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哈尔滨第一工具厂工人刘明善同志,创造性地改进成功一种一刀车成螺纹的螺纹车刀。用这种车刀车螺纹,改变了过去用普通车刀车螺纹须要来回进刀各8~12次的情况,生产效率很高,车一个工件只要6~7秒。因而它很受车间工人的欢迎。车刀的几何形状如附图所示,几何角度基本上跟普通螺纹车刀相同,只是在车刀的前面修磨成3.5~6°的角度(如A向视图),并在刃磨后用油石把刃口修磨出
Comrade Liu Mingshan, worker of Harbin No.1 Tool Factory, creatively improved the success of a screwdriver with a lathe thread. With this lathe thread, changing the past with ordinary lathe thread back and forth knife each 8 to 12 times the case of high productivity, a car as long as 6 to 7 seconds. So it is very popular with workshop workers. The geometric shape of the turning tool is shown in the attached drawing. The geometric angle is basically the same as that of an ordinary thread turning tool except that it is sharpened to an angle of 3.5 to 6 ° in front of the turning tool (as viewed in the A direction) and sharpened Whetstone grinding edge out