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.
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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