Welding tool for automobile air conditioner pipe fitting and welding method of welding tool

Abstract

The invention discloses an automobile air conditioner pipe fitting welding tool and a welding method thereof, and relates to the technical field of air conditioner pipe fitting machining, the automobile air conditioner pipe fitting welding tool comprises a base, a supporting frame is fixedly connected to one side of the base, and a welding table is arranged at the top of the supporting frame. According to the device, the guide part is in threaded connection with the lead screw, the guide part is fixedly connected with the first placement part, and when the lead screw is driven by the motor to rotate, the guide part moves along the second auxiliary part, the first placement part is driven to slide on the top of the second auxiliary part, and the positions of the first placement part and the pipe fitting are changed; position calibration of the pipe fitting is achieved, the limiting strip and the limiting rod can limit connection of the first placing piece and the second placing piece, movement of the first placing piece is reduced, therefore, position deviation during pipe fitting welding can be reduced, the difficulty during alignment of the end faces of the pipe fitting is lowered, manual step-by-step adjustment is not needed, the manual labor amount can be reduced, and welding time consumption is shortened.

Description

Technical Field

[0001] The invention relates to the technical field of air-conditioning pipe processing, in particular to a welding tool for automobile air-conditioning pipes and a welding method thereof. Background Art

[0002] Pipes refer to the pipes that transmit working fluids in hydraulic systems. Automobile air conditioning pipes are usually composed of aluminum pipes, air conditioning hoses and other pipe accessories. Since the various parts of automobile air conditioning are generally installed in various parts of the car, automobile air conditioning pipes are like blood vessels in the human body, responsible for connecting these scattered parts, so that a complete automobile air conditioning system can work in an orderly manner.

[0003] For example, Chinese patent CN214921977U discloses an efficient welding tool that can weld multiple automobile air-conditioning pipes at the same time, including a frame, a workbench, a rotating assembly and at least one group of welding assemblies. The workbench is rotatably connected to the frame, and the rotating assembly is arranged on the frame and can make the workbench rotate; the welding assembly includes a welding seat and a positioning section, the welding seat is detachably connected to the workbench, and a positioning groove for embedding a fixing ear piece is provided on the top wall of the welding seat, and the positioning section is detachably connected to the workbench and is used to support the through pipe.

[0004] In the above patent, although the problem of low efficiency in fixing and disassembling the various parts of the pipe fittings is solved by welding seats and positioning sections, the two groups of pipe fittings need to be aligned before welding. Some pipe fittings are curved in shape, and it is difficult to align the end faces of the pipe fittings manually. Position deviation is prone to occur, and gradual adjustment is required, which increases the manual labor and welding time. Summary of the invention

[0005] The purpose of the present invention is to provide a welding tool and a welding method for automobile air-conditioning pipe fittings, so as to solve the problem that the two groups of pipe fittings proposed in the above-mentioned background technology need to be aligned before welding, some pipe fittings are curved in shape, it is difficult to align the end faces of the pipe fittings manually, and position deviation is prone to occur, which requires gradual adjustment, increasing the manual labor and welding time.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a welding tool for automobile air-conditioning pipe fittings, comprising a base, one side of the base is fixedly connected to a support frame, the top of the support frame is provided with a welding platform, the top of the welding platform is provided with a position calibration mechanism, the position calibration mechanism comprises a placement piece 1, a placement piece 2 and a motor, one side of the placement piece 2 is fixedly connected to the welding platform, one side of the welding platform is slidably connected to an auxiliary piece 2, one side of the inner wall of the auxiliary piece 2 is slidably connected to a guide piece, one side of the guide piece is fixedly connected to the placement piece 1, the guide piece is connected to a lead screw through a thread, one end of the lead screw is rotatably connected to the auxiliary piece 2, and the other end is fixedly connected to the output shaft of the motor, one side of the motor is slidably connected to the welding platform, one side of the motor is fixedly connected to the auxiliary piece 2, one side of the auxiliary piece 2 is slidably connected to the placement piece 1, one side of the placement piece 1 is fixedly connected to a hydraulic push rod 1, the outer ring surface of the hydraulic push rod 1 is fixedly connected to the auxiliary piece 1, and one side of the auxiliary piece 1 is slidably connected to the welding platform.

