FASHIONED CUTTER WITH A FOLLOWING SCHEME OF CUTTING Russian patent published in 2008 - IPC B23C5/14 

FIELD: the invention refers to the field of metal processing, to sectional cutters for processing the profile of a spiral groove of the screws of oil screw pumps.

SUBSTANCE: the cutter has a required fashioned profile in the shape of a turning curve to totality of edges simple by form of separate cutting elements. For expanding technological possibilities it is fulfilled sectional consisting of a packet of disc groove cutters installed and fixed with the aid of a nut on a common slit chuck. At that the number of the disc cutters is chosen even and they have slit openings along the profile responsive to the slit profile of the chuck. At that disc cutters have straight cutting teethes received and regringed in an assembly in the packet where the front surfaces of the cutting teethes are located in one longitudinal plane. In the working condition the disc cutters are shifted relatively to each other in a circular direction on the value of one step of the slit joint of the disc cutters and the chuck, and the correlation between the quantity of slits of the slit joint, the quantity of the teethes of the cutter and the even quantity of the disc cutters is defined according to the given formula.

EFFECT: expands technological possibilities.

2 cl, 1 ex, 8 dwg