金刚石钻磨头超声振动钻磨硬脆材料表面质量的试验研究

硬脆材料以其优良的性能在生产实践中得到了广泛应用，但其低塑性、易脆性及不导电性等使得加工十分困难，尤其是超精密表面制作更加困难。为此，本文将超声振动引入普通钻磨中，介绍了超声振动切削原理，通过超声与普通两种方式下的表面粗糙度试验和微观形貌观察得出以下结沦：1）不同加工参数时，超声振动钻磨时的工件表面粗糙度值均低于普通钻磨时的表面粗糙度值；2）随着进给量、工件转速和输入功率的增加，超声和普通钻磨时的表面粗糙度均呈上升趋势；3）普通钻磨加工后孔壁表面有宽度和间距不均匀的沟槽，并且沟槽较宽，而超声钻磨加工后表面沟槽（划痕）较浅且均匀。

Experimental study on surface quality of hard-brittle materials in ultrasonic vibration drilling and grinding

Hard-brittle materials have been popularly used because of their excellent performances.However,the low plasticity,frangibility and non-conduction make their machining very difficult,especially in ultra-precise surface fabrication.Therefore,in the paper,ultrasonic vibration is introduced to common drilling and grinding,and the principle of ultrasonic vibration cutting is introduced.Through the surface roughness measurement and micro pattern analysis in ultrasonic and common drilling and grinding,we got conclusions as follows: 1).with different machining parameters,the surface roughness value in ultrasonic vibration drilling and grinding is lower than that in common drilling and grinding;2).with the increase of feed speed,rotational speed of workpiece and input power,the surface roughness values in both ultrasonic and common drilling and grinding are improved;3).After common drilling and grinding,there left non-uniform scratches on the hole wall,while after ultrasonic drilling and grinding,the scratches on the hole surface are shallower and uniform.