Hard alloy cutting tools are widely used in high-end manufacturing industries such as aerospace,automotive and metallurgy.The production of hard alloy cutting tools is usually completed by grinding with diamond grinding wheels,so the grinding process parameters of the grinding wheel have a significant effect on the quality of the finished tool.In this ex-periment,the cemented carbide fried dough twists drill is machined by varying the linear speed and feed rate of the grinding wheel.After the machining is completed,the grinding surface and sub-surface of the drill are detected by using a super depth microscope,a white light interferometer and a scanning electron microscope.The influence of the grinding wheel feed speed and linear speed on the machining damage is analysed.The results show that the larger the feed speed and linear speed of the grinding wheel,the larger the sawtooth amount.When the linear speed and feed speed are small,the main cut-ting edge of the drill is prone to microchipping phenomenon,the higher the feed speed of the grinding wheel is,the greater the surface roughness of the back surface of the drill is.The higher the linear speed of the grinding wheel is,the smaller the surface roughness of the rear surface of the drill bit is.The maximum damage width of the sub-surface on the rear surface of the drill bit decreases with increasing linear speed.When the linear speed is 30m/s and the feed speed is 160mm/min,the grinding damage of the drill bit is the smallest.
关键词
磨削工艺参数/硬质合金刀具/表面质量/亚表面质量
Key words
grinding process parameter/carbide tool/surface quality/sub-surface quality
维普
万方数据