Characterization of the process control for the direct laser metallic powder deposition (2006)
Bi, G., Gasser, A., Wissenbach, K., Drenker, A., Poprawe, R.
Direct Laser Metallic Powder Deposition Process is one of the most popular direct additive manufacturing processes which use laser as a heat source to deposit the metallic powder layer by layer for...
Bi, G., Gasser, A., Wissenbach, K., Drenker, A., Poprawe, R.
Laser cladding has been successfully introduced into industry for the use in wear and corrosion applications and in the repair work such as turbine components, moulds and dies. Through monitoring and...
Bi, G.J., Gasser, A., Wissenbach, K., Drenker, A., Poprawe, R.
The direct laser metallic powder deposition process was investigated with the aid of a radiant thermometer by building thin walls. The measured infrared (IR) temperature signal showed good...
Drenker, A., Baumann, M., Pirch, N., Sommer, J., Vitr, G., ...
Warpage is a problem that frequently occurs in laser transformation hardening of precision parts. If, for example, the ball bearing tracks of a linear guiding rail are sequentially hardened with a...
Transformation hardening of torsion springs with HPDL (2000)
Drenker, A., Kaierle, S., Schürmann, B., Vitr, G., Wissenbach, K., Dallmeyer, S., ...
Diodenlasersystem mit verstellbarer Leistungsdichteverteilung (1999)
Drenker, A., Bosse, L., Hänsch, D., Schürmann, B., Pütz, H., Treusch, H.G., ...
This paper reports the main results of a research project dealing with the development of a new diode laser system whose intensity distribution can be controlled spatially resolved. In the first part...
Verfahren zur Steuerung der Laserstrahlleistung (1997)
Drenker, A., Geissler, S., Wilbers, B.
The control method involves using a detector (10) for measuring the intensity of the laser beam. The laser output intensity is compared with the required beam intensity (PLs), in order to provide a...
Verfahren zum Bearbeiten von Werkstücken mit Laserstrahlung (1995)
Beyer, E., Abels, P., Maischner, D., Drenker, A.
Process for the machining of workpieces by means of laser radiation, in which the machining process, in particular the weld-in depth or the degree of through-welding are monitored by detecting...
Process control for laser materials processing (1995)
Abels, P., Beyer, E., Drenker, A., Kaierle, S., Kirby, C., Nitsch, H.
Examples of process monitoring and real time process control are given. Considering industrial applications, methods for the detection of process signals are integrated into the beam path to provide...
Process monitoring for laser beam welding and applications (1994)
Kirby, C., Abels, P., Drenker, A., Nitsch, H., Beyer, E.
Tubes and profiles out of steel strips are produced in a lot of small and medium sized enterprises. In order to be able to use the advantages of laser beam welding in industrial manufacturing...
Verfahren zum Bearbeiten von Werkstueckoberflaechen mit Laserstrahlung (1993)
Morgenthal, L., Beyer, E., Drenker, A.
Process for the machining of workpiece surfaces using laser beams for transformation hardening, surface alloying, remelting, by which laser radiation formed in the beam cross-section is focused and...
Vorrichtung zur Messung des zeitlichen Verlaufs der Strahlung von Lasern (1992)
Loosen, P., Sturm, V., Drenker, A.
Device for the measurement of the radiation power of lasers, in particular infrared lasers, comprising a thermal detector which emits a power-related measurement signal. In order to measure rapid...
Drenker, A., Kramer, R., Wissenbach, K.
Process for the radiation of coated workpieces with laser beams, in which the surface temperature of the radiated workpiece area (20), in particular a processing area, is measured. In order to be...
Process control during laser beam welding (1991)
Abels, P., Drenker, A., Maischner, D., Seidel, B., Beyer, E.
It will be shown that there is a correlation between the quality of the weld seam and the degree of full penetration. Two methods of monitoring the degree of full penetration have been developed. One...
New devices for on-line process diagnostics during laser machining (1991)
Bayer, E., Abels, P., Drenker, A., Maischner, D.
Due to the secondary radiation emitting of the interaction zone during laser material processing, it is possible to evaluate the processing result. When carrying out industrial applications, it is...
Adaptive temperature control during transformation hardening with CO2-laser (1991)
Drenker, A., Böggering, L., Wissenbach, K., Beyer, E., Kramer, R.
Temperature-controlled laser transformation hardening is going to be established in industrial manufacturing of workpieces with complex geometries to ensure and increase the quality of the product as...
Werkstoffbearbeitung mit Laserstrahlung. Tl.9. Oberflächenveredelung (1988)
Drenker, A., Gasser, A., Gillner, A., Kreutz, E.W., Pflüger, S., Wissenbach, K., ...
Zunehmend werden die spezifischen Eigenschaften der Laserstrahlung fuer eine gezielte Verbesserung der Oberflaecheneigenschaften verschiedener Werkstoffe hinsichtlich Ermuedung, Verschleiss,...
Process control during laser machining (1988)
Drenker, A., Gatzweiler, W., Wissenbach, K., Beyer, E.
Controlled laser processing is required to improve and ensure the quality of welding and heat treatment. A sensor collects informations from the processing zone and passes them to a controller. The...
Measurement of laser power (1988)
Drenker, A., Sturm, V., Oebels, H., Rühl, F.
Monitoring the temporal behaviour of laser power is necessary for the analysis of physical processes during machining as well as for steering and controlling in industrial applications. A compact...
Diagnostics of high-power laser beams (1988)
Drenker, A., Kramer, R., Strum, V., Herziger, G.
With the increasing use of high-power lasers, especially Co2 lasers, in the field of industrial laser-materials processing numerous application occur, in which diagnostics of laser-beam...