Double action oil hydraulic press

Metal deforming – With use of control means energized in response to activator... – Including plural sensors or sensor responsive to comparison...

Reexamination Certificate

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Details

C072S021100, C072S021500, C100S048000, C100S099000, C100S269140

Reexamination Certificate

active

06941783

ABSTRACT:
A double action oil hydraulic press is provided having a main cylinder for actuating a slide and a lower part forming cylinder for actuating a lower part forming unit, wherein the operations of the cylinders are controlled through the combined control of the rotation of an oil hydraulic pump of a power unit and servo valves whereby the amount of operation oil that must be used is reduced. To this end, the press comprises a power unit comprising a variable displacement oil hydraulic pump adapted to be driven by an inverter motor; controllable servo valves provided in hydraulic circuits connecting the power unit to the main cylinder and to the lower part forming cylinder, respectively; servo controllers for controlling the servo valves, respectively; cylinder pressure detecting sensors provided in the hydraulic circuits, respectively; position detecting sensors for sensing positions of the slide and the lower part forming unit, respectively; a control unit for furnishing the inverter motor of the power unit and the servo controllers with control signals, respectively, and means whereby respective sensing signals of the cylinder pressure and position detecting sensors are fed back to the control unit.

REFERENCES:
patent: 5031431 (1991-07-01), Naito
patent: 5823104 (1998-10-01), Beisel et al.
patent: 6379119 (2002-04-01), Truninger
patent: 6520075 (2003-02-01), Shinoda et al.
patent: 6634205 (2003-10-01), Yashima et al.
patent: 2004/0033141 (2004-02-01), Stillhard et al.
patent: 62-009799 (1987-01-01), None
patent: 05-104299 (1993-04-01), None
patent: 2000-265966 (2000-09-01), None
patent: 2001-105187 (2001-04-01), None
patent: 2002-2066799 (2002-03-01), None
patent: WO 01/81027 (2001-11-01), None

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