[0007] Preferably, one side of the placing member 1 and the placing member 2 are both fixedly connected with a transverse axis, one end of one of the transverse axes is fixedly connected with a limiting rod, and one end of the limiting rod is plugged into the other transverse axis.

[0008] Preferably, a limiting strip is inserted into one side of the placing piece one, and one end of the limiting strip is fixedly connected to the placing piece two.

[0009] Preferably, a limiting mechanism is provided on one side of the welding table, and the limiting mechanism includes a limiting plate 1, a guide plate and a threaded rod, one side of the guide plate is fixedly connected to the placement piece 1 and the placement piece 2 respectively, and the guide plate is rotationally connected to the threaded rod.

[0010] Preferably, the threaded rod is connected to the second limiting plate via a threaded connection, one side of the second limiting plate is fixedly connected to the first limiting plate, and one side of both the first limiting plate and the second limiting plate is provided with an arc groove.

[0011] Preferably, there are two groups of limit plates 1 and 2, one side of the limit plates 1 and 2 in one group overlaps with the placement piece 2, and the other side of the limit plates 1 and 2 in the other group overlaps with the placement piece 1.

[0012] Preferably, one side of the welding platform is connected to a connecting plate by bolts, one side of the connecting plate is fixedly connected to a reinforcing strip, and one side of the reinforcing strip is fixedly connected to an auxiliary frame.

[0013] Preferably, one side of the auxiliary frame is rotatably connected to the supporting frame, and the other side of the auxiliary frame passes through the supporting frame and is fixedly connected to a gear, and the gear is rotatably connected to the supporting frame.

[0014] Preferably, a rack is meshed at the bottom of the gear, a guide rail is slidably connected to the bottom of the rack, one side of the guide rail is fixedly connected to the support frame, and one side of the guide rail is fixedly connected to a fixing piece, two hydraulic push rods are inserted through the inside of the fixing piece, one end of the two hydraulic push rods is fixedly connected to a connecting piece, one side of the connecting piece is fixedly connected to the rack, and the connecting piece and the guide rail are slidably connected.

[0015] A welding method for a welding tool for automobile air-conditioning pipe fittings comprises the following steps: S1. Place the air conditioning pipe fittings on the placement piece 1 and the placement piece 2 in sequence, and use the arc grooves at the bottom of the limiting plate 1 and the limiting plate 2 to press and limit the pipe fittings; S2. Use the motor to drive the lead screw to rotate, and the guide member drives the placement member 1 to slide on the top of the welding table to achieve the front and rear calibration of the placement member 1. Then use the hydraulic push rod 1 to drive the placement member 1 to move to the right until the limit rod is inserted into the right horizontal axis, and the left end of the limit bar is plugged into the placement member 1, and the two pipes are aligned to complete the overall calibration of the pipe; S3. After calibration, the overlapping parts of the two pipes are welded by welding equipment. After welding, the rack is driven to move by hydraulic push rod 2, and the gear is driven to rotate. At this time, the welding table and the connecting plate are rotated 90° with the center of the gear to place the pipe vertically. At this time, the connection parts of the pipes are welded again. S4. After welding is completed, the rack moves in the reverse direction to drive the gear to rotate in the reverse direction, the welding table and the connecting plate are reset, and then the welded pipe fittings can be removed from the top of the welding table.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, the guide member is connected to the lead screw by a threaded connection, and the guide member is fixedly connected to the placement member 1. When the lead screw is driven to rotate by a motor, the guide member moves along the auxiliary member 2, driving the placement member 1 to slide on the top of the auxiliary member 2, changing the positions of the placement member 1 and the pipe fitting, and driving the placement member 1 to move to the right by a hydraulic push rod 1 to achieve position calibration of the pipe fitting. The limit bar and the limit rod can limit the connection between the placement member 1 and the placement member 2, reducing the movement of the placement member 1, thereby reducing the position offset during pipe fitting welding and reducing the difficulty of aligning the end faces of the pipe fittings. No manual step-by-step adjustment is required, which can reduce manual labor and shorten welding time.

