弹性磨头气驱主轴的磨抛接触特性研究

Study on Contact Characteristics of Air Spindle With Small Elastic Grinding Tool

针对复杂形状工件磨抛的问题,设计了一种配有弹性磨头的小体积、高转速的气驱主轴。建立了该主轴磨抛加工过程的理论去除函数模型,并通过了试验验证。结果表明,仿真和试验得到的去除函数高度吻合,且均接近高斯型,属于理想的去除函数。在此基础上,采用气驱磨抛主轴与弹性树脂磨头进行了磨抛试验,探究了各个主要工艺参数对工件表面质量的影响。磨抛后工件表面粗糙度Ra由3.588μm降至0.401μm,证明该气驱主轴可用于高精度磨抛,并为复杂形状工件的高速磨抛提供了一定的理论依据。

To solve the problem of grinding complex shaped workpieces, a small volume and high speed air spindle with small elastic grinding tool was designed. The theoretical removal function model of the spindle was established and verified by experiments. The results show that the removal functions obtained by simulation and experiments are highly consistent and close to Gaussian-like shape, which belongs to the ideal removal function. On this basis, the spindle with the elastic resin grinding tool was used for grinding experiments, and the influence of the main process parameters on the surface quality of the workpiece was explored. The surface roughness of the workpiece after grinding decreases from 3.588μm to 0.401μm, which proves that the air spindle can be used for high-precision grinding, and provides theoretical basis for high-speed grinding of complex shaped workpiece.