Automobile air conditioner pipeline coaxial pipe section welding device

Abstract

The application relates to a coaxial pipe section welding device for an automobile air conditioner pipeline, which comprises a workbench, a clamping assembly, a rotating assembly and a welding assembly, wherein the rotating assembly comprises a driving member and a fixing member. In the application, the driving member and the fixing member are arranged to realize automatic welding of the coaxial pipe, and a worker does not need to hold the welding assembly to continuously adjust the posture for welding the circumferential outer wall of the coaxial pipe end, so that the processing efficiency of the coaxial pipe is improved, and the production cost of the coaxial pipe is reduced; the fixing rod and the inflation sleeve are arranged; the pressure of the low-pressure inner pipe on the inflation sleeve drives the inflation sleeve to deform, so that the inner wall of the low-pressure inner pipe and the outer wall of the inflation sleeve are not easy to wear, thereby improving the production quality of the coaxial pipe; the air guide flow channel is arranged to realize cooling of the low-pressure inner pipe, so that the coaxial pipe is not easy to deform when being processed for a long time in a high-temperature state, thereby improving the processing quality of the coaxial pipe.

Description

TECHNICAL FIELD

[0001] The application relates to the field of automobile air conditioner pipeline technology, in particular to a coaxial pipe section welding device for automobile air conditioner pipeline. BACKGROUND

[0002] In the automobile air conditioner industry, the coaxial pipe of the automobile air conditioner is also called an intermediate heat exchanger, and heat exchange is realized by respectively introducing a cold source and a heat source into the inner pipe and the outer pipe of the coaxial pipe.

[0003] The coaxial pipe comprises a low-pressure inner pipe and a high-pressure outer sleeve pipe coaxially arranged, the flow directions of the low-pressure gas in the low-pressure inner pipe and the high-temperature and high-pressure liquid in the high-pressure outer sleeve pipe are opposite, so that a pipe system for self heat exchange of high and low pressure pipes is formed.

[0004] When the coaxial pipe is processed, the worker sets the high-pressure outer sleeve pipe on the outer wall of the low-pressure inner pipe to realize coaxial connection of the high-pressure outer sleeve pipe and the low-pressure inner pipe; the worker places the coaxial pipe on the limiting device to realize limiting of the coaxial pipe, and the worker flame brazes the two ends of the coaxial pipe in the axial direction to fix the two ends of the low-pressure inner pipe on the inner wall of the high-pressure outer sleeve pipe, thereby realizing processing of the coaxial pipe. Since the coaxial pipe is limited on the limiting device, the worker needs to constantly adjust the posture to flame braze the circumferential outer wall of the two ends of the coaxial pipe, thereby reducing the work efficiency of the worker and increasing the production cost of the coaxial pipe. SUMMARY

[0005] In order to improve the problem of the production cost of the coaxial pipe, the application provides a coaxial pipe section welding device for automobile air conditioner pipeline.

[0006] The coaxial pipe section welding device for automobile air conditioner pipeline provided by the application adopts the following technical scheme:

[0007] The coaxial pipe section welding device for automobile air conditioner pipeline comprises a workbench, a clamping assembly, a rotating assembly and a welding assembly, the clamping assembly, the rotating assembly and the welding assembly are all connected to the end face of the workbench, the clamping assembly is used for clamping the coaxial pipe and limiting the coaxial pipe on the end face of the workbench, the welding assembly is used for welding the end of the coaxial pipe limited on the workbench, the rotating assembly comprises a driving member and a fixing member, the fixing member is connected to the driving member, the fixing member is used for abutting against the inner wall of the low-pressure inner pipe to form fixation, the driving member drives the fixing member to rotate and drives the coaxial pipe to rotate, and the welding assembly welds and fixes the end of the coaxial pipe.

[0008] By adopting the technical scheme, when the coaxial pipe is machined, the worker places the coaxial pipe on the clamping assembly, the clamping assembly limits the coaxial pipe on the end face of the workbench, and the fixing member abuts against the inner wall of the low-pressure inner pipe to form fixation, the rotation axis of the fixing member coincides with the axis of the coaxial pipe, the driving member drives the fixing member to rotate and drives the coaxial pipe to rotate, and the welding assembly is welded to the circumferential outer wall of the end portion of the coaxial pipe, so that the automatic welding of the coaxial pipe is realized, the worker does not need to hold the welding assembly to continuously adjust the posture to weld the circumferential outer wall of the end portion of the coaxial pipe, and therefore the machining efficiency of the coaxial pipe is improved and the production cost of the coaxial pipe is reduced.

[0009] Optionally, the fixing member comprises a fixing rod and an inflation sleeve, the inflation sleeve is sleeved on the outer wall of the fixing rod, the circumferential outer wall of the inflation sleeve is used for abutting against the circumferential inner wall of the low-pressure inner pipe to form fixation, and the fixing rod is fixed on the driving member.

[0010] By adopting the technical scheme, when the coaxial pipe is machined, the worker places the coaxial pipe on the clamping assembly, the clamping assembly limits the coaxial pipe on the end face of the workbench, and the fixing member abuts against the inner wall of the low-pressure inner pipe to form fixation, the rotation axis of the fixing member coincides with the axis of the coaxial pipe, the driving member drives the fixing member to rotate and drives the coaxial pipe to rotate, and the welding assembly is welded to the circumferential outer wall of the end portion of the coaxial pipe, so that the automatic welding of the coaxial pipe is realized, the worker does not need to hold the welding assembly to continuously adjust the posture to weld the circumferential outer wall of the end portion of the coaxial pipe, and therefore the machining efficiency of the coaxial pipe is improved and the production cost of the coaxial pipe is reduced.

