标准麻花钻的锥磨法开刃,是当前采用的基本开刃方法之一。麻花钻标准推荐,φ15毫米以下钻头开刃后,要得到如下三个角度:顶角2(?)=118°,横刃角ψ≈50°,圆周后角α=11～14°。刃磨时,由于钻头的装夹位置与所形成的这三个角度间的几何关系较复杂,因而在进行开刃夹具设计及实际调整钻头装夹位置之前,有两个理论问题必须解决。这两个问题是: Standard twist drill taper grinding method, is currently using one of the basic method of edging. Twist drill standard recommendation, φ15 mm drill bit below, to get the following three angles: top angle 2 (?) = 118 °, horizontal cutting edge angle ψ ≈ 50 °, the circumferential angle α = 11 ~ 14 °. Sharpening, due to the drill bit clamping position and the formation of these three angles between the complex geometry, and therefore in the design of the cutting edge fixture and the actual adjustment of the drill bit clamping position, there are two theoretical issues to be solved. These two questions are: