车削玻璃陶瓷的刀具磨损试验研究

Experimental Research on Tool Wear in Turning Glass-ceramic

以刀具磨损体积与材料去除量之比作为刀具体磨损率,并以此作为刀具利用率的评价指标,与传统的刀具磨损曲线对比,证明了用刀具体磨损率评价刀具磨损情况的可行性;通过车削二硅酸锂玻璃陶瓷,研究了切削速度、进给量和切削深度对刀具体磨损率的影响。结果表明:随着切削速度增加,刀具体磨损率先降低后升高;随着进给量增加,刀具体磨损率降低;随着切削深度增加,刀具体磨损率先上升后降低。同时,结合刀具磨损形貌和材料崩碎情况,分析了刀具磨损机理。

The vohnue wear rate of cutting louis was defined as the ratio of tool wear volume to material removal vol- ume,and was taken as anevaluation index for tool utilization. It is feasible by comparing with the traditional wear curve. The influences of cutting speed,feed rate and cutting depth on the volume wear rate were studied by turning lithium disilicate glass-ceramics. The research results indicated that with the increase of cutting speed,the volume wear rate of the cutting toni decreased firstly and then increased. And with the increase of the feed rate, the volume wear rate decreased. And with the increase of Ihe cutting depth,the volume wear rate increased firstly and then decreased. The tool wear mechanism was also analyzed through tool wear morphologies and breakages.