[0011] Optionally, the workbench is connected with a gas supply assembly, the gas supply assembly comprises a gas supply pump, a gas supply pipeline and a gas supply plate, the gas supply plate is provided with a gas supply hole for the fixing rod to pass through, a gas supply ring channel is formed in the inner wall of the gas supply hole in the circumferential direction, and the gas supply pipeline is in communication with the gas outlet end of the gas supply pump and the inner cavity of the gas supply ring channel at both ends in a one-to-one correspondence.

[0012] By adopting the technical scheme, when the clamping assembly clamps the coaxial pipe and is positioned at the end face of the workbench, one end of the fixed rod is provided with the gas supply hole and located in the inner cavity of the low-pressure inner tube, the two ends of the gas inlet pipeline are in one-to-one correspondence with the inner cavity of the inflation sleeve and the inner cavity of the gas supply ring, the gas in the gas supply pump passes through the gas supply pipeline, the gas supply ring, the gas inlet pipeline and enters the inner cavity of the inflation sleeve in sequence, the gas pressure in the inner cavity of the inflation sleeve increases, and the circumferential outer wall of the inflation sleeve is driven to abut against the inner wall of the low-pressure inner tube, thereby further improving the abutting force between the fixing member and the coaxial pipe, and the stability of the driving member driving the coaxial pipe to rotate is improved.

[0013] Optionally, the clamping assembly comprises a clamping seat, a limiting plate and a limiting member, the bottom wall of the clamping seat is connected to the end face of the workbench, the limiting member is connected to the end face of the clamping seat, the limiting plate is connected to the moving end of the limiting member, the limiting member drives the limiting plate to move towards the clamping seat, the end face of the limiting plate towards the clamping seat is provided with a fixed arc groove one, and the end face of the clamping seat towards the limiting plate is provided with a fixed arc groove two, when the limiting member drives the limiting plate to slide towards the clamping seat, the fixed arc groove one and the fixed arc groove two are spliced to form a fixed ring groove, the fixed ring groove is used for accommodating the end portion of the coaxial pipe, and the axis of the fixed ring groove coincides with the rotation axis of the fixing member, when the end portion of the coaxial pipe is embedded in the fixed arc groove one, the limiting member drives the limiting plate to slide towards the clamping seat, the fixed arc groove one and the fixed arc groove two are spliced to form a fixed ring groove, and the circumferential inner wall of the fixed ring groove abuts against the circumferential outer wall of the coaxial pipe to form limiting.

[0014] By adopting the technical scheme, the staff embeds the end portion of the coaxial pipe into the fixed arc groove one, the limiting member drives the limiting plate to slide towards the clamping seat, the fixed arc groove one and the fixed arc groove two are spliced to form a fixed ring groove, the inner wall of the fixed ring groove abuts against the circumferential outer wall of the coaxial pipe to form limiting, and the rotation axis of the fixing member coincides with the axis of the coaxial pipe, so that the coaxial pipe is not easy to deviate on the end face of the workbench, thereby improving the machining precision of the welding assembly on the coaxial pipe.

[0015] Optionally, the inner walls of the fixed arc groove one and the fixed arc groove two are provided with elastic portions, and the end faces of the elastic portions are used for abutting against the outer wall of the coaxial pipe.

[0016] By adopting the technical scheme, when the end portion of the coaxial pipe is located in the inner wall of the fixed arc groove one, the limiting member drives the limiting plate to slide towards the clamping seat, the fixed arc groove one and the fixed arc groove two are spliced to form a fixed ring groove, and the end face of the elastic portion abuts against the circumferential outer wall of the end portion of the coaxial pipe to form limiting, the pressure of the coaxial pipe on the elastic portion drives the elastic portion to deform, so that the outer wall of the coaxial pipe abutting against the elastic portion is not easy to be abraded, thereby improving the machining quality of the coaxial pipe.

[0017] Optionally, the end of the fixed rod away from the driving member is connected with a wind guide block, a plurality of wind guide flow channels are formed in the circumferential outer wall of the wind guide block, the plurality of wind guide flow channels are communicated with the air inlet pipe, and an opening and closing member is connected to the fixed rod.

[0018] By using the above technical scheme, when the driving member drives the fixed rod to rotate, the inflation sleeve abuts against the inner wall of the low-pressure inner pipe and drives the coaxial pipe to rotate, the fixed rod converts part of kinetic energy into internal energy, the temperature of the fixed rod is increased, the opening and closing member separates the inflation sleeve inner cavity and the air inlet pipe, and the wind guide flow channel and the air inlet pipe are communicated at the same time, the gas in the gas supply pump is discharged from the wind guide flow channel in sequence through the gas supply pipe, the gas supply ring channel and the air inlet pipe, the gas supplies air to the low-pressure inner pipe inner cavity, the low-pressure inner pipe transfers most of the internal energy to the air, the temperature of the low-pressure inner pipe is reduced, the coaxial pipe is not easy to deform for a long time under high temperature, and thus the processing quality of the coaxial pipe is improved.

