Transactions of Materials and Heat Treatment

Title：Energy consumption modeling and analysis on extrusion forming of porthole combination die

Authors： Yang Haidong Fang Hua Xu Kangkang Yin Sihua Zhu Chengjiu

Unit： Guangdong University of Technology

KeyWords： circular-tube extrusion energy consumption model porthole die metal flow characteristics upper-bound theory

ClassificationCode：TG376.9

year,vol(issue):pagenumber：2019,44(1):127-133

Abstract：

Extrusion forming is a typical nonlinear and high energy consumption process in the condition of large deformation and complex friction. At present, the value of energy consumption in the extrusion process is mostly calculated by measuring extrusion pressure, as a result, some problems such as additional cost and equipment interference are caused. For the above problems, a novel extrusion energy consumption model was presented. For a circulartube extrusion produced by porthole die, firstly, according to the characteristics of metal flow in the extrusion process, the extrusion process was divided into filling extrusion stage, basic extrusion stage and final extrusion stage, and then, an energy consumption model was established by the upper-bound theory according to different characteristics of each stage. At last, the accuracy of the model was verified by extruding four types of circular bar, and the influences of process parameters on the extrusion energy consumption were analysed by DOE and ANOVA methods. The results show that the proposed model can calculate the extrusion energy consumption of round tube effectively, and the initial temperature and extrusion speed of mould have a significant effect on the energy consumption of extrusion forming.

Funds：

NSFC-广东联合基金重点资助项目（U1501248）

杨海东（1973-），男，博士，教授，E-mail：yanghd@gdut.edu.cn；通讯作者：徐康康（1990-），男，博士，讲师，E-mail:xukangkang@gdut.edu.cn

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