Patent ID: 7954353
Filing Date: 2011-06-07
Classification: B21D,G01N

Abstract:
1. A device for determining a quality of a metallic surface of a metallic substrate, comprising: a mould, a sheet holder and a die configured to form a metallic substrate to produce a drawn test surface; and an optical and/or opto-electronic device configured to test a metallic surface of the test surface, wherein the die is configured to form in an area of the drawn test surface of a formed metallic substrate a main shape change that amounts to a 7% maximum change in a first direction of the metallic substrate and an additional shape change that amounts to between a −2% and +2% change, excluding a 0% change, in a second direction of the metallic substrate perpendicular to the first direction, wherein the die has a length of at least 400 mm, a width of at least 250 mm, and a front face with a curvature towards the main shape change with a radius of the curvature from 500 to 2000 mm.