PUMA publications for /user/ifsw/ProcessDevelopmentThu Dec 19 13:36:31 CET 2024München132Laser in der Materialbearbeitung - Forschungsberichte des IFSWEinfluss von Strahlformung auf Absorption, Fugenquerschnitt und Produktivität beim LaserschneidendoctoralThesis2024BeamShaping ProcessDevelopment Cutting Tue May 14 16:33:35 CEST 2024Exceeding the Limits in Laser Materials Processing by Bridging Additive and Subtractive Manufacturing with Continuous Wave and Ultrashort Pulsed Lasers - Manufacturing of Parts with Undercuts2024myown ablation additivemanufacturing micromaterialprocessing ultrashort selectivelasermeltingslm macromaterialprocessing pulse processdevelopment Laser-based powder bed fusion of metals faces limitations in accuracy, surface quality, and minimal structure size resulting from the inherent melting process. To address these challenges, a novel approach integrating additive and subtractive laser processes at the layer level has been developed. This quasi-simultaneous manufacturing process enables the fabrication of small structures with high aspect ratios, including narrow slits below 50 μm in width. The implications of this advancement are promising, particularly in the fields of electric drives and fuel cells, where accuracy and freedom of design are crucial. In this work, the latest results of the production of narrow, inclined slits in components made of pure iron will be shown. Characteristics like groove-to-groove distance and groove width were analyzed, achieving successful production of continuous slits with varying inclination angles of up to 30° within the manufactured components.Tue May 07 23:03:16 CEST 2024Laser 3D Manufacturing XIMarchProc. SPIEExceeding the Limits in Laser Materials Processing by Bridging Additive and Subtractive Manufacturing with Continuous Wave and Ultrashort Pulsed Lasers - Manufacturing of Parts with Undercuts128762024myown ProcessDevelopment SelectiveLaserMelting Ablation MicroMaterialProcessing SLM AdditiveManufacturing UltrashortPulse MacroMaterialProcessing Laser-based powder bed fusion of metals faces limitations in accuracy, surface quality, and minimal structure size resulting from the inherent melting process. To address these challenges, a novel approach integrating additive and subtractive laser processes at the layer level has been developed. This quasi-simultaneous manufacturing process enables the fabrication of small structures with high aspect ratios, including narrow slits below 50 μm in width. The implications of this advancement are promising, particularly in the fields of electric drives and fuel cells, where accuracy and freedom of design are crucial. In this work, the latest results of the production of narrow, inclined slits in components made of pure iron will be shown. Characteristics like groove-to-groove distance and groove width were analyzed, achieving successful production of continuous slits with varying inclination angles of up to 30° within the manufactured components.Tue Mar 22 17:09:27 CET 2022Proceedings of the Lasers in Manufacturing ConferenceJuneCombining LPBF and ultrafast laser processing to produce parts with deep microstructures2021myown from:manuelhenn lpbf micromaterialprocessing ultrashortpulse processdevelopment Laser Powder Bed Fusion (LPBF) is limited in the achievable accuracy, surface quality and structure size due to its inherent melting process. The achievable structure sizes are mainly dependent on the focal diameter and the grain size of the powder. Smaller structures, especially deep and narrow slits with a width below 100 µm, are still a major challenge. Combining continuous wave and ultrashort pulsed lasers in the same optical system enables consecutive additive and subtractive processes. This results in a quasi-simultaneous manufacturing process, where the emerging part can be precisely machined with ultrafast laser ablation after each additively added layer. In the talk the system technology used for the superposition of the lasers as well as the results of the combined additive and subtractive processes for the fabrication of deep and narrow slits in stainless steel parts will be shown.Tue Mar 22 17:08:32 CET 2022Proceedings