工程陶瓷材料高效深磨的试验研究

EXPERIMENTAL INVESTIGATIONS OF ADVANCED CERAMICS IN HIGH EFFICIENCY DEEP GRINDING

针对如何提高工程陶瓷加工效率,改善陶瓷零件的表面质量这一问题,对氧化锆、氮化硅和氧化铝三种陶瓷材料进行高效深磨的试验研究。单位砂轮宽度磨除率达120mm3/(mm·s),最大磨削深度为6mm。在此试验的基础上,对不同砂轮线速度、磨削深度和工件进给速度对陶瓷材料的磨削表面状况、磨削力、比磨削能和去除方式的影响进行研究。结果表明:随着砂轮线速度增加,磨削深度减小,将导致最大未变形切削厚度减小,单位面积磨削力减小,比磨削能增加,磨削表面的塑性痕迹增加,脆性断裂痕迹减少。在陶瓷材料的高速超高速磨削中采用较大切深,能提高磨削效率且表面质量变化不大。

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 mm^3/（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.