Automobile air conditioner pipeline welding tool

Abstract

The utility model relates to the technical field of automobile air conditioner pipeline production and manufacturing, in particular to an automobile air conditioner pipeline welding tool which comprises a supporting base and a positioning seat arranged on the supporting base, the positioning seat is used for supporting a pipeline pressing plate, and an anti-blocking piece for preventing welding blocking is arranged on the positioning seat. The supporting base is further provided with a limiting assembly used for limiting the air conditioner pipe. The pipeline pressing plate is placed on the positioning seat, the air conditioner pipe is inserted into the pipeline pressing plate, meanwhile, the probability of welding blockage in the welding process is reduced through the anti-blocking piece, so that the welding quality of the air conditioner pipe and the pipeline pressing plate is improved, meanwhile, the air conditioner pipe is limited through the limiting assembly, the probability of position deviation of the air conditioner pipe in the welding process is reduced, and the welding quality is improved. Therefore, the accuracy of the welding angle is improved, the welding quality of the automobile air conditioner pipeline is improved, the rework amount and the scrap amount of products are reduced, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile air-conditioning pipeline production and manufacturing, in particular to an automobile air-conditioning pipeline welding tool. Background Art

[0002] There are many complex piping structures in the automotive air-conditioning system, and the connections between different pipes have different performance requirements. At present, in addition to the end face processing and forming, most of the pipe end structures of the air-conditioning pipes also require welded pipe end structures, such as welded joints, welded external threaded connections, welded pipe pressure plates, etc. The welded pipe end structure has greater flexibility and can be precisely configured according to different air-conditioning interfaces, especially some unconventional air-conditioning interfaces.

[0003] In the related art, reference can be made to the Chinese utility model patent with authorization announcement number CN216242883U, which discloses an automobile air-conditioning pipe pressure plate structure, including a base plate, a second opening is provided in the base plate, a second connecting pipe is connected to the upper surface of the base plate, the inner surface of the second connecting pipe is provided with a groove, a first connecting pipe is connected to the lower surface of the base plate, a vent is provided on the right surface of the groove, and the vent extends to the outside of the second connecting pipe; the pipeline is extended into the second connecting pipe for welding, and the welded pipeline and the base plate are connected to other components through the first connecting pipe.

[0004] When welding small pipelines with a diameter of less than φ9 for automotive air conditioners, weld nodules often appear inside the pipeline pressure plate head, blocking the inner hole of the pipeline or reducing the welding aperture, which affects the refrigerant flow rate during the operation of the air conditioner, and ultimately affects the reduction in cooling capacity and poor air conditioning effect. In addition, in order to increase the life of the pipeline, reduce weight and reduce cost, the current automotive air conditioning pipeline material is often made of aluminum alloy. In addition, the layout direction of the pipeline on the vehicle is three-dimensional and changeable, which requires that the process in the production process must control the various direction angles of the aluminum alloy pipe. If the manufacturing welding angle error is too large, it will inevitably affect the smooth installation, thereby reducing the welding quality of the automotive air conditioning pipeline and increasing the rework and scrap volume of the product. Utility Model Content

[0005] In order to improve the welding quality of automobile air-conditioning pipelines, the utility model provides an automobile air-conditioning pipeline welding tool.

[0006] The present application provides an automobile air conditioning pipeline welding tool, which adopts the following technical solution:

[0007] A welding tool for automobile air-conditioning pipelines comprises a supporting base and a positioning seat arranged on the supporting base, wherein the positioning seat is used to support a pipeline pressure plate, the positioning seat is provided with an anti-blocking piece to prevent welding blockage, and the supporting base is also provided with a limiting assembly for limiting the air-conditioning pipe.

[0008] By adopting the above technical scheme, the pipeline pressure plate is placed on the positioning seat, and the air-conditioning pipe is inserted into the pipeline pressure plate. At the same time, the anti-blocking parts reduce the probability of welding blockage during welding, thereby improving the welding quality of the air-conditioning pipe and the pipeline pressure plate. At the same time, the air-conditioning pipe is limited by the limiting component to reduce the probability of the position of the air-conditioning pipe being offset during welding, thereby improving the accuracy of the welding angle, thereby improving the welding quality of the automobile air-conditioning pipe, reducing the amount of rework and scrap of the product, and thereby reducing the production cost.

