KNUCKLE-JOINT PRESS WITH HYDRAULIC DRIVE Russian patent published in 2011 - IPC B21J9/02 B30B1/08 

FIELD: machine building.

SUBSTANCE: press consists of a bed with a first and second cross bars and poles. A working slider dividing space between the cross bars is installed in guides of the poles. A punch is positioned in first space between the first cross bar and the slider. A knuckle-joint mechanism with the first lever is located in second space between the second cross bar and the slider. The first arm of the said lever is connected with the second lever through a knee hinge. The hydraulic drive has at least one hydraulic cylinder. Movable parts of the hydraulic cylinder are connected with the second arm of the first lever by means of an additional slider and a link with a hinge. The additional slider is installed movably in additional guides parallel to the guides of the working slider. The link is arranged movably relative to the additional slider and perpendicular to its guides.

EFFECT: accumulation of kinetic energy sufficient for work piece deformation for a short time of punch contact with it.

9 cl, 5 dwg, 3 tbl