Method for processing stainless steel tube rolling thread

Abstract

The invention provides a stainless steel pipe thread rolling processing method. The pipe contraction disposal is carried out before the rolling processing, a three-shaft thread rolling processing process is carried out and conical pipe thread is rolled on the external surface of the pipe end. The invention aims at solving the forming problem of the conical pipe thread when the cold rolling processing is carried out, in order to improve the precision and strength of the conical pipe thread, implement the optimum thread type and correct the non-roundness of the steel pipe. The detailed operation flows comprise a pipeline cutting, a pipeline chamfering, pipe reduction disposal, pressing and fixing the pipe end by a hydraulic pressing device, processing the pipe end into the conical pipe shape by the reciprocating motion of a punching device on the pipe end, the three-shaft thread rolling processing which inserts the pipe end after the pipe reduction disposal into a revolution body chamber which is formed by the mutual inscribed three-shaft idler wheel which is symmetrically arranged, rolling the conical pipe thread on the external surface of the pipe end by the axial feeding force which is acted on the pipe end by the rotation of the three-shaft idler wheel, and the linear reciprocating extrusion feeding motion of the three-shaft idler wheel on the external surface of the pipe end.

Description

technical field [0001] The invention relates to an improvement of a thread rolling processing method for stainless steel pipes, which belongs to the field of mechanical manufacturing. Background technique [0002] The existing stainless steel pipes used for connection and sealing generally need to be manufactured and processed with tapered pipe threads at the pipe ends. Because cold working of stainless steel is prone to cold work hardening, the existing stainless steel pipe thread processing adopts cutting processing, which destroys the strength of the steel pipe, poor precision, poor working environment and high labor intensity. If the tube is not shrunk, the thread rolling of the stainless steel tube can also be carried out, but the thread pressure is poor, cracks are prone to occur, and there are problems of unfinished ends. Contents of the invention [0003] The thread rolling processing method of the stainless steel tube according to the present invention is to solv...

AI Technical Summary

Problems solved by technology

Because cold working of stainless steel is prone to cold work hardening, the existing stainless steel pipe thread processing adopts cutting processing, which destroys the strength of the steel pipe, poor precision, poor working environment and high labor intensity

If the tube is not shrunk, the thread rolling of the stainless steel tube can also be carried out, but the thread pressure is poor, cracks are prone to occur, and there is a problem of unfinished ends

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