Automatic assembling and welding device for electronic expansion valve of automobile air conditioner

Abstract

The invention discloses an automatic assembling and welding device for an electronic expansion valve of an automobile air conditioner, which is applied to the technical field of automatic assembling and welding devices for electronic expansion valves. A feeding and discharging argon arc welding assembly, a cooling assembly, an automatic refrigerant filling assembly, a valve body transferring assembly, a sealing cover feeding and assembling assembly and a sealing cover energy storage welding assembly are sequentially arranged in the conveying direction of the double-layer conveying line. Meanwhile, a conveying mechanical arm used for conveying the assembled electronic expansion valve from the sealing cover feeding and assembling assembly to the sealing cover energy storage welding assembly is further arranged; the method has the technical effects that the assembling and welding efficiency is improved, and the cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of automatic assembly and welding equipment for electronic expansion valves, and particularly to an automatic assembly and welding equipment for automotive air conditioning electronic expansion valves. Background Technology

[0002] In modern industrial production, the electronic expansion valve is a key component in automotive air conditioning refrigeration systems, and its welding quality directly affects the product's performance and reliability.

[0003] As attached Figure 1 The illustrated electronic expansion valve for automotive air conditioning mainly includes a lower valve body cover and an upper valve body cover welded to the lower valve body cover. A refrigerant-containing cavity is formed between the upper and lower valve body covers. A filling port is provided on the upper valve body cover, and a sealing cap is provided to close the filling port. During the welding process, the edges of the upper and lower valve body covers must first be welded together. Then, refrigerant is filled into the cavity. Finally, the sealing cap is welded to the upper valve body cover. The welding temperature must be strictly controlled during the welding process. In the existing technology, the automation level of the assembly and welding of automotive air conditioning electronic expansion valves is low, resulting in low welding efficiency and high cost. Therefore, it is necessary to design an automated assembly and welding device to improve the welding efficiency of electronic expansion valves and reduce their assembly cost. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic assembly and welding device for automotive air conditioning electronic expansion valves, which has the advantages of improving assembly and welding efficiency and reducing costs.

[0005] The above-mentioned technical objective of the present invention is achieved through the following technical solution: an automatic assembly and welding device for an automotive air conditioning electronic expansion valve, comprising a double-layer conveyor line; along the conveying direction of the double-layer conveyor line, there are sequentially arranged a loading and unloading argon arc welding assembly, a cooling assembly, an automatic refrigerant filling assembly, a valve body transfer assembly, a sealing cover loading and assembly assembly, and a sealing cover energy storage welding assembly; and there is also a conveying robotic arm for conveying the assembled electronic expansion valve from the sealing cover loading and assembly assembly assembly to the sealing cover energy storage welding assembly.

[0006] The invention is further configured such that: the loading and unloading argon arc welding assembly includes a welding seat and a welding frame fixedly connected to the welding seat; the argon arc welding station of the welding seat is provided with several universal ball bearings for moving the valve body positioning tray carrying the valve body; the welding seat is respectively fixedly connected with a side positioning block and an end positioning block for positioning and blocking the valve body positioning tray along one side and the end along the conveying direction; the welding seat is slidably connected to the other side of the valve body positioning tray along the conveying direction based on a first horizontal screw slide for positioning the other side of the valve body positioning tray. A side sliding positioning block provides positioning during the unloading process of the valve body positioning tray. The welding seat is slidably connected to a second horizontal screw slide for pushing the valve body positioning tray onto the double-layer conveyor line to achieve unloading. The welding frame is slidably connected to a loading frame based on a third horizontal screw slide. The loading frame is slidably connected to a loading pusher based on a first lifting cylinder along the vertical direction for pushing the valve body positioning tray from the double-layer conveyor line into the argon arc welding station. The welding seat is also provided with a welding assembly for welding the edge of the valve body.