[0019] Optionally, a plurality of fans are connected to the circumferential outer wall of the wind guide block, the fans correspond to the wind guide flow channels one by one, and one of the fan blades of the fan faces the wind guide flow channel notch.

[0020] By using the above technical scheme, when the fixed rod is heated, the opening and closing member separates the inflation sleeve inner cavity and the air inlet pipe, and the wind guide flow channel and the air inlet pipe are opened at the same time, the gas in the gas supply pump is discharged from the wind guide flow channel in sequence through the gas supply pipe, the gas supply ring channel and the air inlet pipe, the gas in the wind guide flow channel drives the fan to rotate, the gas flow in the low-pressure inner pipe inner cavity is increased, the heat exchange efficiency between the low-pressure inner pipe and the air is improved, and the processing quality of the coaxial pipe is further improved.

[0021] Optionally, a polishing assembly is connected to the workbench, and the polishing assembly is used for polishing the end of the coaxial pipe after welding.

[0022] By using the above technical scheme, when the welding assembly completes welding on the end of the coaxial pipe at the connection between the high-pressure outer sleeve pipe and the low-pressure inner pipe, the polishing assembly polishes the end of the coaxial pipe after welding, so that burrs are not easy to occur at the end of the coaxial pipe, and thus the processing quality of the coaxial pipe is improved.

[0023] Optionally, the workbench comprises a base and a rotating disc, the rotating disc is rotationally connected to the base, the clamping assembly is connected to the rotating disc, the welding assembly and the polishing assembly are connected to the base, and the welding end of the welding assembly and the polishing end of the polishing assembly both face the clamping assembly, when the welding assembly completes welding on the end of the coaxial pipe limited on the clamping assembly, the rotating disc rotates and drives the end of the coaxial pipe after welding on the clamping assembly to face the polishing assembly.

[0024] By adopting the technical scheme, the worker drives the clamping assembly to clamp the coaxial pipe on the rotating disc, the coaxial pipe end is towards the welding end of the welding assembly, the rotating assembly drives the coaxial pipe to rotate, the welding end of the welding assembly is welded and fixed to the coaxial pipe end circumferential outer wall, when the coaxial pipe end is welded, the rotating disc rotates and drives the coaxial pipe end to be towards the polishing assembly, the worker does not need to re-fix the coaxial pipe, the processing efficiency of the coaxial pipe is further improved, and the processing cost of the coaxial pipe is reduced.

[0025] Optionally, the workbench further comprises a rotating member, the rotating member drives the rotating disc to rotate.

[0026] By adopting the technical scheme, the rotating member drives the rotating disc to rotate, the worker does not need to manually drive the rotating disc to rotate, the automation of the coaxial pipe processing is further improved, the work burden of the worker is reduced, and the processing cost of the coaxial pipe is reduced.

[0027] In summary, the present application has at least one of the following beneficial technical effects:

[0028] 1. The driving member and the fixing member are arranged, the automatic welding of the coaxial pipe is realized, the worker does not need to hold the welding assembly to continuously adjust the posture to weld and fix the coaxial pipe end circumferential outer wall, the processing efficiency of the coaxial pipe is improved, and the production cost of the coaxial pipe is reduced;

[0029] 2. The fixing rod and the expansion sleeve are arranged; the pressure of the low-pressure inner pipe on the expansion sleeve drives the expansion sleeve to deform, the low-pressure inner pipe inner wall and the expansion sleeve outer wall are not easy to wear, and the production quality of the coaxial pipe is improved;

[0030] 3. The air guide flow channel is arranged, the low-pressure inner pipe is cooled, the coaxial pipe is not easy to deform under the condition of being processed for a long time in a high-temperature state, and the processing quality of the coaxial pipe is improved. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is a whole structure schematic view of the embodiment of the present application.

[0032] Figure 2 It is a whole structure schematic view of the rotating assembly in the embodiment of the present application.

[0033] Figure 3 It is a partial structure schematic view of the embodiment of the present application, mainly showing the gas supply assembly.

[0034] Figure 4 It is a partial sectional view of the embodiment of the present application, mainly showing the air inlet pipeline.

[0035] Explanation of reference numerals in the attached drawings: 1. Workbench; 11. Base; 12. Rotary disk; 13. Rotating component; 2. Rotating assembly; 21. Fixed seat; 22. Driving component; 23. Fixed component; 231. Fixed rod; 2311. Air intake pipe; 2312. Air intake section one; 2313. Air intake section two; 2314. Air intake section three; 2315. Opening and closing groove; 2316. Sliding groove; 232. Inflation sleeve; 3. Clamping assembly; 31. Clamping seat; 311. Fixed arc groove two; 312. Elastic part; 32. Limiting plate; 321. Fixed arc groove one; 33. Limiting component ; 4. Welding assembly; 41. Welding cylinder; 42. Welding plate; 43. Flame welding torch; 5. Grinding assembly; 51. Grinding cylinder; 52. Grinding plate; 53. Grinding motor; 54. Grinding head; 6. Coaxial tube; 7. Elastic component; 8. Air supply assembly; 81. Air supply pump; 82. Air supply pipe; 83. Air supply plate; 831. Air supply hole; 832. Air supply loop; 9. Air guide block; 91. Air guide channel; 10. Fan; 14. Opening and closing components; 141. Thermal expansion and contraction block one; 142. Thermal expansion and contraction block two; 143. Opening and closing block; 1431. Opening and closing hole. Detailed Implementation

[0036] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail.

