An automatic welding device for copper tubes of air-conditioning compressors

Abstract

The present invention relates to the technical field of welding equipment, and specifically discloses an automated welding device for copper tubes of air-conditioning compressors, comprising a copper tube, wherein a movable column is slidably installed inside the copper tube, a fixed sleeve is slidably installed on the outer wall of the copper tube, an annular arc groove is provided at the middle end of the outer wall of the movable column, a welding mechanism is provided inside the arc groove, both ends of the movable column are provided with a fixed groove, a mounting seat is installed on the inner wall of the fixed groove, an electric shaft is rotatably installed at one end of the mounting seat away from the inner wall of the fixed groove, one end of the electric shaft away from the mounting seat is connected to a connecting line, and a first connecting groove is provided on the outer wall of both ends of the movable column. The present invention can simultaneously weld the connection position of the inner and outer walls of two copper tubes, and the welding method of the connection position of the inner and outer walls of the two copper tubes adopts two different welding methods.

Description

Technical Field

[0001] The present invention relates to the technical field of welding equipment, and in particular to an automatic welding device for copper tubes of air-conditioning compressors. Background Art

[0002] Air conditioning copper pipes typically refer to refrigerant pipes used in air conditioning systems, connecting heat exchangers, valves, compressors, and other key refrigeration components through which the refrigerant flows. Depending on the installation requirements, welding extensions are required. The outer walls of the connecting point between the two copper pipes to be connected are welded and then polished.

[0003] When welding air-conditioning copper tubes, existing welding equipment only welds from the outer wall of the copper tube, and the welding position of the inner wall of the copper tube still retains a small gap, which will affect the quality and use of the copper tube. Moreover, after the welding position is polished, the overall thickness of the welding position will be thinner than that of the copper tube. After long-term use, it is prone to corrosion damage and leakage, and the inner and outer walls of the copper tube cannot be welded and polished simultaneously. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose an automatic welding device for copper tubes of air-conditioning compressors.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An automatic welding device for the copper tube of an air-conditioning compressor comprises a copper tube, a movable column is slidably installed inside the copper tube, a fixed sleeve is slidably installed on the outer wall of the copper tube, an annular arc groove is provided at the middle end of the outer wall of the movable column, a welding mechanism is provided inside the arc groove, both ends of the movable column are provided with a fixed groove, a mounting seat is installed on the inner wall of the fixed groove, an electric rotating shaft is rotatably installed on the end of the mounting seat away from the inner wall of the fixed groove, one end of the electric rotating shaft away from the mounting seat is connected to a connecting line, a first connecting groove is provided on the outer walls of both ends of the movable column, and a grinding mechanism is provided at both ends of the movable column.

[0007] Preferably, the grinding mechanism includes a second fixed ring, one end of the second fixed ring is threadedly installed inside the first connecting groove, an annular first groove is provided on the outer wall of the end of the second fixed ring away from the movable column, an annular first rubber airbag is installed on the inner wall of the first groove, and several first grinding sheets are installed on the outer wall of the first rubber airbag.

[0008] Preferably, the welding mechanism includes two telescopic welding heads, annular slide grooves are provided on the inner walls at both ends of the arc groove, an electric slider is installed for sliding inside the slide groove, the bottom end of the telescopic welding head is installed on the end of the electric slider away from the inner wall of the slide groove, a placement groove is provided on the inner wall of the arc groove, the placement groove is located between the two slide grooves, and a feed hole is provided on the side of the bottom end of the two telescopic welding heads.

[0009] Preferably, a plurality of grooves are provided on the outer walls of both ends of the movable column, an electromagnet sheet is installed on the inner wall of the groove, and a mounting hole is provided on the outer wall of the movable column between two adjacent grooves, a limiting rod is slidably installed inside the mounting hole, and a fixing rod is rotatably installed on one end of the limiting rod located inside the fixed groove.

[0010] Preferably, a fixed plate is installed on the outer wall of the electric rotating shaft, one end of the fixed rod is installed on the side of the fixed plate, a sliding hole is opened on the side of the limiting rod in the length direction, a support rod is slidably installed inside the sliding hole, and both ends of the support rod are respectively installed on the inner walls on both sides of the mounting hole, and the end of the limiting rod away from the fixed plate is in contact with the inner wall of the copper tube.

