铜扁线连续挤压过程温度场的数值模拟  

Numerical simulation of temperature field of copper flat wire continuous extrusion forming

作　　者：吴朋越[1] 谢水生[1] 鄢明 程磊[1] 黄国杰[1] 

机构地区：[1]北京有色金属研究总院有色金属材料制备加工国家重点实验室,北京100088 [2]云南铜业铜材有限公司,云南昆明650102

出　　处：《锻压技术》2007年第3期46-49,共4页Forging & Stamping Technology

基　　金：云南省科技攻关项目(2005yx12)

摘　　要：采用刚-粘塑性有限元法,基于Deform-3D软件平台,针对铜扁线连续挤压成形过程,进行了三维有限元数值模拟。通过有限元模拟,获得了不同挤压轮转速下铜扁线连续挤压成形过程温度场分布。结果表明,在连续挤压过程中,由于摩擦和变形功的作用,变形体温度逐渐升高。温度的升高主要来自于压实轮的压下和镦粗两个阶段,即温度的升高主要来自于变形功。当挤压轮转速达到1.2564 rad.s-1时,模具回火软化而损坏,从而使挤压过程无法进行。因此,在铜扁线连续挤压过程中,挤压轮转速不能超过1.2564 rad.s-1。The continuous extrusion forming （CONFORM） process of copper flat wire was studied by three-dimensional finite-element method based on Software Deform-3D. The rigid-viscoplastic constitutive equation was employed in the model. Distribution of temperature field of copper flat wire continuous extrusion forming was obtained under different extrusion wheel velocities in the forming process. Deformation body temperature was increased remarkably due to friction and deformation power in the CONFORM process. The increased temperature was in the compression wheel press-down and upset stages. So the increase of deformation body temperature was mainly from deformation power. The die could be softened when the extrusion wheel velocity exceeds 1. 2564 rad ·s^-1. So the extrusion wheel velocity should not exceed 1. 2564 rad · s^-1 in the CONFORM of the copper flat wire.

关 键 词：温度场 连续挤压 挤压轮转速 铜扁线 

分 类 号：TG371[金属学及工艺—金属压力加工]