[0037] This application discloses a welding device for coaxial pipe sections in automotive air conditioning systems. (Refer to...) Figure 1 and Figure 2 A coaxial pipe section welding device for automotive air conditioning pipes includes a worktable 1, a rotating assembly 2, a clamping assembly 3, a welding assembly 4, and a grinding assembly 5. The rotating assembly 2, clamping assembly 3, welding assembly 4, and grinding assembly 5 are all connected to the end face of the worktable 1. The worktable 1 supports the ground; the clamping assembly 3 clamps the end of the coaxial pipe 6 and confines it to the end face of the worktable 1; the rotating assembly 2 drives the coaxial pipe 6 to rotate along its own axis; the welding assembly 4 welds the circumferential outer wall of the end of the coaxial pipe 6; and the grinding assembly 5 grinds the welded end of the coaxial pipe 6.

[0038] Reference Figure 1 The workbench 1 includes a base 11, a rotating disk 12, and a rotating component 13. The rotating disk 12 is rotatably connected to the end face of the base 11. The rotating component 13 is a motor, which is fixed to the bottom wall of the base 11 by screws. The motor shaft is coaxially fixed to the end face of the rotating disk 12. The rotating component 13 drives the rotating disk 12 to rotate.

[0039] Reference Figure 1 There are two welding components 4 and two grinding components 5. The welding components 4 and the grinding components 5 are evenly connected to the end face of the base 11 around the rotation axis of the rotating disk 12, and the welding end of the welding component 4 and the grinding end of the grinding component 5 are both facing the rotation axis of the rotating disk 12.

[0040] With reference to Figure 1 and Figure 2 , two clamping assemblies 3 are arranged on the end face of the rotating disc 12, and the rotating assembly 2 is arranged on the end face of the rotating disc 12 and located on the side of one of the clamping assemblies 3 away from the other clamping assembly 3.

[0041] With reference to Figure 1 and Figure 2 , the two clamping assemblies 3 clamp the two ends of the coaxial pipe 6 in the axial direction one by one and are limited on the end face of the rotating disc 12, the rotating assembly 2 drives the coaxial pipe 6 to rotate along the axis thereof, and the two welding assemblies 4 clamp the two ends of the coaxial pipe 6 one by one and weld and fix the end portions of the coaxial pipe 6; the driving member 22 drives the rotating disc 12 to rotate and drives the two ends of the coaxial pipe 6 welded to correspond to the two polishing assemblies 5, and the polishing assemblies 5 polish the end portions of the coaxial pipe 6 welded, so that the automatic processing of the coaxial pipe 6 is realized, the processing efficiency of the coaxial pipe 6 is improved, and the production cost of the coaxial pipe 6 is reduced.

[0042] With reference to Figure 3 , the clamping assembly 3 comprises a clamping seat 31, a limiting plate 32 and a limiting member 33, the clamping seat 31 is connected to the end face of the rotating disc 12, the limiting member 33 is a push-pull type quick clamp, the limiting member 33 is fixed to the end face of the clamping seat 31 by screws, the limiting plate 32 is fixed to the moving end of the limiting member 33 by screws, and the limiting member 33 drives the limiting plate 32 to slide towards the clamping seat 31.

[0043] With reference to Figure 3 , the end face of the limiting plate 32 towards the clamping seat 31 is provided with a fixed arc groove one 321, and the end face of the clamping seat 31 towards the limiting plate 32 is provided with a fixed arc groove two 311, when the limiting member 33 drives the limiting plate 32 to slide towards the clamping seat 31, the end face of the limiting plate 32 abuts against the end face of the clamping seat 31 to form a fixed state, the fixed arc groove one 321 and the fixed arc groove two 311 are spliced to form a fixed ring groove, and the fixed ring groove is used for accommodating the end portion of the coaxial pipe 6.

[0044] With reference to Figure 4 , the inner walls of the fixed arc groove one 321 and the fixed arc groove two 311 are both provided with elastic portions 312, the end faces of the elastic portions 312 are used for abutting against the outer wall of the end portion of the coaxial pipe 6, the material of the elastic portions 312 can be rubber or silica gel, the material of the elastic portions 312 in the embodiment of the application is rubber, and the elastic portions 312 have a certain deformation capacity.

[0045] With reference to Figure 3 and Figure 4When the coaxial pipe 6 is embedded into the two fixed arc grooves 321 one by one, the limiting part 33 drives the limiting plate 32 to slide towards the direction of approaching the clamping seat 31, the end surface of the limiting plate 32 abuts against the end surface of the clamping seat 31, the fixed arc groove 321 and the fixed arc groove 311 are spliced to form a fixed ring groove, the axis of the fixed ring groove coincides with the axis of the coaxial pipe 6, and the end surface of the elastic part 312 abuts against the circumferential outer wall of the end of the coaxial pipe 6 to form a limiting part, so that the coaxial pipe 6 is not easy to deviate on the rotating disc 12, thereby improving the machining precision of the welding of the coaxial pipe 6; at the same time, the pressure of the end of the coaxial pipe 6 on the elastic part 312 drives the elastic part 312 to deform, so that the pressure on the circumferential outer wall of the end of the coaxial pipe 6 is reduced, the end of the coaxial pipe 6 is not easy to deform during the welding machining, and thus the machining quality of the coaxial pipe 6 is improved.

