Die cushion mechanism, and apparatus and method for...

Details Die cushion mechanism, and apparatus and method for... Die cushion mechanism, and apparatus and method for...

2005-11-03

2009-12-15

Ross, Dana (Department: 3725)

Metal deforming

With use of control means energized in response to activator...

Sensing tool or tool-linked part

C072S454000, C072S021400

Reexamination Certificate

active

07631528

ABSTRACT:
A control apparatus for controlling a die cushion mechanism including a servo-motor as a drive source and producing a force adapted to be applied outside. The control apparatus includes a force commanding section for commanding a force to be produced by the die cushion mechanism; a force detecting section for detecting a force produced by the die cushion mechanism; a force controlling section for executing a force control on the servo-motor, based on a force command value commanded by the force commanding section and a force detected value detected by the force detecting section; and an abnormality preventing section for preventing, in association with a control state of the servo-motor, the die cushion mechanism from producing an abnormal force.

REFERENCES:
patent: 5435166 (1995-07-01), Sunada
patent: 5701811 (1997-12-01), Kawakami
patent: 2003/0066323 (2003-04-01), Teraoka
patent: 0 569 603 (1992-11-01), None
patent: 3-81099 (1991-04-01), None
patent: 4-55100 (1992-02-01), None
patent: 8-300058 (1996-11-01), None
patent: 10-202327 (1998-08-01), None
patent: 2000-035845 (2000-02-01), None
patent: 2004-017122 (2004-01-01), None
patent: 2004-174558 (2004-06-01), None
European Search Report mailed Apr. 7, 2008 issued in EP Application No. 05023983.9.
Japanese Notice of Reasons for Rejection dated Apr. 1, 2008 issued in JP Application No. 2004-321203 (including a partial translation thereof).

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