圧電素子による工作機械の熱変形補正に関する研究 : 温度勾配による相対変位の予測

概要

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This paper describes a thermal deformation compensation of machine tools by piezo-electric element. We made the machine model in which the piezo-electric element is joined in the machine construction parts, in order to compensate the influence on cutting accuracy, which is caused by the thermal deformation of machine tools. by measuring the surface temperature at specific place of the machine model the difference of temperature gradient is, obtained ; the relative displacement is predicted in cutting area ; the compensation system of thermal deformation is constructed by loading the proper voltage on the piezo-electric element. Those are proved by the experiment. As the result, by measuring the surface temperature at two specific places of the machine model, experimental equation to predict relative displacement can be yielded, where is used by compensation coefficient decided by the machine shape and the material characteristics. On the other hand, by giving the pre-load to piezo-electric element for added actuator, the hysteresis ignores because the voltage is loaded only in compensating. By predicting the relative displacement in cutting area by this experimental equation, it is shown to be able to compensate the thermal deformation.
公益社団法人精密工学会の論文
1990-04-05