DRUM-TYPE FLYING SHEARS Russian patent published in 1995 - IPC

FIELD: plastic working of metals. SUBSTANCE: drum-type flying shears have two drums with parallel axes of rotation. Drums are kinematically interconnected. Each drum has surface extending longitudinally of generatrix at an angle relative to it and adapted for attachment of pad and knives having parallelogram-shaped section by screws. Pad and knives have front surfaces with slots having support surfaces and two strikers Above mentioned surface of drum has supporting portion for knife. Supporting surface 14 of pad 15 is made in the form of conical portion with generatrix inclination angle equal to the angle between front surface 10 and rear surface 13 of knives. Radius R of base is determined by mathematical dependence recited in Specifications. EFFECT: simplified construction, enhanced reliability in operation and increased economy by reduced cost of manufacturing and operation of shears. 3 cl, 4 dwg