[0009] Optionally, the pipeline pressure plate includes a pressure plate body and a connecting pipe arranged on one side of the pressure plate body, the connecting pipe has a through hole that passes through the pressure plate body, the other side of the pressure plate body has a welding hole for inserting an air-conditioning pipe, the welding hole is connected to the through hole, and the positioning seat is provided with a positioning hole for positioning the connecting pipe, and the anti-blocking part is arranged in the positioning hole.

[0010] By adopting the above technical solution, the connecting pipe is inserted into the positioning hole, the pressure plate body is abutted against the positioning seat, the air-conditioning pipe is inserted into the welding hole for welding, and the anti-blocking part prevents the through hole and the air-conditioning pipe from being blocked, thereby realizing the positioning of the pipeline pressure plate during the welding process, reducing the probability of deviation in the welding angle caused by offset of the pipeline pressure plate during welding, thereby improving the welding quality of automobile air-conditioning pipes.

[0011] Optionally, the anti-blocking member is an anti-blocking pin, which is coaxially fixed in the positioning hole and passes through the through hole and the welding hole in sequence. During welding, the anti-blocking pin extends into the air-conditioning pipe.

[0012] By adopting the above technical solution, the connecting pipe is inserted into the positioning hole, and the anti-blocking pin passes through the through hole, and then the air-conditioning pipe is inserted into the welding hole. At this time, the anti-blocking pin extends into the air-conditioning pipe, thereby achieving anti-blocking during the welding process and reducing the probability of the weld nodule blocking the through hole, thereby improving the welding quality of the automobile air-conditioning pipeline.

[0013] Optionally, the inner diameters of the air-conditioning pipe and the connecting pipe are both larger than the outer diameter of the anti-blocking pin, the inner diameter of the welding hole is larger than the outer diameter of the air-conditioning pipe and larger than the inner diameter of the connecting pipe, the outer diameter of the air-conditioning pipe is larger than the inner diameter of the connecting pipe, and the inner diameter of the positioning hole is larger than the outer diameter of the connecting pipe.

[0014] By adopting the above technical scheme, when the air-conditioning pipe is inserted into the welding hole, the bottom end of the air-conditioning pipe contacts the bottom wall of the welding hole and is located above the through hole, thereby reducing the probability of solder in the welding hole flowing into the through hole. The inner diameters of the air-conditioning pipe and the connecting pipe are both larger than the outer diameter of the anti-blocking pin, thereby reducing the probability that the pipeline pressure plate cannot be removed after the anti-blocking pin breaks or expands at high temperature, thereby reducing the scrap rate in the welding process. The inner diameter of the positioning hole is larger than the outer diameter of the connecting pipe, thereby improving the convenience of the connecting pipe being separated from the positioning hole after welding, and improving the convenience of removing parts after welding while achieving anti-blocking.

[0015] Optionally, a limiting pin is provided on one side of the positioning seat having a positioning hole, and a limiting hole is provided on the pressure plate body. When the connecting pipe is located in the positioning hole, the limiting pin is inserted in the limiting hole to limit the pressure plate body.

[0016] By adopting the above technical solution, the connecting pipe is inserted into the positioning hole, the limiting pin is inserted into the limiting hole, and the positioning hole and the limiting pin cooperate to position the two ends of the pipeline pressure plate, thereby improving the stability of the pipeline pressure plate during the welding process, thereby reducing the probability of deviation in the welding angle caused by offset during the welding process of the pipeline pressure plate, thereby improving the welding quality of the automobile air-conditioning pipeline.

[0017] Optionally, the limiting component includes:

[0018] A first support rod, wherein the first support rod is arranged on the support base, the first support rod is provided with a first limit block for limiting the position of the air conditioning pipe, and the first limit block is provided with a first guide groove along the length direction;

[0019] A second support rod, the second support rod is arranged on the first support rod, the second support rod is provided with a second limiting block for limiting the air conditioning pipe, and the second limiting block is provided with a second guide groove along the length direction;

[0020] The first guide groove and the second guide groove extend along the length direction of the air conditioning pipe. When the air conditioning pipe is inserted into the welding hole, the air conditioning pipe is positioned in the first guide groove and the second guide groove.

[0021] By adopting the above technical solution, after the pipeline pressure plate is installed, the air-conditioning pipe is inserted into the welding hole, and at the same time, the end of the air-conditioning pipe away from the positioning seat is placed in the first guide groove and the second guide groove for positioning, and the air-conditioning pipe is limited by the welding hole, the first guide groove and the second guide groove, so as to improve the stability of the air-conditioning pipe during the welding process, reduce the probability of deviation in the welding angle due to the displacement of the position of the air-conditioning pipe during welding, thereby improving the welding quality of automobile air-conditioning pipes.

