双曲面麻花钻几何参数与刃磨参数关系探讨

Discussion about relationship between geometric parameters and grinding parameters of hyperboloid twist drill

探讨了目前还没有引起研究人员广泛关注的双曲面麻花钻的几何参数和磨削成型这种钻型所必须的一组刃磨参数。由于该钻型的主刃是双曲面上的曲线,主刃上任一点的锋角都不同,无法代表整个主刃的结构特点。因此用主刃的外缘和横刃转点的锋角作为其设计几何参数值,并以尾隙角为补充参数,建立确定双曲面刃磨参数的一组方程。

Relationship of the geometric parameters and the grinding parameters of the hyperboloid twist drill were discussed deeply. Because the blade of the drill is a curve on the hyperboloid, the point angle at the blade is variable, any one point angle at the blade can not represent the blade design feature. So the point angles at outer corner and chisel edge corner are present as drill design parameters for the unique feature of this type of drill. As relief angle of the drill was used as supplement parameter, a set of equation was established.