Trennen mit Festkoerperlasern. Feinschneiden mit Festkoerperlasern Abschlussbericht

Abstract

Solid state lasers have been mainly used for spot welding up to now. Recently some work around the cooperation project 'To separate the solid state lasers' is proving the readiness for use of Nd:YAG-lasers for cutting of steels, Al- and Ti-alloys, hardmagnetic and ceramic materials. A description itself when cutting with pulsed Nd:YAG-laser by capturing the signals that are emitted by the process couldn't be found in literature. Therefore examinations are made to find out a better understanding of the ongoing interaction process and to find out signals that enable a process supervision. This is done by using different diagnostic abilities like short time camera, photodiode, spectrometer and pyrometer. Corresponding technology experiments on cutting of steels and non-ferrous-metals that show the dependence of the working result on the different parameters verify the statements of the experiments on process diagnostics. Also they allow the classification of the separation method 'cutting with pulsed ND:YAG-lasers' with regard to different production technologies. The process and therefore within certain limits the working quality could be supervised by the signals that are emitted out of the interaction zone. These are especially the laser radiation that is transmitted through the cut kerf, the intensity of the process glowing and the temperature radiation. The working quality is good to very good with the thermophysical material properties influencing the cutting result. This final report offers many data for the conversion of the results to a user-specific applicatication. (orig.)SIGLEAvailable from TIB Hannover: F95B231+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Forschung und Technologie (BMFT), Bonn (Germany)DEGerman