Method for forming port of bellows of bullet train coupling

Abstract

The invention discloses a method for forming a port of a bellows of a bullet train coupling. The method specifically comprises procedures as follows: (1) U-shaped waves are formed at one end of the port of the bellows in a hydraulic forming manner with a circular part as a basis; (2) the part, where U-shaped waves are not formed, of the port is cut off with a cutting machine; (3) the circular part is taken as a basis, and the U-shaped waves form a pressed edge through a press machine; (4) a first V-shaped right-angle wave is formed at the other end of the port of the bellows in a hydraulic forming manner with a casing part as a basis; (5) a second V-shaped right-angle wave which is close to the first V-shaped right-angle wave and is continuous and opposite is formed in a hydraulic forming manner; (6) the two V-shaped right-angle waves form a pressed edge through the press machine with the casing part as a basis, and a seal ring is tightly pressed in an annular groove of the casing part. Compared with an existing method, the method has the advantages that residual stress of the tightly pressed seal ring is increased, the sealing property of the bellows of the bullet train coupling can be improved, leakage of lubricating grease is avoided, and the service life of the bullet train coupling is prolonged.

Description

technical field [0001] The invention relates to a method for forming a port of a corrugated pipe, in particular to a method for forming a port of a corrugated pipe for a motor vehicle coupling. Background technique [0002] The sealing method of the motor vehicle coupling adopts bellows port forming, and relies on the residual stress after forming to compress the sealing ring. At present, one port of the bellows of the motor vehicle coupling is based on the circular ring, and forms a U-shaped wave through hydroforming, and forms a blank under the action of a press; the other port is based on the shell, and is formed through hydroforming. Two U-shaped waves form the blank holder under the action of the press. However, the U-shaped wave forming process reduces the residual stress of the compressed sealing ring, resulting in a decrease in the overall sealing performance of the bellows, causing grease leakage inside the coupling, increased wear of the internal and external gear...

AI Technical Summary

Problems solved by technology

However, the U-shaped wave forming process reduces the residual stress of the compressed sealing ring, resulting in a decrease in the overall sealing performance of the bellows, causing grease leakage inside the coupling, increased wear of the internal and external gears of the coupling, and eventually causing the coupling to be scrapped

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