ROLL-TYPE SHEET BENDING MACHINE Russian patent published in 1995 - IPC

FIELD: rolling of metal. SUBSTANCE: roll-type machine has upper, lower and side rolls. Elastic rings are uniformly arranged and rigidly secured to the lower roll. a diameter of the rings is more than a diameter of the rolls. At both sides of each ring the roll has annular grooves. Upon bending thick-sheet blanks (more, than 5-16 mm), the lower roll moves upwards and the outer diameters of the elastic rings, being deformed and pressed into the annular grooves of the roll. In the result the outer generatrices of the elastic rings coincide with a generatrix of a working barrel of the roll, and the blank is appeared to be bitted between the lower roll and the upper roll as in the a four-roll machine. EFFECT: enlarged manufacturing possibilities. 1 cl, 4 dwg