[0007] The invention is further configured such that: the welding assembly includes an argon arc welding head fixedly connected to the welding frame in the vertical direction based on a second lifting cylinder and a lifting rod slidably connected to the welding seat in the vertical direction based on a third lifting cylinder; a rotary drive motor is fixedly connected to the welding seat to drive the lifting rod to rotate, thereby driving the valve body to rotate in the valve body positioning tray for welding.

[0008] The present invention is further configured such that: the cooling assembly includes a cooling cavity fixedly connected to the double-layer conveyor line and a plurality of cooling fans fixedly connected to the top of the cooling cavity along the conveying direction for blowing air onto the welded valve body to reduce the valve body temperature.

[0009] The present invention is further configured such that: the refrigerant automatic filling assembly includes a fixed filling seat and a filling lifting cylinder fixedly connected to the filling seat in a vertical direction, wherein the lifting end of the filling lifting cylinder is fixedly connected to a filling pipe for filling refrigerant into the valve body.

[0010] The present invention is further configured such that: the valve body transfer assembly includes a transfer sliding seat fixedly arranged along the conveying direction perpendicular to the double-layer conveyor line and at least two sets of sliding mounting seats slidably connected to the transfer sliding seat; the sliding mounting seat is slidably connected in the vertical direction to a transfer lifting cylinder for lifting the transfer seat; at least one first vacuum nozzle for sucking the valve body out of the valve body positioning tray is fixedly connected to the lifting transfer seat; and the transfer sliding seat is provided with a sliding drive assembly for driving the sliding mounting seat to slide.

[0011] The present invention is further configured such that: the sliding drive assembly includes a drive rack fixedly connected to the transfer sliding seat along the conveying direction perpendicular to the double-layer conveyor line; a drive gear meshing with the drive rack is rotatably connected to the sliding mounting seat; and a sliding drive motor that drives the drive gear to rotate is fixedly connected to the sliding mounting seat.

[0012] The present invention is further configured such that: the sealing cap feeding assembly includes an assembly base and a vibrating feeder feeding line and a valve body feeding line fixedly connected to the assembly base for feeding the sealing cap; a valve body positioning assembly base is fixedly connected between the vibrating feeder feeding line and the valve body feeding line; a horizontal sliding seat is slidably connected to the assembly base based on a third horizontal lead screw slide; a vertical adsorption seat and a vertical clamping seat are slidably connected to the horizontal sliding seat along the vertical direction; a second vacuum nozzle for adsorbing the valve body and a sealing cap clamping cylinder for clamping the sealing cap are fixedly connected to the vertical adsorption seat and the vertical clamping seat, respectively; a clamping claw is fixedly connected to the clamping end of the sealing cap clamping cylinder; and a fourth lifting cylinder is fixedly connected to the horizontal sliding seat to drive the vertical adsorption seat and the vertical clamping seat to rise and fall.

[0013] The present invention is further configured such that: the closed cover energy storage welding assembly includes a lower welding seat that is movably arranged in the vertical direction based on a lifting cylinder and an upper welding seat that is movably arranged in the vertical direction based on a pressing cylinder; a transformer for providing voltage transformation for the energy storage welding process is fixedly connected to the lower welding seat and the upper welding seat; and an air guide hole is provided on the lower welding seat.

[0014] The invention is further configured such that: the two ends of the double-layer conveyor line are fixedly connected with lifting conveyor components for lifting and lowering the valve body positioning tray; the lifting conveyor components include a fixedly installed lifting conveyor seat and a lifting conveyor belt slidably connected to the lifting conveyor seat in the vertical direction; and a lifting conveyor cylinder for driving the lifting conveyor belt to lift and lower is fixedly connected to the lifting conveyor seat in the vertical direction.

