Warm extrusion method and mould for continuous equal-square channel with pre-stress structure

Abstract

The invention discloses a warm extrusion method and a mould for a continuous equal-square channel with a pre-stress structure. The structural characteristics are that a reversed-bell-shaped double-layered combined concave mould pre-stress structure is adopted so that not only can mould materials be utilized effectively, but the bearing capability can also be guaranteed. The warm extrusion method comprises the following steps: analyzing a warm extrusion process of the continuous equal-square channel through finite elements by a continuous equal-square channel to obtain an optimized mould geometrical shape and a technological parameter; designing a warm extrusion experiment mould of the continuous equal-square channel according to basic requirements of low-carbon steel extrusion and molding; and improving a regular structure of a concave mould. The strength and the service life of a convex mould are not only considered in the aspect of the used materials, but also are guaranteed in the aspect of the structural design of the convex mould. With the adoption of the warm extrusion method and mould, the concave mould can be effectively prevented from being fractured; the service life of the mould is prolonged and the efficiency of experiment researches is improved; the time and the money are saved.

Description

technical field [0001] The invention relates to a continuous equal square channel warm extrusion die, in particular to an equal square channel warm extrusion die which adopts an inverted bell-shaped double-layer combined concave die prestressing structure and greatly improves the service life of the die. Background technique [0002] The traditional equal square channel warm extrusion process is to make the square extrusion part pass through two equal cross-section pipes at a certain angle under the action of the punch, so as to accumulate enough equivalent strain to achieve the purpose of grain refinement . [0003] However, the working conditions of the equal square channel extrusion process are extremely harsh. Therefore, the pre-realized extrusion of hard materials at room temperature will inevitably put forward higher requirements for mold precision, strength, rigidity and life. According to the requirements of the experiment, the optimized mold geometry and process pa...

AI Technical Summary

Problems solved by technology

However, due to the severe plastic deformation of the equal square channel warm extrusion process, the process has higher requirements for mold precision, strength, rigidity and life, and the traditional equal square channel warm extrusion die often causes die cracking phenomenon, delaying the progress of experimental research and process development, wasting a lot of time and money

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