ROLL TYPE SHEET BENDING MACHINE Russian patent published in 2004 - IPC

FIELD: plastic metal working by drawing blank between rolls of sheet bending machine. SUBSTANCE: machine includes upper cylindrical roll with bearing units mounted in frame on struts; two lower rolls; guiding abutment for blank in the form of ring sector; unit for clamping larger edge of blank. One bearing unit is mounted with possibility of vertical motion for providing inclination angle of upper cylindrical roll relative to lower rolls in vertical plane towards guiding abutment. On non-working surface of upper cylindrical roll there is body with groove in which guiding abutment for blank is mounted. Unit for clamping larger edge of blank is in the form of metallic rings with outer cone surface mounted on upper cylindrical roll and arranged at side of the largest metallic ring and mutually joined by means of tightening members of rigid ring-halves for limiting lengthwise motion of metallic rings. Inclination angle of outer cone surface of metallic rings is equal to inclination angle of upper cylindrical roll. EFFECT: enhanced efficiency of machine, improved quality of cone shells. 3 dwg