PROCEDURE FOR FORMING AT KNEE PRESS WITH HYDRAULIC DRIVE Russian patent published in 2011 - IPC B21J5/02 B21J9/02 B30B1/08 

FIELD: machine building.

SUBSTANCE: knee press consists of bed with cross bars, of poles with guides, of movable parts in form of working slider and of at least one knuckle-joint leverage. The said leverage connects the first cross bar with the working slider. The first lever of the leverage connects the first cross bar with the second lever coupled with the working slider through a slider joint. The press is equipped with at least one hydraulic cylinder movable parts of which are connected with the knuckle-joint mechanism. Stationary parts are secured on the bed. The procedure for knee press forming consists in working cycles containing stages. During the said stages the movable parts of the press are accelerated to accumulate kinetic energy sufficient for deformation of a work piece, deform the work piece and are retracted. Movable parts are accelerated before beginning of work piece deformation when the first lever reaches maximal angular velocity ω_max chosen from given range.

EFFECT: reduced duration of work piece deforming stage.

6 cl, 8 dwg, 2 tbl