Title:
FLUID PRESSURE UNIT AND CONTROL METHOD FOR THE SAME
Document Type and Number:
WIPO Patent Application WO/2006/082711
Kind Code:
A1
Abstract:
A fluid pressure unit and a control method for the fluid pressure unit. The fluid pressure unit (A) comprises a hydraulic pump driven by a motor (2) and a hydraulic cylinder (3) driving a chuck. To simultaneously realize the high-speed operation of the cylinder (3) and a reduction in the surge pressure of the cylinder (3), the fixed displacement type hydraulic pump is combined with the variable speed motor (2) driving the pump. When the cylinder (3) is driven to drive the chuck, a teaching operation is performed to obtain the operating stroke of the cylinder (3) based on the rotational speed of the motor (2), and the motor (2) is rotated at a high rotational speed for operation until the cylinder (3) reaches a pre-set deceleration start position immediately before the end of the operation in the obtained operating stroke and, after the cylinder (3) reaches the deceleration start position, rotated at a low rotational speed for deceleration until the operation is terminated to softly bring the chuck into contact with a work.
Inventors:
OCHI YOSHIYUKI (JP)
OTANI YOSHIMITSU (JP)
NAKAMURA HIROKAZU (JP)
OTANI YOSHIMITSU (JP)
NAKAMURA HIROKAZU (JP)
Application Number:
PCT/JP2006/300759
Publication Date:
August 10, 2006
Filing Date:
January 19, 2006
Export Citation:
Assignee:
DAIKIN IND LTD (JP)
OCHI YOSHIYUKI (JP)
OTANI YOSHIMITSU (JP)
NAKAMURA HIROKAZU (JP)
OCHI YOSHIYUKI (JP)
OTANI YOSHIMITSU (JP)
NAKAMURA HIROKAZU (JP)
International Classes:
B23B31/30; F15B11/04; F15B9/04; G05D3/10
Foreign References:
| JPH11327651A | 1999-11-26 | |||
| JP2005195081A | 2005-07-21 | |||
| JPH06292769A | 1994-10-21 | |||
| JPH067551A | 1994-01-18 | |||
| JP2002188602A | 2002-07-05 | |||
| JPH08309552A | 1996-11-26 | |||
| JPS6374881A | 1988-04-05 | |||
| JPH07237000A | 1995-09-12 | |||
| JP2000337316A | 2000-12-05 | |||
| JPS6298001A | 1987-05-07 | |||
| JPS5431876A | 1979-03-08 | |||
| JPS58102807A | 1983-06-18 | |||
| JP2000039920A | 2000-02-08 | |||
| JPH01172601A | 1989-07-07 | |||
| JP2001090671A | 2001-04-03 |
Other References:
SHITAO S. ET AL.: "NC Senban no Shoene Tajikuji Bunkatsu Atsuryoku Hirei Seigyo System", 18 November 2004, DAIKIN INDUSTRIES, LTD., article "Heisei 16 Nen Shuki Fluid Power System Koenkai (Koen Runbunshu) '4-2 Surge Atsuryoku Teigen Taisaku'", XP003000562
See also references of EP 1793127A4
See also references of EP 1793127A4
Attorney, Agent or Firm:
Maeda, Hiroshi (5-7 Hommachi 2-chome, Chuo-k, Osaka-shi Osaka, JP)
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