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:
Dec. 21, 1999
Filed:
Aug. 10, 1998
Komatsu, Ltd., Tokyo, JP;
Abstract
For the purpose of making it possible to estimate the spring back angle and/or final driving position of the driving die with good accuracy even if there are some variations from lot to lot in the material characteristics values, and thereby achieve bending with extremely high angle accuracy, the actual bending angle is directed at no less than two provisional driving positions of the driving die during the bending of a workpiece. Based on the relationship of the amount of change in the driving amount to the amount of change in the actual bending angle relating to those provisional driving positions, a determination is made of the relationship of the spring back angle to the target bending angle of the workpiece for the respective working conditions of the bending concerned which are stored in advance. From this relationship, a determination is made for the final driving position of the driving die, and the driving die is driven to that determined final driving position.