METHOD OF TURNING ANNULAR GROOVES

摘要

FIELD: machine engineering; combined working of inner and outer rotating surfaces, for example of hydraulic cylinder spools. SUBSTANCE: method comprises steps of imparting rotation to blank, axial and cross feeds to blade tool relative to axis of opening has been formed. In process of in-feed of leading cutting edge into surface being worked position of coordinate axis of cutting tool is related with position of cutting wedge relative to surface being working in such a way that values of entering angle and end relief angle remain constant during cross feed of said tool. In order to sustain constant values of end cutting edge angles coordinate axis of cutter is fixed at opposite end of boring bar. Center of carrier rest performs synchronous motion with axis of said boring bar in process of working part and at removal of cutter from cutting zone. Cutting speed for all zones of cross feed remains constant. EFFECT: increased period of combination tool strength life.