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Method for processing stainless steel tube rolling thread

A technology of stainless steel pipes and processing methods, which is applied to threaded products, other household appliances, household appliances, etc., can solve problems such as unfinished ends, poor working environment, and poor thread pressure.

Inactive Publication Date: 2009-09-23
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 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

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 ta...

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Abstract

The stainless steel pipe thread rolling processing method described in the present invention adopts shrinkage treatment before rolling processing, and uses a three-axis thread rolling processing process to roll out tapered pipe threads on the outer surface of the pipe end. The purpose of the invention is to solve the forming problem of the tapered pipe thread during cold pressing, so as to improve the precision and strength of the tapered pipe thread, realize a more optimized thread profile and correct the out-of-roundness of the steel pipe. The specific operation process includes pipeline truncation; pipeline chamfering; tube shrinkage treatment, using a hydraulic compression device to compress and fix the tube end, and using a stamping device to reciprocate on the tube end to process the tube end into a tapered tube shape; Three-axis thread rolling processing, insert the pipe end after shrinkage treatment into the cavity of the rotary body of the three-axis roller, and roll out the cone on the outer surface of the pipe end by the axial feed force applied to the pipe end through the rotation of the three-axis roller. For pipe thread, the three-axis roller makes a linear reciprocating extrusion feed motion on the outer 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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Patent Type & Authority Patents(China)
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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