[0022] Optionally, the depth and width of the first guide groove and the second guide groove are both greater than the outer diameter of the air conditioning pipe.

[0023] By adopting the above technical solution, the first guide groove and the second guide groove limit the air-conditioning pipe. The depth is greater than the outer diameter of the air-conditioning pipe to facilitate the placement and removal of the air-conditioning pipe, and the width is greater than the outer diameter of the air-conditioning pipe to reduce the probability of the high-temperature air-conditioning pipe being stuck in the first guide groove and the second guide groove, thereby improving the convenience of taking out and limiting the air-conditioning pipe.

[0024] Optionally, edges of the first guide groove and the second guide groove extending along the length direction are both provided with arc chamfers.

[0025] By adopting the above technical solution, the arc chamfer improves the convenience of inserting and removing the air-conditioning pipe.

[0026] Optionally, the anti-blocking pin is made of stainless steel.

[0027] By adopting the above technical solution, the stainless steel material reduces the probability of high-temperature deformation of the anti-blocking pin, thereby improving the rigidity and service life of the anti-blocking pin during welding.

[0028] Optionally, a drainage port for introducing solder is provided at the connection between the pressing plate body and the welding hole.

[0029] By adopting the above technical solution, the drainage port improves the convenience of introducing solder.

[0030] In summary, the present application includes at least one of the following beneficial technical effects:

[0031] 1. Place the pipeline pressure plate on the positioning seat, insert the air-conditioning pipe into the pipeline pressure plate, and at the same time, the anti-blocking parts reduce the probability of welding blockage during welding, thereby improving the welding quality between the air-conditioning pipe and the pipeline pressure plate. At the same time, the air-conditioning pipe is limited by the limiting component to reduce the probability of the position of the air-conditioning pipe offset during welding, thereby improving the accuracy of the welding angle, thereby improving the welding quality of the automobile air-conditioning pipe, reducing the amount of rework and scrap of the product, and thereby reducing the production cost.

[0032] 2. Insert the connecting pipe into the positioning hole, and at the same time, the anti-blocking pin passes through the through hole, and then insert the air-conditioning pipe into the welding hole. At this time, the anti-blocking pin extends into the air-conditioning pipe to prevent blocking during welding and reduce the probability of weld nodules blocking the through holes, thereby improving the welding quality of automobile air-conditioning pipelines.

[0033] 3. The pipeline pressure plate is positioned through the positioning hole and the limit pin, and the first guide groove and the second guide groove limit the air-conditioning pipe at the same time, so as to improve the accuracy of the welding angle between the air-conditioning pipe and the pipeline pressure plate during the welding process, thereby improving the welding quality of the automobile air-conditioning pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the overall structure of this application;

[0035] Figure 2 It is a schematic diagram of the connection between the air conditioning pipe and the pipe pressure plate in this application;

[0036] Figure 3 is a cross-sectional view of the pipeline pressure plate in the present application;

[0037] Figure 4 It is a schematic diagram of the structure of the limit assembly in this application;

[0038] Figure 5 It is a schematic diagram of the connection between the anti-blocking pin, the pipeline pressure plate and the air conditioning pipe in the present application, wherein the positioning seat, the anti-blocking pin, the pipeline pressure plate and the air conditioning pipe are partially cut away;

[0039] Figure 6 yes Figure 5 Enlarged schematic diagram of part A in the middle.

[0040] Figure numerals: 1. Support base; 11. Air conditioning pipe; 2. Positioning seat; 21. Anti-blocking pin; 22. Positioning hole; 23. Limit pin; 3. Pipeline pressure plate; 31. Pressure plate body; 32. Connecting pipe; 321. Through hole; 33. Welding hole; 34. Drainage port; 35. Limit hole; 4. Limit assembly; 41. First support rod; 42. Second support rod; 43. First limit block; 431. First guide groove; 44. Second limit block; 441. Second guide groove; 45. Arc chamfer. DETAILED DESCRIPTION

[0041] The following is combined with Figure 1-6 This application is described in further detail.

[0042] The embodiment of the present application discloses a welding tool for automobile air-conditioning pipelines.

[0043] Reference Figure 1 and Figure 2 A welding tool for automobile air-conditioning pipelines includes a supporting base 1 and a positioning base 2 arranged on the supporting base 1. The positioning base 2 is used to support a pipeline pressure plate 3. The positioning base 2 is provided with an anti-blocking member to prevent welding blockage. The supporting base 1 is also provided with a limiting component 4 for limiting the air-conditioning pipe 11.

