METHOD FOR WORKING INLET OPENING Russian patent published in 2003 - IPC

FIELD: machine engineering, namely processes for making systems of coordinated openings. SUBSTANCE: method comprises steps of working inlet opening by means of cutting tool in the form of helical drill mounted in tool mandrel rotating around spindle axis; in order to provide high accuracy of coordinates of opening axes, arranging drill axis in mandrel in such a way that it is inclined by angle τ = 90^°-ϕ relative to axis of spindle of machine tool, where ϕ - entering angle of drill; shifting drill apex at spacing L of drill extension from end of mandrel relative to spindle axis by value C = l_1,2+c, where l_1,2 - length of one of main cutting edges of drill, c - shift value of drill for eliminating zones with zero cutting speed; arranging one of main cutting edges of drill in parallel relative to outer surface of worked part. EFFECT: enhanced coordinate accuracy of axes of openings. 2 dwg