Point angles at outer corner and chisel edge corner are proposed to be used as the drill design parameters to determine the type uniquely and the relief angle is used as a supplement parameter. 针对该钻型的特点,提出用钻尖主刃的外缘和横刃转点处的锋角作为其设计参数值。并以尾隙角为补充参数,惟一地确定钻尖的刃磨参数。
The conical grinding method has four grinding parameters, and for three drill point geometric parameters, the lip clearance angle, chisel edge angle and point angle, the flank configuration is not unique. 麻花钻锥面刃磨方法有4个刃磨参数,当给定外缘转点的结构圆周后角、横刃斜角、锋角这3个结构参数时,后刀面的形状并不唯一。