[0044] Reference Figure 1 and Figure 2 The support base 1 is made of hexagonal aluminum alloy bar, and the diameter of the bar is between φ27-φ31mm, such as φ27mm, φ29mm, φ30mm, φ31mm, etc., to save cost and increase the service life of the support base 1. The positioning seat 2 is fixedly installed on the upper surface of the support base 1. The projection of the positioning seat 2 in the vertical direction is consistent with the projection of the pipeline pressure plate 3. The height of the positioning seat 2 is designed to be between 80mm-100mm, such as 80mm, 90mm, 95mm, 100mm, etc., to achieve timely heat dissipation and reduce the probability of deformation.

[0045] In this embodiment, the rod diameter is φ31mm, the positioning seat 2 is made of aluminum alloy material, and the height is 100mm. The aluminum alloy material reduces the weight of the tooling and the production cost, while reducing the probability of rusting during subsequent use of the tooling, thereby extending the service life of the tooling. In other embodiments, material selection and design can be carried out according to actual production conditions, and this application does not impose any restrictions.

[0046] Reference Figure 2 and Figure 3 The pipeline pressure plate 3 includes a pressure plate body 31 and a connecting pipe 32 arranged on one side of the pressure plate body 31. The outer surface of the connecting pipe 32 has a thread for easy connection with other components. The connecting pipe 32 has a through hole 321 that penetrates the pressure plate body 31. The other side of the pressure plate body 31 has a welding hole 33 for inserting the air-conditioning pipe 11. The welding hole 33 is coaxial with the through hole 321 and is connected; a drainage port 34 for introducing solder is provided at the connection between the pressure plate body 31 and the welding hole 33. The diameter of the bottom end of the drainage port 34 is consistent with the inner diameter of the welding hole 33, and the diameter of the top end of the drainage port 34 is larger than the diameter of the bottom end of the drainage port 34.

[0047] Reference Figure 2 and Figure 3 In the embodiment of the present application, the air-conditioning pipe 11 selects a small pipe with a diameter of less than φ9, the inner diameter of the welding hole 33 is larger than the inner diameter of the connecting pipe 32, that is, the inner diameter of the welding hole 33 is larger than the diameter of the through hole 321, and the inner diameter of the welding hole 33 is larger than the outer diameter of the air-conditioning pipe 11, the inner diameter of the air-conditioning pipe 11 is larger than the inner diameter of the connecting pipe 32, that is, the inner diameter of the air-conditioning pipe 11 is larger than the diameter of the through hole 321.

[0048] Reference Figure 1 , Figure 2 and Figure 4 A positioning hole 22 for positioning the connecting pipe 32 is opened on the upper surface of the positioning seat 2. The anti-blocking part is arranged in the positioning hole 22. The inner diameter of the positioning hole 22 is larger than the outer diameter of the connecting pipe 32. The anti-blocking part is an anti-blocking pin 21. The anti-blocking pin 21 is made of stainless steel material. The anti-blocking pin 21 is coaxially fixed in the positioning hole 22 and passes through the through hole 321 and the welding hole 33 in sequence.

[0049] Reference Figure 4 and Figure 5 A limiting pin 23 is provided on one side of the positioning seat 2 with a positioning hole 22, and a vertical limiting hole 35 is provided on the pressure plate body 31. The limiting hole 35 passes through the pressure plate body 31. When the connecting pipe 32 is located in the positioning hole 22, the limiting pin 23 is inserted in the limiting hole 35 to limit the pressure plate body 31.

[0050] Reference Figure 5 and Figure 6During welding, the connecting pipe 32 is inserted into the positioning hole 22, and the limiting pin 23 is inserted into the limiting hole 35. The anti-blocking pin 21 passes through the through hole 321 and the welding hole 33. The height of the anti-blocking pin 21 is at least 2 mm higher than the upper surface of the pressure plate body 31. In this embodiment, the height of the anti-blocking pin 21 exceeds the pressure plate body 31 by 2 mm, and the anti-blocking pin 21 extends into the air-conditioning pipe 11. The outer diameter of the anti-blocking pin 21 is smaller than the inner diameter of the connecting pipe 32, that is, the outer diameter of the anti-blocking pin 21 is smaller than the diameter of the through hole 321. At the same time, the outer diameter of the anti-blocking pin 21 is 0.8 mm-1.1 mm smaller than the inner diameter of the air-conditioning pipe 11. In this embodiment, the outer diameter of the anti-blocking pin 21 is 1 mm smaller than the inner diameter of the air-conditioning pipe 11, so as to reduce the probability that the anti-blocking pin 21 cannot be removed normally due to expansion or breakage caused by high temperature during welding. In other embodiments, the design can be carried out according to actual production conditions, and this application is not limited.

