Surface smoothness checking method for sheet metal components, especially automotive bodywork components, involves determining surface normals for actual and design surfaces at same point and measuring angle between them

摘要

Method for detecting surface smoothness faults, such as bulges, dents or corrugations in sheet metal components, whereby an actual contour of the component is compared with a design contour in that at selected surface points the surface normal is determined and compared between the actual and design surface. The difference between the directions of the normals acts as a measure of a surface smoothness fault.