我厂在生产中遇到了一种较长的花键主轴,花键规格为:6-φ70db×φ62dc7×16dc4,花键长170mm,主轴全长825mm。我们设计了专用刀具——φ70花键轴组合铣刀(见图1)。经过三年生产实践,使用效果较好,现将设计和使用情况介绍如下。刀具材料W18C_r4V,热处理硬度HR_c63～66,铣刀齿数Z=20,铣刀成组使用。每组铣刀包括左、右铣刀各一把,同一组铣刀角度70°,同 I plant in the production encountered a longer spline spindle, spline specifications: 6-φ70db × φ62dc7 × 16dc4, spline length 170mm, spindle length of 825mm. We designed a special tool - φ70 spline shaft combination cutter (see Figure 1). After three years of production practice, the use of better, now the design and use of the situation are described below. Tool material W18C_r4V, heat treatment hardness HR_c63 ~ 66, milling cutter teeth Z = 20, a group of milling cutter use. Each cutter includes a left and right milling cutter, the same group milling cutter angle of 70 °, with