[0051] Reference Figure 5 and Figure 6 , insert the air-conditioning pipe 11 into the welding hole 33, and at the same time, the anti-blocking pin 21 extends into the air-conditioning pipe 11, the bottom end of the air-conditioning pipe 11 contacts the bottom wall of the welding hole 33 and is located above the through hole 321, and the solder is introduced through the drainage port 34. The solder is located in the space between the outer wall of the air-conditioning pipe 11 and the inner wall of the welding hole 33 to realize welding, and the anti-blocking pin 21 is used to fill the through hole 321 and the air-conditioning pipe 11 to reduce the probability of solder flowing into the through hole 321 and the air-conditioning pipe 11, thereby reducing the probability of the weld nodule blocking the through hole 321, thereby improving the welding quality of the automobile air-conditioning pipeline.

[0052] Reference Figure 1 and Figure 4 The limiting assembly 4 includes a first support rod 41 and a second support rod 42. The first support rod 41 is fixedly mounted on the support base 1. The height of the first support rod 41 is greater than the height of the positioning seat 2. A first limiting block 43 for limiting the air-conditioning pipe 11 is fixedly mounted on the first support rod 41. A first guide groove 431 is provided on the first limiting block 43 along the length direction; the second support rod 42 is fixedly mounted on the first support rod 41. A second limiting block 44 for limiting the air-conditioning pipe 11 is fixedly mounted on the second support rod 42. The height of the second limiting block 44 is higher than that of the first limiting block 43. A second guide groove 441 is provided on the second limiting block 44 along the length direction.

[0053] Reference Figure 1 and Figure 4The first guide groove 431 and the second guide groove 441 extend along the length direction of the air-conditioning pipe 11 and are adapted to the inclination angle of the air-conditioning pipe 11. The depth and width of the first guide groove 431 and the second guide groove 441 are both greater than the outer diameter of the air-conditioning pipe 11. The depth of the first guide groove 431 and the second guide groove 441 is greater than the outer diameter of the air-conditioning pipe 11 by 1-1.5 mm, which is 1 mm in this embodiment, and the width is greater than the outer diameter of the air-conditioning pipe 11 by 0.4-0.5 mm, which is 0.5 mm in this embodiment, so as to facilitate the placement of the air-conditioning pipe 11 and reduce the probability of angle deviation during welding of the air-conditioning pipe 11. The edges of the first guide groove 431 and the second guide groove 441 extending along the length direction are both provided with arc chamfers 45 for facilitating the placement of the air-conditioning pipe 11. When the air-conditioning pipe 11 is inserted into the welding hole 33, the air-conditioning pipe 11 is positioned in the first guide groove 431 and the second guide groove 441.

[0054] Reference Figure 1 and Figure 4 In this embodiment, the first support rod 41, the second support rod 42, the first limit block 43 and the second limit block 44 are all made of aluminum alloy. In other embodiments, the material can be selected according to the actual production conditions, and this application does not impose any restrictions.

[0055] Reference Figure 1 and Figure 6 , insert the connecting pipe 32 into the positioning hole 22, and insert the limiting pin 23 into the limiting hole 35, so as to position the pipeline pressure plate 3, insert the air-conditioning pipe 11 into the welding hole 33, and extend the anti-blocking pin 21 into the air-conditioning pipe 11, and at the same time, put the end of the air-conditioning pipe 11 away from the positioning seat 2 into the first guide groove 431 and the second guide groove 441, so as to limit the air-conditioning pipe 11, thereby reducing the probability of angle deviation between the air-conditioning pipe 11 and the pipeline pressure plate 3 during the welding process, thereby improving the accuracy of the welding angle of the air-conditioning pipe 11 and the pipeline pressure plate 3, thereby improving the welding quality of the automobile air-conditioning pipe, reducing the rework and scrap of the product, and thereby reducing the production cost.