[0046] Referring to Figure 1 and Figure 2 , the clamping seat 31 close to the rotating assembly 2 is welded and fixed on the end surface of the rotating disc 12, and the other clamping seat 31 is slidingly connected to the rotating disc 12, and the sliding direction of the clamping seat 31 is approaching or away from the rotating assembly 2. The clamping seat 31 is connected with the elastic part 7 between the rotating disc 12 and the clamping seat 31 away from the rotating assembly 2, and the elastic part 7 can be a torsion spring or a compression spring, and in the embodiment of the application, the elastic part 7 is a compression spring and has a certain deformation capacity. The two ends of the elastic part 7 in the elastic force direction are welded and fixed to the end surfaces of the clamping seat 31 and the rotating disc 12 one by one, and the elastic part 7 has a tendency to drive the clamping seat 31 to slide towards the direction of approaching the other clamping seat 31.

[0047] Referring to Figure 1 and Figure 2 , when the length of the coaxial pipe 6 changes, one end of the coaxial pipe 6 is limited on the clamping assembly 3 close to the rotating assembly 2, and the other clamping assembly 3 is driven to slide away from the rotating assembly 2, the clamping end of the clamping assembly 3 is directed to the other end of the coaxial pipe 6, and the other end of the coaxial pipe 6 is limited on the other clamping assembly 3, so that the automobile air conditioner pipe coaxial pipe welding device can realize the welding machining of coaxial pipes 6 of different sizes, and further reduce the machining cost of the coaxial pipe 6.

[0048] Referring to Figure 1 and Figure 2 , the rotating assembly 2 includes a fixed seat 21, a driving part 22 and a fixed part 23, the bottom wall of the fixed seat 21 is welded and fixed on the rotating disc 12, and the fixed seat 21 is located on the side of the clamping seat 31 fixed on the rotating disc 12 away from the other clamping seat 31. The driving part 22 is a motor, the driving part 22 is fixed on the end surface of the fixed seat 21 through a screw, the rotating shaft of the driving part 22 is directed to the clamping seat 31, and the rotating shaft axis of the driving part 22 coincides with the center line of the fixed arc groove 311.

[0049] Referring to Figure 2 and Figure 3The fixing member 23 comprises a fixing rod 231 and an inflation sleeve 232. In the embodiment, the inflation sleeve 232 is made of natural latex and has a certain deformation capacity. One end of the fixing rod 231 is coaxially welded to the end of the rotating shaft of the driving member 22, and the other end of the fixing rod 231 faces the inner cavity of the coaxial tube 6. The inflation sleeve 232 is sleeved on the outer wall of the fixing rod 231, and the inner wall of the inflation sleeve 232 is fixedly bonded to the outer wall of the fixing rod 231 by glue. The circumferential outer wall of the inflation sleeve 232 is used to abut against the circumferential inner wall of the low-pressure inner tube to form a fixing.

[0050] With reference to Figure 3 and Figure 4 When the coaxial tube 6 is correspondingly positioned on the two clamping assemblies 3, the fixing rod 231 is located in the inner cavity of the low-pressure inner tube, the circumferential outer wall of the inflation sleeve 232 abuts against the circumferential inner wall of the low-pressure inner tube to form a fixing, the axis of the fixing rod 231 coincides with the axis of the coaxial tube 6, the driving member 22 drives the fixing rod 231 to rotate and drives the coaxial tube 6 to rotate along the axis thereof, and the welding assembly 4 is used to weld and fix the end of the coaxial tube 6.

[0051] With reference to Figure 3 and Figure 4 The workbench 1 is connected with a gas supply assembly 8. The gas supply assembly 8 comprises a gas supply pump 81, a gas supply pipeline 82 and a gas supply plate 83. The gas supply pump 81 is an inflation pump. The gas supply pump 81 is fixed on the end face of the base 11 by screws. The gas supply plate 83 is welded and fixed on the end face of the rotating disc 12. The gas supply plate 83 is located between the driving member 22 and the clamping seat 31. The end face of the gas supply plate 83 facing the driving member 22 is provided with a gas supply hole 831. The axis of the gas supply hole 831 coincides with the axis of the fixing rod 231. The gas supply hole 831 penetrates the end face of the gas supply plate 83 along the axis thereof.

[0052] With reference to Figure 3 and Figure 4 The circumferential inner wall of the gas supply hole 831 is provided with a gas supply ring channel 832. One end of the gas supply pipeline 82 is communicated with the gas outlet end of the gas supply pump 81. The other end of the gas supply pipeline 82 is fixed on the end face of the gas supply plate 83. The inner cavity of the gas supply pipeline 82 is communicated with the gas supply ring channel 832. The end face of the fixing rod 231 is provided with an air inlet pipeline 84. The air inlet pipeline 84 comprises an air inlet section one 2312, an air inlet section two 2313 and an air inlet section three 2314. The air inlet section one 2312 and the air inlet section two 2313 are communicated at the end portions thereof. The axis of the air inlet section one 2312 is perpendicular to the axis of the fixing rod 231. The end portion of the air inlet section one 2312 away from the air inlet section two 2313 penetrates the end face of the fixing rod 231. The axis of the air inlet section two 2313 is parallel to the axis of the fixing rod 231. One end of the air inlet section three 2314 is connected to the middle portion of the air inlet section two 2313. The other end of the air inlet section three 2314 is communicated with the inner cavity of the inflation sleeve 232. The axis of the air inlet section three 2314 is parallel to the axis of the air inlet section one 2312.

