In order to study the laws of the extrusion pressure changing with the extrusion parameters in the process of hydrostatic extrusion for the tungsten alloys, the large deformation elasto plastic theory and the software of ANSYS 5 5 are used to carry out the numerical simulation research.

The varied laws of the extrusion pressure and stress strain with extrusion parameters in the sample are obtained.

Prediction model for extrusion force of Cu-0.75Cr alloy based on least square support vector machine;

Extrusion force is a very important craft parameter in hot extrusion,and its value was obtained mainly from experienced formula,especially the formula for pipe material was not established.

It is found that theoretical results of extrusion force given by the two calculating formulas using upper bound theorem ar.

By using the self-amend Tanner constitutive equation, the response of extrusion pressure to vibrating force field in plastic electromagnetism dynamic extruder was studied.

With 315t hydraulic pressure locomotive of four pillars,the extruding temperature,extruding force of ZCuCrl alloy and lubrication in thermal extrusion are studied,a.

But the outer extruding force of casing is one of the maximum influential factors in influencing a pair of diameter limit forces.

Taking forward extruding as an example,this paper infers a theoretical calculation formula for unit extruding force with primary stress algorithm in the plastic deformation.