Automated billet surface inspection

Abstract

High quality aluminum billet casting requires a very good control of the process parameters. After removing the billets from the casting pit, two quality control inspections are usually performed. A first one is usually performed by an inspector for the surface and shape quality of the billet and a second one for its internal structure using ultrasonic technology. STAS has recently implemented, in a cast house in Canada, a new equipment named the “BSI3D” for Billet Surface Inspection in 3D. This equipment is fully automated and uses state-of-the-art proven 3D scanning and image analysis technologies. The BSI3D is a fully objective and consistent machine that can detect and record the surface defects characteristics. It is also programmed to precisely evaluate the bending of the billets i.e. straightness. This new equipment allows for optimization of the casting process, helps to improve the billet recovery rate and reduces overall operating costs. This paper presents an overview of this equipment, its performances and benefits.