[0053] With reference to Figure 3 andFigure 4 When the fixed rod 231 is inserted into the air supply hole 831 and located in the low-pressure inner tube lumen, the air inlet section one 2312 is connected to the air supply ring channel 832 through the notch of the fixed rod 231, and the gas of the air supply pump 81 enters the air chamber 232 lumen through the air supply pipeline 82, the air supply ring channel 832, and the air inlet pipeline 84 in sequence, so that the air pressure in the air chamber 232 lumen increases and abuts against the low-pressure inner tube lumen, and the abutting force between the fixed part 23 and the coaxial pipe 6 is further improved.

[0054] With reference to Figure 4 , the end of the fixed rod 231 coaxially fixed with the air guide block 9 towards the coaxial pipe 6, the air guide block 9 is an air guide rod in the embodiment of the application, the air inlet section two 2313 is inserted into the end face of the fixed rod 231 away from the air inlet section one 2312, a plurality of air guide flow channels 91 are uniformly and spaced apart on the circumferential outer wall of the air guide block 9, the plurality of air guide flow channels 91 are inserted into the end face of the air guide block 9 towards the fixed rod 231 and connected to the air inlet section two 2313, a plurality of fans 10 are rotationally connected to the circumferential outer wall of the air guide block 9, the fans 10 and the air guide flow channels 91 are one-to-one corresponding, and one of the fan blades of the fan 10 faces the notch of the air guide flow channel 91.

[0055] With reference to Figure 4 , the fixed plate is connected with the opening and closing part 14, the opening and closing part 14 includes the thermal expansion and contraction block one 141, the thermal expansion and contraction block two 142, and the opening and closing block 143, the materials of the thermal expansion and contraction block one 141 and the thermal expansion and contraction block two 142 are both nylon in the embodiment of the application, and have a certain thermal expansion coefficient. The opening and closing groove 2315 is formed on the inner wall of the air inlet section three 2314, one end of the thermal expansion and contraction block one 141 is fixed on the inner wall of the opening and closing groove 2315, the sliding groove 2316 is formed on the inner wall of the air inlet section close to the air guide block 9, the thermal expansion and contraction block two 142 is fixed on the inner wall of the sliding groove 2316 and the opening and closing block 143 one-to-one corresponding, the opening and closing block 143 has the opening and closing hole 1431, the axis of the opening and closing hole 1431 and the axis of the air inlet section two 2313 are parallel to each other, and the opening and closing hole 1431 penetrates the opening and closing block 143 along the axis thereof.

[0056] With reference to Figure 3 and Figure 4, the opening and closing block 143 is separated from the air inlet section two 2313 and the air guide flow channel 91, when the thermal expansion block two 142 is heated and expanded, and drives the opening and closing block 143 to slide towards the axis of the air inlet section two 2313, the opening and closing hole 1431 is connected with the air inlet section two 2313 and the air guide flow channel 91, the gas of the gas supply pump 81 passes through the gas supply pipeline 82, the gas supply ring channel 832, the air inlet section one 2312, the air inlet section two 2313, the opening and closing hole 1431 and the air guide flow channel 91 in sequence and enters the low-pressure inner tube cavity, the fan 10 rotates to drive the air in the low-pressure inner tube cavity to flow, thereby increasing the heat exchange efficiency of the low-pressure inner tube and the air, so that the coaxial tube 6 is not easy to be welded under high temperature, thereby improving the processing quality of the coaxial tube 6; at the same time, the thermal expansion block one 141 is heated and expanded to separate the air inlet section three 2314 and the expansion sleeve 232 cavity, so that the gas pressure in the expansion sleeve 232 is kept constant, thereby ensuring the pressing force between the outer wall of the expansion sleeve 232 and the low-pressure inner tube.

[0057] With reference to Figure 1 , the welding assembly 4 comprises a welding cylinder 41, a welding plate 42 and a flame welding gun 43, the welding cylinder 41 is fixed on the end face of the base 11 by screws, the welding plate 42 is fixed on the end of the piston rod of the welding cylinder 41 by welding, the welding cylinder 41 drives the welding plate 42 to slide towards the axis of the rotating disc 12, the welding plate 42 is located on the side of the welding cylinder 41 close to the axis of the rotating disc 12, and the flame welding gun 43 is fixed on the side of the welding plate 42 close to the rotating disc 12 by screws, and the welding end of the flame welding gun 43 is towards the axis of the rotating disc 12.

[0058] With reference to Figure 1 , when the rotating part 13 drives the rotating disc 12 to rotate, the two ends of the coaxial tube 6 correspond to the welding ends of the two flame welding guns 43 respectively, the welding cylinder 41 drives the welding plate 42 to slide towards the axis of the rotating disc 12, the welding end of the flame welding gun 43 abuts against the connection between the high-pressure outer sleeve and the low-pressure inner tube, the driving part 22 drives the coaxial tube 6 to rotate along the axis of the coaxial tube 6, and the welding end of the flame welding gun 43 is welded and fixed to the circumferential outer wall of the end of the coaxial tube 6, thereby realizing automatic welding of the circumferential outer wall of the end of the coaxial tube 6, and the staff does not need to hold the flame welding gun 43 to adjust the posture to weld and fix the circumferential outer wall of the end of the coaxial tube 6, thereby improving the processing efficiency of the coaxial tube 6 and reducing the processing cost of the coaxial tube 6.

