锻压技术

基于Workbench的重型电动数控螺旋压力机机身轻量化设计

英文标题：Lightweight design on heavy-duty electric CNC screw press body based on Workbench

单位：1.山东理工大学 2.中锻智能装备设计院(青岛)有限公司 3.青岛宏达锻压机械有限公司

分类号：TG315

出版年,卷(期):页码：2024,49(3):178-185

摘要：

针对当前压力机机身笨重与材料浪费的问题，以EP-12500重型电动数控螺旋压力机机身为研究对象，探索压力机机身结构的轻量化设计方法。首先，基于Workbench 对压力机机身进行有限元分析，得到机身应力值远小于材料屈服强度的非承载区域；然后，采用拓扑优化模块对机身非承载区域进行拓扑优化；最后，以质量最小化为目标，确定机身结构材料去除区域的具体位置，实现对机身结构的轻量化设计。优化结果表明：优化后压力机机身的体积与质量均减小了9.65%，实现了机身轻量化，减少了制造成本；机身预紧工况下最大变形量增加了0.17 mm，打击工况下最大变形量增加不足0.01 mm，与原机身变形基本一致；机身预紧工况下垂直刚度为8.21 MN·mm-1，打击工况下垂直刚度为13.08 MN·mm-1，均满足使用要求；机身预紧工况下最大等效应力降低了2.51%，打击工况下最大等效应力降低了18.3%，降低了底座承受的冲击力，提高了底座的使用寿命。

Aiming at the problem of heavy press body and waste of materials, for EP-12500 heavy-duty electric CNC screw press body, the method of lightweight design for press body structure was explored. Firstly, the finite element analysis on the press body was conducted based on Workbench, and the non-bear zone where the stress value of press body was far less than the yield strength of material was obtained. Then, the non-bear zone of press body was topologically optimized by topology optimization modules. Finally, with the goal of minimizing the mass, the specific position of material removal for the press body structure was determined to realize the lightweight design of press body structure. The optimization results show that the volume and mass of press body are reduced by 9.65% after optimization, which realizes the lightweight of press body and reduces the manufacturing cost. The maximum deformation amount of press body under the preloading condition is increased by 0.17 mm, and the maximum deformation amount under the striking condition is increased by less than 0.01 mm, which is basically consistent with the original press body deformation. The vertical stiffness of press body under the preloading condition is 8.21 MN·mm-1 , and the vertical stiffness under the striking condition is 13.08 MN·mm-1, which all meet the use requirements. The maximum equivalent stress of press body under the preloading condition is reduced by 2.51%, and the maximum equivalent stress under the striking condition is reduced by 18.3%, which reduces the impact force borne by the base and improves the service life of base.

基金项目：

2022年青岛市科技计划重点研发专项（22-3-2-qljh-10-gx）

作者简介：姚佰成（1999-），男，硕士研究生，E-mail：ybc1234562022@163.com；通信作者：赵国勇（1976-），男，博士，教授，博导，E-mail：zgy709@126.com

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