Multifunctional servo crank knuckle-lever press

A multifunctional servo crank knuckle-lever press comprises a servo motor, a crankshaft, a connecting rod, a ram, a sliding block body and a control system, wherein the servo motor is connected with the crankshaft through a speed-reducing mechanism in a driving mode, a crank of the crankshaft is connected with a rotary bearing at the upper end of the connecting rod, the lower end of the connecting rod is hinged to the center of the ram through a bulb screw rod, and the ram is hinged to a symmetrical knuckle lever structure. The symmetrical knuckle lever structure is composed of a triangular connecting rod, an upper knuckle lever and a lower knuckle lever, wherein three angle ends end of the triangular connecting rod are respectively provided with a pin hole, are large semicircular column bodies, and are hinged to semicircular square bearing bushes arranged on an upper knuckle lever and a lower knuckle lever through pin shafts, and the upper knuckle lever and the lower knuckle lever are hinged to an upper support of a machine body and a lower support of the sliding block body respectively. According to the multifunctional servo crank knuckle-lever press, the servo control system controls the servo motor to drive the sliding block to make vertical reciprocating motion operations, different punching curves are achieved through preset control programs according to different processes, and multifunctional punching operations such as blanking, silent punching, tensioning and fine press forming and stamping are carried out.