微进给刀架中位移放大机构的优化设计

基于压电陶瓷驱动的刀具微进给机构是满足精密加工的重要途径,为进一步增加微进给刀架驱动位移,在微进给刀架中增加一种柔性铰链微位移放大机构,增加压电陶瓷驱动器输出位移。该文设计了4种微位移放大机构,理论计算了静态刚度,利用ANSYS软件对4种微位移放大机构进行了建模和有限元数值仿真分析,对比了不同类型的微位移放大机构的放大倍数、负载能力和应力情况等静态特性,为优化设计刀具微进给机构打下良好基础。

Optimized Design of the Displacement Amplification Mechanism of the Micro feeding Tool Holder

The micro feeding tool mechanism based on piezoelectric ceramics driving is an important approach to meet the precision machining requirements. In order to further increase the driving displacement of the micro feeding tool holder,we add a flexible hinges micro displacement amplification mechanism in the micro feeding tool holder,which can amplify the output displacement of piezoelectric ceramic actuator.Four kinds of micro displacement amplification mechanism have designed in this paper, and the theoretical calculation of the static stiffness has been carried out, the modeling and finite element numerical simulation analysis for the four kinds of micro displacement amplification mechanism have also been established and performed by using the ANSYS software.The static characteristics of different types of micro displacement amplification mechanisms, such as magnification, load capacity and stress, hasve been compared, which laid a good foundation for optimizing and designing the micro feeding tool mechanism.