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Reducing rotary forging method for internal thread copper pipe

A processing method and internal thread technology, which are used in metal processing equipment, manufacturing tools, forging/pressing/hammer devices, etc., can solve the problems of high equipment investment cost, high mold operating cost, large workshop area, etc. High efficiency, easy to popularize and use, less processing waste

Inactive Publication Date: 2011-04-06
HEFEI GREAT WALL REFRIGERATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] (1) The cost of equipment input is high, and the plant covers a large area;
[0004] (2) The equipment maintenance cost in the later period is high, and the mold operation cost is high

Method used

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  • Reducing rotary forging method for internal thread copper pipe
  • Reducing rotary forging method for internal thread copper pipe

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Experimental program
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Effect test

Embodiment Construction

[0021] figure 1 A method for processing an internally threaded copper pipe with variable diameter and swaging is shown, comprising the following steps:

[0022] 1) Using the hollow copper tube 301 as the processing object saves raw materials compared with the prior art that takes the solid copper rod as the processing object, and the pipe wall of the processed internally threaded copper pipe is also relatively thin.

[0023] 2) By adjusting the proportioning voltage and input current value in the power mechanism, when the variable-diameter shrink cavity mold is driven to reduce the diameter, the hollow copper tube 301 is frictionally heated to make the temperature of the friction area reach 990°C ~1030°C, so that the rotating thread processing area of ​​the hollow copper tube 301 reaches a semi-solid state, and at the same time, the contact surface and contact angle between the hollow copper tube 301 and the rotating thread core 302 reach the best matching point. During this ...

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Abstract

The invention discloses a reducing rotary forging method for an internal thread copper pipe, in particular a method for machining the internal thread copper pipe by reducing spinning and the extrusion of rotating roller cores. In the machining method, the rotating roller cores with threads are adopted while the reducing spinning is performed, and the inner wall of the cooper pipe is subjected extrusion molding under the action of friction force to ensure that continuous and uniform threads exist on the inner surfaces of copper pipes, and the inner surfaces have the distinct threads, controlled lines and few residues.

Description

[technical field] [0001] The invention relates to the technical field of metal processing, in particular to a variable-diameter swaging processing method for internally threaded copper pipes used in refrigeration pipelines. [Background technique] [0002] Metal processing technology is a forming technology that must be involved in all industries involving metal products. However, because of the different scope and conditions of use of metal products, the specific processing and forming technology of metal products is determined. Most of the pipeline components used in the fields of air conditioners and refrigerators and freezers are made of metal products. With the continuous improvement of the manufacturing level of the domestic refrigeration industry, the product quality of the entire industry has been improved year by year, and the relevant supporting enterprises have put forward higher requirements for the products, which has promoted the technological progress of the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/02B21J13/02B21J9/20B21J9/18
Inventor 马功权田四光潘文峰
Owner HEFEI GREAT WALL REFRIGERATION TECH
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