Non-welded pipeline joint of automobile air conditioner and machining method of non-welded pipeline joint

Abstract

The invention discloses a non-welded pipeline joint of an automobile air conditioner and a machining method of a non-welded pipeline joint. The non-welded pipeline joint comprises a hollow tube and an external threaded joint, wherein the head part of the external threaded joint is an external thread; the tail part of the external threaded joint is hexagonal; the front part in the external threaded joint is a big through hole; the tail part in the external threaded joint is a small through hole; the big through hole is connected with the small through hole through a conical hole; and the external diameter of the head part of the hollow tube is as same as the diameter of the big through hole. An angle between the conical hole and the axis of the hollow tube is 30-60 degrees. The angle between the conical hole and the axis of the hollow tube is preferably 45 degrees. A flared opening is turned over outwards from the open end of the big through hole. The invention further discloses a machining method of the non-welded pipeline joint of the automobile air conditioner. The non-welded pipeline joint of the automobile air conditioner and the machining method of the non-welded pipeline joint, disclosed by the invention, have the benefits as follows: manual welding is not needed; a molded product does not need to be washed by special medicinal liquid and only needs to be degreased by using common medicinal liquid; nitrogen detection is not needed for the molded product; no leakage is caused; and the cost can be saved.

Description

technical field [0001] The invention relates to an automobile air-conditioning pipe joint and a processing method thereof. Background technique [0002] The refrigerant pipelines of automobile air conditioners are usually formed with hollow aluminum tubes according to the internal structure of different vehicles. Set joints, prior art pipe joints such as figure 1 As shown, the hollow pipe 1, the external threaded joint 2, the head of the external threaded joint 2 is an external thread 23, the tail is a hexagonal 24 for wrench tightening, and the external threaded joint 2 is provided with a diameter slightly larger than the outer diameter of the hollow pipe 1. The middle hole 25 and the large hole 22 whose diameter is greater than the outer diameter of the hollow tube 1, and the small hole 21 which is larger than the inner diameter of the hollow tube 1 and smaller than the outer diameter of the hollow tube 1 is arranged between the large hole 22 and the middle hole 25, and t...

AI Technical Summary

Problems solved by technology

[0003] 1. It is necessary to process the nut with a solid hexagonal rod, which is a waste of cost;

[0004] 2. Manual welding is required, and some products will be scorched and burnt during the welding process;

[0005] 3. Welded products need to be cleaned with special liquid medicine, which is not environmentally friendly;

[0006] 4. Nitrogen detection is required, which increases the cost

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