基于 Deform 的3C 产品铝型材挤压过程的数值模拟∗

摘要

3C 产品的外形尺寸小,对尺寸公差要求严格,挤压时初胚的温度分布、模具的弹性变形及设计等都会影响最后产品的尺寸与精度。针对3C 产品的型材挤压成型过程,设计了3种焊合室结构,基于有限元软件 Deform-3D,进行了模穴内初胚的塑流形态分析,基于 Die Stress Analysis 模块,进行了模具在挤制过程中的变形、应力和应变等参数的模拟。由模拟结果分析可知,扩模型模具的位移量最大。另外,还对对应模具的设计准则,以及应力、位移分布进行了研究。%The tolerance for 3C product with small size is strictly required.The temperature distribution of the billet, the elastic deformation of the die,and the design of the flow guide all affect the final dimension of the product.with 3C products for profile extrusion molding process,design three kinds of welding chamber structure,and use the finite element code Deform-3D to simulate the plastic flow of the billet inside the die cavity.Base on Die Stress Analysis module,simulate die in extruding process of deformation,stress,strain and other parameters.The simulation results show the amount of dis-placement of the largest expansion of the model mold.Finally,a die design guide is proposed and the stress,strain distribu-tions are discussed systematically.