Patent ID: 8621908
Filing Date: 2014-01-07
Classification: B21D,G01N

Abstract:
1. A method for determining a quality of a metallic surface of a metallic substrate, comprising the steps of: providing a metallic surface comprising a metallic coating; forming said metallic substrate in an area of a test surface by drawing the metallic substrate in a material-forming tool with a die; adjusting a main shape change during drawing in a first direction via a drawing depth, wherein the main shape change and an additional shape change, in a second direction perpendicular to the first direction, of the metallic substrate in the area of the test surface assume predetermined values that are related to a later utilization of the metallic substrate; wherein the main shape change of the metallic substrate in the area of the test surface is adjusted to a 7% maximum change in the first direction; wherein the additional shape change of the metallic substrate in the area of the test surface is adjusted to between a −2% and a +2% change in the second direction, exclusive of a 0% change in the second direction; abrading the test surface after forming the test surface; and after abrading the test surface, testing the coated metallic surface of the test surface area for surface defects after forming.