding method of the connection positions of the inner walls and outer walls of the two copper tubes adopts two different welding methods, and the inner wall and the outer wall of the copper tube are welded, so that the connection positions of the two copper tubes can be better welded, so that the welding effect of the copper tube is better, and a better sealing effect can be achieved when in use, and when the welding positions of the inner walls and the outer walls of the copper tube are polished, the polishing of the welding positions of the inner walls of the copper tubes is performed by reciprocating movement of a moving column and a first polishing sheet inside the copper tube for polishing, and the polishing of the welding positions of the outer walls of the copper tubes is performed by rotating a fixed sleeve and a second polishing sheet on the outer wall of the copper tube to polish the welding positions.

[0016] In the present invention, when welding the connection positions of the inner walls of two copper tubes, the first grinding sheet is brought into contact with the welding positions of the inner walls of the copper tubes by the expansion caused by the inflation of the first rubber airbag, and the first grinding sheet is reciprocated inside the copper tube by the frequent inflation and deflation of the first rubber airbag and the pulling of the connecting line and the magnetic field adsorption between the electromagnet ring and the electromagnet sheet to achieve the grinding of the welding positions of the inner walls of the copper tubes, and the staff can drive the movable column suspended inside the copper tube to rotate the angle by rotating the connecting line, so that a plurality of first grinding sheets can comprehensively grind the welding positions of the inner walls of the copper tubes.

[0017] In the present invention, the electromagnet sheets on the outer walls at both ends of the moving column correspond to the electromagnet rings on the inner walls at both ends of the fixed sleeve through the magnetic field. When in use, the electromagnet ring can limit the position of the moving column inside the copper tube through the magnetic field between the electromagnet sheet and the electromagnet sheet. At the same time, when in use, the moving column can be kept suspended inside the copper tube. When the position of the moving column is offset, it is convenient to accurately move the position of the moving column through the magnetic field adsorption between the electromagnet ring and the electromagnet sheet, so that the central axis of the moving column is consistent with the central axis of the copper tube. When in use, the distance between different positions of the outer wall of the moving column and the inner wall of the copper tube can be kept consistent, and the front and rear positions of the moving column can be limited.

[0018] In the present invention, when welding the inner wall of the copper tube, the telescopic welding head welds the inner wall gap through the welding wire, and when welding the outer wall gap of the copper tube, the welding effect is achieved by heating the welding sheet. At the same time, the first fixing ring and the second fixing ring used for grinding are respectively threadedly installed on the fixing sleeve and the movable column. When in use, the staff can install and disassemble the first fixing ring and the second fixing ring at any time according to the usage situation, which is more convenient to use. When in use, the two first fixing rings can increase the overall length of the fixing sleeve, so that the position where the outer walls of the two copper tubes abut against the fixing sleeve and the inner walls of the first fixing ring is larger, and the welding position of the two copper tubes is more stable during welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1A three-dimensional view of an automatic welding device for copper pipes of an air-conditioning compressor proposed by the present invention; Figure 2 A cross-sectional view of the copper pipe of an automatic welding device for copper pipes of an air-conditioning compressor proposed by the present invention; Figure 3 A cross-sectional view of the moving column of an automatic welding device for copper pipes of an air-conditioning compressor proposed by the present invention; Figure 4 A schematic diagram of the installation structure of the second fixing ring of an automatic welding device for copper pipes of an air-conditioning compressor proposed by the present invention; Figure 5 A schematic diagram of the structure of the moving column of an automatic welding device for copper pipes of an air-conditioning compressor proposed by the present invention; Figure 6 A schematic diagram of the structure of the fixing plate of an automatic welding device for copper pipes of an air-conditioning compressor proposed by the present invention; Figure 7 A schematic diagram of the installation structure of the first fixing ring of an automatic welding device for copper pipes of an air-conditioning compressor proposed by the present invention; Figure 8 A cross-sectional view of the fixing sleeve of an automatic welding device for copper pipes of an air-conditioning compressor proposed by the present invention.