[0015] In summary, the present invention has the following beneficial effects: 1. By integrating multiple modules such as loading / unloading argon arc welding components, cooling components, automatic refrigerant filling components, valve body transfer components, sealing cap loading and assembly components, and sealing cap energy storage welding components through a double-layer conveyor line, the entire assembly and welding process of automotive air conditioning electronic expansion valves is automated: In the loading / unloading argon arc welding components, the welding seat uses side positioning blocks, end positioning blocks, and side sliding positioning blocks to position the valve body positioning tray carrying the valve body on three sides. The loading rack drives the loading pusher to push the tray from the double-layer conveyor line into the argon arc welding station. The unloading pusher pushes the completed welding tray back to the conveyor line. The rotary drive motor drives the lifting rod to rotate the valve body, and the argon arc welding head moves along the edge of the valve body to complete the automated welding of the circumferential weld, avoiding manual positioning errors and improving welding efficiency. After welding, the valve body enters the cooling chamber, where a cooling fan blows air to lower the valve body temperature and prevent refrigerant evaporation. In the automatic refrigerant filling components, the filling lifting cylinder drives the filling pipe to descend to the valve body filling port, realizing the automatic injection of refrigerant into the valve body. In the valve body transfer assembly, the sliding mounting seat moves laterally through the meshing of the drive gear and drive rack. The transfer lifting cylinder drives the lifting transfer seat to rise and fall. The first vacuum nozzle picks up the valve body and transfers it to the next station, realizing the cross-line transfer of the valve body and shortening the material turnover path. In the sealing cover loading and assembly assembly, the vibrating material tray loading line and the valve body loading line respectively transport the sealing cover and the valve body to the valve body positioning assembly seat. The horizontal sliding seat drives the vertical adsorption seat and the vertical clamping seat to move synchronously. The fourth lifting cylinder controls the two to accurately align and complete the pre-assembly of the sealing cover and the valve body. The pre-assembled valve body is transferred by the conveying robotic arm to the sealing cover energy storage welding assembly. The lifting cylinder and the pressing cylinder push the lower welding seat and the upper welding seat to clamp the valve body. The transformer provides high-energy pulse current, and the vent hole discharges welding gas. The energy storage welding technology shortens the welding time, reduces thermal deformation, and improves the welding qualification rate, thereby improving the automation level of the electronic expansion valve welding process, reducing human operation errors, shortening the assembly and welding time of a single product, and reducing production costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the electronic expansion valve in this embodiment; Figure 2 This is a schematic diagram of the overall structure of this embodiment; Figure 3 This is a schematic diagram of the structure of the loading and unloading argon arc welding assembly in this embodiment; Figure 4 yes Figure 3 Enlarged schematic diagram of part A; Figure 5 yes Figure 3 Enlarged diagram of part B; Figure 6 This is a schematic diagram of the structure of the automatic refrigerant charging assembly in this embodiment; Figure 7This is a schematic diagram of the valve body transfer assembly in this embodiment; Figure 8 yes Figure 7 Enlarged schematic diagram of part C; Figure 9 This is a schematic diagram of the structure of the closed cover feeding assembly component in this embodiment; Figure 10 yes Figure 9 Enlarged schematic diagram of part D; Figure 11 This is a schematic diagram of the structure of the closed-cover energy storage welding assembly in this embodiment; Figure 12 yes Figure 11 Enlarged schematic diagram of part E; Figure 13 This is a structural schematic diagram of the lifting and conveying assembly in this embodiment.