[0017] 2. In the present invention, the guide plate is slidably connected to the limit plate 2, and the limit plate 2 is threadedly connected to the threaded rod. The threaded rod is rotated to drive the limit plate 2 to move downward inside the guide plate until the limit plate 2 and the bottom of the limit plate 1 are engaged with the pipe fitting, thereby limiting the position of the pipe fitting and reducing the looseness of the pipe fitting after placement, thereby achieving the synchronous movement of the subsequent pipe fitting with the placement piece 1, and improving the stability of the pipe fitting during welding.

[0018] 3. In the present invention, the auxiliary frame is rotatably connected to the support frame, and the rack is meshingly connected to the gear. When the hydraulic push rod is used to drive the connecting piece to move, the rack slides along the guide rail, thereby driving the gear to rotate. The gear drives the auxiliary frame and the connecting plate to rotate, and the welding table is turned over. The welding direction and position of the pipe fitting can be changed by turning over the welding table, thereby increasing the welding area at the connection of the pipe fitting, improving the stability of the welding, and ensuring the welding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of a welding tool for automobile air-conditioning pipe fittings of the present invention; Figure 2 This is a schematic diagram of the installation of a gear structure of a welding tool for automobile air-conditioning pipe fittings of the present invention; Figure 3 This is a schematic diagram of the installation of a connecting plate structure of a welding tool for automobile air-conditioning pipe fittings of the present invention; Figure 4 This is a schematic diagram of the structural installation of a hydraulic push rod and an auxiliary component of a welding tool for automobile air-conditioning pipe fittings of the present invention; Figure 5 It is a schematic diagram of the structural connection between the first and second limit plates of a welding tool for automobile air-conditioning pipe fittings of the present invention; Figure 6 It is a schematic diagram of the installation of a limit rod structure of a welding tool for automobile air-conditioning pipe fittings of the present invention; Figure 7 The present invention is a schematic diagram of the installation of a lead screw structure of a welding tool for automobile air-conditioning pipe fittings.

[0020] In the figure: 1. Welding table; 11. Hydraulic push rod 1; 12. Auxiliary part 1; 13. Placement part 1; 131. Auxiliary part 2; 14. Limiting strip; 15. Placement part 2; 16. Limiting mechanism; 161. Limiting plate 1; 162. Limiting plate 2; 163. Guide plate; 164. Threaded rod; 17. Motor; 171. Lead screw; 172. Guide part; 18. Limiting rod; 19. Horizontal axis; 2. Support frame; 21. Auxiliary frame; 22. Reinforcement strip; 23. Connecting plate; 3. Base; 4. Guide rail; 5. Hydraulic push rod 2; 51. Connecting part; 52. Gear; 6. Fixing part; 7. Rack. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Example 1: Reference Figure 1-Figure 7 As shown: a welding tool for automobile air-conditioning pipe fittings, including a base 3, one side of the base 3 is fixedly connected to a support frame 2, a welding platform 1 is arranged on the top of the support frame 2, and a position calibration mechanism is arranged on the top of the welding platform 1, the position calibration mechanism includes a placement piece 13, a placement piece 2 15 and a motor 17, one side of the placement piece 2 15 is fixedly connected to the welding platform 1, one side of the welding platform 1 is slidably connected to an auxiliary piece 2 131, one side of the inner wall of the auxiliary piece 2 131 is slidably connected to a guide piece 172, one side of the guide piece 172 is fixedly connected to the placement piece 13, the guide piece 172 is connected to a lead screw 171 through a thread, one end of the lead screw 171 is rotatably connected to the auxiliary piece 2 131, and the other end is connected to the output of the motor 17 The shaft is fixedly connected, one side of the motor 17 is slidably connected to the welding table 1, one side of the motor 17 is fixedly connected to the auxiliary part 2 131, one side of the auxiliary part 2 131 is slidably connected to the placement part 13, one side of the placement part 13 is fixedly connected with a hydraulic push rod 11, and the outer ring surface of the hydraulic push rod 11 is fixedly connected with an auxiliary part 12, one side of the auxiliary part 12 is slidably connected to the welding table 1, and one side of the placement part 13 and the placement part 2 15 are both fixedly connected with a transverse axis 19, one end of one of the transverse axes 19 is fixedly connected to a limiting rod 18, and one end of the limiting rod 18 is plugged into the other transverse axis 19, and a limiting strip 14 is inserted on one side of the placement part 13, and one end of the limiting strip 14 is fixedly connected to the placement part 2 15.

