Method for processing stainless steel tube rolling thread

A technology of stainless steel pipe and processing method, which is applied to threaded products, other household appliances, household appliances, etc., can solve problems such as unfinished ends, high labor intensity, and poor accuracy.

Inactive Publication Date: 2008-07-02
CRRC QINGDAO SIFANG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 envi

Method used

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  • Method for processing stainless steel tube rolling thread
  • Method for processing stainless steel tube rolling thread
  • Method for processing stainless steel tube rolling thread

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1, such as Figure 1 to Figure 3 As shown, the stainless steel pipe thread rolling processing method includes the following processes:

[0021] In the first step, the pipeline is cut off, and the stainless steel pipe 4 processed by thread rolling is cut to the corresponding size according to the use requirements;

[0022] The second step is chamfering the pipeline, chamfering the pipe end of the truncated stainless steel pipe 4;

[0023] The third step is to shrink the pipe. Use the hydraulic compression device 7 to compress the pipe end to fix the pipe end between the compression device 7 and the stamping device 6, and use the stamping device 6 to reciprocate on the pipe end to press the pipe end The pipe end is stamped into the shape of the tapered tube inner chamber 9 of the pipe shrinking die 8, that is, the pipe end after shrinking the pipe is in the shape of a tapered pipe.

[0024] Process the shrinkage taper of the pipe end to the same taper as the tap...

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PUM

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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...

Claims

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Application Information

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IPC IPC(8): B23P13/00B21D41/04B21H3/04
Inventor 王小成吕任远马瑜业
Owner CRRC QINGDAO SIFANG CO LTD
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