我厂五车间加工M20×3盲孔圆形牙螺纹,因螺纹牙形呈圆弧形,所以车刀刃磨困难,生产效率低、质量差。为了改进加工工艺,五车间的同志经过多次试验,革新成功了加工各种形状内外螺纹的铣削器(附图),经生产实践证明,效果良好。原理:这种铣削器的刀具为螺纹梳刀,它的螺纹牙形不是沿着螺旋线制成的,而是沿着铣刀轴线相垂直的环形线。用螺纹梳刀和螺纹铣削器加工螺纹,工件绕它自己的轴线慢慢转动,螺纹梳刀则转 I plant five workshops M20 × 3 blind hole circular thread, because the thread profile was arc-shaped, so the lathe grinding hard, low productivity, poor quality. In order to improve the processing technology, five workshops comrades after many trials, the successful reform of the processing of various shapes of internal and external thread milling device (with photos), the production proved to be effective. Principle: The cutter for this mill is a thread comb, whose thread profile is not made along a helix but perpendicular to the milling cutter axis. With thread combs and thread mills to machine threads, the workpiece slowly turns around its own axis, and the thread comb turns