EP 0108718 A3 19840815 - METHOD OF BENDING SHEET METAL WITH A FOLDING PRESS
Title (en)
METHOD OF BENDING SHEET METAL WITH A FOLDING PRESS
Publication
Application
Priority
CH 644082 A 19821105
Abstract (en)
[origin: US4550586A] The device employs a number of detectors (1) mounted at the level of the upper surface of the die (2) and a numerical control system (5). The purpose of the detectors is to signal to the numerical control the moment that the part b of the sheet begins to rise. The device allows the automatic determination of the thickness of the sheet in the area where the bend is to be located, during the course of the forming operation. The thickness of the sheet is then used by a numerical control system to correct the travel of the tool, without interrupting the forming cycle, in such a way as to obtain with high precision the required bend angle.
IPC 1-7
IPC 8 full level
B21D 5/02 (2006.01)
CPC (source: EP US)
B21D 5/006 (2013.01 - EP US); B21D 5/02 (2013.01 - EP US)
Citation (search report)
- DE 2901376 B2 19801030
- DE 1452836 A1 19691030 - PROMECAN SISSON LEHMANN, et al
Designated contracting state (EPC)
BE DE FR GB IT NL SE
DOCDB simple family (publication)
EP 0108718 A2 19840516; EP 0108718 A3 19840815; EP 0108718 B1 19870708; CH 651767 A5 19851015; DE 3372326 D1 19870813; US 4550586 A 19851105
DOCDB simple family (application)
EP 83810486 A 19831021; CH 644082 A 19821105; DE 3372326 T 19831021; US 54764183 A 19831101