超声ELID 复合磨削磨削力模型研究

以ELID 电解原理为基础,结合超声振动辅助磨削过程中单颗磨粒的运动学分析,建立了超声 ELID 复合磨削条件下的磨削力数学解析模型,并对模型进行了分析和仿真。对模型的分析表明:超声振动改 变了磨粒的运动轨迹,使同等条件下的未变形切屑厚度减小,砂轮的在线电解修整使磨粒始终处于锋锐状态, 而且影响砂轮的实际切削深度,进而对磨削力产生影响。磨削力随着超声振动频率、振幅、电解电压、脉冲比、 电解液电阻率的增大而减小;随着切削深度、工件速度的增大而增大。

Grinding Force Modeling for Ultrasonic ELID Composite Grinding

Based on electrolytic principle and the kinematics analysis for single abrasive grit with ultrasonic vibration, the mathematical model of grinding force for ultrasonic ELID composite grinding is proposed. The analysis and simulation are conducted to the model. The analysis of the model shows that:ultrasonic vibration changes the motion trajectory of the abrasive grains, and the undeformed chip thickness is reduced under the same conditions. The inprocess dressing of grinding wheel maintains the abrasive grits in the fengrui state, but also affects the actual depth of cut of the grinding wheel. All that will impact on the grinding force. The grinding force decreases with the increase of ultrasonic vibration frequency and amplitude, the electrolysis voltage, the pulse ratio, the electrolyte resistivity, and increases as the depth of cut, the workpiece speed increases.