Friction and Wear Behavior of Deep Drawing Tools Using Volatile Lubricants Injected Through Laser-Drilled Micro-Holes

Abstract In deep drawing processes, the use of lubricants is mandatory in order to prevent wear on tools and surface damage formed sheet metal components. Here, frequently used are synthetic mineral oils, emulsions, waxes. However, these conventional have be applied material prior forming operation removed afterwards by cleaning processes. Additionally, often contain substances that harmful environment human health. To counteract economic ecological disadvantages, research currently being conducted a novel tribological system. For this, volatile media such as liquid carbon dioxide gaseous nitrogen used, introduced directly into friction zones between tool during under high pressure through special laser-drilled micro-holes. This paper covers latest investigations findings regarding design flow-optimized micro-holes, laser drilling process, characterization radii, expected when using lubrication medium CO 2 .