多头螺纹梳刀的设计主要是指对截形半角的计算,这是因为多头螺纹梳刀与普通螺纹梳刀相比,具有较大螺纹升角,使截形半角和截形双曲线都有畸变,尤其截形半角的畸变不可忽略,这里介绍一下截形半角的计算。如图1所示,车头正转,用左旋螺纹梳刀车制右旋外螺纹 Multi-head screwdriver knife design is mainly refers to the calculation of the half-angle of the cut, this is because the multi-head screw comb knife with ordinary thread comb, with a larger thread angle, the truncated half-width and truncated hyperbolas are distorted , Especially the truncated half-angle distortion can not be ignored, here to introduce the truncated half-width calculation. Shown in Figure 1, the front is turning, left-handed thread combing car right-handed male thread