摘要
微动平台主要以柔性铰链作为其位移导向机构,但是目前常用的弹片式柔性铰链在作为导向机构时存在严重的应力集中的现象,切口型柔性铰链由于严重的局部变形,在传递较大位移时也会产生很大的应力,而应力太大会严重影响柔性机构的疲劳寿命。运用圆倒角弹片式柔性铰链设计了一维微动平台导向机构,运用卡氏第二定理推导了其导向刚度公式,并研究了导向应力集中系数。通过与有限元分析的对比,导向刚度计算公式的最大误差为2.57%,导向应力集中系数的最大误差为1.7%。
Flexure hinges were mainly used as displacement guiding mechanism for micro-motion stage. However, the leaf type flexure hinges cause obvious stress concentration characteristics and notch type flexure hinges produce great stress when transferring large displacement for serious local deformation when be used for guiding mechanism. Large stress seriously affects the fatigue life of flexible mechanism. One dimensional micro platform guiding mechanism is designed based on round fillet leaf spring flexure hinge. The guiding stiffness expression is deduced and guiding stress concentration factor is studied. Compared to FEA results, the maximum error of guide stiffness formula is 2.57%, and the maximum error of guided stress concentration factor is 1.7%.
作者
李瑞奇
杨志军
LI Rui-qi;YANG Zhi-jun(School of Mechanical and Electrical Engineering,Guangdong University of Technology,Guangdong Guanghzou 510006,China)
出处
《机械设计与制造》
北大核心
2018年第12期89-91,95,共4页
Machinery Design & Manufacture
基金
广东省自然科学基金项目(2015A030312008)
广东省科技计划项目(2015B010104006)
关键词
微动平台
柔性铰链
导向刚度
应力集中系数
Micro-Motion Stage
Flexure Hinge
Guiding Stiffness
Stress Concentration Factors
