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A kind of equal channel angular extrusion processing method of pipe material

A technology of equal-channel corner and equal-channel extrusion, which is applied in the field of strong deformation processing of metal materials, to achieve the effect of convenient loading

Active Publication Date: 2020-06-02
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The billet processed by the ECAP process is generally a columnar billet, and there is no relevant report on the equal-channel angular extrusion processing technology for the pipe billet.

Method used

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  • A kind of equal channel angular extrusion processing method of pipe material
  • A kind of equal channel angular extrusion processing method of pipe material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Equal-channel angular extrusion processing is carried out at room temperature for a copper tube blank with an inner diameter of 20mm, an outer diameter of 40mm, and a height of 60mm. The specific operations are as follows:

[0036] 1. Combination of pipe core rod:

[0037] Before discharging the pipe blank, the first hydraulic cylinder 1 drives the left core rod 10 to feed to the specified position to the right, and then the upper third hydraulic cylinder 6 drives the slider 4 and the first upper part connected to the slider. The core rod 7 and the second upper core rod 8 are fed downward until the left core rod 10 is fully matched with the end of the second upper core rod 8 to form an arc-shaped core rod.

[0038] 2. Pipe discharging process:

[0039]After completing the combination of the pipe core rods, use the hydraulic cylinders 5 on both sides of the third hydraulic cylinder 6 to move the extrusion head 3 up to a reasonable height; Move back and forth to separat...

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PUM

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Abstract

The invention discloses an equal channel angular pressing method for a pipe, and belongs to the field of metal material strong deformation processing. According to the equal channel angular pressing method, pipe processing is finished through the process of combination of pipe core rods, and discharge, extrusion and takeout of the pipe. By adopting the combined core rods, through equal channel angular pressing, pipe blanks are extruded and processed, so that grains of the pipe blanks are refined, and the strength of the pipe blanks is improved. According to the method, the left core rod is designed for matching connection with left hydraulic equipment through a dovetail groove, and the bottom of the left hydraulic equipment is provided with a slideway mechanism; when the pipe is taken out,the hydraulic equipment can be pushed to move front and back, and the core rods are promoted to separate, thereby facilitating takeout of the pipe.

Description

technical field [0001] The invention relates to the field of strong deformation processing of metal materials, in particular to an equal-channel angular extrusion processing method for pipes. Background technique [0002] Equal Channel Angular Pressing (ECAP) is a widely used severe plastic deformation technology. As one of the effective methods for preparing large-scale submicron and nano-scale ultrafine-grained materials, it has been paid more and more attention. The principle is to let the billet pass through the equal cross-section channel where the two axes intersect under the action of the extrusion force, and an approximately ideal pure shear deformation occurs at the corner, and the grains of the extruded material are refined through dislocation segmentation; due to extrusion The cross-sectional shape and area of ​​the sample before and after do not change, so the multi-pass extrusion can obtain a considerable amount of cumulative strain, which can significantly chan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C23/00
CPCB21C23/001B21C23/005
Inventor 骆俊廷郗晨阳逍遥张春祥
Owner YANSHAN UNIV