MOVABLE PLATE DRIVE DEVICE AND PRESS SLIDE DRIVE DEVICE

WIPO Patent Application WO/2006/075488

A1

A press slide is driven by a composite thrust formed by an electric (servo) motor SM thrust (i.e., thrust from a motor SM via a screw/nut mechanism) and thrust of hydraulic cylinders SYL1, SYL2 supplied with hydraulic oil from a constant high pressure source. A slide control device controls the electric motor SM and hydraulic cylinders SYL1, SYL2 according to the slide position signal and the motor angular velocity signal. The slide control device makes the hydraulic cylinder SYL1 function as a pump during a period when the slide load becomes smaller and makes the constant high voltage source charge hydraulic oil by the thrust transferred from the electric motor SM to the hydraulic cylinder SYL1 via the screw/nut mechanism and the slide.

Kohno, Yasuyuki c/o AIDA ENGINEERING (LTD. 2-10 Ohyama-cho, Sagamihara-sh, Kanagawa 06, 22911, JP)
Somukawa, Minoru c/o AIDA ENGINEERING (LTD. 2-10 Ohyama-cho, Sagamihara-sh, Kanagawa 06, 22911, JP)

PCT/JP2005/023411

July 20, 2006

December 20, 2005

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AIDA ENGINEERING, LTD. (2-10, Ohyama-cho Sagamihara-sh, Kanagawa 06, 22911, JP)
Kohno, Yasuyuki c/o AIDA ENGINEERING (LTD. 2-10 Ohyama-cho, Sagamihara-sh, Kanagawa 06, 22911, JP)
Somukawa, Minoru c/o AIDA ENGINEERING (LTD. 2-10 Ohyama-cho, Sagamihara-sh, Kanagawa 06, 22911, JP)

B30B1/32; B30B1/18; B30B15/00; B30B15/14; B30B15/22

Matsuura, Kenzo (Matsuura & Associates, P.O. Box 176,, Shinjuku Sumitomo Bldg. 39F,, 6-1, Nishi-shinjuku 2-chome, Shinjuku-ku Tokyo, 163-0239, JP)

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