Various process monitoring approaches of transparent thermoplastics laser beam welding (2008)
Abels, P., Roesner, A., Kaierle, S., Mann, S., Olowinsky, A., Matsuo, N., ...
Main focus of this contribution is an investigation on process monitoring methods for transparent thermoplastic film laser beam welding. Target is to find feasible approaches to monitor and control...
Absorber-free laser beam welding of transparent thermoplastics (2008)
Roesner, A., Abels, P., Olowinsky, A., Matsuo, N., Hino, A.
The laser welding of thermoplastics has been established in several industrial applications, but it has not yet been able to weld transparent thermoplastics without an IR-absorber. However, by the...
High speed video-based melt pool surveillance in laser spot welding (2008)
Stache, N.C., Dieckelmann, J., Firnich, R., Gedicke, J., Abels, P., Olowinsky, A., ...
Verfahren zum Schneiden von zu fuegenden Bauteilen mit Laserstrahlung (2007)
Schulz, W., Michel, J., Abels, P., Alber, G., Neubert, J., Behr, F., ...
WO 200272304 A UPAB: 20021022 NOVELTY - The cutting method has a computer-controlled handling system for the laser cutting beam, for guiding it along a defined cutting path corresponding to a curved...
Regaard, B., Moalem, A., Michel, J., Abels, P., Kaierle, S., Schulz, W.
WO 2006094488 A1 UPAB: 20061121 NOVELTY - A method for setting out the phase limits/boundaries of a workpiece requires, during processing, a processing zone (13) comprising an incidence hit location...
Verfahren und Vorrichtung zum Bearbeiten von Werkstuecken mit Hochenergiestrahlung (2005)
Kratzsch, C., Kaierle, S., Abels, P.
DE 19852302 A UPAB: 20000811 NOVELTY - The light radiation for monitoring the process and the reflected measured light are detected using a machining lens. DETAILED DESCRIPTION - Process for...
Process monitoring and control for laser materials processing - an overview (2005)
Kaierle, S., Abels, P., Kratzsch, C.
In laser beam materials processing, the high demands on the quality of the produced parts can only be guaranteed by a continuous supervision of the manufacturing process and by control of specific...
Failure recognition and online processing control in laser beam welding (2003)
Böske, L., Kreutz, E.W., Petereit, J., Abels, P., Kaierle, S., Kratzsch, C.
By means of ISO 9000 and other by law enforced rules the manufacturing industry is forced to document and control the quality of their products. With the aim to improve the quality of the...
Correlation of process monitoring with x-ray observation of CO2 laser beam welding (2003)
Abels, P., Fujinaga, S., Kaierle, S., Katayama, S., Kratzsch, C., Matsunawa, A., ...
Former investigations have shown that the reliability of process monitoring in laser materials applications can significantly be increased by using a camera system with a two-dimensional spatial...
Failure recognition and online process control in laser beam welding (2002)
Petereit, J., Abels, P., Kaierle, S., Kratzsch, C., Kreutz, E.W.
New advances in process control for laser materials processing (2001)
Kratzsch, C., Abels, P., Kaierle, S., Poprawe, R., Schulz, W.
Laser beam materials processing requires both, high quality output as well as reliable monitoring actions for each processed part. The process diagnostic device commonly used in actual quality...
New advances in process control for automotive laser applications (2001)
Kaierle, S., Abels, P., Kratzsch, C., Michel, J., Schulz, W., Poprawe, R.
By means of ISO 9000 and other by law enforced rules the manufacturing industry is forced to document and control the quality of their products. With the aim to improve the quality of the...
State of the art and new advances in process control for laser materials processing (2001)
Kaierle, S., Abels, P., Kapper, G., Kratzsch, C., Michel, J., Schulz, W., ...
In laser beam materials processing, the high demands on the quality of the produced parts can only be guaranteed by a continuous supervision of the manufacturing process and by control of specific...
Modelling, dynamical simulation and online monitoring in laser beam welding (2001)
Schulz, W., Michel, J., Niessen, M., Kostrykin, V., Abels, P., Kaierle, S.
Efficient and high quality processing requires identification of the underlying phenomena and on-line monitoring of the achieved performance. The reliability for prediction of the weld quality can be...
Online process control for laser beam materials processing (2000)
Kratsch, C., Abels, P., Kaierle, S., Poprawe, R., Schulz, W.
Laser beam materials processing requires both, high quality output as well as reliable monitoring actions for each processed part. The process diagnostic device commonly used in actual quality...
