压电陶瓷驱动微进给刀架结构优化设计与实验研究  

Structural Optimization Design and Experiment Study of Micro-Feeding Tool Holder Driven by Piezoelectric Ceramic

作　　者：李东明[1] 叶红盼 罗姜 李丽[1] LI Dongming;YE Hongpan;LUO Jiang;LI Li(School of Mechanical Engineering,Dalian Jiaotong University,Dalian 116028,China)

机构地区：[1]大连交通大学机械工程学院,辽宁大连116028

出　　处：《大连交通大学学报》2018年第5期20-24,共5页Journal of Dalian Jiaotong University

基　　金：国家自然科学基金资助项目(51575074)

摘　　要：采用对称式微位移缩小机构和柔性铰链相结合,设计了一种基于压电陶瓷驱动的微进给刀架.分析了微进给刀架定位精度的主要影响因素;基于改进的非支配遗传算法,以刚度为目标函数,采用多目标函数法对微进给刀架结构进行尺寸优化.研究结果表明,该刀架结构系统刚度可达到223. 52 N/μm,最大行程达19. 8μm,固有频率为1 219. 4 Hz,重复定位精度为2 nm,实验结果证明经尺寸优化设计的微进给刀架具有高刚度和高定位精度等优点,可以实现机械零部件精密和超精密加工.A micro-feeding tool holder driven by piezoelectric ceramic is designed,combined a symmetrical micro-displacement reduction mechanism with the flexible hinge. The influencing factors of the tool holder positioning accuracy are analyzed. Based on NSGA-Ⅱalgorithm and taking stiffness as the objective function,the multi-objective function method is used to optimize the structural size of the micro-feeding tool holder. The experiment results show that the system stiffness of the tool holder can reach 223. 52 N/μm,the maximum stroke reaches 19. 8 μm,the natural frequency is 1 219. 4 Hz,and the repetitive positioning accuracy is 2 nm. The experiment results confirm that the micro-eeding tool holder designed by size optimization has the advantages of high stiffness and high positioning accuracy,can achieve precision and ultra-precision processing mechanical parts.

关 键 词：微进给刀架 柔性铰链 多目标优化 刚度 

分 类 号：TG659[金属学及工艺—金属切削加工及机床]