[0011] Preferably, both ends of the outer wall of the fixing sleeve are provided with an annular second connecting groove, both ends of the fixing sleeve are installed with a first fixing ring, one end of the first fixing ring is threadedly installed inside the second connecting groove, a retaining ring is installed on the inner wall of the first fixing ring, and a second rubber airbag is installed on the inner wall of the first fixing ring.

[0012] Preferably, one end of the second rubber airbag abuts against the side of the retaining ring, a plurality of second grinding sheets are installed on the inner wall of the second rubber airbag, a second slot is opened on the inner wall of both ends of the fixing sleeve, and an electromagnet ring is installed on the inner wall of the second slot.

[0013] Preferably, an annular storage groove is provided on the inner wall of the fixing 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, and the inner wall of the welding piece abuts against the outer wall of the copper tube.

[0014] Preferably, the storage slot is located between the two second card slots, a through hole is opened on the inner top of the storage slot, the through hole is located between the two ends of the heating plate, and an annular anti-slip ring is installed on both ends of the outer wall of the fixing sleeve.

[0015] Preferably, the end of the connecting line away from the movable column passes through the copper tube, and the end of the limiting rod away from the fixed plate is provided with a rubber block.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention can simultaneously weld the connection positions of the inner walls and outer walls of two copper tubes, and the welding methods of the connection positions of the inner walls and outer walls of the two copper tubes adopt two different welding methods, and the inner walls and outer walls of the copper tubes are welded, which can better weld the connection positions of the two copper tubes, make the welding effect of the copper tubes better, and have a better sealing effect when in use. When polishing the welding positions of the inner walls and outer walls of the copper tubes, the polishing of the welding positions of the inner walls of the copper tubes is carried out by using a movable column and a first polishing sheet to move back and forth inside the copper tube for polishing, while the polishing of the welding positions of the outer walls of the copper tubes is carried out by using a fixed sleeve and a second polishing sheet to rotate on the outer wall of the copper tube to polish the welding positions.

[0018] 2. In the present invention, when welding the connection position of the inner walls of two copper tubes, the first grinding sheet is brought into contact with the welding position of the inner wall of the copper tube by the expansion caused by the inflation of the first rubber airbag. By frequently inflating and deflating the first rubber airbag, pulling through the connecting wire, and coordinating with the magnetic field adsorption between the electromagnet ring and the electromagnet sheet, the first grinding sheet is moved back and forth inside the copper tube to achieve grinding of the welding position of the inner wall of the copper tube. The staff can drive the movable column suspended inside the copper tube to rotate the angle by rotating the connecting wire, so that several first grinding sheets can comprehensively grind the welding position of the inner wall of the copper tube.

[0019] 3. In the present invention, the electromagnet pieces on the outer walls at both ends of the movable 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 movable column inside the copper tube through the magnetic field between the electromagnet ring and the electromagnet piece. At the same time, the movable column can be kept suspended inside the copper tube during use. When the position of the movable column is offset, it is convenient to accurately move the position of the movable column through the magnetic field adsorption between the electromagnet ring and the electromagnet piece, so that the central axis of the movable 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 movable column and the inner wall of the copper tube can be kept consistent, and the front and rear positions of the movable column can be limited.

[0020] 4. 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 for grinding are threadedly installed on the fixed sleeve and the movable column respectively. During use, the staff can install and remove 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 fixed sleeve, so that the position where the outer walls of the two copper tubes abut against the fixed 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

[0021] Figure 1This is a three-dimensional diagram of an automatic welding device for copper tubes of air-conditioning compressors proposed by the present invention;

[0022] Figure 2 This is a cross-sectional view of a copper tube of an automatic welding device for an air-conditioning compressor copper tube proposed by the present invention;

[0023] Figure 3 This is a cross-sectional view of a moving column of an automatic welding device for copper tubes of an air-conditioning compressor proposed by the present invention;

[0024] Figure 4 This is a schematic diagram of the installation structure of the second fixing ring of the automatic welding device for the copper tube of an air-conditioning compressor proposed by the present invention;

[0025] Figure 5 This is a schematic diagram of the structure of a movable column of an automatic welding device for copper tubes of an air-conditioning compressor proposed by the present invention;

[0026] Figure 6 This is a schematic diagram of the fixed plate structure of an automatic welding device for copper tubes of an air-conditioning compressor proposed by the present invention;

[0027] Figure 7 This is a schematic diagram of the installation structure of the first fixing ring of the automatic welding device for the copper tube of an air-conditioning compressor proposed by the present invention;

[0028] Figure 8 This is a cross-sectional view of a fixing sleeve of an automatic welding device for copper tubes of an air-conditioning compressor proposed by the present invention.

