Ultrasonic Vibration Aided Micro-milling Of Quartz Glass

Due to the excellent performance, hard-brittle materials has been widely used inthe production and practice. However, its low ductility, brittleness and notconductivity makes processing is very difficult, especially the ultra-precisionmachining.Quartz glass as a kind of typical hard-brittle material, play a key role in theconstruction of modern society. Difficult machining feature restricts the applicationdevelopment of quartz glass, study a new method of machining is imperative.In this paper, on the basis of ultrasonic milling, with the method of workpiecevibration and the high-speed motorized spindle and high-precision platform,design aconsummate ultrasonic vibration assisted micro-milling experiment platform,researchon the ultrasonic milling process parameters of quartz glass. According to theprinciples of orthogonal experimental design two experimental arrangements. Bydynamometer in both processing methods of milling force measured using visualanalysis and variance analysis, study spindle speed,feed rate, depth of cut and otherparameters affect the milling force and milling machining quality. To study thechanges in the mechanism of ultrasound milling regional temperature, and analyzedthe conditions for realization of plastic milling by using infrared thermometer.The experimental results shows that in both milling methods, using the sameparameters for milling, milling force and milling zone temperature measured byultrasonic milling always lower than conventional milling. This suggests thatultrasound can effectively reduce milling force and milling temperature. Throughanalysis of milling chips, the chips of ultrasonic milling obtained was found small andcontinuous and distributed evenly machined surface appears very intensive cuttingstripes, ultrasonic machining surface quality is much higher than conventional millingsurface quality. This shows that ultrasonic milling can improve the quality ofmachined surface. The figure of milling force wave shows that the ultrasonic millingpresent sine law，the magnitude of changes is small and uniform, this shows that withthe method of workpiece vibration can achieve very good effect of vibration.Finally, the results of the research show that：ultrasonic vibration milling canachieve plastic milling quartz glass, greatly reduce the milling force and millingtemperature, improve the surface quality, reduced tool wear and extend the tool life.