As an example for machining the helicoid with special shape bythe characteristic machining method, the conical miller withequal helix angle ground by disk typed wheel is shown.

• 并以碟形砂轮加工等螺旋角锥形铣刀刀槽作为加工异型螺旋曲面的实例,对特征加工法的应用予以说明。