Research on Ultrasonic Vibration Grinding of the Hard and Brittle Materials

摘要

It is well known that grinding techniques are main methods to machine hard and brittle materials such as engineering ceramics. But the conventional grinding has many shortcomings such as poorer surface finish,quicker wear and tear of grinding tools,lower effi-ciency and so on. Ultrasonic vibration grinding (UVG) which combines ultrasonic machining and grinding emerged as a developing and promising technique in recent years. In this paper,experimental studies on UVG were conducted on several kinds of hard and brittle material by altering processing parameters such as vibration frequency and its amplitude,diamond abrasive grit size,cutting depth,feeding speed and rotary speed of tools. The experimental results show that alteration in any of above mentioned parameters will bring effects on the processed surface finish of these materials. Of them,the diamond abrasive grit size has the greatest. Moreover,conven-tional grinding experiments were also carried out on these materials. By comparison,it was found that the UVG is superior to the con-ventional method in terms of the ground surface quality,the working efficiency and the wear rate of tools.