基于切向超声的平面磨削参数有效性研究

Study on effectiveness of plane grinding parameters based on tangential ultrasonic vibration

根据切向超声振动辅助磨削运动简图,分析了砂轮与工件的相对运动关系,建立了单颗磨粒的切削模型,并给出了单颗磨粒切削轨迹方程和运动速度方程。通过分析切向超声振动磨削应用的局限性,建立了不同砂轮线速度下和不同超声振动振幅下的单颗磨粒切削轨迹模型,最终选定出合适的砂轮线速度和超声振动振幅。结果表明：在已知条件下,砂轮线速度在1.25~8m/s之间取值,超声振动振幅在相应范围内取值,切向超声振动对磨削加工作用影响显著。

According to the simulation diagram of ultrasonic vibration assisted grinding along tangential direction,the relative motion between wheel and workpiece was analyzed.By establishing the single grain cutting model,cutting trajectory equation and velocity equation were obtained.Based on the analysis of the limitations of ultrasonic vibration assisted grinding along tangential direction,the single grain cutting trajectory models under different wheel speeds and different ultrasonic vibration amplitudes were established.Finally,the optimal wheel speed and ultrasonic vibration amplitude were calculated.The results showed that ultrasonic vibration along tangential direction had significant influences on grinding processing when wheel speed was between 1.25m/s and 8m/s and ultrasonic vibration amplitude was in the corresponding range.