[0029] In the figure: 1. copper tube; 2. fixing sleeve; 3. first fixing ring; 4. connecting line; 5. through hole; 6. anti-slip ring; 7. moving column; 8. arc groove; 9. placement groove; 10. slide groove; 11. electric slider; 12. telescopic welding head; 13. fixing groove; 14. second fixing ring; 15. first rubber airbag; 16. first grinding disc; 17. mounting seat; 18. electric shaft; 19. mounting hole; 20. limiting rod; 21. sliding hole; 22. groove; 23. electromagnet sheet; 24. support rod; 25. first connecting groove; 26. welding sheet; 27. fixing plate; 28. fixing rod; 29. ​​second rubber airbag; 30. second grinding disc; 31. storage groove; 32. first card slot; 33. heating plate; 34. second card slot; 35. electromagnet ring; 36. second connecting groove; 37. retaining ring. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are 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 direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0032] Reference Figure 1-8 , an automatic welding device for the copper tube of an air-conditioning compressor, comprising a copper tube 1, a moving column 7 is slidably installed inside the copper tube 1, a fixed sleeve 2 is slidably installed on the outer wall of the copper tube 1, an annular arc groove 8 is opened at the middle end of the outer wall of the moving column 7, a welding mechanism is provided inside the arc groove 8, both ends of the moving column 7 are provided with a fixed groove 13, a mounting seat 17 is installed on the inner wall of the fixed groove 13, an electric rotating shaft 18 is rotatably installed on the 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, a first connecting groove 25 is opened on the outer walls of both ends of the moving column 7, and a grinding mechanism is provided at both ends of the moving column 7.

[0033] As a technical optimization solution of the present invention, the grinding mechanism includes a second fixed ring 14, one end of the second fixed ring 14 is threadedly installed inside the first connecting groove 25, and an annular first clamping groove 32 is opened on the outer wall of the end of the second fixed ring 14 away from the movable column 7, and an annular first rubber airbag 15 is installed on the inner wall of the first clamping groove 32, and a plurality of first grinding discs 16 are installed on the outer wall of the first rubber airbag 15; when the inner wall gap position of the copper tube 1 is welded, the staff can move the movable column 7 and expand the first rubber airbag 15 to push the first grinding disc 16 on its outer wall to abut against the welding position of the inner wall of the copper tube 1. Through the reciprocating movement of the movable column 7, the first grinding disc 16 grinds the welding position, and the staff can adjust the angle of the first grinding disc 16 through the magnetic field adsorption between the fixed sleeve 2 and the movable column 7.

[0034] As a technical optimization scheme of the present invention, the welding mechanism includes two telescopic welding heads 12, and an annular slide groove 10 is opened on the inner walls of both ends of the arc groove 8. An electric slider 11 is installed inside the slide groove 10 for sliding. The bottom end of the telescopic welding head 12 is installed on the end of the electric slider 11 away from the inner wall of the slide groove 10. A placement groove 9 is opened on the inner wall of the arc groove 8. The placement groove 9 is located between the two slide grooves 10, and a feed hole is opened on the bottom side 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 to the telescopic welding head 12, so that the telescopic welding head 12 can weld the gap on the inner wall of the copper tube 1.

[0035] As a technical optimization solution of the present invention, several grooves 22 are provided on the outer walls of both ends of the movable column 7, and an electromagnet sheet 23 is installed on the inner wall of the groove 22. A mounting hole 19 is provided on the outer wall of the movable column 7 between two adjacent grooves 22. A limiting rod 20 is slidably installed inside the mounting hole 19, and a fixing rod 28 is rotatably installed on one end of the limiting rod 20 located inside the fixed groove 13; the electric rotating shaft 18 can adjust the position and angle of several limiting rods 20 through the fixed disk 27, which is convenient for storing the limiting rods 20, and at the same time, several limiting rods 20 can cooperate with each other to fix the position of the movable column 7 inside the copper tube 1.

[0036] 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 fixed rod 28 is installed on the side of the fixed disk 27, a sliding hole 21 is opened on the side of the limiting rod 20 in the length direction, and a support rod 24 is slidably installed inside the sliding hole 21. The two ends of the support rod 24 are respectively installed on the inner walls on both sides of the mounting hole 19, and the end of the limiting rod 20 away from the fixed disk 27 is in contact with the inner wall of the copper tube 1; when in use, the support rod 24 can play a better position limiting and supporting role for the position of the limiting rod 20.