[0020] In the figure: 1, copper pipe; 2, fixing sleeve; 3, first fixing ring; 4, connecting wire; 5, through hole; 6, anti-slip ring; 7, moving column; 8, arc groove; 9, placing groove; 10, sliding groove; 11, electric slider; 12, telescopic welding head; 13, fixing groove; 14, second fixing ring; 15, first rubber airbag; 16, first grinding piece; 17, mounting seat; 18, electric rotating shaft; 19, mounting hole; 20, limiting rod; 21, sliding hole; 22, groove; 23, electromagnet sheet; 24, support rod; 25, first connecting groove; 26, welding piece; 27, fixing plate; 28, fixing rod; 29, second rubber airbag; 30, second grinding piece; 31, storage groove; 32, first card slot; 33, heating plate; 34, second card slot; 35, electromagnet coil; 36, second connecting groove; 37, retaining ring. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0022] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0023] Referring to Figure 1-8 , an automatic welding device for copper pipes of an air-conditioning compressor, includes a copper pipe 1. A moving column 7 is slidably installed inside the copper pipe 1. A fixed sleeve 2 is slidably installed on the outer wall of the copper pipe 1. An annular arc-shaped groove 8 is formed in the middle of the outer wall of the fixed sleeve 2. A welding mechanism is provided inside the arc-shaped groove 8. Fixing grooves 13 are formed at both ends of the moving column 7. A mounting seat 17 is installed on the inner wall of the fixing groove 13. An electric rotating shaft 18 is rotatably installed at one end of the mounting seat 17 away from the inner wall of the fixing groove 13. One end of an electric rotating shaft 18 away from the mounting seat 17 is connected with a connecting wire 4. First connecting grooves 25 are formed on the outer walls at both ends of the moving column 7. Grinding mechanisms are provided at both ends of the moving column 7.

[0024] As a technical optimization scheme of the present invention, the grinding mechanism includes a second fixing ring 14. One end of the second fixing ring 14 is threadedly installed inside the first connecting groove 25. An annular first clamping groove 32 is formed on the outer wall of the second fixing ring 14 away from the moving column 7. An annular first rubber airbag 15 is installed on the inner wall of the first clamping groove 32. A plurality of first grinding pieces 16 are installed on the outer wall of the first rubber airbag 15. After the welding at the inner wall gap position of the copper pipe 1 is completed, the staff can move the position of the moving column 7 and make the first rubber airbag 15 expand, pushing the first grinding pieces 16 on its outer wall to abut against the welding position on the inner wall of the copper pipe 1. Through the reciprocating movement of the moving column 7, the first grinding pieces 16 polish the welding position, and the staff can adjust the angle of the first grinding pieces 16 through the magnetic adsorption between the fixed sleeve 2 and the moving column 7.

[0025] As a technical optimization scheme of the present invention, the welding mechanism includes two telescopic welding heads 12. Annular sliding grooves 10 are formed on the inner walls at both ends of the arc-shaped groove 8. Electric sliders 11 are slidably installed inside the sliding grooves 10. The bottom end of the telescopic welding head 12 is installed at one end of the electric slider 11 away from the inner wall of the sliding groove 10. A placement groove 9 is formed on the inner wall of the arc-shaped groove 8. The placement groove 9 is located between the two sliding grooves 10. Feeding holes are formed on the side surfaces of the bottom ends of the two telescopic welding heads 12. The welding wire to be used for welding is wound and installed inside the placement groove 9, and one end of the welding wire is connected with the telescopic welding head 12, which is convenient for the telescopic welding head 12 to weld the inner wall gap of the copper pipe 1.

[0026] As a technical optimization solution of the present invention, a plurality of grooves 22 are formed on the outer walls at both ends of the moving column 7. An electromagnet sheet 23 is installed on the inner wall of the groove 22. Installation holes 19 are formed on the outer wall of the moving column 7 between two adjacent grooves 22. A limiting rod 20 is slidably installed inside the installation hole 19. One end of the limiting rod 20 located inside the fixed groove 13 is rotatably installed with a fixing rod 28. The electric rotating shaft 18 can adjust the positions and angles of a plurality of limiting rods 20 through the fixed disk 27, which is convenient for storing the limiting rods 20. At the same time, a plurality of limiting rods 20 can cooperate with each other to fix the position of the moving column 7 inside the copper tube 1.

[0027] As a technical optimization solution of the present invention, a fixed disk 27 is installed on the outer wall of the electric rotating shaft 18. One end of the fixing rod 28 is installed on the side surface of the fixed disk 27. A sliding hole 21 is formed on the side surface of the limiting rod 20 in the length direction. A support rod 24 is slidably installed inside the sliding hole 21. Both ends of the support rod 24 are respectively installed on the inner walls on both sides of the installation hole 19. The end of the limiting rod 20 away from the fixed disk 27 abuts against the inner wall of the copper tube 1. The support rod 24 can play a good role in position limitation and support for the position of the limiting rod 20 during use.