[0017] Reference numerals: 1. Double-layer conveyor line; 2. Loading and unloading argon arc welding assembly; 21. Welding seat; 22. Welding frame; 23. Universal ball bearing; 24. Side positioning block; 25. End positioning block; 26. First horizontal screw slide; 27. Side sliding positioning block; 28. Second horizontal screw slide; 29. ​​Unloading push block; 210. Third horizontal screw slide; 211. Loading rack; 212. First lifting cylinder; 213. Loading push block; 214. Valve body positioning tray; 215. Welding assembly; 216. Second lifting cylinder; 217. Argon arc welding head; 218. Third lifting cylinder; 219. Lifting rod; 220. Rotary drive motor; 3. Cooling assembly; 31. Cooling chamber; 32. Cooling fan; 4. Automatic refrigerant charging assembly; 41. Charging seat; 42. Charging lifting cylinder; 43. Charging pipe; 5. Valve body transfer assembly; 51. Transfer sliding seat; 52. Sliding mounting seat; 53. Transfer lifting cylinder; 54. 55. Lifting and transferring seat; 56. First vacuum nozzle; 57. Sliding drive assembly; 58. Drive rack; 59. Drive gear; 50. Sliding drive motor; 60. Sealing cover loading assembly assembly; 61. Assembly seat; 62. Vibrating feeder loading line; 63. Valve body loading line; 64. Valve body positioning assembly seat; 65. Fourth horizontal lead screw slide; 66. Horizontal sliding seat; 67. Vertical suction seat; 68. Vertical clamping seat; 69. Second vacuum nozzle; 61. 0. Sealing cover clamping cylinder; 611. Gripper; 612. Fourth lifting cylinder; 7. Sealing cover energy storage welding assembly; 71. Lifting cylinder; 72. Lower welding seat; 73. Pressing cylinder; 74. Upper welding seat; 75. Transformer; 76. Air guide hole; 8. Conveying robotic arm; 9. Electronic expansion valve; 91. Valve body; 92. Sealing cover; 10. Lifting and conveying assembly; 101. Lifting and conveying seat; 102. Lifting and conveying belt; 103. Lifting and conveying cylinder. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings.

[0019] Example: refer to Figures 1 to 13 An automatic assembly and welding device for an automotive air conditioning electronic expansion valve includes a double-layer conveyor line 1. Along the conveying direction of the double-layer conveyor line 1, there are sequentially arranged a loading and unloading argon arc welding assembly 2, a cooling assembly 3, an automatic refrigerant filling assembly 4, a valve body transfer assembly 5, a sealing cap loading and assembly assembly 6, and a sealing cap energy storage welding assembly 7. A conveying robotic arm 8 is also provided to transport the assembled electronic expansion valve 9 from the sealing cap loading and assembly assembly 6 to the sealing cap energy storage welding assembly 7. The loading and unloading argon arc welding assembly 2 welds the upper and lower covers of the valve body 91 of the electronic expansion valve 9 before feeding it into the double-layer conveyor line 1. The cooling assembly 3 is used to rapidly cool the welded valve body 91 to prevent refrigerant from entering the valve body 91. The refrigerant evaporates rapidly, and the cooled valve body 91 is transported to the refrigerant automatic filling component 4 via the double-layer conveyor line 1 to automatically fill the valve body 91 with refrigerant. Then, the valve body 91 is transported to the sealing cover loading and assembly component 6 via the valve body transfer component 5 to install the sealing cover 92 onto the valve body 91. Finally, the robotic arm transports the pre-assembled electronic expansion valve 9 to the sealing cover energy storage welding component 7 for automatic welding. The robotic arm is equipped with a vacuum suction cup for picking up the pre-assembled electronic expansion valve 9. At both ends of the double-layer conveyor line 1 along the vertical direction, there are fixed lifting and conveying components 10 for lifting and lowering the valve body positioning tray 214. The lifting and conveying components 10 are used to reciprocate the valve body positioning tray 214.

[0020] refer to Figure 13 Specifically, the lifting and conveying assembly 10 includes a fixedly installed lifting and conveying seat 101 and a lifting and conveying belt 102 slidably connected to the lifting and conveying seat 101 in the vertical direction. A lifting and conveying cylinder 103 for driving the lifting and conveying belt 102 to rise and fall is fixedly connected to the lifting and conveying seat 101 in the vertical direction. The lifting and conveying cylinder 103 drives the lifting and conveying belt 102 to rise and fall within the lifting and conveying seat 101, thereby realizing the reciprocating conveying of the valve body positioning tray 214.