[0037] As a technical optimization solution of the present invention, both ends of the outer wall of the fixing sleeve 2 are provided with an annular second connecting groove 36, and both ends of the fixing sleeve 2 are installed 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; 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.

[0038] As a technical optimization solution of the present invention, one end of the second rubber airbag 29 abuts against the side of the retaining ring 37, and a plurality of second grinding discs 30 are installed on the inner wall of the second rubber airbag 29. Second card grooves 34 are opened on the inner walls of both ends of the fixed sleeve 2, and an electromagnet ring 35 is installed on the inner wall of the second card groove 34; the second rubber airbag 29 can be expanded to make the second grinding disc 30 abut against the welding position of the outer wall of the copper tube 1, and the second grinding disc 30 can be used to grind the welding position by rotating the fixed sleeve 2.

[0039] As a technical optimization solution of the present invention, an annular storage groove 31 is opened on the inner wall of the fixing sleeve 2, and 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, and the inner wall of the welding piece 26 abuts against the outer wall of the copper tube 1; the welding piece 26 is a brazing welding piece, and the melting point of the welding piece 26 is lower than that of the copper tube 1. When in use, the outer wall welding method of the copper tube 1 is different from the inner wall welding method, and the inner wall and outer wall positions of the copper tube 1 can be welded respectively by the two welding methods.

[0040] As a technical optimization solution of the present invention, the storage slot 31 is located between the two second card slots 34, and a through hole 5 is opened at the inner top of the storage slot 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 fixed sleeve 2; when in use, the staff can check the position of the fixed sleeve 2 and its internal welding piece 26 through the through hole 5 when moving the fixed sleeve 2.

[0041] As a technical optimization solution of the present invention, 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; when in use, the rubber block can activate a better protective effect on the inner wall of the copper tube 1 when the limiting rod 20 is abutted and fixed with the inner wall of the copper tube 1, preventing the limiting rod 20 from clamping the inner wall of the copper tube 1 with a large force, causing dents on the inner wall of the copper tube 1 due to extrusion.

[0042] When using the present invention, a worker first threadably installs two first fixing rings 3 on both ends of the fixing sleeve 2 and inserts one of the copper tubes 1 to be connected into one end of the fixing sleeve 2. The worker can then determine the position of one end of the copper tube 1 within the fixing sleeve 2 through the through-hole 5 on the outer wall of the fixing sleeve 2 and adjust the position of the fixing sleeve 2 at any time based on the position of the copper tube 1 within the fixing sleeve 2, so that the end of the copper tube 1 closest to the inside of the fixing sleeve 2 is directly below the through-hole 5. The worker then inflates the interior of the second rubber bladder 29 on the inner wall of the first fixing ring 3 near the copper tube 1, causing the second rubber bladder 29 to expand and push the second polishing pads 30 on its inner wall, causing several of the second polishing pads 30 to abut against the inner wall of the copper tube 1. This secures the fixing sleeve 2, first fixing ring 3, and copper tube 1 in place during use.

[0043] The staff wraps and installs the welding sheet 26 to be brazed around the outer wall of one end of the copper tube 1 located inside the fixing sleeve 2, and inserts the other copper tube 1 to be welded into the fixing sleeve 2, so that the ends of the two copper tubes 1 located inside the fixing sleeve 2 abut against each other. At the same time, the inner walls of the welding sheet 26 are respectively located on the outer walls of the two copper tubes 1. The staff also adjusts the second rubber airbag 29 on the inner wall of the other first fixing ring 3 so that the second grinding sheet 30 on the inner wall abuts 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 position where the outer walls of the two copper tubes 1 abut against the fixing sleeve 2 and the inner walls of the first fixing ring 3 larger, and the welding position of the two copper tubes 1 is more stable during welding.