[0028] As a technical optimization solution of the present invention, annular second connection grooves 36 are formed at both ends of the outer wall of the fixed sleeve 2. First fixing rings 3 are installed at both ends of the fixed sleeve 2. One end of the first fixing ring 3 is threadedly installed inside the second connection groove 36. A retaining ring 37 is installed on the inner wall of the first fixing ring 3. A second rubber airbag 29 is installed on the inner wall of the first fixing ring 3. During use, the staff can install and disassemble the first fixing ring 3 at any time according to the grinding requirements, which is more convenient to use.

[0029] As a technical optimization solution of the present invention, one end of the second rubber airbag 29 abuts against the side surface of the retaining ring 37. A plurality of second grinding pieces 30 are installed on the inner wall of the second rubber airbag 29. Second clamping grooves 34 are formed on the inner walls at both ends of the fixed sleeve 2. An electromagnet coil 35 is installed on the inner wall of the second clamping groove 34. The second rubber airbag 29 can make the second grinding pieces 30 abut against the welding position on the outer wall of the copper tube 1 through inflation, and the second grinding pieces 30 can grind the welding position by rotating the fixed sleeve 2.

[0030] As a technical optimization solution of the present invention, an annular storage groove 31 is provided on the inner wall of the fixed sleeve 2. A C-shaped heating plate 33 is installed on the inner wall of the storage groove 31. An annular welding piece 26 is installed inside the storage groove 31. The inner wall of the welding piece 26 abuts against the outer wall of the copper pipe 1. The welding piece 26 is a soldering piece for brazing. The melting point of the welding piece 26 is lower than that of the copper pipe 1. When in use, the welding method on the outer wall of the copper pipe 1 is different from that on the inner wall. The inner wall and the outer wall positions of the copper pipe 1 can be welded by two welding methods respectively.

[0031] As a technical optimization solution of the present invention, the storage groove 31 is located between two second clamping grooves 34. A through hole 5 is provided at the inner top of the storage groove 31. The through hole 5 is located between the two ends of the heating plate 33. Annular anti-slip rings 6 are installed at both ends of the outer wall of the fixed sleeve 2. When in use, the staff can check the positions of the fixed sleeve 2 and the welding piece 26 inside it through the through hole 5 when moving the fixed sleeve 2.

[0032] As a technical optimization solution of the present invention, the end of the connecting wire 4 away from the moving column 7 penetrates through the copper pipe 1. A rubber block is provided at the end of the limiting rod 20 away from the fixed disk 27. The rubber block can play a good protective role on the inner wall of the copper pipe 1 when the limiting rod 20 abuts against and fixes the inner wall of the copper pipe 1 during use, preventing the inner wall of the copper pipe 1 from being indented due to excessive clamping force of the limiting rod 20 on the inner wall of the copper pipe 1.

[0033] When the present invention is in use, the staff first threadedly installs two first fixing rings 3 at both ends of the fixed sleeve 2, and inserts one of the copper pipes 1 to be connected into the inner part of one end of the fixed sleeve 2. The staff can understand the position of the end of the copper pipe 1 inside the fixed sleeve 2 through the through hole 5 on the outer wall of the fixed sleeve 2, and adjust the position of the fixed sleeve 2 at any time according to the position of the copper pipe 1 inside the fixed sleeve 2, so that the end of the copper pipe 1 close to the inside of the fixed sleeve 2 is located directly below the through hole 5. The staff inflates the inside of the second rubber airbag 29 on the inner wall of the first fixing ring 3 close to the copper pipe 1, so that the second rubber airbag 29 expands and pushes the second grinding pieces 30 on its inner wall, so that a plurality of second grinding pieces 30 abut against the inner wall of the copper pipe 1, and the positions of the fixed sleeve 2, the first fixing ring 3 and the copper pipe 1 can be fixed during use.

[0034] The staff winds and installs the welding piece 26 to be used for brazing on the outer wall of one end of the copper tube 1 located inside the fixing sleeve 2, and inserts another copper tube 1 to be welded into the inside of the fixing sleeve 2, so that the ends of the two copper tubes 1 located inside the fixing sleeve 2 are in contact with each other. At the same time, the inner walls on both sides of the welding piece 26 are respectively located on the outer walls of the two copper tubes 1, and the staff inflates the second rubber air bag 29 on the inner wall of another first fixing ring 3, so that the second grinding piece 30 on its inner wall is in contact with the outer wall of the copper tube 1. During use, the two first fixing rings 3 can increase the overall length of the fixing sleeve 2, making the contact positions between the outer walls of the two copper tubes 1 and the inner walls of the fixing sleeve 2 and the first fixing rings 3 larger, and making the welding positions of the two copper tubes 1 more stable during welding.

