METHOD FOR MILLING SCREWS WITH CIRCULAR SCREW SURFACE Russian patent published in 2007 - IPC B23C3/00 B23G1/32 

FIELD: manufacturing processes in machine engineering, working screws of screw pumps in lathes, grinders and in working centers.

SUBSTANCE: method comprises steps of imparting rotation to blank and to milling tool; providing rectilinear feed motion of working tool along axis of blank while arranging axis of spindle of working tool by inclination angle coinciding with inclination angle of helical line. In order to enhance efficiency, accuracy and quality of milling, cylindrical milling cutter is used as working tool. Said milling cutter is subjected to additional oscillation motion by means of crank- connecting rod head having crank subjected to rotation matched with rotation of worked blank and connecting rod whose one end is jointly coupled with crank and whose other end is coupled with slide performing rectilinear reciprocation motions. Connecting rod is rigidly joined with fork in which milling cutter with individual main-motion drive is mounted.

EFFECT: enhanced efficiency, accuracy and quality of milling blank.

11 dwg, 1 ex