Sealing bolt, forming die and forming process

Abstract

The invention discloses a sealing bolt, a forming die and a forming process, belongs to the technical field of bolt machining, and solves the problems of poor sealing performance, low repeated utilization rate and low forming speed in the prior art, the sealing bolt comprises a head part and a rod part which are integrally formed, the head part comprises a bolt head and a flange plate which are integrally connected, and the rod part comprises a screw rod and double chamfers. The upper end and the lower end of the joint of the flange plate and the screw are oppositely provided with containing grooves for containing O-shaped rings, each containing groove comprises an inner groove recessed towards the bottom end face of the flange plate, one end of each inner groove is connected with the bottom of the flange plate through an inclined wall, and the other end of each inner groove is connected with the top end of the screw. The containing grooves are formed in the upper end and the lower end of the end of the screw correspondingly, the double-step containing space is formed through the inner grooves and the inclined walls of the containing grooves, the end of the screw is tightly wrapped by the O-shaped ring, the O-shaped ring and an opponent piece are installed in a gapless mode, the sealing performance is improved, the repeated utilization rate of the O-shaped ring is increased, through cooperation of multiple stations, a blank is subjected to rapid cold heading forming, and the forming difficulty of the sealing bolt is reduced.

Description

technical field [0001] The invention belongs to the technical field of bolt processing, and in particular relates to a sealing bolt, a forming die and a forming process. Background technique [0002] Bolt connection is a very common mechanical connection method, and now there are different bolt types and different bolt connection structures. Traditional sealing bolts are used to prevent oil and air leakage by applying thread glue on the thread or adding a flat soft metal gasket under the bolt flange. However, if the surface of the counterpart is uneven, pitted, or warped, the leakage cannot be prevented after installation. Oil, air leakage and other problems, the sealing performance cannot be guaranteed. Contents of the invention [0003] The object of the present invention is to provide a sealing bolt, a molding die and a molding process with strong sealing performance, high reusability and fast molding speed in view of the deficiencies in the prior art. [0004] In ord...

AI Technical Summary

Problems solved by technology

Traditional sealing bolts are used to prevent oil leakage and air leakage by applying thread glue on the thread or adding a flat soft metal gasket under the bolt flange. However, if the surface of the opponent is uneven, pitted, or warped, it cannot prevent leakage after installation. Oil, air leakage and other problems, the sealing can not be guaranteed

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