MODE OF FASHIONED MILLING Russian patent published in 2008 - IPC B23C3/32 

FIELD: the invention refers to processing, milling of screw-type oil screw pumps.

SUBSTANCE: the mode is that rotation movement is given to a processing blank and rotation movement and movement of longitudinal feeding are given to a fashioned milling cutter having required fashioned profile in the shape of a turning curve to totality of edges of simple forms of its separate cutting elements. For expanding technological possibilities before operation after grinding and following regrinding the sectional milling cutter is putted together from the packet of disc groove cutters installed and fixed with the aid of a nut on the common slit chuck. At that the number of the disc cutters is chosen even and they have slit openings along the profile reciprocal to the slit profile of the chuck and direct cutting teethes which are received and regrinded in the collection in the packet where the front surfaces of the cutting teethes are located relatively to each other in a circumference direction on the value of one step of the slit joint of disc cutters and the chuck are located in one longitudinal plane. The installation of the disc cutters is adjusted by way of turning relatively to each other on the value of one step of the slit joint of disc cutters and the chuck. AT that the correlation between the quantity of slits of slit joint, the quantity of teethes of the cutter and the even number of disc cutters is defined according to the given formula.

EFFECT: expands technological possibilities.

1 ex, 8 dwg