[0023] In this embodiment, an initial reference position can be set by placing piece 15, and the sliding connection between auxiliary piece 131 and welding table 1 can be used to assist the adjustment of auxiliary piece 131 in the horizontal direction of the top of welding table 1. The auxiliary piece 131 can be used to guide the movement of guide piece 172, so that the guide piece 172 can drive the movement adjustment of placing piece 13 on the top of auxiliary piece 131, thereby reducing the mutual interference between placing piece 13 and auxiliary piece 131. Auxiliary piece 131 can be used to reinforce one side of motor 17, so that motor 17 can drive lead screw 171 to rotate stably. The sliding connection between auxiliary piece 12 and welding table 1 can be used to guide the movement of hydraulic push rod 11, so that the hydraulic push rod 11 can move along with placing piece 13 in the front and rear direction of welding table 1. One side of auxiliary piece 12 is connected to placing piece 13. The auxiliary part 12 and the pipe fitting are slidably connected, so when the placement part 13 moves in the horizontal direction, the connection between the auxiliary part 12 and the placement part 13 can always be maintained, and the hydraulic push rod 11 can provide power for the horizontal movement of the placement part 13. Since the guide part 172 is slidably connected to the inner wall of the lead screw 171, when the placement part 13 is subjected to a force, the guide part 172 moves to the right with the placement part 13, and the auxiliary part 131 can be driven to move to the right. At this time, the bottom of the auxiliary part 131 moves to the right along the welding table 1, so as to realize the centralized movement of the placement part 13, the auxiliary part 131 and the pipe fitting, and avoid the auxiliary part 131 from interfering with the movement of the guide part 172. The position of the placement part 13 on the side of the placement part 15 can be limited by the limit bar 14 and the limit rod 18, so as to reduce the position error when the pipe fitting is aligned.

[0024] Embodiment 2: According to Figure 1-Figure 6 As shown, a limiting mechanism 16 is arranged on one side of the welding table 1, and the limiting mechanism 16 includes a limiting plate 161, a guide plate 163 and a threaded rod 164, one side of the guide plate 163 is respectively fixedly connected to the placement piece 13 and the placement piece 2 15, the guide plate 163 is rotatably connected to the threaded rod 164, the threaded rod 164 is threadedly connected to the limiting plate 2 162, one side of the limiting plate 2 162 is fixedly connected to the limiting plate 1 161, one side of the limiting plate 1 161 and the limiting plate 2 162 are provided with arc grooves, and there are two groups of limiting plates 1 161 and 162, one group of which has one side of the limiting plate 1 161 and the limiting plate 2 162 overlapped with the placement piece 2 15, and the other group of which has one side of the limiting plate 1 161 and the limiting plate 2 162 overlapped with the placement piece 13.

