TY - JOUR A1 - Mauerer, Wolfgang A1 - Rexhepaj, Tanja A1 - Monkman, Gareth J. A1 - Sindersberger, Dirk A1 - Diermeier, Andreas A1 - Neidhart, Thomas A1 - Wolfrum, Dominik A1 - Sterner, Michael A1 - Heberl, Michael A1 - Nusko, Robert A1 - Maier, Georg A1 - Nagl, Klaus A1 - Reuter, Monika A1 - Hofrichter, Andreas A1 - Lex, Thomas A1 - Lesch, Florian A1 - Kieninger, Bärbel A1 - Szalo, Alexander Eduard A1 - Zehner, Alexander A1 - Palm, Christoph A1 - Joblin, Mitchell A1 - Apel, Sven A1 - Ramsauer, Ralf A1 - Lohmann, Daniel A1 - Westner, Markus A1 - Strasser, Artur A1 - Munndi, Maximilian A1 - Ebner, Lena A1 - Elsner, Michael A1 - Weiß, Nils A1 - Segerer, Matthias A1 - Hackenberg, Rudolf A1 - Steger, Sebastian A1 - Schmailzl, Anton A1 - Dostalek, Michael A1 - Armbruster, Dominik A1 - Koch, Fabian A1 - Hierl, Stefan A1 - Thumann, Philipp A1 - Swidergal, Krzysztof A1 - Wagner, Marcus A1 - Briem, Ulrich A1 - Diermeier, Andreas A1 - Spreitzer, Stefan A1 - Beiderbeck, Sabrina A1 - Hook, Christian A1 - Zobel, Martin A1 - Weber, Tim A1 - Groß, Simon A1 - Penzkofer, Rainer A1 - Dendorfer, Sebastian A1 - Schillitz, Ingo A1 - Bauer, Thomas A1 - Rudolph, Clarissa A1 - Schmidt, Katja A1 - Liebetruth, Thomas A1 - Hamer, Markus A1 - Haug, Sonja A1 - Vernim, Matthias A1 - Weber, Karsten A1 - Saßmannshausen, Sean Patrick A1 - Books, Sebastian A1 - Neuleitner, Nikolaus A1 - Rechenauer, Christian A1 - Steffens, Oliver A1 - Kusterle, Wolfgang A1 - Gömmel, Roland A1 - Wellnitz, Felix A1 - Stierstorfer, Johannes A1 - Stadler, Dominik A1 - Hofmann, Matthias J. A1 - Motschmann, Hubert A1 - Shamonin (Chamonine), Mikhail A1 - Bleicher, Veronika A1 - Fischer, Sebastian A1 - Hackenberg, Rudolf A1 - Horn, Anton A1 - Kawasch, Raphael A1 - Petzenhauser, Michael A1 - Probst, Tobias A1 - Udalzow, Anton A1 - Dams, Florian A1 - Schreiner, Rupert A1 - Langer, Christoph A1 - Prommesberger, Christian A1 - Ławrowski, Robert Damian ED - Baier, Wolfgang T1 - Forschungsbericht 2016 T3 - Forschungsberichte der OTH Regensburg - 2016 Y1 - 2016 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:898-opus4-13840 CY - Regensburg ER - TY - CHAP A1 - Schmailzl, Anton A1 - Steger, Sebastian A1 - Dostalek, Michael A1 - Hierl, Stefan ED - Klotzbach, U. ED - Washio, K. ED - Arnold, C. B. T1 - Online process monitoring at quasi-simultaneous laser transmission welding using a 3D-scanner with integrated pyrometer T2 - Proc. SPIE, Laser-based Micro- and Nanoprocessing X, SPIE LASE 2016, San Francisco, California, United States N2 - Quasi-simultaneous laser transmission welding is a well-known joining technique for thermoplastics and mainly used in the automotive as well as in the medical industry. For process control usually the so called set-path monitoring is used, where the weld is specified as "good" if the irradiation time is inside a defined confidence interval. However, the detection of small-sized gaps or thermal damaged zones is not possible with this technique. The analyzation of the weld seam temperature during welding offers the possibility to overcome this problem. In this approach a 3D-scanner is used instead of a scanner with flat-field optic. By using a pyrometer in combination with a 3D-scanner no color-corrected optic is needed in order to provide that laser- and detection-spot are