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本文对８５０ｘ３２０ｍｍ扁挤压筒内套进行了有限元分析计算，运用优化设计理论对扁挤压筒型腔进行计算机辅助形状优化设计，确定了使应力集中系数降为最小的最优形线，为延长扁挤压筒使用寿命提供了一条有效途径。
In this paper, the finite element analysis of 850x320mm flat extrusion sleeve was carried out. The optimization design was used to optimize the computer aided shape of the flat extrusion cavity. The optimal shape line to minimize the stress concentration factor Extend the life of flat extrusion cylinder provides an effective way.