基于柔性铰链的新型快速伺服刀架设计

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振动与冲击 ›› 2016, Vol. 35 ›› Issue (13) : 160-166.

论文

基于柔性铰链的新型快速伺服刀架设计

孙涛1 李国平1 娄军强1 邱辉1

作者信息 +

Design of a new fast servo tool based on flexible hinges

Li Guoping1 Sun Tao1 Lou Junqiang1 Qiu Hui1

Author information +

文章历史 +

摘要

针对目前用于非圆精密加工的快速伺服刀架只能提供单向驱动力的问题，设计了一种基于柔性铰链的新型快速伺服刀架。建立了刀具放大结构的力学模型，利用理论力学的知识推导出刀具的放大率、刚度和固有频率解析式，并对实验刀具进行有限元分析。为了验证理论计算和有限元分析结果的准确性，对刀具进行实验测试。测试结果显示，理论计算结果与实验结果的最大误差为14.87％，平均误差为12.635％，有限元分析结果与实验结果的最大误差为6.54％，平均误差为5.925％，表明理论计算和有限元分析的准确性。最后提出了一种快速伺服刀架参数的初选流程，为快速伺服刀架的研究提供一定的理论基础。

Abstract

For the problem of currently fast servo tool(FST) used for non-circular precision machining being only able to provide one-way driving force, a new FST based on flexible hinges was designed. To analyze FST conveniently, the simplified modeling of amplification mechanism of FST was developed, and then magnification ratio, stiffness and natural frequency of FST were deduced according to the knowledge of materials mechanics. Comparing to theoretical calculation, Finite Element Analysis(FEA) has better performance on structural analysis. So FEA were performed to analyze magnification ratio, stiffness and natural frequency of FST . In order to verify the accuracy of the results of the theoretical analysis and FEA, experimental test on static and dynamic behavior of FST were performed. The results show that the maximum error and the average error between theoretical analysis and experimental result are 14.87％and 12.635％, and the maximum error and the average error between FEA and experimental result are 6.54％and5.925％, which verified the accuracy of theoretical analysis and FEA. Finally , a procedure to optimize dimensions of the FST was given, provided a theoretical basis for the study of fast servo tool.

导出引用

孙涛1 李国平1 娄军强1 邱辉1. 基于柔性铰链的新型快速伺服刀架设计[J]. 振动与冲击, 2016, 35(13): 160-166

Li Guoping1 Sun Tao1 Lou Junqiang1 Qiu Hui1. Design of a new fast servo tool based on flexible hinges[J]. Journal of Vibration and Shock, 2016, 35(13): 160-166

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