EXPERIMENTAL INVESTIGATIONS OF ADVANCED CERAMICS IN HIGH EFFICIENCY DEEP GRINDING

XIE Guizhi¹ HUANG Hongwu² HUANG Han^{1, 3} SHENG Xiaomin¹ MI Haiqing¹ XIONG Wanli¹

(1. National Engineering Research Center for High Efficiency Grinding, Hunan University, Changsha 410082;

2. Department of Machinery, Xiamen University of Technology, Xiamen 361005;

3. School of Engineering, The University of Queensland, Brisbane, QLD 4072, Australia )

Abstract: In order to improve machining efficiency and grinding surface integrality of advanced ceramics, the effect of different grinding conditions (different wheel speed, different depth of cut or different feed rate) on surface characteristics, grinding force, specific grinding energy and material remove modes of advanced ceramics, including alumina, nitride silicon and yttria partially stabilized zirconia, are studied under high efficiency deep grinding condition. Special grinding efficiency and depth of cut arrive at 120 mm3/(mm•s) and 6 mm respectively. Experiments indicate that the increase in wheel speed and decrease in depth of cut, i.e., decrease in maximum undeformed chip thickness, result in decrease in specific grinding force, increase in specific grinding energy and plough striations. It is shown that the grinding efficiency increases and the surface integrality does not become worse under grinding condition of great depth of cut.

Key words: High efficiency deep grinding Advanced ceramics Surface characteristics Grinding force Specific grinding energy

CLC No: TH16

国家自然科学基金(50475054)和教育部科学技术研究(10421)资助项目. Received 20060218,  received in revised form 20060828