[0059] With reference to Figure 1 , the polishing assembly 5 comprises a polishing cylinder 51, a polishing plate 52, a polishing motor 53 and a polishing head 54, the polishing cylinder 51 is fixed on the end face of the base 11 by screws, the polishing plate 52 is fixed on the end of the piston rod of the polishing cylinder 51 by welding, the polishing cylinder 51 drives the polishing plate 52 to slide towards the axis of the rotating disc 12, and the polishing plate 52 is located on the side of the polishing cylinder 51 close to the rotating disc 12.

[0060] With reference toFigure 1 The polishing motor 53 is fixed on the end face of the polishing plate 52 by screws, the motor shaft of the polishing motor 53 faces the end face of the rotating disc 12, and the grinding head 54 is coaxially welded and fixed on the end of the motor shaft of the polishing motor 53, and the grinding head 54 is used for polishing the circumferential outer wall of the end of the welded coaxial pipe 6.

[0061] With reference to Figure 1 When the rotating member 13 drives the rotating disc 12 to rotate, the two ends of the welded coaxial pipe 6 correspondingly face the two polishing assemblies 5, the polishing cylinder 51 drives the polishing plate 52 to slide towards the direction close to the rotating axis of the rotating disc 12, the grinding head 54 abuts against the end of the coaxial pipe 6, the polishing motor 53 drives the grinding head 54 to rotate, the polishing of the end of the coaxial pipe 6 is realized, the rotating assembly 2 drives the coaxial pipe 6 to rotate along the axis thereof, the polishing of the circumferential outer wall of the end of the coaxial pipe 6 is completed, the end face of the coaxial pipe 6 is not easy to produce burrs, and thus the processing quality of the coaxial pipe 6 is improved.

[0062] The implementation principle of the embodiment of the automobile air conditioner pipe coaxial pipe section welding device is as follows: the two ends of the coaxial pipe 6 are embedded in the two fixed arc grooves one 321 correspondingly, the limiting piece 33 drives the limiting plate 32 to slide towards the direction close to the clamping seat 31, the end face of the limiting plate 32 abuts against the end face of the clamping seat 31, the fixed arc groove one 321 and the fixed arc groove two 311 are spliced to form a fixed ring groove, the axis of the fixed ring groove coincides with the axis of the coaxial pipe 6, the end face of the elastic part 312 abuts against the circumferential outer wall of the end of the coaxial pipe 6 to form a limit, the coaxial pipe 6 is not easy to deviate on the end face of the rotating disc 12, and thus the processing precision of the coaxial pipe 6 is improved; the two ends of the coaxial pipe 6 correspondingly face the two welding ends of the flame welding gun 43, the welding cylinder 41 drives the welding plate 42 to slide towards the direction close to the rotating axis of the rotating disc 12, the welding end of the flame welding gun 43 abuts against the connection between the high-pressure outer sleeve pipe and the low-pressure inner pipe, the driving piece 22 drives the coaxial pipe 6 to rotate along the axis thereof, the welding end of the flame welding gun 43 welds and fixes the circumferential outer wall of the end of the coaxial pipe 6, the automatic welding of the circumferential outer wall of the end of the coaxial pipe 6 is realized, and a worker is not needed to hold the flame welding gun 43 to adjust the posture to weld and fix the circumferential outer wall of the end of the coaxial pipe 6, thus the processing efficiency of the coaxial pipe 6 is improved, and the processing cost of the coaxial pipe 6 is reduced.

[0063] Meanwhile, the rotating member 13 drives the rotating disc 12 to rotate, the two ends of the welded coaxial pipe 6 correspondingly face the two polishing assemblies 5, the polishing cylinder 51 drives the polishing plate 52 to slide towards the direction close to the rotating axis of the rotating disc 12, the grinding head 54 abuts against the end of the coaxial pipe 6, the polishing motor 53 drives the grinding head 54 to rotate, the polishing of the end of the coaxial pipe 6 is realized, the rotating assembly 2 drives the coaxial pipe 6 to rotate along the axis thereof, the polishing of the circumferential outer wall of the end of the coaxial pipe 6 is completed, the end face of the end of the coaxial pipe 6 is not easy to produce burrs, and thus the processing quality of the coaxial pipe 6 is improved.

