Movable plate drive device and press slide drive device

Details Movable plate drive device and press slide drive device Movable plate drive device and press slide drive device

2005-12-20

2008-07-22

Nguyen, Jimmy T (Department: 3725)

Presses

Reciprocating press construction

With mechanical force multiplier

C100S048000, C100S269120, C100S269140, C100S270000, C100S290000

Reexamination Certificate

active

07401548

ABSTRACT:
A slide of a press machine is driven by composite thrust of thrust of an electric (servo) motor SM (via a screw
ut mechanism from the electric motor) and thrust of hydraulic cylinders SYL1, SYL2to which pressure oil is supplied from a constant, high pressure source. A slide control device controls the electric motor SM and the hydraulic cylinders SYL1, SYL2, based on a slide position signal and a motor angular velocity signal, and at the same time, makes the hydraulic cylinder SYL1work as a pump during a period when slide load is small, charging pressure oil to the constant, high pressure source by using the thrust transferred from the electric motor to the hydraulic cylinder SYL1through the screw
ut mechanism and the slide.

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