Coaxial process control during laser beam welding of tailored blanks (2000)
Kratzsch, C., Abels, P., Kaierle, S., Poprawe, R., Schulz, W.
Production of laser beam welded tailored blanks requires both, high quality processing as well as a quality assurance by reliable monitoring systems for each welded part. Actual quality monitoring...
Adaptive quality control for laser beam welding (1999)
Dahmen, M., Kaierle, S., Abels, P., Kratsch, C., Kreutz, E.W., Poprawe, R.
Universal coaxial process control system for laser materials processing (1999)
Abels, P., Kratsch, C., Schulz, W., Kaierle, S., Poprawe, R.
Vorrichtung zum beruehrungslosen Messen des Abstands von einem Objekt (1999)
Petring, D., Ruehl, F., Treusch, H.G., Noeldechen, W., Abels, P., Laessinger, P.
Device for the non-contact measurement of the distance (A) to an object (10), by means of an optical device which focusses a measuring beam (11) consisting of a light beam, in particular a laser...
Failure recognition in tailored blank welding by image processing (1998)
Abels, P., Kaierle, S., Kreutz, E.W., Poprawe, R.
Laser beam welding of tailored blanks is growing rapidly and the forecast for the following years predict a further development. The automotive industry as main customer for tailored blanks requires...
Diagnostics for laser welding (1996)
Kuepper, F., Berkmanns, J., Abels, P., Kaierle, S., Beyer, E.
Innovative, reliable and precise working sensor systems for monitoring and controlling the welding process and the weld seam quality are one of the important requirements to broaden the use of lasers...
Device for the welding of a belt (10) or a web (11) to a T joint or similar using high-energy radiation (15), in particular using laser radiation, using light from the detector (1,2) detecting the...
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...
Seidel, B., Abels, P., Beyer, E.
Process for the on-line monitoring of workpiece machining by means of laser radiation, in particular for the detection of welding defects by observation of weld spatter. In said process, light...
Different diagnostic devices have been developed to control the process in laser beam applications. Two devices control the laser beam in real time, the other devices detect the emitted radiation...
Process monitoring in laser materials processing (1992)
Examples of process monitoring and real time process control in a time scale below 0,1 ms in laser materials processing are given. Considering industrial applications, means for the detection of...
Verfahrensentwicklung zum definierten Formabtrag mit Laserstrahlung (1991)
Lässiger, B., Treusch, H.G., Abels, P., Nöldechen, W., Petring, D., Beyer, E.
Abtragende Bearbeitungsverfahren, die als Werkzeug fokussierte Laserstrahlung verwenden, sind bereits seit mehreren Jahren beim Trimmen, Markieren und Texturieren von Oberflächen in der...
Beyer, E., Petring, D., Abels, P., Herziger, G.
Verfahren zum Bearbeiten von Werkstuecken (10) mit Laserstrahlung (11), insbesondere zum Schneiden, Einlochen und Abtragen metallischer Werkstuecke (10), bei dem die Bearbeitungsstelle (12) des...
Prozeßgesteuerte Materialbearbeitung mit Lasern (1991)
Gatzweiler, W., Abels, P., Sokolowski, W.
Der Laserstrahl ist ein berührungslos und verschleißfrei arbeitendes Werkzeug, das mit hoher Geschwindigkeit und großer Genauigkeit gesteuert werden kann. Die volle Nutzung der Möglichkeiten des...
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...
Technique to control the boring process in laser beam cutting. (1990)
Abels, P., Petring, D., Beyer, E.
Research and development activities in the field of laser material processing aim increasingly at the realisation of techniques and devices for process diagnostic and process control (1,2,3). This...
Laser beam cutting of highly alloyed thick section steels. (1990)
Petring, D., Abels, P., Nöldechen, W., Preissig, K.U., Beyer, E.
At present, highly alloyed steels in the thickness range above 8 mm can be cut by laser radiation to only a limited extent: The high portion of alloying constituents is indeed reducing the thermal...
Petring, D., Abels, P., Beyer, E.
The absorption behaviour of metallic materials during laser beam cutting is examined under the presumption of a three dimensional cutting front model by applying the Fresnel formalism. The resulting...
Petring, D., Abels, P., Beyer, E., Herziger, G.
Das Schneiden mit Laserstrahlung ist ein seit Jahren etabliertes Verfahren. Insbesondere niedrig legierte Stähle und einige Edelstähle werden heute in der metallverarbeitenden Industrie mit dem...