[0044] During use, the electromagnet rings 35 located on the inner walls of the two ends of the fixed sleeve 2 are energized with an external power source, generating a magnetic field. The operator then threadedly mounts the two second fixed rings 14 on the two ends of the movable column 7, connects the external connecting wire 4 to one of the electric shafts 18, and inserts the end of the movable column 7 away from the connecting wire 4 into the copper tube 1. The movable column 7 is then slid within the copper tube 1 toward the fixed sleeve 2 until the movable column 7 is located within the fixed sleeve 2 and the middle of the outer wall of the movable column 7 is located between the two welded positions of the copper tubes 1. The electromagnet pieces 23 located on the outer walls at both ends of the movable column 7 correspond to the electromagnet rings 35 on the inner walls at both ends of the fixed sleeve 2 through the magnetic field. When in use, the electromagnet rings 35 can limit the position of the movable column 7 inside the copper tube 1 through the magnetic field between the electromagnet pieces 23. At the same time, when in use, the movable column 7 can be kept suspended inside the copper tube 1, so that the central axis of the movable column 7 is consistent with the central axis of the copper tube 1. When in use, the distance between different positions of the outer wall of the movable column 7 and the inner wall of the copper tube 1 can be kept consistent, and the front and rear positions of the movable column 7 can be limited.

[0045] The electric rotating shaft 18 drives the fixed disk 27 on its outer wall to rotate. When the fixed disk 27 rotates, the fixed rod 28 on its side can push the limiting rod 20 close to one end of the fixed disk 27, 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 toward 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. When in use, several limit rods 20 located at both ends of the moving column 7 are in contact with the inner wall of the copper tube 1. When in use, several limit rods 20 can limit and support the two ends of the moving column 7 respectively 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 ring 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 a variety of ways at the same time, and 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, 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 sheet 23 can adsorb the fixed sleeve 2 and move it to the specified position accurately.

[0046] When in use, a welding wire is wound and installed inside the placement groove 9 on the movable column 7, and one end of the welding wire is connected to the telescopic welding head 12. When it is necessary to weld the position to be welded on the inner wall of the copper tube 1, the top of the telescopic welding head 12 is moved toward the inner wall of the copper tube 1 until one end of the welding wire contacts the position to be welded on the inner wall of the copper tube 1 through the telescopic welding head 12. The telescopic welding head 12 heats the position where the welding wire contacts the gap to be welded on the copper tube 1, thereby welding the gap of the copper tube 1. The electric slider 11 drives the telescopic welding head 12 to rotate at both ends of the inner wall of the arc groove 8. When the telescopic welding head 12 moves, the welding wire can be gradually pulled so that the welding wire gradually passes through the telescopic welding head 12 to weld the gap between the two copper tubes 1. When the telescopic welding head 12 welds the gap on the inner wall of the copper tube 1, the heating plate 33 on the inner wall of the fixed sleeve 2 heats the welding piece 26 on the gap on the outer walls of the two copper tubes 1, so that the welding piece 26 melts and the connection position of the outer walls of the two copper tubes 1 is welded. At the same time, the staff can adjust the size of the gap between the two copper tubes 1 so that part of the welding piece 26 will flow into the inside of the gap between the two copper tubes 1 when it melts. When the welding piece 26 melts and solidifies again, the connection position of the outer walls of the two copper tubes 1 can be welded. The welding method for the inner wall gap of the copper tube 1 is arc welding. During arc welding, the welding wire is both a filler metal and a conductive electrode. The telescopic welding head 12 is powered by the connecting line 4. The telescopic welding head 12 transports one end of the welding wire to the inner wall gap position of the copper tube 1. At a specified voltage, a discharge phenomenon occurs between the welding wire and the copper tube 1 to form an arc. The arc heats and melts the welding wire near the inner wall gap position of the copper tube 1, and the melted welding wire adheres to the inner wall gap surface and the inside of the gap of the copper tube 1 to achieve a welding effect.

[0047] After the welding of the inner and outer connection positions of the two copper tubes 1 is completed, the staff can retract the limit rod 20 into the interior of the fixing groove 13 through the electric rotating shaft 18 and the fixing plate 27, and at the same time inflate the interior of the two first rubber airbags 15 to expand the first rubber airbags 15 and push the first grinding piece 16 on its outer wall to abut against the inner wall of the copper tube 1. The staff drives the movable column 7 and the second fixing ring 14 to move inside the copper tube 1 by pulling the connecting line 4, and several first grinding pieces 16 can grind the welding position on the inner wall of the copper tube 1 when moving. When the first grinding piece 16 moves to one side of the welding position, the gas inside the first rubber airbag 15 is released. The first grinding disc 16 is moved toward the direction of the second fixed ring 14, and the fixed sleeve 2 moves the movable column 7 toward the welding position through the magnetic field adsorption of the electromagnet sheet 23 and the electromagnet ring 35 thereon, until the first grinding disc 16 moves to the other side of the welding position, and then the first rubber airbag 15 is inflated again, and the movable column 7 and the first grinding disc 16 are pulled to move through the connecting line 4, so that the first grinding disc 16 reciprocates to grind the welding position of the inner wall of the copper tube 1, and the staff can rotate the movable column 7 suspended inside the copper tube 1 by rotating the connecting line 4, so that several first grinding discs 16 can comprehensively grind the welding position of the inner wall of the copper tube 1.

