Numerical Simulation of Dieless Drawing Process with Non-steady Processing Parameters  

作　　者：He Yong, Liu Xuefeng, Wang Zhen, Xie Jianxin University of Science and Technology Beijing, Beijing 100083, China 

出　　处：《稀有金属材料与工程》2011年第S3期179-184,共6页Rare Metal Materials and Engineering

基　　金：National Basic Research Program of China (2006CB605200);National Natural Science Foundation of China (50634010, 50674008);Program for New Century Excellent Talents in University (NCET-06-0083)

摘　　要：Since processing parameters have always been assumed to be stable in the current finite element numerical simulation of dieless drawing process, the simulation results for the product dimension tend to stabilize gradually. In fact, the dimension fluctuation exists in the forming process all the while. A mathematical model of Gauss distribution for processing parameters was employed and a finite element numerical model of dieless drawing process with non-steady processing parameters was established. Dieless drawing processing of Ni-Ti alloy wire was conducted for verifying the proposed model. The results indicated that the non-steady processing parameters model had higher simulation accuracy of the wire diameter than that given by the steady parameters model. Furthermore, the model could also be used to analyze the fluctuation characteristics in the whole dieless drawing process.Since processing parameters have always been assumed to be stable in the current finite element numerical simulation of dieless drawing process, the simulation results for the product dimension tend to stabilize gradually. In fact, the dimension fluctuation exists in the forming process all the while. A mathematical model of Gauss distribution for processing parameters was employed and a finite element numerical model of dieless drawing process with non-steady processing parameters was established. Dieless drawing processing of Ni-Ti alloy wire was conducted for verifying the proposed model. The results indicated that the non-steady processing parameters model had higher simulation accuracy of the wire diameter than that given by the steady parameters model. Furthermore, the model could also be used to analyze the fluctuation characteristics in the whole dieless drawing process.

关 键 词：dieless DRAWING non-steady processing PARAMETER thermal-mechanical coupling FINITE ELEMENT NUMERICAL simulation GAUSS distribution 

分 类 号：TG356[金属学及工艺—金属压力加工]