[0025] One side of the welding table 1 is connected to a connecting plate 23 by bolts, one side of the connecting plate 23 is fixedly connected to a reinforcement strip 22, one side of the reinforcement strip 22 is fixedly connected to an auxiliary frame 21, one side of the auxiliary frame 21 is rotatably connected to the support frame 2, the other side of the auxiliary frame 21 passes through the support frame 2 and is fixedly connected to a gear 52, the gear 52 is rotatably connected to the support frame 2, a rack 7 is meshed at the bottom of the gear 52, a guide rail 4 is slidably connected to the bottom of the rack 7, one side of the guide rail 4 is fixedly connected to the support frame 2, and one side of the guide rail 4 is fixedly connected to a fixing member 6, a hydraulic push rod 2 5 is inserted through the inside of the fixing member 6, one end of the hydraulic push rod 2 5 is fixedly connected to a connecting member 51, one side of the connecting member 51 is fixedly connected to the rack 7, and the connecting member 51 is slidably connected to the guide rail 4.

[0026] In this embodiment, the limiting plate 162 can be used to connect the limiting plates 161 on both sides, so as to achieve the synchronous lifting of the limiting plates 161 and the limiting plates 162. The guide plate 163 can guide the lifting of the limiting plate 162. The threaded rod 164 can provide power for the lifting of the limiting plate 162, so as to adjust the use height of the limiting plate 162. The limiting plates 161 and the limiting plates 162 can be used to limit and fix the pipe fittings, so that the pipe fittings can be stably placed on the placing piece 13 and the placing piece 2 15, respectively, and can be subsequently turned over and adjusted with the placing piece 13 and the placing piece 2 15. At the same time, the connection between the connecting plate 23 and the welding table 1 can be achieved by bolts, the connecting plate 23 can be used to support the bottom of the reinforcement strip 22, and the two ends of the reinforcement strip 22 are fixedly connected to the auxiliary frame 21, so that the connection between the auxiliary frame 21 and the connecting plate 23 is achieved through the reinforcement strip 22, the support frame 2 can be used to support the rotation of the auxiliary frame 21, thereby improving the stability of the auxiliary frame 21 and the welding table 1 during rotation, and the connection between the auxiliary frame 21 and the gear 52 can achieve synchronous rotation of the gear 52 and the auxiliary frame 21, the support frame 2 can be used to support one side of the gear 52, thereby improving the stability of the gear 52 during rotation, the support frame 2 can also be used to support one side of the guide rail 4, and the guide rail 4 is supported on one side of the fixing part 6, which is convenient for the stable installation and use of the hydraulic push rod 2 5 on one side of the guide rail 4, and the hydraulic push rod 2 5 can be used as a power source to drive the rack 7 to move, thereby driving the gear 52 to rotate, thereby achieving stable flipping of the welding table 1 and the connecting plate 23, and the base 3 supports the bottom of the entire device during flipping.

[0027] Embodiment 3: A welding method of a welding tool for automobile air-conditioning pipe fittings, comprising the following steps: Step 1: Place the air conditioning pipe fittings on the placement piece 13 and the placement piece 2 15 in sequence, and use the arc grooves at the bottom of the limiting plate 1 161 and the limiting plate 2 162 to press and limit the pipe fittings; Step 2: Use the motor 17 to drive the lead screw 171 to rotate, and the guide member 172 drives the placement member 13 to slide on the top of the welding table 1 to achieve the front and rear calibration of the placement member 13, and then use the hydraulic push rod 11 to drive the placement member 13 to move to the right until the limit rod 18 is inserted into the right side of the horizontal axis 19, and the left end of the limit bar 14 is plugged into the placement member 13, and the two pipes are aligned to complete the overall calibration of the pipe; Step 3: After calibration, use the welding equipment to weld the overlapped parts of the two pipes. After welding, use the hydraulic push rod 2 5 to drive the rack 7 to move and drive the gear 52 to rotate. At this time, the welding table 1 and the connecting plate 23 rotate 90° with the center of the gear 52 to place the pipes vertically. At this time, continue to weld the pipe joints. Step 4: After welding is completed, the rack 7 moves in the reverse direction to drive the gear 52 to rotate in the reverse direction, the welding table 1 and the connecting plate 23 are reset, and then the welded pipe fitting can be removed from the top of the welding table 1.

