Gas investigation on laser drilling

Abstract

To drill sub-millimeters holes one of the way is laser drilling. Laser drilling is a well-established industrial process for tens years. However this process doesn’t get well under control. The influence of the inherent factors are not still understood. This article deals with the gas effect on drilling. We investigate the flow of an assist gas without and with a target with the help of a strioscopy set up. By this way, we see the position of the shock waves in the supersonic jet and on target surface. We inspect nature of the metal vapor jet from irradiated target and the influence of these different flows on drilling process.