[0035] During use, the electromagnet coils 35 on the inner walls at both ends of the fixing sleeve 2 are energized with an external power supply to generate a magnetic field. The staff threadedly installs the two second fixing rings 14 at both ends of the moving column 7, connects the external connecting wire 4 to one of the electric rotating shafts 18, inserts the end of the moving column 7 away from the connecting wire 4 into the inside of the copper tube 1, and slides the moving column 7 inside the copper tube 1 towards the direction of the fixing sleeve 2 until the moving column 7 is located inside the fixing sleeve 2, and the middle of the outer wall of the moving column 7 is located between the welding positions of the two copper tubes 1. The electromagnet pieces 23 on the outer walls at both ends of the moving column 7 respectively correspond to the electromagnet coils 35 on the inner walls at both ends of the fixing sleeve 2 through the magnetic field. During use, the electromagnet coil 35 can limit the position of the moving column 7 inside the copper tube 1 through the magnetic field with the electromagnet piece 23. At the same time, during use, the moving column 7 can be suspended inside the copper tube 1, making the central axis of the moving column 7 coincide with the central axis of the copper tube 1. During use, it can not only make the distances between different positions on the outer wall of the moving column 7 and the inner wall of the copper tube 1 consistent, but also limit the front and back positions of the moving column 7.

[0036] The electric rotating shaft 18 drives the fixed disk 27 on its outer wall to rotate. When the fixed disk 27 rotates, it can push the end of the limiting rod 20 close to the fixed disk 27 through the fixed rod 28 on its side, so that the limiting rod 20 moves on the support rod 24 on the inner wall of the mounting hole 19. At the same time, the end of the limiting rod 20 away from the fixed disk 27 moves towards the inner wall of the copper tube 1 until the rubber block on the end of the limiting rod 20 away from the fixed disk 27 abuts against the inner wall of the copper tube 1. During use, several limiting rods 20 located at both ends of the moving column 7 are all in contact with the inner wall of the copper tube 1. During use, the several limiting rods 20 can respectively limit and support and fix both ends of the moving column 7 through the inner wall of the copper tube 1, so that the moving column 7 is more stable when welding the copper tube 1 and will not move or rotate. At the same time, the electromagnet coil 35 on the fixed sleeve 2 can also limit the position of the moving column 7 through the magnetic field, and fix the moving column 7 in multiple ways. At the same time, the moving column 7 can also fix the position of the fixed sleeve 2 through the magnetic field. When the fixed sleeve 2 moves and deviates in position, the staff can move the fixed sleeve 2 on the outer wall of the copper tube 1. When the fixed sleeve 2 moves to the specified position, the magnetic field generated by the electromagnet piece 23 can adsorb the fixed sleeve 2 and move it accurately to the specified position.

[0037] During use, a welding wire is wound and installed inside the placement groove 9 on the moving column 7, and one end of the welding wire is connected to the telescopic welding head 12. When welding is required at a position to be welded on the inner wall of the copper pipe 1, the top end of the telescopic welding head 12 moves towards the inner wall of the copper pipe 1 until one end of the welding wire abuts against the position to be welded on the inner wall of the copper pipe 1 through the telescopic welding head 12. The telescopic welding head 12 heats the position where the welding wire abuts against the welding gap of the copper pipe 1 to weld the gap position of the copper pipe 1. The electric slider 11 drives the telescopic welding head 12 to rotate at both ends of the inner wall of the arc-shaped groove 8. When the telescopic welding head 12 moves, the welding wire can be gradually pulled, and the welding wire gradually passes through the telescopic welding head 12 to weld the gap positions of the two copper pipes 1. When the telescopic welding head 12 welds the inner wall gap of the copper pipe 1, the heating plate 33 on the inner wall of the fixed sleeve 2 heats the welding piece 26 on the outer wall gap of the two copper pipes 1 to melt the welding piece 26 and weld the connection position of the outer walls of the two copper pipes 1. At the same time, the staff can adjust the size of the gap between the two copper pipes 1 so that part of the melted welding piece 26 will flow into the gap between the two copper pipes 1. After the welding piece 26 melts and solidifies again, the connection position of the outer walls of the two copper pipes 1 can be welded. The welding method for the inner wall gap of the copper pipe 1 is arc welding. During arc welding, the welding wire is both the filler metal and the conductive electrode. The telescopic welding head 12 is powered through the connection wire 4. The telescopic welding head 12 transports one end of the welding wire to the inner wall gap position of the copper pipe 1. Under a specified voltage, a discharge phenomenon occurs between the welding wire and the copper pipe 1 to form an arc. The arc heats and melts the welding wire near the inner wall gap position of the copper pipe 1, and the melted welding wire adheres to the surface and inside of the inner wall gap of the copper pipe 1 to achieve the welding effect.

