Welded joint structure used for automobile brake hose and welding process of welded joint structure

Abstract

The invention relates to the technical field of hydraulic brake hose sealing, in particular to a welded joint structure used for an automobile brake hose and a welding process of the welded joint structure. The structure comprises a hose body and a joint square block which are welded and formed, one end of the hose body is of a segmental structure of a main hose body and a spline structure, the spline structure is arranged at the end of the main hose body, a stepped hole is formed in the end of the joint square block and comprises an outer-end large-diameter hole and an inner-end small-diameter hole, the spline structure and the inner-end small-diameter hole are in interference fit, the main hose body and the outer-end large-diameter hole are in clearance fit, and a copper liquid storage area is formed between the main hose body and the outer-end large-diameter hole. Compared with the prior art, the structure adopts segmental structural design, the coaxiality of the hose body and the joint square block is guaranteed through the spline structure, it is guaranteed that a welding gap between the main hose body and the outer-end large-diameter hole is even, the copper liquid capillaryflow performance is good in the welding process, the product stability is improved, and the percent of pass of products is increased.

Description

technical field [0001] The invention relates to the technical field of hydraulic brake hose sealing, in particular to a welded joint structure and welding process for automobile brake hoses. Background technique [0002] At present, the general welding technology scheme for square joints of brake hoses: after direct interference fit between the joint block and the pipe body, welding is formed. [0003] see figure 1 , the outer diameter of the pipe body 2 is greater than the inner diameter of the joint block 3. Due to the interference fit between the pipe body 2 and the joint block 3, the coaxiality between the pipe body 2 and the joint block 3 is not good, and the welding gap is uneven, which affects the welding. When the capillary fluidity of the copper liquid occurs, there is a risk of weak welding, which will eventually lead to unstable welding quality of the product and a low pass rate. [0004] Therefore, it is necessary to design a welding joint structure and welding...

AI Technical Summary

Problems solved by technology

[0003] see figure 1 , the outer diameter of the pipe body 2 is greater than the inner diameter of the joint block 3. Due to the interference fit between the pipe body 2 and the joint block 3, the coaxiality between the pipe body 2 and the joint block 3 is not good, and the welding gap is uneven, which affects the welding. When the capillary fluidity of the copper liquid is high, there is a risk of weak welding, which will eventually lead to unstable welding quality and low pass rate

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