[0021] refer to Figures 3 to 5Specifically, the loading and unloading argon arc welding assembly 2 includes a welding seat 21 and a welding frame 22 fixedly connected to the welding seat 21. Several universal balls 23 are provided at the argon arc welding station of the welding seat 21 for moving the valve body positioning tray 214 carrying the valve body 91. Side positioning blocks 24 and end positioning blocks 25 for positioning and blocking the valve body positioning tray 214 along the conveying direction are fixedly connected to the welding seat 21. On the other side of the valve body positioning tray 214 along the conveying direction, a first horizontal screw slide 26 is slidably connected to the welding seat 21 for positioning the valve body positioning tray 214 on the other side of the valve body positioning tray 214. During the unloading process of the valve body positioning tray 214, a side sliding positioning block 27 provides positioning. A unloading pusher 29, slidably connected to the welding seat 21 based on a second horizontal screw slide 28, pushes the valve body positioning tray 214 onto the double-layer conveyor line 1 to achieve unloading. A loading rack 211, slidably connected to the welding frame 22 based on a third horizontal screw slide 210, has a loading pusher 213 slidably connected to the loading rack 211 along the vertical direction based on a first lifting cylinder 212, pushing the valve body positioning tray 214 from the double-layer conveyor line 1 into the argon arc welding station. The valve body positioning tray 214 is thus positioned via the side positioning block 24, the end positioning block 25, and the side sliding positioning block 27. The positioning of the valve body positioning tray 214 is achieved by a positioning abutment block on the welding seat 21, based on an abutment cylinder, which abuts the valve body positioning tray 214 against the side sliding positioning block 27 to achieve complete positioning of the valve body positioning tray 214. When the valve body 91 is welded and needs to be unloaded, the second horizontal screw slide 28 drives the unloading push block 29 to push the valve body positioning tray 214 outward onto the double-layer conveyor line 1 to complete the unloading. During the unloading process, the first horizontal screw slide 26 drives the side sliding positioning block 27 to continuously abut against the valve body positioning tray 214 along the end of the double-layer conveyor line 1 in the conveying direction to ensure that the valve body positioning tray 214 is aligned with the end of the conveying direction. The conveying direction is used to avoid the valve body positioning tray 214 from tilting during the conveying process. When it is necessary to load the material, the first horizontal screw slide 26 drives the side sliding positioning block 27 to extend into the double-layer conveying line 1 to block the valve body positioning tray 214. Then, the third horizontal screw slide 210 drives the loading frame 211 and the loading push block 213 to abut against the valve body positioning tray 214 and push the valve body positioning tray 214 inward to complete the loading. The worker places the lower cover of the valve body 91 and the upper cover of the valve body 91 into the valve body positioning tray 214 in sequence. The welding seat 21 is also equipped with a welding component 215 for welding the edge of the valve body 91.The welding assembly 215 includes an argon arc welding head 217 fixedly connected to the welding frame 22 in the vertical direction based on a second lifting cylinder 216, and a lifting rod 219 slidably connected to the welding seat 21 in the vertical direction based on a third lifting cylinder 218. A rotary drive motor 220 is fixedly connected to the welding seat 21 to drive the lifting rod 219 to rotate, thereby driving the valve body 91 to rotate within the valve body positioning tray 214 for welding. The rotary drive motor 220 drives the lifting rod 219 to rotate the valve body 91, and the argon arc welding head 217 moves along the edge of the valve body 91 to complete the automated welding of the annular weld.

[0022] refer to Figure 2 Specifically, the cooling assembly 3 includes a cooling chamber 31 fixedly connected to the double-layer conveyor line 1 and several cooling fans 32 fixedly connected to the top of the cooling chamber 31 along the conveying direction for blowing air onto the welded valve body 91 to reduce the temperature of the valve body 91. The welded valve body 91 enters the cooling chamber 31, and the cooling fans 32 blow air to cool down the valve body 91 and prevent refrigerant from evaporating.

[0023] refer to Figure 2 and Figure 6 Specifically, the refrigerant automatic filling assembly 4 includes a fixed filling seat 41 and a filling lifting cylinder 42 fixedly connected to the filling seat 41 in the vertical direction. A filling pipe 43 for filling refrigerant into the valve body 91 is fixedly connected to the lifting end of the filling lifting cylinder 42. In the refrigerant automatic filling assembly 4, the filling lifting cylinder 42 drives the filling pipe 43 to descend to the filling port of the valve body 91, thereby realizing the automatic injection of refrigerant into the valve body 91.