[0056] The working principle of the embodiment of the present application is as follows:

[0057] Insert the connecting pipe 32 into the positioning hole 22, and insert the limiting pin 23 into the limiting hole 35, so as to position the pipeline pressure plate 3, insert the air-conditioning pipe 11 into the welding hole 33, and extend the anti-blocking pin 21 into the air-conditioning pipe 11. The bottom end of the air-conditioning pipe 11 abuts against the bottom wall of the welding hole 33 and is located above the through hole 321. At the same time, put the end of the air-conditioning pipe 11 away from the positioning seat 2 into the first guide groove 431 and the second guide groove 441, so as to limit the air-conditioning pipe 11, thereby reducing the angle deviation between the air-conditioning pipe 11 and the pipeline pressure plate 3 during the welding process. The probability of solder flowing into the through hole 321 and the air-conditioning pipe 11 is reduced, thereby reducing the probability of the weld nodule clogging the through hole 321, thereby improving the welding quality of the air-conditioning pipe 11 and the pipeline pressure plate 3 and the accuracy of the welding angle, thereby improving the welding quality of the automobile air-conditioning pipeline, reducing the amount of rework and scrap of the product, and thereby reducing the production cost.

[0058] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A welding tool for automobile air-conditioning pipelines, characterized in that: The invention comprises a support base (1) and a positioning base (2) arranged on the support base (1), wherein the positioning base (2) is used to support a pipeline pressure plate (3), the positioning base (2) is provided with an anti-blocking member for preventing welding blockage, and the support base (1) is also provided with a limiting assembly (4) for limiting the position of an air-conditioning pipe (11); the pipeline pressure plate (3) comprises a pressure plate body (31) and a connecting pipe (32) arranged on one side of the pressure plate body (31), the connecting pipe (32) has a through hole (321) penetrating the pressure plate body (31), the other side of the pressure plate body (31) has a welding hole (33) for inserting the air-conditioning pipe (11), the welding hole (33) is connected to the through hole (321), and the positioning base (2) A positioning hole (22) for positioning the connecting pipe (32) is provided on the upper surface, and the anti-blocking component is arranged in the positioning hole (22); the anti-blocking component is an anti-blocking pin (21), the anti-blocking pin (21) is coaxially fixed in the positioning hole (22) and passes through the through hole (321) and the welding hole (33) in sequence, and during welding, the anti-blocking pin (21) extends into the air-conditioning pipe (11); the inner diameters of the air-conditioning pipe (11) and the connecting pipe (32) are both larger than the outer diameter of the anti-blocking pin (21), the inner diameter of the welding hole (33) is larger than the outer diameter of the air-conditioning pipe (11) and the inner diameter of the connecting pipe (32), the outer diameter of the air-conditioning pipe (11) is larger than the inner diameter of the connecting pipe (32), and the inner diameter of the positioning hole (22) is larger than the outer diameter of the connecting pipe (32).

2. The automobile air conditioning pipeline welding tool according to claim 1 is characterized in that: A limiting pin (23) is provided on one side of the positioning seat (2) where the positioning hole (22) is opened, and a limiting hole (35) is opened on the pressure plate body (31). When the connecting pipe (32) is located in the positioning hole (22), the limiting pin (23) is inserted into the limiting hole (35) to limit the pressure plate body (31).

3. The automobile air conditioning pipeline welding tool according to claim 1 is characterized in that: The limiting component (4) comprises: A first support rod (41), the first support rod (41) being arranged on the support base (1), the first support rod (41) being provided with a first limiting block (43) for limiting the position of the air-conditioning pipe (11), the first limiting block (43) being provided with a first guide groove (431) along the length direction; A second support rod (42), the second support rod (42) being arranged on the first support rod (41), the second support rod (42) being provided with a second limiting block (44) for limiting the position of the air-conditioning pipe (11), the second limiting block (44) being provided with a second guide groove (441) along the length direction; The first guide groove (431) and the second guide groove (441) extend along the length direction of the air conditioning pipe (11); when the air conditioning pipe (11) is inserted into the welding hole (33), the air conditioning pipe (11) is positioned in the first guide groove (431) and the second guide groove (441).

4. The automobile air conditioning pipeline welding tool according to claim 3 is characterized in that: The depth and width of the first guide groove (431) and the second guide groove (441) are both greater than the outer diameter of the air conditioning pipe (11).

5. The automobile air conditioning pipeline welding tool according to claim 4 is characterized in that: The edges of the first guide groove (431) and the second guide groove (441) extending in the length direction are both provided with arc chamfers (45).

6. The automobile air conditioning pipeline welding tool according to claim 1, characterized in that: The anti-blocking pin (21) is made of stainless steel.

7. The automobile air conditioning pipeline welding tool according to claim 1 is characterized in that: A drainage port (34) for introducing solder is provided at the connection between the pressing plate body (31) and the welding hole (33).

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