Experimental Analysis on Characteristic of the Magnetostrictive Cutting Process Tool-post
超磁致伸缩车削加工刀架特性实验分析

In this paper,the experimental analysis on characteristic of the magnetostrictive cutting toolpost under different prestress and intensity of current is investigated with grating micro-measuring linear encoder and the self-developed optimal magnetostrictive tool-post.The prestress and current in the experiments are controlled by the pressure sensor and the displacement sensor respectively.The displacements measured by the grating micro-measuring linear encoder are recorded by the data gathering system.The experimental results indicate that in different prestress the magnitude of magnetostriction increases with the current increasing.However,the magnitude of magnetostricion decreases with the increase of the prestress when the prestress reaches to a certain magnitude.The fitting curve and the function expression between the prestress and magnetostriction under the maximum current is achieved with the method of curve fitting and linear regressing,and the optimal working prestress is confirmed.From the analysis on the experimental data under the optimal working prestress,the function expression between the current and magnetostriction is proposed.According to the error analysis,the theoretical analysis consists well with the experimental results.