转速对多孔模连续挤压过程影响机理的仿真研究

打开文本图片集

中图分类号：TH142 文献标志码：A

Abstract： In continuous extrusion production， the rotational speed directly determines the production efficiency. The higher the rotational speed of the extrusion wheel，the greater the degree of uneven deformation of the billet，and the greater the heat of deformation，which directly affects the service life of the mold. This article simulates the continuous extrusion process of 8mm diameter brass round rod wire with four hole die under different rotational speeds. The temperature，velocity，and equivalent stress-strain distribution under different rotational speeds are analyzed. The simulation results show that increasing the rotational speed of the extrusion wheel gradually increases the maximum temperature and equivalent strain rate of the billet in steady state. The flow velocity of the edge material is lower than that of the center material，which can lead to unstable edge quality of the product. At the same time， it provides important basis for the development of porous die extrusion technology and the improvement of product quality. Through simulation analysis， the number of experiments can be reduced，greatly saving production costs.

Key words： continuous extrusion; extrusion wheel speed; brass round rod wire; four hole die; simulation

0 引言

铜及铜合金线材的传统生产工艺通常包含连铸坏料制备、热轧开坏、多道次冷拉拔、间歇式退火及表面清洗等工序，存在着生产流程冗长、效率低下等问题。（剩余9949字）