FIELD: process engineering.
SUBSTANCE: invention relates to cutting of fastening threads at NC lathes. Proposed method comprises loading the program of timing rough and finish cutting passes into the machine tool, worn-out insert being used to this end. Male screw is cut by two cutters at a time in rough and finish passes, said cutters being fitted at the article opposed in thread cutting zone in one plane and turned relative to each other through 180 degrees. Finish cutter is shifted half the pitch behind.
EFFECT: higher efficiency, longer life.
2 cl, 2 dwg
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