Control of transient processes during CO2-laser beam welding

Andreas Otto; Guenter Deinzer; Manfred Geiger

doi:10.1117/12.184735

7 September 1994 Control of transient processes during CO₂ laser beam welding

Andreas Otto, Guenter Deinzer, Manfred Geiger

Proceedings Volume 2207, Laser Materials Processing: Industrial and Microelectronics Applications; (1994) https://doi.org/10.1117/12.184735
Event: Europto High Power Lasers and Laser Applications V, 1994, Vienna, Austria

Abstract

During welding of sheet metals with high performance CO2-lasers various unsteady processes occur which are disturbing the performance capabilities ofthe workpiece. Figure 1 gives a schematic overview on different kinds of these transient processes. They take place at the beginning (pos. 1) and the end of the process (pos. 4) as well as at critical workpiece contours (pos. 3). This kind of l;ransient processes can be predicted and therefore it is possible to take them into consideration while plaiiniiig the machining. But also during quasi steady periods (pos. 2) of the welding transient processes occur, that are caused e.g. by changes in the surface finish or by fluctuations of the laser output OWCF or only by the coupling of nonlinear effects. The latter kind of transient processes cannot be predicted. Therefore a highly precise local machining quality can only be achieved, if the transient process is well understood and controlled. Detector systems are required to get a deeper knowledge of the process. To influence the processing results a modular control system has been developed

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Andreas Otto, Guenter Deinzer, and Manfred Geiger "Control of transient processes during CO₂ laser beam welding", Proc. SPIE 2207, Laser Materials Processing: Industrial and Microelectronics Applications, (7 September 1994); https://doi.org/10.1117/12.184735

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