Die cushion apparatus of press machine

Details Die cushion apparatus of press machine Die cushion apparatus of press machine

2006-01-17

2011-10-18

Tolan, Edward (Department: 3725)

Metal deforming

With means to drive tool

Including pneumatic- or fluid-actuated tool support

C072S351000

Reexamination Certificate

active

08037735

ABSTRACT:
A die cushion apparatus of a press machine in which a discharge opening of a fluid hydraulic pump/motor is directly connected to a pressure chamber on a cushion pressure production side of a fluid hydraulic cylinder and the torque of a rotating shaft of the fluid hydraulic pump/motor is controlled by an electric motor to control a pressure (die cushion pressure) of the pressure chamber on the cushion pressure production side. It is therefore possible to control the die cushion pressure with excellent responsiveness with respect to a die cushion pressure command and prevent occurrence of a surge pressure. The die cushion apparatus also has excellent energy efficiency since energy required for a die cushioning action that a cushion pad receives when effecting die cushioning of a press machine is regenerated as electrical energy through the fluid hydraulic cylinder, fluid hydraulic pump/motor, and electric motor.

REFERENCES:
patent: 3677048 (1972-07-01), Fuchs, Jr.
patent: 5140895 (1992-08-01), Imanishi
patent: 5237916 (1993-08-01), Malashenko
patent: 5299444 (1994-04-01), Kirii et al.
patent: 5339665 (1994-08-01), Yoshikawa
patent: 5435166 (1995-07-01), Sunada
patent: 6085520 (2000-07-01), Kohno
patent: 6205828 (2001-03-01), Nagao et al.
patent: 7197910 (2007-04-01), Kodani
patent: 63-248522 (1988-10-01), None
patent: 4-371326 (1992-12-01), None
patent: 5-7945 (1993-01-01), None
patent: 6-543 (1994-01-01), None
patent: 7-24600 (1995-01-01), None
patent: 8-215899 (1996-08-01), None
patent: 10-166199 (1998-06-01), None
patent: 11-226794 (1999-08-01), None
patent: 2004-100810 (2004-04-01), None

Affiliated with

Also associated with

Rating

Die cushion apparatus of press machine does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Die cushion apparatus of press machine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Die cushion apparatus of press machine will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4275064