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在加工螺距为1.25及1.75毫米等螺纹时,因为车床丝杠螺距被工件螺距去除,所得的数值是带小数的除不尽的值,如果要采用抬起对合螺母手柄退刀的方法加工,往往产生乱扣。如车床无乱扣盘装置,自制乱扣盘又较费事。因此,在加工这类螺纹时,采用低速顺车削法(因为高速时来不及退刀),生产效率低,容易啃刀,表面光洁度低。尤其在加工1 Cr 13、2 Cr13等材料时显得更突出。在加工实践中证实,采用反转切削法能
In the processing of thread pitch of 1.25 and 1.75 mm and other threads, because the lathe lead screw pitch is removed by the workpiece pitch, the resulting value is an inexhaustible value with a decimal, if you want to lift the handle with a nut retracting method of processing, Often generate arbitrary buckle. Such as lathe free buckle disc device, homemade disorderly disc buckle more trouble. Therefore, in the processing of such threads, the use of low-speed car turning method (because of late at high speed retractable), low productivity, easy to chew knife, low surface finish. Especially in the processing 1 Cr 13,2 Cr13 and other materials are more prominent. Confirmed in the processing practice, the use of reverse cutting method can