论文部分内容阅读
由于耐热材料的物理机械性质及钻削加工特点(钻头强度低,刀刃上每点几何参数及切削速度不同,排屑难,冷却液供给难),耐热材料的钻削性能较差。特别是孔深超过孔径2倍时,钻削生产和钻头的使用寿命明显降低。由于钻削时螺旋槽内堆积切屑,冷却液难进入切削区,钻头温度升高,这是导致钻头很快磨损的主要原因。钻头具有合理的结构及几何参数,是提高钻削生产率的途径之一。
Due to the physical and mechanical properties of heat-resistant materials and the characteristics of drilling (low bit strength, different geometry parameters at each point of the blade and different cutting speeds, difficult chip evacuation and difficult coolant supply), heat-resistant materials have poor drilling performance. Especially when the hole depth is more than 2 times the aperture, the service life of the drilling production and the drill bit is significantly reduced. Due to the accumulation of chips in the spiral groove during drilling, it is difficult for the coolant to enter the cutting zone and the temperature of the drill bit increases, which is the main reason for the drill bit to wear out quickly. Drill has a reasonable structure and geometric parameters, is one way to improve drilling productivity.