FOUR-ROLL SHEET BENDING MACHINE Russian patent published in 2008 - IPC B21D5/14 

FIELD: technological processes.

SUBSTANCE: upper, mounted in racks, two sides and one lower roller, the device for provision of correlation of the lower roller with the shaft of the main roll drive for provision of movement of the lower roller in a vertical plane and transmission of a torque from the main roll drive are established on a bed. Back of the lower roller and a back of the shaft of the main roll drive are executed with a rectangular fist. The device for provision of correlation of the lower roller and the shaft of the main roll drive is executed in the form of cardan shaft and contains joints with forks. One of the forks of one joint has a foundation and flanges with a rectangular slot for correlation with the mentioned universal-joint trunnion block of the main roll drive. One of the forks of the second joint has a foundation and flanges with a rectangular slot for correlation with the mentioned universal-joint trunnion block of the lower roller. The second fork of the joint interconnected with the shaft of the main roll drive, has a cylindrical foundation with external splined surface for correlation with available internal splined surface of a foundation of the second fork of the second joint.

EFFECT: reliability increase.

4 dwg