[0038] After the welding is completed at the connection positions of the inner and outer walls of both copper tubes 1, the staff can retract the limiting rod 20 into the fixing groove 13 through the electric rotating shaft 18 and the fixing plate 27. At the same time, inflate the two first rubber air bags 15 to make the first rubber air bags 15 expand, and push the first grinding pieces 16 on their outer walls to abut against the inner wall of the copper tube 1. The staff drives the moving column 7 and the second fixing ring 14 to move inside the copper tube 1 by pulling the connecting wire 4. When the several first grinding pieces 16 move, they can grind the welding positions on the inner wall of the copper tube 1. After the first grinding pieces 16 move to one side of the welding position, release the gas inside the first rubber air bags 15 to make the first grinding pieces 16 move towards the direction of the second fixing ring 14. The fixing sleeve 2 makes the moving column 7 move towards the welding position through the magnetic field adsorption of the electromagnetic sheet 23 on it and the electromagnetic coil 35 until the first grinding pieces 16 move to the other side of the welding position. Then, inflate the first rubber air bags 15 again and pull the moving column 7 and the first grinding pieces 16 to move through the connecting wire 4. In this way, the first grinding pieces 16 reciprocally grind the welding positions on the inner wall of the copper tube 1. The staff can drive the moving column 7 suspended inside the copper tube 1 to rotate in angle by rotating the connecting wire 4, so that the several first grinding pieces 16 can comprehensively grind the welding positions on the inner wall of the copper tube 1.

[0039] After the staff finishes grinding the welding positions on the inner wall of the copper tube 1, they can pull out the moving column 7 from the copper tube 1 by pulling the connecting wire 4 and move the fixing sleeve 2 so that the welding position on the outer wall of the copper tube 1 is located inside one of the second rubber air bags 29. Then, inflate the two second rubber air bags 29 to make several second grinding pieces 30 on the inner wall of the second rubber air bags 29 abut against the welding positions on the outer wall of the copper tube 1. The staff can drive the fixing sleeve 2 to rotate through the anti-slip ring 6. When the fixing sleeve 2 rotates, it can drive the second grinding pieces 30 to grind the welding positions on the outer wall of the copper tube 1 through the first fixing ring 3 and the second rubber air bags 29. There are several tooth grooves on the outer wall of the anti-slip ring 6. The staff can drive the anti-slip ring 6 and the fixing sleeve 2 to rotate through an external transmission mechanism and drive the second grinding pieces 30 to grind the welding positions on the outer wall of the copper tube 1. When in use, the welding method for the connection positions of the inner and outer walls of the two copper tubes 1 adopts two different welding methods, and both the inner and outer walls of the copper tube 1 are welded, which can weld the connection positions of the two copper tubes 1 better, making the welding effect of the copper tube 1 better. When in use, it can have a better sealing effect. When grinding the welding positions on the inner and outer walls of the copper tube 1, the grinding of the welding positions on the inner wall of the copper tube 1 is carried out by the reciprocating movement of the moving column 7 and the first grinding pieces 16 inside the copper tube 1, while the grinding of the welding positions on the outer wall of the copper tube 1 is carried out by the rotation of the fixing sleeve 2 and the second grinding pieces 30 on the outer wall of the copper tube 1 for the welding positions.

[0040] As described above, it is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes should be covered within the protection scope of the present invention.

Claims

1. An automatic welding device for copper tubes of air conditioner compressors, comprising a copper tube (1), characterized in that: A movable column (7) is slidably mounted inside the copper tube (1), a fixed sleeve (2) is slidably mounted on the outer wall of the copper tube (1), an annular arc groove (8) is provided at the middle end of the outer wall of the fixed sleeve (2), a welding mechanism is provided inside the arc groove (8), both ends of the movable column (7) are provided with a fixed groove (13), a mounting seat (17) is mounted on the inner wall of the fixed groove (13), an electric rotating shaft (18) is rotatably mounted on one end of the mounting seat (17) away from the inner wall of the fixed groove (13), one end of the electric rotating shaft (18) away from the mounting seat (17) is connected to a connecting line (4), both ends of the movable column (7) are provided with a first connecting groove (25), and both ends of the movable column (7) are provided with a grinding mechanism.

