Die cushion controller of press machine

Details Die cushion controller of press machine Die cushion controller of press machine

2011-03-15

2011-03-15

Nguyen, Jimmy T (Department: 3725)

Metal deforming

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

Sensing tool or tool-linked part

C072S454000

Reexamination Certificate

active

07905126

ABSTRACT:
A die-cushion controlling device includes a position-command-signal outputting section for outputting a position command signal of a die-cushion pad; a position detecting section for detecting a position of the die-cushion pad; a position comparing section for outputting a position deviation signal corresponding to a deviation between a target position value based on the position command signal and a position detection value based on a position detection signal; a position controlling section for outputting a position-speed command signal based on the position deviation signal; a speed controlling section for outputting a motor-current command signal based on the position-speed command signal; a servo amplifier for generating a current corresponding to the motor-current command signal; and an escape-position-command-signal outputting section for outputting a position command signal for commanding the die-cushion pad to escape from a bottom dead center position based on a press signal outputted when a slide has reached a bottom dead center.

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International Preliminary Report on Patentability, Chapter I of the Patent Cooperation Treaty,and Written Opinion dated Sep. 9, 2008 for PCT/JP2007/053476. 5 sheets.

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