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1. (WO2018197579) METHOD AND DEVICE FOR ASCERTAINING THE FLATNESS OF STRIP MATERIAL, AND MACHINING SYSTEM COMPRISING SUCH A DEVICE

Pub. No.:    WO/2018/197579    International Application No.:    PCT/EP2018/060633
Publication Date: Fri Nov 02 00:59:59 CET 2018 International Filing Date: Thu Apr 26 01:59:59 CEST 2018
IPC: B21B 38/02
Applicants: MUHR UND BENDER KG
Inventors: EICHNER, Harald
PRITZ, Stephan
FELDMANN, Andre
MUNDHENKE, Richard
Title: METHOD AND DEVICE FOR ASCERTAINING THE FLATNESS OF STRIP MATERIAL, AND MACHINING SYSTEM COMPRISING SUCH A DEVICE
Abstract:
The invention relates to a method and a device for ascertaining the flatness of transported strip material, having the steps of: moving the strip material (3) through a strip machining device, wherein a tensile force (Fx) of at least 10 N/mm2 is applied to the strip material (3); generating at least one projection pattern (5, 5') in the shape of a projection grid on the surface (6) of the strip material (3) by means of a projection-producing optical system (4, 4'), said projection pattern (5, 5') being projected onto the surface (6) of the strip material (3) from a position (P) which is laterally offset to the central plane (M) of the strip material (3), such that a projection angle (a) formed between the surface (6) of the strip material (3) and a projection beam (9) equals between 1° and 45°; and detecting the projection pattern (5, 5') by means of a camera (7), said camera (7) being arranged on a transverse plane (E) above the strip material (3) when viewed in the movement direction (X).