METHOD FOR MACHINING HOLES WITH INCLINED GENERATRIX Russian patent published in 1994 - IPC

FIELD: machining. SUBSTANCE: hole is made in a part by a cone mill. The cutting in is made along the generatrix of the side on which the hole is brought by its large diameter. The generatrix of the cone mill is set at an angle to the hole axis. The mill is set in rotation around its axis and circular displacement around the hole axis. Moreover, the mill is cut in the part on the side on which the hole is brought by its smaller diameter in the direction which coincides with the tool generatrix. The cutting in on both sides is provided to a depth exceeding half the depth of the hole along the generatrix. EFFECT: improved quality. 2 dwg