[0028] The welding method and working principle of the device are as follows: first, two automobile air-conditioning pipes to be welded are placed on the placement piece 13 and the placement piece 2 15 respectively, and the threaded rod 164 is rotated on the top of the guide plate 163 to drive the limit plate 2 162 to move down along the guide plate 163, and the limit plate 1 161 and the limit plate 2 162 are moved down synchronously to press and fix the pipes to achieve the initial limit of the pipes, and then the motor 17 is used to drive the lead screw 171 to rotate, and the guide piece 172 moves along the auxiliary piece 2 131 under the action of the thread, and the placement piece 13 is moved back and forth on the top of the welding table 1 until the pipes are pressed and fixed. Until one side of the placement piece 13 overlaps with the limit bar 14, and then the hydraulic push rod 11 is used to drive the placement piece 13 to move to the side close to the placement piece 2 15, and the guide piece 172 moves with the placement piece 13, exerting a force to move rightward on the auxiliary piece 2 131, and the auxiliary piece 2 131 moves horizontally along the welding table 1 under the force, and the motor 17 moves with the auxiliary piece 2 131 until the right end of the limit rod 18 is plugged into the horizontal axis 19, and the left end of the limit bar 14 is inserted into the placement piece 13, completing the position calibration of the placement piece 13 and the placement piece 2 15, and realizing the alignment of the two pipe fittings; At this time, the top of the pipe fitting can be welded. Anhui uses hydraulic push rod 25 to drive the connecting piece 51 to slide along the guide rail 4. The connecting piece 51 drives the rack 7 to move, and the rack 7 drives the gear 52 to rotate. The auxiliary frame 21 and the reinforcement bar 22 rotate between the two support frames 2. The reinforcement bar 22 drives the connecting plate 23 and the welding table 1 to rotate synchronously. The welding table 1 is flipped 90°, and the pipe fitting can be welded again to increase the welding area of ​​the pipe fitting and complete the overall welding of the pipe fitting.

[0029] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A welding tool for automobile air-conditioning pipe fittings, comprising a base (3), one side of the base (3) being fixedly connected to a support frame (2), characterized in that: A welding table (1) is arranged on the top of the support frame (2), and a position calibration mechanism is arranged on the top of the welding table (1), wherein the position calibration mechanism comprises a placement piece 1 (13), a placement piece 2 (15) and a motor (17), wherein one side of the placement piece 2 (15) is fixedly connected to the welding table (1), one side of the welding table (1) is slidably connected to an auxiliary piece 2 (131), one side of the inner wall of the auxiliary piece 2 (131) is slidably connected to a guide piece (172), one side of the guide piece (172) is fixedly connected to the placement piece 1 (13), and the guide piece (172) is threadedly connected to a lead screw (171). One end of the lead screw (171) is rotatably connected to auxiliary component 2 (131), and the other end is fixedly connected to the output shaft of the motor (17); one side of the motor (17) is slidably connected to the welding table (1); one side of the motor (17) is fixedly connected to auxiliary component 2 (131); one side of the auxiliary component 2 (131) is slidably connected to placement component 1 (13); one side of the placement component 1 (13) is fixedly connected to hydraulic push rod 1 (11); the outer ring surface of the hydraulic push rod 1 (11) is fixedly connected to auxiliary component 1 (12); one side of the auxiliary component 1 (12) is slidably connected to the welding table (1).

2. The welding tool for automobile air-conditioning pipe fittings according to claim 1 is characterized in that: One side of the placement piece 1 (13) and the placement piece 2 (15) are both fixedly connected to a transverse axis (19), one end of one of the transverse axes (19) is fixedly connected to a limiting rod (18), and one end of the limiting rod (18) is plugged into the other transverse axis (19).

3. The welding tool for automobile air-conditioning pipe fittings according to claim 1 is characterized in that: A limiting strip (14) is inserted into one side of the first placement piece (13), and one end of the limiting strip (14) is fixedly connected to the second placement piece (15).

