Study On The Mechanism Of High Efficiency Removal Of Ultrasonic-assisted Diamond Flying-cut Nanometer Zirconia Ceramics

Nano-zirconia ceramics has become a national defense,aerospace,modern high-tech industries in the field of indispensable,and pole Potential structural material with melting point and high boiling point,high hardness,at room temperature for the insulator,high temperature conductive and other excellent properties.But it is hard and difficult to process materials for high hardness,poor toughness and other characteristics.At present,the processing of nano-zirconia ceramic parts is still grinding-based.However,this processing method of low efficiency,has been unable to meet the needs of large-scale modern manufacturing manufacturing.In order to solve this problem,this paper focuses on the efficient removal mechanism of ultrasonic-assisted diamond fly-cut nanometer zirconia ceramics based on the principle of ultrasonic-assisted diamond fly-off machining and nano-zirconia ceramics as the workpiece.Specifically carried out the following work:?1?A new type of ultrasonic-assisted diamond fly-cut nanometer zirconia ceramic device was developed and its dynamic characteristics were analyzed.The effect of cutting parameters on the cutting force of diamond cutting and ultrasonic-assisted diamond was studied by using the diamond cutting and ultrasonic-assisted diamond fly-cutting force test.It was verified that the new ultrasonic-assisted diamond cutting system could meet the processing requirements.It is found that the cutting force of the ultrasonic-assisted diamond is smaller than that of the ordinary diamond cutting force under the same machining parameters.The cutting forces of the ultrasonic-assisted diamond fly-off and the ordinary diamond cutting are all along with the spindle speed,cutting depth and feed rate Increase the increase.?2?The theoretical model of the surface roughness of the diamond flying cutting surface and the ultrasonic-assisted diamond flying shear was established respectively.The effects of the cutting parameters on the diamond cutting and ultrasonic-assisted diamond fly-cut nanometer zirconia ceramics were studied by orthogonal experiment.The results show that the surface roughness value of ultrasonic-assisted diamond fly-cut nanometer zirconia ceramics under the same cutting parameters is smaller than that of ordinary diamond fines by nano-zirconia ceramic surface roughness;ultrasonic-assisted diamond fly-off and The roughness values of the surface of nano-zirconia ceramics are increased with the increase of spindle speed,cutting depth and feed rate.?3?Based on the theory of ductile domain,the maximum cutting depth h_max of nano-zirconia ceramics is deduced.Based on the idea of micro-element method,the theoretical model of the removal rate of two kinds of diamond cutting and ultrasonic-assisted diamond fly-The model can be used to increase the cutting depth and increase the feed rate.Selecting the large radius of the tool nose radius can improve the removal rate of diamond flying shear.The effect of cutting parameters on the removal rate of ordinary diamond fly-off and ultrasonic-assisted diamond fly-cut nanometer zirconia ceramics was studied by comparing orthogonal test.It was found that the removal rate of ultrasonic-assisted diamond fly-off under the same cutting parameters was higher than that of ordinary diamond The removal rate of ultrasonic-assisted diamond fly-off and ordinary diamond fly-off decreases with the increase of spindle speed,and tends to be stable after decreasing with the increase of cutting depth and feed rate.