Manufacturing technology for round wing type butterfly bolts through cold heading

Abstract

The invention relates to a manufacturing technology for round wing type butterfly bolts through cold heading, and belongs to the field of fastener machining and production. The round wing type butterfly bolts are one type of butterfly bolts. The butterfly bolts can be divided into round wing type butterfly bolts and square wing type butterfly bolts. The two wings of each square wing type butterflybolt have edges, so that fingers of a user feel painful when the user twists the square wing type butterfly bolt. The comfort level of the round wing type butterfly bolts is higher for the user compared with that of the square wing type butterfly bolts, the user can apply larger twisting force to the butterfly bolts, and thus, the fastening effect of the butterfly bolts is better. In the prior art, a machining technology for round wings of the round wing type butterfly bolts mostly adopts a casting method which has obvious defects, such as poor mechanical properties and thick structure, the butterfly bolts are small in size, the casting difficulty is high for casting workers, consequentially, the labor intensity is high, and the quality of obtained castings is unstable. The manufacturingtechnology comprises the steps of blank cold heading, round head stamping, stamping forming, round wing pressing, punching, rivet preparing and rivet cold heading.

Description

technical field [0001] The invention relates to a manufacturing process of a round-wing butterfly bolt, which belongs to the field of fastener processing and production. Background technique [0002] The round wing butterfly bolt is a kind of butterfly bolt. When the wing nut is in use, it can be rotated only by turning the wings of the wing bolt with bare hands, so as to achieve the effect of fastening. Wing bolts can be divided into circular wing butterfly bolts and square wing butterfly bolts. Due to the edges and corners of the two wings of the square-wing butterfly bolt, the user's fingers will feel pain when twisting, so the square-wing butterfly bolt cannot be tightened. Compared with the square-wing butterfly bolt, the round-wing butterfly bolt is more comfortable for the user, and the user can apply a greater torque to the butterfly bolt to make the tightening effect better. [0003] In the prior art, the processing technology for the circular wing in the circu...

AI Technical Summary

Problems solved by technology

The disadvantages of the casting method are prominent, such as poor mechanical properties and coarse structure; the size of the butterfly bolt is small, the foundry workers have great difficulties in casting, the corresponding labor intensity is high, and the quality of the castings obtained is unstable; the processing speed of the lathe processing method is slow, and A lot of iron filings are generated, and there is a lot of material waste

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