The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 30, 2011
Filed:
Sep. 04, 2007
Yasusuke Iwashita, Fujiyoshida, JP;
Tadashi Okita, Fujiyoshida, JP;
Hiroyuki Kawamura, Yamanashi, JP;
Satoshi Ikai, Yamanashi, JP;
Yasusuke Iwashita, Fujiyoshida, JP;
Tadashi Okita, Fujiyoshida, JP;
Hiroyuki Kawamura, Yamanashi, JP;
Satoshi Ikai, Yamanashi, JP;
Fanuc Ltd, Yamanashi, JP;
Komatsu Ltd., Tokyo, JP;
Abstract
A control device, for a servo die cushion, by which the speed of a die cushion is prevented from largely deviating from the speed of a slide, whereby the press force between the slide and the die cushion is not significantly reduced. The control device includes a slide speed detector for detecting the speed of the slide, a die cushion speed detector for detecting the speed of the die cushion, and a die cushion speed commanding part for controlling the speed of the die cushion. When a tentative speed command of the die cushion is largely deviated from the detected slide speed, the command of the die cushion is corrected such that the absolute value thereof does not exceed the value calculated by adding the absolute value of the detected slide speed to a positive constant.