超声振动辅助磨削NdFeB永磁材料磨削力试验研究

The grinding force of ultrasonic vibration assisted grinding NdFeB permanent magnetic material

磨削过程中,降低磨削力有利于提高硬脆材料的加工表面质量。对切向、径向和轴向超声振动辅助磨削NdFeB永磁材料的磨削力进行了试验研究,研究结果表明:超声振动的引入使磨削力随砂轮粒度和磨削用量变化的趋势减缓;与普通磨削相比较,三种超声振动方式均使磨削力降低,对于切向磨削力,轴向超声振动使之大幅度上升,切向超声振动次之,而径向超声振动使之下降;对于法向磨削力,三种超声振动方式均使之大幅降低,其中径向超声振动的影响最为明显,切向超声振动次之,轴向超声振动的影响最弱。

Decrease of grinding force is helpful to improve the machine surface quality of the hardbrittle materials during the grinding process.Based on the tangential,normal and axial ultrasonic vibration assisted grinding mode,the grinding force experiments were conducted.The experiments results of grinding force show that the ultrasonic vibration modes weaken the influences of diamond grit size and the grinding parameters on grinding forces.The grinding force in ultrasonic vibration assisted grinding is lower than that in conventional grinding under the same machining condition.The axial ultrasonic vibration leads to a great increase of the tangential grinding force,and the tangential ultrasonic vibration takes second place,while the tangential grinding force decreases because of the normal ultrasonic vibration.The normal ultrasonic vibration makes the normal grinding force decreases the most,the tangential ultrasonic vibration takes the second place,and the axial ultrasonic vibration is the last.