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一、前言挤压是塑性加工的一种重要工艺,主要制品有棒材、管材、带板及各种复杂断面的型材,用途十分广泛。挤压制品的机械性能、各种缺陷的产生与消除、模具寿命、能量消耗等等,均与金属的流动状态、内部应力应变的分布、工具与金属之间接触应力的分布及各种工艺参数相关。本文的目的在于用密栅云纹法实验和塑性理论相结合,模拟、研究挤压过程,为理论分析和生产实践提供科学依据。
I. Introduction Extrusion is an important process of plastic processing, the main products are rods, pipes, plates and a variety of complex cross-section profiles, uses a very wide range. Extrusion products mechanical properties, the emergence and elimination of various defects, mold life, energy consumption, etc., are related to the metal flow state, the distribution of internal stress and strain, contact stress distribution between tools and metals and a variety of process parameters Related. The purpose of this paper is to simulate and study the extrusion process by using the theory of dense grid moire experiment and plasticity theory to provide a scientific basis for theoretical analysis and production practice.