TC4钛合金T形薄壁型材挤压模具设计及优化  

Design and optimization on extrusion die for TC4 titanium alloy T-shaped thin-walled profile

作　　者：李静静 赵剑博 张志强[2] 孟凡玲[1] 柏春光[2] Li Jingjing;Zhao Jianbo;Zhang Zhiqiang;Meng Fanling;Bai Chunguang(School of Materials Science and Engineering,Shenyang Ligong University,Shenyang 110159,China;Shi-Changxu Innovation Center for Advanced Materials,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China)

机构地区：[1]沈阳理工大学材料科学与工程学院,辽宁沈阳110159 [2]中国科学院金属研究所师昌旭先进材料创新中心,辽宁沈阳110016

出　　处：《锻压技术》2023年第11期159-166,共8页Forging & Stamping Technology

基　　金：国家重点研发计划项目(2017YFB0306201)。

摘　　要：挤压模具的合理设计在钛合金挤压型材的生产中起着关键作用。使用有限元软件对TC4钛合金T形薄壁型材挤压过程进行了数值模拟。采用单因素法和正交实验法对不同结构参数进行了模拟组合,以出口标准速度场偏差SDV值作为参考依据,研究了入口圆角、模孔位置以及导流槽形状对挤压后金属成形效果的影响,并分析了挤压过程中金属的流动规律。研究结果表明:在挤压工艺条件不变的情况下,调整模具入口圆角和模孔型心与模具圆心的距离,能够获得形状较好的型材;调整导流槽形状可进一步优化模具,使金属流出模孔的速度更均匀。Reasonable design of extrusion die plays a key role in the production of titanium alloy extrusion profile.Therefore,the extrusion process of TC4 titanium alloy T-shaped thin-walled profile was numerically simulated by finite element software,and the different structural parameters were simulated and combined by single factor method and orthogonal experimental method.Then,taking standard deviation value SDV of outlet velocity field as a reference,the influences of inlet fllet,mold hole position and guide groove shape on the metal forming effect after extrusion were investigated,and the metal flow rule during the extrusion process was analyzed.The research results show that when the extrusion process conditions remain unchanged,the profile with a better shape can be obtained by adjusting the mold inlet fillet and the distance between mold hole center and mold circle center,and adjusting the shape of guide groove can further optimize the mold and make the metal flow out of the mold hole more evenly.

关 键 词：TC4钛合金 金属流动速度 导流槽 挤压模具 结构参数 

分 类 号：TG372[金属学及工艺—金属压力加工]