[0048] After the staff has finished grinding the inner wall welding position of the copper tube 1, they can pull the connecting line 4 to move the movable column 7 out of the copper tube 1 and move the fixed sleeve 2 so that the outer wall welding position of the copper tube 1 is located inside one of the second rubber airbags 29. The two second rubber airbags 29 are inflated so that the multiple second grinding discs 30 on the inner wall of the second rubber airbag 29 abut against the outer wall welding position of the copper tube 1. The staff can then drive the fixed sleeve 2 to rotate via the anti-slip ring 6. When the fixed sleeve 2 rotates, the second grinding discs 30 can be driven to grind the outer wall welding position of the copper tube 1 via the first fixed ring 3 and the second rubber airbag 29. The outer wall of the anti-slip ring 6 is provided with multiple teeth and grooves. The staff can drive the anti-slip ring 6 and the fixed sleeve 2 to rotate via an external transmission mechanism, and drive the second grinding discs 30 to grind the outer wall welding position of the copper tube 1. During use, two different welding methods are used for the welding of the connection positions of the inner walls and outer walls of the two copper tubes 1, and both the inner walls and outer walls of the copper tube 1 are welded, which can better weld the connection positions of the two copper tubes 1, make the welding effect of the copper tube 1 better, and have a better sealing effect during use. When polishing the welding positions of the inner and outer walls of the copper tube 1, the polishing of the welding positions of the inner walls of the copper tube 1 is performed by reciprocating movement of the movable column 7 and the first polishing plate 16 inside the copper tube 1, and the polishing of the welding positions of the outer walls of the copper tube 1 is performed by rotating the fixed sleeve 2 and the second polishing plate 30 on the outer wall of the copper tube 1 to polish the welding positions.

[0049] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An automatic welding device for copper tubes of air-conditioning 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 movable column (7), 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 installed on the inner wall of the fixed groove (13), an electric rotating shaft (18) is rotatably mounted on the 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), a first connecting groove (25) is provided on the outer walls of both ends of the movable column (7), and a grinding mechanism is provided at both ends of the movable column (7); 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); 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 installed on the inner wall of the groove (22). A mounting hole (19) is provided on the outer wall of the movable column (7) between two adjacent grooves (22), and a limiting rod (20) is slidably installed inside the mounting hole (19). A fixing rod (28) is rotatably installed on one end of the limiting rod (20) located inside the fixing groove (13); A fixed disk (27) is mounted on the outer wall of the electric rotating shaft (18), one end of the fixed rod (28) is mounted on the side of the fixed disk (27), a sliding hole (21) is opened on the side of the limiting rod (20) along the length direction, a support rod (24) is slidably mounted inside the sliding hole (21), and both ends of the support rod (24) are respectively mounted on the inner walls of both sides of the mounting hole (19), and the end of the limiting rod (20) away from the fixed disk (27) is in contact with the inner wall of the copper tube (1); 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); 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 installed on the inner wall of the second rubber airbag (29), and a second slot (34) is provided on the inner wall of both ends of the fixing sleeve (2), and an electromagnet ring (35) is installed on the inner wall of the second slot (34); 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 piece (26) is installed inside the storage groove (31), and the inner wall of the welding piece (26) abuts against the outer wall of the copper tube (1).

2. The automatic welding device for copper tubes of air conditioner compressors according to claim 1, characterized in that: The welding mechanism comprises two telescopic welding heads (12), annular chute (10) is provided on the inner walls at both ends of the arc groove (8), an electric slider (11) is slidably installed inside the chute (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 chute (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 chute (10), and a feed hole is provided on the side surface of the bottom end of the two telescopic welding heads (12).

3. The automatic welding device for copper tubes of air conditioner compressors according to claim 1, characterized in that: The storage slot (31) is located between the two second card slots (34), a through hole (5) is provided at the inner top of the storage slot (31), and 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).

4. The automatic welding device for copper tubes of air conditioner compressors according to claim 1, 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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