[0064] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: all equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. A welding device for coaxial pipe sections of automotive air conditioning pipes, characterized in that: The assembly includes a worktable (1), a clamping assembly (3), a rotating assembly (2), and a welding assembly (4). The clamping assembly (3), rotating assembly (2), and welding assembly (4) are all connected to the end face of the worktable (1). The clamping assembly (3) is used to clamp the coaxial tube (6) and confine it to the end face of the worktable (1). The welding assembly (4) is used to weld the end of the coaxial tube (6) confined to the worktable (1). The rotating assembly (2) includes a driving member (22) and a fixing member (23). The fixing member (23) is connected to the driving member (22), and the driving member (22) drives the fixing member (23) to rotate. The fixing component (23) is used to abut against the inner wall of the low-pressure inner tube to form a fixation. The rotation axis of the fixing component (23) coincides with the axis of the coaxial tube (6). When the driving component (22) drives the fixing component (23) to rotate, it drives the coaxial tube (6) to rotate. The welding assembly (4) welds and fixes the circumferential outer wall of the end of the coaxial tube (6). The fixing component (23) includes a fixing rod (231) and an expansion sleeve (232). The expansion sleeve (232) is sleeved on the outer wall of the fixing rod (231). The circumferential outer wall of the expansion sleeve (232) is used to abut against the circumferential inner wall of the low-pressure inner tube to form a fixation. The fixing rod (231) is fixed on the driving component (22). When the coaxial tube (6) rotates, the fixing component (23) rotates. 6) When the clamping component (3) is positioned on the clamping assembly, the fixing member (23) is located in the inner cavity of the low-pressure inner tube, and the outer circumferential wall of the expansion sleeve (232) abuts against the inner circumferential wall of the low-pressure inner tube to form a fixation; the workbench (1) is connected to an air supply assembly (8), the air supply assembly (8) includes an air supply pump (81), an air supply pipe (82) and an air supply plate (83), the air supply plate (83) has an air supply hole (831) through which the fixing rod (231) passes, the inner wall of the air supply hole (831) is provided with an air supply ring channel (832) in the circumferential direction, and the two ends of the air supply pipe (82) are connected one-to-one to the air outlet of the air supply pump (81) and the air supply ring channel. (832) Inner cavity; an air inlet pipe (2311) is provided on the fixed rod (231), and the air inlet pipe (2311) is connected to the inner cavity of the expansion sleeve (232); when one end of the fixed rod (231) passes through the air supply hole (831) and is located in the inner cavity of the low-pressure inner tube, the end of the air inlet pipe (2311) away from the expansion sleeve (232) is connected to the air supply loop (832), and the gas in the air supply pump (81) passes through the air supply pipe (82), the air supply loop (832), and the air inlet pipe (2311) in sequence and enters the inner cavity of the expansion sleeve (232), and the air pressure in the inner cavity of the expansion sleeve (232) increases and presses against the inner cavity of the low-pressure inner tube;The end of the fixed rod (231) away from the driving component (22) is connected to an air guide block (9). The air guide block (9) has multiple air guide channels (91) on its circumferential outer wall, all of which are connected to the air intake pipe (2311). An opening and closing element (14) is connected to the fixed rod (231). When the fixed rod (231) heats up, the opening and closing element (14) separates the inner cavity of the expansion sleeve (232) from the air intake pipe (2311), while simultaneously connecting the air guide channels (91) and the air intake pipe (2311).

2. The coaxial pipe section welding device for automotive air conditioning pipes according to claim 1, characterized in that: The clamping assembly (3) includes a clamping seat (31), a limiting plate (32), and a limiting member (33). The bottom wall of the clamping seat (31) is connected to the end face of the workbench (1). The limiting member (33) is connected to the end face of the clamping seat (31). The limiting plate (32) is connected to the moving end of the limiting member (33). The limiting member (33) drives the limiting plate (32) to approach the clamping seat (31). The end face of the limiting plate (32) facing the clamping seat (31) is provided with a first fixing arc groove (321). The end face of the clamping seat (31) facing the limiting plate (32) is provided with a second fixing arc groove (311). When the limiting member (33) drives the limiting member to move, the limiting member moves the limiting plate (32) to move. When the plate (32) slides toward the clamping seat (31), the first fixed arc groove (321) and the second fixed arc groove (311) are joined together to form a fixed ring groove. The fixed ring groove is used to accommodate the end of the coaxial tube (6), and the axis of the fixed ring groove coincides with the rotation axis of the fixing member (23). When the end of the coaxial tube (6) is embedded in the first fixed arc groove (321), the limiting member (33) drives the limiting plate (32) to slide toward the clamping seat (31). The first fixed arc groove (321) and the second fixed arc groove (311) are joined together to form a fixed ring groove, and the inner wall of the fixed ring groove abuts against the outer wall of the coaxial tube (6) to form a limit.

3. The coaxial pipe section welding device for automotive air conditioning pipes according to claim 2, characterized in that: The inner walls of both the first fixed arc groove (321) and the second fixed arc groove (311) have elastic portions (312), and the end face of the elastic portion (312) is used to abut against the outer wall of the coaxial tube (6).

4. The coaxial pipe section welding device for automotive air conditioning pipes according to claim 1, characterized in that: The air guide block (9) has multiple fans (10) connected to its outer circumferential wall. Each fan (10) corresponds to an air guide channel (91), and one of the fan blades of the fan (10) faces the slot of the air guide channel (91).

5. The coaxial pipe section welding device for automotive air conditioning pipes according to claim 1, characterized in that: A grinding assembly (5) is connected to the workbench (1), which is used to grind the end of the coaxial tube (6) after welding.

6. The coaxial pipe section welding device for automotive air conditioning pipes according to claim 5, characterized in that: The workbench (1) includes a base (11) and a rotating disk (12). The rotating disk (12) is rotatably connected to the base (11). The clamping assembly (3) is connected to the rotating disk (12). The welding assembly (4) and the grinding assembly (5) are connected to the base (11). The welding end of the welding assembly (4) and the grinding end of the grinding assembly (5) both face the clamping assembly (3). When the welding assembly (4) finishes welding the end of the coaxial tube (6) that is limited to the clamping assembly (3), the rotating disk (12) rotates and drives the end of the coaxial tube (6) that has been welded on the clamping assembly (3) to face the grinding assembly (5).

7. The coaxial pipe section welding device for automotive air conditioning pipes according to claim 6, characterized in that: The worktable (1) also includes a rotating component (13), which drives the rotating disk (12) to rotate.

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