上海彭浦机器厂加工的长螺杆,长达6米,外径70毫米,双头梯形螺纹,螺距20毫米,材料是,外径80毫米,内径40毫米的45号钢无缝钢管,方侧面光洁度要求6。以前车一根,要化48～56小时,光洁度达不到要求。 先进刀具推广队,来到该厂后,该队尹永林同志,针对这个关键,边操作,边介绍,用了11～ Shanghai Peng Pu machine factory processing long screw, up to 6 meters, diameter 70 mm, double-headed trapezoidal thread, pitch 20 mm, the material is, 80 mm in diameter, 40 mm in diameter 45 steel seamless steel pipe, square side finish Request 6. In the past a car, to be 48 to 56 hours, finish less than required. Advanced tool promotion team, came to the plant, the team comrades YIN Yong-lin, for this key, while the operation, while introducing 11 ~