[0024] refer to Figure 7 and Figure 8Specifically, the valve body transfer assembly 5 includes a transfer sliding seat 51 fixedly arranged along the conveying direction perpendicular to the double-layer conveyor line 1, and at least two sets of sliding mounting seats 52 slidably connected to the transfer sliding seat 51. A lifting transfer seat 54 is slidably connected to the sliding mounting seat 52 along the vertical direction based on the transfer lifting cylinder 53. At least one first vacuum nozzle 55 for sucking the valve body 91 out of the valve body positioning tray 214 is fixedly connected to the lifting transfer seat 54. A sliding drive assembly 56 is provided on the transfer sliding seat 51 for driving the sliding mounting seat 52 to slide. The sliding drive assembly 56 includes... A drive rack 561 is fixedly connected to the transfer slide seat 51 along the conveying direction perpendicular to the double-layer conveyor line 1. A drive gear 562 that meshes with the drive rack 561 is rotatably connected to the slide mounting seat 52. A slide drive motor 563 that drives the drive gear 562 to rotate is fixedly connected to the slide mounting seat 52. The slide mounting seat 52 moves laterally through the meshing of the drive gear 562 and the drive rack 561. The transfer lifting cylinder 53 drives the lifting transfer seat 54 to rise and fall. The first vacuum nozzle 55 picks up the valve body 91 and transfers it to the next station, realizing the cross-line transfer of the valve body 91 and shortening the material turnover path.

[0025] refer to Figure 9 and Figure 10 Specifically, the sealing cap feeding assembly 6 includes an assembly base 61 and a vibrating feeder line 62 for feeding the sealing cap 92 and a valve body feeding line 63 for feeding the valve body 91, both fixedly connected to the assembly base 61. A valve body positioning assembly base 64 is fixedly connected between the assembly base 61 and the vibrating feeder line 62 and the valve body feeding line 63. A horizontal sliding seat 66 is also slidably connected to the assembly base 61 based on a fourth horizontal lead screw slide 65. A vertical suction seat 67 and a vertical clamping seat 68 are slidably connected to the horizontal sliding seat 66 along the vertical direction. A second vacuum nozzle for adsorbing the valve body 91 and a clamping nozzle for holding the sealing cap 91 are fixedly connected to the vertical suction seat 67 and the vertical clamping seat 68, respectively. The closing cover 92 is clamped by a closing cover holding cylinder 610. A gripper 611 is fixedly connected to the clamping end of the closing cover holding cylinder 610. A fourth lifting cylinder 612 is fixedly connected to the horizontal sliding seat 66 to drive the vertical adsorption seat 67 and the vertical clamping seat 68 to lift and lower. The vibrating material tray feeding line 62 and the valve body feeding line 63 respectively transport the closing cover 92 and the valve body 91. The second vacuum nozzle is driven to move through the fourth horizontal screw slide 65, thereby transporting the valve body 91 from the valve body feeding line 63 to the valve body positioning assembly seat 64. Then, the closing cover holding cylinder 610 drives the gripper 611 to clamp the closing cover 92, thereby installing the closing cover 92 on the valve body 91 and completing the pre-assembly of the closing cover 92 and the valve body 91.

[0026] refer to Figure 11 and Figure 12Specifically, the sealed cover energy storage welding assembly 7 includes a lower welding seat 72 that moves vertically based on a lifting cylinder 71 and an upper welding seat 74 that moves vertically based on a pressing cylinder 73. A transformer 75 for providing voltage transformation for the energy storage welding process is fixedly connected to the lower welding seat 72 and the upper welding seat 74. An air guide hole 76 is opened on the lower welding seat 72. The vibrating material tray feeding line 62 and the valve body feeding line 63 respectively transport the sealed cover 92 and the valve body 91 to the valve body positioning assembly seat 64. The horizontal sliding seat 66 drives the vertical adsorption seat 67 and the vertical clamping seat 68 to move synchronously. The fourth lifting cylinder 612 controls the two to be precisely aligned, completing the pre-assembly of the sealed cover 92 and the valve body 91.