concentric. Experimental studies on polyethylene T-joints have shown that the quality of the signal is adequate, despite the use of an optical setup with a long working distance and a small optical aperture. The effects on temperature are studied for defects like a gap in the joining zone. Therefore a notch was milled into the absorbent polymer. In case of producing housings for electronic parts the effect of an electrical wire between the joining partners is also investigated. Both defects can be identified by a local temperature deviation even at a feed rate of four meters per second. Furthermore a strategy for signal-processing is demonstrated. By this, remaining defects can be identified. Consequently an online detection of local defects is possible, which makes a dynamic process control feasible. KW - Defect detection KW - Fiber lasers KW - Laser ablation KW - Laser processing KW - Laser welding KW - Mirrors KW - Process control KW - Pyrometry KW - Scanners KW - Signal processing KW - Temperature metrology KW - Polymers Y1 - 2016 U6 - https://doi.org/10.1117/12.2211705 IS - 97361J SP - 1 EP - 7 ER - TY - RPRT A1 - Steger, Sebastian A1 - Schmailzl, Anton A1 - Dostalek, Michael A1 - Armbruster, Dominik A1 - Hierl, Stefan ED - Baier, Wolfgang T1 - Entwicklung einer Systemtechnik für das quasisimultane Laser-Durchstrahlschweißen von 3D-Kunststoffbauteilen mit Temperaturmessung und Spanndruckregelung T2 - OTH Forschungsbericht 2016 Y1 - 2016 UR - https://doi.org/10.35096/othr/pub-1384 SP - 37 EP - 38 PB - Inixmedia GmbH CY - Kiel ER - TY - CHAP A1 - Schmailzl, Anton A1 - Armbruster, Dominik A1 - Dostalek, Michael A1 - Steger, Sebastian A1 - Hierl, Stefan ED - Falter, Thomas T1 - Strahlführungs- und -formungskonzept zur koaxialen Temperaturmessung beim scanner-basierten Laser-Durchstrahlschweißen T2 - 2. OTH-Clusterkonferenz, 18. Januar 2017, Techbase, Regensburg, Tagungsband Y1 - 2016 SP - 201 EP - 204 PB - Weber Druck CY - Regensburg ER - TY - CHAP A1 - Dostalek, Michael A1 - Hierl, Stefan ED - Mottok, Jürgen ED - Reichenberger, Marcus ED - Scharfenberg, Georg ED - Ziemann, Olaf T1 - Experimental study to evaluate the influence of clamping pressure variation during laser transmission welding of plastics T2 - Applied Research Conference 2015 ARC 2015; 3rd July 2015 Nürnberg Y1 - 2015 SP - 289 EP - 294 PB - pro Business CY - Berlin ER - TY - JOUR A1 - Dostalek, Michael A1 - Steger, Sebastian A1 - Schmailzl, Anton A1 - Hierl, Stefan T1 - Detecting Defects Reliably BT - Pyrometer-Based Temperature Measurement during Quasi-Simultaneous Laser Transmission Welding JF - Kunststoffe International N2 - The integration of a broadband pyrometer in a 3-D scanner enables a continuous and local temperature measurement during the quasi-simultaneous laser transmission welding process. Welding tests on polyethylene samples show that defects can be clearly identified based on the temperature signal, despite a high scanning velocity. Y1 - 2015 VL - 105 IS - 12 SP - 37 EP - 40 ER - TY - JOUR A1 - Steger, Sebastian A1 - Dostalek, Michael A1 - Schmailzl, Anton A1 - Hierl, Stefan T1 - Fehlstellen sicher erkennen BT - Pyrometerbasierte Temperaturmessung beim quasi-simultanen Laser-Durchstrahlschweißen JF - Kunststoffe Y1 - 2015 VL - 105 IS - 12 SP - 55 EP - 58 ER -