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:
Feb. 19, 2008
Filed:
Oct. 27, 2005
Kentaro Fujibayashi, Musashino, JP;
Tetsuo Hishikawa, Yamanashi, JP;
Keisuke Tsujikawa, Yamanashi, JP;
Noboru Hirose, Yamanashi, JP;
Kentaro Fujibayashi, Musashino, JP;
Tetsuo Hishikawa, Yamanashi, JP;
Keisuke Tsujikawa, Yamanashi, JP;
Noboru Hirose, Yamanashi, JP;
Fanuc Ltd, Yamanashi, JP;
Abstract
A die cushion controller uses position control to position die cushion members for placement of a metal sheet. A pressing process starts and the upper die is lowered. When a position detector detects a position at which the upper die touches the sheet metal, the die cushion controller switches over from position control to pressure control and applies a preset pressure to the sheet metal. When the position detector detects that the upper die has risen to a preset position, the die cushion controller clears the positional deviation accumulated in position control to zero, then moves the die cushion members to preset positions and holds them there.