[0027] Brief description of the usage process: The loading and unloading argon arc welding assembly 2 welds the upper cover and lower cover of the valve body 91 of the electronic expansion valve 9 and then sends them into the double-layer conveyor line 1. The cooling assembly 3 is used to quickly cool the welded valve body 91 to prevent the refrigerant injected into the valve body 91 from evaporating rapidly. After cooling, the valve body 91 is conveyed to the refrigerant automatic filling assembly 4 through the double-layer conveyor line 1 to automatically fill the refrigerant into the valve body 91. Then, the valve body transfer assembly 5 conveys the valve body 91 to the sealing cover 92 loading assembly to install the sealing cover 92 onto the valve body 91. Finally, the robotic arm conveys the initially assembled electronic expansion valve 9 to the sealing cover energy storage welding assembly 7 for automatic welding.

[0028] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make inventive modifications to this embodiment as needed, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. An automatic assembly and welding device for an automotive air conditioning electronic expansion valve, comprising a double-layer conveyor line (1); characterized in that, Along the conveying direction of the double-layer conveyor line (1), there are sequentially arranged loading and unloading argon arc welding assembly (2), cooling assembly (3), refrigerant automatic filling assembly (4), valve body transfer assembly (5), closed cover loading assembly assembly (6) and closed cover energy storage welding assembly (7). At the same time, there is also a conveying robot arm (8) for conveying the assembled electronic expansion valve (9) from the closed cover loading assembly assembly assembly (6) to the closed cover energy storage welding assembly assembly (7).

2. The automatic assembly and welding device for an automotive air conditioning electronic expansion valve according to claim 1, characterized in that, The loading and unloading argon arc welding assembly (2) includes a welding seat (21) and a welding frame (22) fixedly connected to the welding seat (21). The argon arc welding station of the welding seat (21) is provided with several universal ball bearings (23) for moving the valve body positioning tray (214) carrying the valve body (91). The welding seat (21) is fixedly connected with a side positioning block (24) and an end positioning block (25) for positioning and blocking the valve body positioning tray (214) along one side and the end along the conveying direction. The welding seat (21) is slidably connected to the other side of the valve body positioning tray (214) along the conveying direction based on a first horizontal screw slide (26). A side sliding positioning block (27) provides positioning during the unloading process. The welding seat (21) is slidably connected to a second horizontal screw slide (28) for pushing the valve body positioning tray (214) onto the double-layer conveyor line (1) to realize unloading. The welding frame (22) is slidably connected to a loading frame (211) based on a third horizontal screw slide (210). The loading frame (211) is slidably connected to a loading push block (213) based on a first lifting cylinder (212) in the vertical direction for pushing the valve body positioning tray (214) from the double-layer conveyor line (1) into the argon arc welding station. The welding seat (21) is also provided with a welding assembly (215) for welding the edge of the valve body (91).

3. The automatic assembly and welding device for an automotive air conditioning electronic expansion valve according to claim 2, characterized in that, The welding assembly (215) includes an argon arc welding head (217) fixedly connected to the welding frame (22) in the vertical direction based on a second lifting cylinder (216) and a lifting rod (219) slidably connected to the welding seat (21) in the vertical direction based on a third lifting cylinder (218). A rotary drive motor (220) is fixedly connected to the welding seat (21) to drive the lifting rod (219) to rotate, thereby driving the valve body (91) to rotate in the valve body positioning tray (214) for welding.

4. The automatic assembly and welding device for an automotive air conditioning electronic expansion valve according to claim 1, characterized in that, The cooling assembly (3) includes a cooling chamber (31) fixedly connected to the double-layer conveyor line (1) and several cooling fans (32) fixedly connected to the top of the cooling chamber (31) along the conveying direction for blowing air onto the welded valve body (91) to reduce the temperature of the valve body (91).

