UNIVERSAL CUTTING BLADE Russian patent published in 2007 - IPC B23D17/06 B23D29/00 

FIELD: plastic working of metals, possibly cutting sheet, shaped and rod materials, tubes.

SUBSTANCE: cutting blade includes hydraulic cylinder, control unit, two cutters mounted with possibility of rotation one towards other in common axle and having shaped cutting edges. Each cutting edge has cutting band tapered by angle 2 - 4° and having width consisting of 8 - 10% of cutter thickness and slope adjacent to said band and formed along remaining thickness of cutter. Each cutting edge has two crescent like cutouts mutually joined through bridge consisting of 10 - 20% of cutter thickness. Radius of inner crescent like cutout consists of 20 - 30% of radius of outer crescent like cutout. Cutting edge in crescent like cutouts is tapered by angle 40 - 50° and in bridge it is tapered by angle 50 - 56°.

EFFECT: enhanced efficiency of cutting due to distributing cutting edge for two crescent-like cutouts and due to using optimum configuration of cutting edge.

5 dwg, 1 ex