新型平面四爪微夹持器的设计与分析  

Design and Analysis of a Novel In-Plane Four Claws Micro gripper

作　　者：尹磊 唐军[1] 陈庭辉 YIN Lei;TANG Jun;CHEN Ting-hui(School of Mechanical ＆ Electrical Engineering, Jiangxi University of Science and Technology, Ganzhou Jian- gxi 341000, China)

机构地区：[1]江西理工大学机电工程学院,江西赣州341000

出　　处：《组合机床与自动化加工技术》2018年第5期143-145,150,共4页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：国家自然科学基金资助项目(51104067;51565016)

摘　　要：针对微夹持器在夹持操作过程中的不稳定夹持问题,采用桥式放大及杠杆放大原理设计了一种新型的微夹持器,该夹持器由一个驱动器进行驱动4个夹持臂来实现对夹持目标的四点夹持接触,具有较好的夹持稳定性和较快的夹持响应速度。文中建立了该夹持器的几何和数学模型,并进行了理论分析,同时使用有限元软件Ansysworkbench对其模型进行了仿真计算。结果表明其放大倍数约为7.3倍,固有频率为278.63Hz,最大应力为359.07MPa。经比较,理论值与仿真结果误差为4.2%,达到设计要求。Aiming at the unstable clamping problem of the microgripper during the clamping operation,a new type of micro-gripper is designed by using the principle of bridge amplification and lever amplification,the gripper is driven by a drive four clamping arm to achieve the clamping target of four-point clamp contact,with better clamping stability and faster clamping response speed.In this paper,the geometrical and mathematical model of the gripper is established,and the theoretical analysis is carried out,and the model is simulated by using the finite element software Ansysworkbench.The results show that the magnification is about 7.3 times,the natural frequency is 278.63 Hz,and the maximum stress is 359.07 MPa.By comparison,the theoretical value and simulation result error is 4.2%,which achieves the design requirement.

关 键 词：微夹持器 放大倍数 固有频率 

分 类 号：TH703[机械工程—仪器科学与技术] TG65[机械工程—精密仪器及机械]