5. The automatic assembly and welding device for an automotive air conditioning electronic expansion valve according to claim 1, characterized in that, The refrigerant automatic filling assembly (4) includes a fixed filling seat (41) and a filling lifting cylinder (42) fixedly connected to the filling seat (41) in the vertical direction. The lifting end of the filling lifting cylinder (42) is fixedly connected to a filling pipe (43) for filling refrigerant into the valve body (91).

6. The automatic assembly and welding device for an automotive air conditioning electronic expansion valve according to claim 1, characterized in that, The valve body transfer assembly (5) includes a transfer sliding seat (51) fixedly arranged along the conveying direction perpendicular to the double-layer conveyor line (1) and at least two sets of sliding mounting seats (52) slidably connected to the transfer sliding seat (51). The sliding mounting seat (52) is slidably connected to a lifting transfer seat (54) in the vertical direction based on the transfer lifting cylinder (53). At least one first vacuum nozzle (55) for sucking the valve body (91) out of the valve body positioning tray (214) is fixedly connected to the lifting transfer seat (54). The transfer sliding seat (51) is provided with a sliding drive assembly (56) for driving the sliding mounting seat (52) to slide.

7. The automatic assembly and welding device for an automotive air conditioning electronic expansion valve according to claim 6, characterized in that, The sliding drive assembly (56) includes a drive rack (561) fixedly connected to the transfer sliding seat (51) along the conveying direction perpendicular to the double-layer conveyor line (1), a drive gear (562) rotatably connected to the sliding mounting seat (52) and meshing with the drive rack (561), and a sliding drive motor (563) fixedly connected to the sliding mounting seat (52) to drive the drive gear (562) to rotate.

8. The automatic assembly and welding device for an automotive air conditioning electronic expansion valve according to claim 1, characterized in that, The sealing cover feeding assembly (6) includes an assembly base (61) and a vibrating feeder feeding line (62) fixedly connected to the assembly base (61) for feeding the sealing cover (92) and a valve body feeding line (63) for feeding the valve body (91). A valve body positioning assembly base (64) is fixedly connected between the assembly base (61) and the vibrating feeder feeding line (62) and the valve body feeding line (63). A horizontal sliding seat (66) is also slidably connected to the assembly base (61) based on a fourth horizontal screw slide (65). The horizontal sliding seat (66) is slidably connected along the vertical direction. A vertical adsorption seat (67) and a vertical clamping seat (68) are slidably connected in opposite directions. A second vacuum nozzle (69) for adsorbing the valve body (91) and a sealing cover clamping cylinder (610) for clamping the sealing cover (92) are fixedly connected to the vertical adsorption seat (67) and the vertical clamping seat (68), respectively. A clamping claw (611) is fixedly connected to the clamping end of the sealing cover clamping cylinder (610). A fourth lifting cylinder (612) is fixedly connected to the horizontal sliding seat (66) to drive the vertical adsorption seat (67) and the vertical clamping seat (68) to rise and fall.

9. The automatic assembly and welding device for an automotive air conditioning electronic expansion valve according to claim 1, characterized in that, The closed-cover energy storage welding assembly (7) includes a lower welding seat (72) that is movably arranged in the vertical direction based on a lifting cylinder (71) and an upper welding seat (74) that is movably arranged in the vertical direction based on a pressing cylinder (73). A transformer (75) for providing voltage transformation for the energy storage welding process is fixedly connected to the lower welding seat (72) and the upper welding seat (74). A vent hole (76) is provided on the lower welding seat (72).

10. The automatic assembly and welding device for an automotive air conditioning electronic expansion valve according to claim 1, characterized in that, The double-layer conveyor line (1) is fixedly connected at both ends in the vertical direction to a lifting conveyor assembly (10) for lifting the valve body positioning tray (214). The lifting conveyor assembly (10) includes a fixedly installed lifting conveyor seat (101) and a lifting conveyor belt (102) slidably connected to the lifting conveyor seat (101) in the vertical direction. A lifting conveyor cylinder (103) for driving the lifting conveyor belt (102) to lift is fixedly connected to the lifting conveyor seat (101) in the vertical direction.

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