CRANK PRESS FOR LONGERONS STAMPING Russian patent published in 2000 - IPC

FIELD: forge-and-press mechanical engineering. SUBSTANCE: slider coupled to drive by means of actuating mechanism is mounted loosely in frame guides. Actuating mechanism includes slider suspension points located in one plane and represented by hydraulic cylinders, pressure source, compensation cylinders and relief valves. Hydraulic cavities of hydraulic cylinders are coupled to one another, to pressure source and to compensation cylinders by hydraulic lines. Bodies of hydraulic cylinders are coupled to eccentric gears. Compensation cylinders are provided with double-step piston which forms hydraulic and pneumatic cavities. Press includes devices for adjustment of force at every point of slider suspension. Each of devices is essentially supplementary pressure source, auxiliary hydraulic cylinder and proportional control valve. Subpiston cavity of auxiliary cylinder is coupled to hydraulic cavity of corresponding compensation cylinder. Above-piston cavity is coupled to supplementary pressure source by means of hydraulic line. EFFECT: enlarged productive capabilities. 4 dwg