2. The automatic welding device for copper tube of air conditioner compressor according to claim 1, characterized in that: The grinding mechanism comprises a second fixing ring (14), one end of the second fixing ring (14) is threadedly mounted inside the first connecting groove (25), an annular first clamping groove (32) is formed on the outer wall of the end of the second fixing ring (14) away from the movable column (7), an annular first rubber airbag (15) is mounted on the inner wall of the first clamping groove (32), and a plurality of first grinding sheets (16) are mounted on the outer wall of the first rubber airbag (15).

3. The automatic welding device for copper tube of air conditioner compressor according to claim 1, characterized in that: The welding mechanism comprises two telescopic welding heads (12), annular slide grooves (10) are provided on the inner walls at both ends of the arc groove (8), an electric slider (11) is slidably installed inside the slide groove (10), the bottom end of the telescopic welding head (12) is installed at the end of the electric slider (11) away from the inner wall of the slide groove (10), a placement groove (9) is provided on the inner wall of the arc groove (8), the placement groove (9) is located between the two slide grooves (10), and a feeding hole is provided on the side surfaces of the bottom ends of the two telescopic welding heads (12).

4. The automatic welding device for copper tube of air conditioner compressor according to claim 1, characterized in that: A plurality of grooves (22) are provided on the outer walls of both ends of the movable column (7), and an electromagnet sheet (23) is mounted on the inner walls of the grooves (22). A mounting hole (19) is provided on the outer wall of the movable column (7) between two adjacent grooves (22), and a limit rod (20) is slidably mounted inside the mounting hole (19), and a fixed rod (28) is rotatably mounted on one end of the limit rod (20) located inside the fixed groove (13).

5. The automatic welding device for copper tubes of air conditioner compressors according to claim 4 is characterized in that: A fixing plate (27) is mounted on the outer wall of the electric rotating shaft (18), one end of the fixing rod (28) is mounted on the side of the fixing plate (27), a sliding hole (21) is opened on the side of the limiting rod (20) in the length direction, a support rod (24) is slidably mounted inside the sliding hole (21), two ends of the support rod (24) are respectively mounted on the inner walls of both sides of the mounting hole (19), and one end of the limiting rod (20) away from the fixing plate (27) is in contact with the inner wall of the copper tube (1).

6. The automatic welding device for copper tubes of air conditioner compressors according to claim 1 is characterized in that: Both ends of the outer wall of the fixing sleeve (2) are provided with an annular second connecting groove (36), both ends of the fixing sleeve (2) are provided with a first fixing ring (3), one end of the first fixing ring (3) is threadedly installed inside the second connecting groove (36), a retaining ring (37) is installed on the inner wall of the first fixing ring (3), and a second rubber airbag (29) is installed on the inner wall of the first fixing ring (3).

7. The automatic welding device for copper tubes of air conditioner compressors according to claim 6, characterized in that: One end of the second rubber airbag (29) abuts against the side surface of the retaining ring (37), a plurality of second grinding sheets (30) are mounted on the inner wall of the second rubber airbag (29), second slots (34) are formed on the inner walls of both ends of the fixing sleeve (2), and an electromagnet ring (35) is mounted on the inner wall of the second slot (34).

8. The automatic welding device for copper tubes of air conditioner compressors according to claim 7, characterized in that: An annular storage groove (31) is provided on the inner wall of the fixing sleeve (2), a C-shaped heating plate (33) is installed on the inner wall of the storage groove (31), an annular welding sheet (26) is installed inside the storage groove (31), and the inner wall of the welding sheet (26) abuts against the outer wall of the copper tube (1).

9. The automatic welding device for copper tubes of air conditioner compressors according to claim 8, characterized in that: The storage groove (31) is located between the two second clamping grooves (34), a through hole (5) is provided at the inner top of the storage groove (31), the through hole (5) is located between the two ends of the heating plate (33), and an annular anti-slip ring (6) is installed at both ends of the outer wall of the fixing sleeve (2).

10. The automatic welding device for copper tubes of air conditioner compressors according to claim 5, characterized in that: The end of the connecting wire (4) away from the movable column (7) passes through the copper tube (1), and the end of the limiting rod (20) away from the fixed plate (27) is provided with a rubber block.

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