锻压技术

利用局部摩擦优化锻压成形的材料流动

英文标题：Optimization of material flow in forging by using local friction

作者：张立力戴映荣曹飞曾琦

单位：北京机电研究所北京机电研究所北京机电研究所北京机电研究所 100083 100083 100083 100083

关键词：数值模拟局部摩擦材料流动

分类号：TG311

出版年,卷(期):页码：2003,28(3):40-43

摘要：

在锻压成形过程中 ,摩擦不仅大大提高了模具载荷、变形温度 ,而且影响了变形过程中的应变分布及材料流动。本文采用塑性成形有限元分析锻压成形过程 ,提出改变模具局部摩擦的方法以优化工件材料流动和流动速度 ,避免锻压件的成形缺陷和确保模具中金属充满。将此方法应用于ABS汽车轮毂和曲轴成形过程 ,验证它的有效性

During the forging process, friction could not only increase the die load and deformation temperature, but also influence the strain distribution and material flow. Based on the study on forging process by FEM, this paper put forward a method to optimize the material flow and flow velocity by changing the local friction of dies, and consequently avoids the forming defects of forging pieces and make sure the material can fill the dies. This method is used in the forming process of hub and crank, and be tested effectiveness.

基金项目：

国家自然科学基金资助项目 (59990 4 70 3)

参考文献：

1　SIOh,WTWu,JPTang,A VedhanayagamCapabilitiesandap plicationsofFEM codDEFORM theperspectiveofthedevelop erJournalofMaterialsProcessingTechnology,1991,27:25～42
2　ABehrens,HSchafstall.2Dand3Dsimulationofcomplexmultistageforgingprocessesbyuseofadaptivefrictioncoefficient.JournalofMa terialsProcessingTechnology,1999,80～81:298～303
3　茹铮,余望等塑性加工摩擦学北京:科学出版社,1992

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