4. The welding tool for automobile air-conditioning pipe fittings according to claim 1 is characterized in that: A limiting mechanism (16) is provided on one side of the welding table (1), the limiting mechanism (16) comprising a limiting plate 1 (161), a guide plate (163) and a threaded rod (164), one side of the guide plate (163) being fixedly connected to a placing piece 1 (13) and a placing piece 2 (15) respectively, and the guide plate (163) and the threaded rod (164) are rotatably connected.

5. The welding tool for automobile air-conditioning pipe fittings according to claim 4 is characterized in that: The threaded rod (164) is connected to the second limiting plate (162) via a threaded connection, one side of the second limiting plate (162) is fixedly connected to the first limiting plate (161), and one side of both the first limiting plate (161) and the second limiting plate (162) is provided with an arc groove.

6. The welding tool for automobile air-conditioning pipes according to claim 5 is characterized in that: There are two groups of the limiting plate 1 (161) and the limiting plate 2 (162), one group of which has one side of the limiting plate 1 (161) and the limiting plate 2 (162) overlapped with the placement piece 2 (15), and the other group of which has one side of the limiting plate 1 (161) and the limiting plate 2 (162) overlapped with the placement piece 1 (13).

7. The welding tool for automobile air-conditioning pipe fittings according to claim 1 is characterized in that: One side of the welding platform (1) is connected to a connecting plate (23) via bolts, one side of the connecting plate (23) is fixedly connected to a reinforcing strip (22), and one side of the reinforcing strip (22) is fixedly connected to an auxiliary frame (21).

8. The welding tool for automobile air-conditioning pipe fittings according to claim 7 is characterized in that: One side of the auxiliary frame (21) is rotatably connected to the support frame (2), and the other side of the auxiliary frame (21) passes through the support frame (2) and is fixedly connected to a gear (52), and the gear (52) is rotatably connected to the support frame (2).

9. The welding tool for automobile air-conditioning pipe fittings according to claim 8, characterized in that: A rack (7) is meshed at the bottom of the gear (52), and a guide rail (4) is slidably connected to the bottom of the rack (7), one side of the guide rail (4) is fixedly connected to the support frame (2), and one side of the guide rail (4) is fixedly connected to a fixing member (6), a second hydraulic push rod (5) is inserted through the inside of the fixing member (6), one end of the second hydraulic push rod (5) is fixedly connected to a connecting member (51), one side of the connecting member (51) is fixedly connected to the rack (7), and the connecting member (51) and the guide rail (4) are slidably connected.

10. A welding method for a welding tool for automobile air-conditioning pipe fittings, characterized in that: A welding tool for automobile air-conditioning pipe fittings using any one of claims 1 to 9 comprises the following steps: S1. Place the air conditioning pipe fittings on the placement piece 1 (13) and the placement piece 2 (15) in sequence, and use the arc grooves at the bottom of the limiting plate 1 (161) and the limiting plate 2 (162) to press and limit the pipe fittings; S2, using the motor (17) to drive the lead screw (171) to rotate, and the guide member (172) to drive the placement member (13) to slide on the top of the welding table (1), so as to achieve the front and rear calibration of the placement member (13), and then using the hydraulic push rod (11) to drive the placement member (13) to move to the right until the limit rod (18) is inserted into the right side horizontal axis (19), the left end of the limit bar (14) is plugged into the placement member (13), the two pipes are aligned, and the overall calibration of the pipe is completed; S3. After calibration, the overlapping parts of the two pipes are welded using the welding equipment. After welding, the rack (7) is driven to move by the hydraulic push rod (5) to drive the gear (52) to rotate. At this time, the welding table (1) and the connecting plate (23) are rotated 90 degrees with the center of the gear (52) so that the pipes are placed vertically. At this time, the connection parts of the pipes are welded again. S4. After welding is completed, the rack (7) moves in the reverse direction to drive the gear (52) to rotate in the reverse direction, and the welding table (1) and the connecting plate (23) are reset. Then, the welded pipe fitting can be removed from the top of the welding table (1).

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