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当今的板金属成形工业 ,特别是汽车冲压领域需要开发一种成形技术 ,以加工处理大量从有限元分析、物理试验、圆网格分析等方面所获得的力学信息 ,从而判定制造合格冲压件的难易程度。本文概略地介绍了所开发的广义成形技术的内容和未来的应用发展趋势。广义成形技术以数学塑性理论为基础 ,可用于分析力学信息和建立成形性指数 ,以严格测定各类冲压缺陷。这些缺陷包括内部断裂、边缘断裂、起皱、形状变化、变形量不足和表面柔软等。理论包括 6个组成部分 :a 变形模式理论 ;b 广义成形性理论 ;c 冲压变量窗口技术 ;d 金属流动趋向性控制原理 ;e 二维冲压过程模型 ;f 冲压相似性理论。成功的应用实例已有 :a 汽车覆盖件拉深模具设计与制造 ;b 模具调试 ;c 冲压生产稳定性控制 ;d 冲压成形工程专家系统。最后 ,在所有介绍的理论基础上建立了平台 ,对未来的工作做了进一步的规划 ,提出了若干发展要点。
Today’s sheet metal forming industry, especially in the field of automotive stamping, needs to develop a forming technique to process a large amount of mechanical information obtained from finite element analysis, physical testing, and circular grid analysis to determine the Degree of difficulty. This article briefly introduces the content of generalized forming technology and future application development trend. The generalized forming technique is based on mathematical plasticity theory and can be used to analyze mechanics information and establish formability index to strictly determine various types of stamping defects. These defects include internal rupture, edge rupture, wrinkling, shape changes, lack of deformation and surface softness. The theory includes six components: a theory of deformation mode; b generalized formability theory; c stamping variables window technology; d metal flow trend control theory; e two-dimensional stamping process model; f stamping similarity theory. Successful examples of applications have been: a car cover drawing die design and manufacturing; b die debugging; c stamping production stability control; d stamping forming engineering expert system. Finally, based on all the theories introduced, a platform has been set up to further plan the future work and put forward some key points for development.