摘要
为了使机床立柱的静动态性能得到提升,对机床立柱的筋板结构重新进行设计。将不同筋板结构的立柱模型进行有限元分析,分别得到各立柱的静动态性能参数,将得到的参数构建了3因素4水平的正交实验表,通过综合评价法将正交表中的16组参数进行数据融合,得到了最佳组合参数为"井"形筋板结构,筋板高度为20 mm,吊孔直径为140 mm的立柱。优化后的立柱在质量基本保持一致的情形下,立柱最大变形量减少了3.69%,最大应力减少了10.53%,一阶固有频率提升了2.22%,最大应力改善最为明显,降低了机床零部件的翘曲、变形风险。正交实验和综合评价法在立柱结构设计上的成功应用,为机床其他关键部件的优化设计提供了参考价值。
In order to improve the static and dynamic performance of the machine tool column, the rib structure of the machine tool column is redesigned. The column models of different stiffened plate structures were analyzed by finite element analysis, and the static and dynamic performance parameters of each column were obtained. The obtained parameters are used to construct an orthogonal experiment table with 3 factors and 4 levels. The data fusion of the 16 sets of parameters in the orthogonal table is carried out through the comprehensive evaluation method. The best combination parameters are obtained for the column with #-shaped rib structure, rib height of 20 mm, and lifting hole diameter of 140 mm. Under the condition that the quality of the optimized column is basically the same, the maximum deformation of the column is reduced by 3.69%, the maximum stress is reduced by 10.53%, and the first-order natural frequency is increased by 2.22%. The maximum stress is improved most obviously, reducing the warpage and deformation risks of machine tool parts. The successful application of orthogonal experiment and comprehensive evaluation method in the column structure design provides reference value for the optimization design of other key parts of the machine tool.
作者
刘政
周俊荣
何灵
王瑞超
李会军
LIU Zheng;ZHOU Junrong;HE Ling;WANG Ruichao;LI Huijun(Department of Intelligent Manufacturing,Wuyi University,Jiangmen 529000,China;Shenzhen Create Century Machinery Co.,Ltd.,Shenzhen 518101,China)
出处
《机械工程师》
2022年第2期69-72,75,共5页
Mechanical Engineer
基金
江门市创新科研团队引进资助项目(2018630100090019844)。
关键词
机床立柱
筋板结构
正交实验
综合评价法
优化
machine tool column
rib structure
orthogonal experiment
comprehensive evaluation method
optimization
