可加工陶瓷切削中钻头磨损特性的研究

以硬质合金和高速钢钻头对微晶玻璃可加工陶瓷进行钻削加工,测试主后刀面的磨损宽度,考察刀具磨损特性,通过单因素试验法考察刀具材料、冷却条件、刀具角度等参数对刀具磨损的影响。试验结果表明,刀具材料和冷却方式是影响刀具磨损的主要因素,高速钢刀具不适于微晶玻璃陶瓷的钻削加工,冷却条件对硬质合金刀具磨损的影响较为显著。钻头顶角对刀具磨损率的影响较小。

Wear Characteristic of Twist Drills in Cutting Machinable Ceramics

The machinable Glass-ceramics was drilled with tungstencobalt carbide and high-speed steel drill bits respectively.The wear widths of major flank were measured,and the wear characteristic about twist was analyzed during drilling fluorophlogopite ceramics.The factors of affecting wear of drill bits were studied through single factor test,such as tool materials,cooling condition and tool angles.The test results indicate tool materials and cooling conditions are the major factors to affect wear of drill bits.High-speed steel drill bits are not suitable for drilling fluorophlogopite ceramics.And cooling condition affects wear remarkably.But apex angle affects the tool wear rate slightly.