An Extrusion Process for Producing Asymmetric Special-shaped Seamless Pipes Using Round Pipes

An asymmetrical and seamless tube technology, applied in the field of extrusion technology, can solve problems such as product inner cavity twisting, thimble rotation, affecting normal production, etc., to achieve the effect of improving balance and uniform force

Active Publication Date: 2018-07-13
SOUTHWEST ALUMINUM GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Since the thimble is fixedly installed on the needle connector through a threaded connection, the rotation of the thimble often occurs during the current extrusion process, resulting in twisting of the inner cavity of the product and affecting normal production

Method used

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  • An Extrusion Process for Producing Asymmetric Special-shaped Seamless Pipes Using Round Pipes
  • An Extrusion Process for Producing Asymmetric Special-shaped Seamless Pipes Using Round Pipes

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Embodiment Construction

[0018] For ease of understanding, the present invention will be further described below in conjunction with the accompanying drawings.

[0019] see figure 1 , a flow chart of an extrusion process for producing an asymmetric special-shaped seamless pipe using a round pipe provided by the present invention, specifically including:

[0020] Step S11, take the center of the exit of the extrusion cylinder as the origin as the auxiliary coordinate axes X and Y, wherein the axis X is the horizontal axis, the axis Y is the vertical axis, and the plane P where the axes X and Y are located is parallel to the end surface of the extrusion cylinder.

[0021] It should be noted that the auxiliary coordinate axes X and Y are virtual straight lines, which only serve to divide the section of the cavity and will not affect the extrusion of the raw material tube from the exit of the extrusion cylinder.

[0022] Step S12, adjust the position of the thimble and the mold along the direction parall...

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Abstract

The invention provides an extrusion process for producing an asymmetric special-shaped seamless tube by utilizing a circular tube. The extrusion process specifically comprises the steps of A. making auxiliary coordinate axes X and Y by using the center of a circle of an outlet of an extrusion container as an original point, wherein the axis X is a horizontal axis, the axis Y is a vertical axis, and a plane P on which the axis X and the axis Y are positioned is parallel to the end surface of the extrusion container; B. adjusting the positions of an ejector pin and a mold along the direction parallel to the plane P, so that the area of the cross section of a mold cavity is equally divided by the axis X and the axis Y, and the mold is fixedly connected to the outlet end of the extrusion container; C. leading the circular tube which is heated to first temperature into the extrusion container, and pushing the circular tube out of the outlet end of the extrusion container at first advance speed, so as to obtain the asymmetric special-shaped seamless tube. According to the extrusion process provided by the invention, the ejector pin can be prevented from rotating in an extrusion process, so that an inner cavity of a product is prevented from twisting, thereby guaranteeing normal production.

Description

technical field [0001] The invention relates to the technical field of producing asymmetric special-shaped seamless pipes, in particular to an extrusion process for producing asymmetric special-shaped seamless pipes using round pipes. Background technique [0002] Special-shaped seamless pipes refer to seamless pipes with cross-sectional shapes other than round pipes, and special-shaped seamless pipes with asymmetric cross-sections are called asymmetric special-shaped seamless pipes. Through the extrusion process, the round pipe is plastically deformed to obtain an asymmetric special-shaped seamless pipe. The specific process is as follows: [0003] The heated round tube is introduced into the extrusion cylinder, and a mold is set at the exit of the extrusion cylinder, and a thimble is pierced in the mold, and the thimble and the inner wall of the mold form a cavity, and the tube enters the cavity after passing through the extrusion cylinder to undergo plasticity. Deformati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C23/08B21C29/00B21C37/15
CPCB21C23/085B21C29/003B21C37/15
Inventor 张玉春陈庆
Owner SOUTHWEST ALUMINUM GRP
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