METHOD FOR WORKING SCREWS OF GERATOR SCREW PUMPS Russian patent published in 2003 - IPC

FIELD: machine engineering, working in lathes. SUBSTANCE: method comprises steps of rotating worked part and cutting tool and realizing rectilinear feed motion of cutting tool along axis of worked part; performing working by means of end surface and partially by lateral surface of cutting tool whose spindle axis is inclined by acute angle ε relative to straight line normal to part rotation axis; determining value of said angle according to formula given in description of invention; imparting to tool planetary motion matched with its rectilinear feed motion at condition of moving spindle axis around said straight line normal relative to part axis. EFFECT: enlarged manufacturing possibilities, enhanced efficiency and quality of working. 3 dwg