of the Lasers in Manufacturing Conference4Combining LPBF and ultrafast laser processing to produce parts with deep microstructures2021myown from:manuelhenn lpbf micromaterialprocessing ultrashortpulse processdevelopment Laser Powder Bed Fusion (LPBF) is limited in the achievable accuracy, surface quality and structure size due to its inherent melting process. The achievable structure sizes are mainly dependent on the focal diameter and the grain size of the powder. Smaller structures, especially deep and narrow slits with a width below 100 µm, are still a major challenge. Combining continuous wave and ultrashort pulsed lasers in the same optical system enables consecutive additive and subtractive processes. This results in a quasi-simultaneous manufacturing process, where the emerging part can be precisely machined with ultrafast laser ablation after each additively added layer. In the talk the system technology used for the superposition of the lasers as well as the results of the combined additive and subtractive processes for the fabrication of deep and narrow slits in stainless steel parts will be shown.Wed Mar 31 18:07:38 CEST 2021TMS 2020 149th Annual Meeting & Exhibition Supplemental Proceedingsmar1979-1991Advances in Dry Metal Forming Using Volatile Lubricants Injected Through Laser-Drilled Microholes1492020MicroMaterialProcessing Drilling myown from:manuelhenn Ablations UltrashortPulse ProcessDevelopment Steel Tue Mar 30 19:33:28 CEST 2021JOMjul72517--2524Dry Metal Forming Using Volatile Lubricants Injected into the Forming Tool Through Flow-Optimized, Laser-Drilled Microholes722020MicroMaterialProcessing Drilling myown from:manuelhenn Peer UltrashortPulse ProcessDevelopment Steel Ablation 01A novel tribologic system was developed in which volatile lubricants (carbon dioxide---CO2 or nitrogen---N2) were used as a substitute for mineral oil-based lubricants in deep drawing processes. This process allows an intermediate medium to be introduced into the tool contact surfaces under high pressure by flow-optimized, laser-drilled microholes. This eliminates the need for subsequent cost-intensive cleaning processes as volatile lubricants evaporate while expanding to ambient pressure without leaving any residue. This article gives an overview of the current findings to enable and characterize the novel tribologic system. The areas of microhole laser drilling by ultrashort pulsed laser radiation, characterization of the novel tribologic system and realization of the system using a prototype tool will be described.Tue Sep 22 18:02:35 CEST 2020may IFSW18-21 Entwicklung und Aufbau einer Strahlformregelung auf Basis eines programmierbaren Phasenmodulators2018Robert_Bosch_GmbH Holder,D. Mikhalyov,D. Laser BeamShaping ProcessDevelopment from:julianholland Masterarbeit Tue Nov 19 14:30:38 CET 2019Benefits of High-Speed Welding with 16 kW Lasers2018myown aluminum high_power laser from:florianfetzer laserwelding processdevelopment Tue Nov 19 11:55:50 CET 2019Optics and Lasers in Engineering56--64Statistical evaluation method to determine the laser welding depth by optical coherence tomography1192019OCT diagnostics from:florianfetzer laser myown peer processdevelopment welding Tue Apr 16 11:14:17 CEST 2019mar IFSW16-08 Hochpräziser Materialabtrag von rotationssymmetrischen CFK Bauteilen 2016Laser from:florianfetzer Wiedenmann,Margit ProcessDevelopment Ablation Masterarbeit Tue Apr 16 11:13:29 CEST 2019jan IFSW16-02 Kamerabasierte Diagnostik der Prozessemissionen beim Laserabtrag von CFK 2016Freitag,Christian Laser from:florianfetzer ProcessDevelopment Masterarbeit CFRP Tue Apr 16 11:12:57 CEST 2019aug IFSW97-33 Schweißen von Aluminiumwerkstoffe mit einem 3kW Nd: YAG Festkörper unter Einsatz einer Bearbeitungsoptik mit der Brennweite f = 1001997Studienarbeit NdYAG Welding Laser from:florianfetzer ProcessDevelopment Schinzel,Cornelius Aluminium Tue Apr 16 11:12:02 CEST 2019jul IFSW10-26 Spektrometrische Vermessung der Schnittfront2010Studienarbeit Onuseit,Volkher Laser from:florianfetzer ProcessDevelopment Cutting Spectroskopy Tue Apr 16 11:07:07 CEST 2019nov IFSW10-33 Laserfügen von stromführenden Kontakten mit kritischen Randbedingungen bezüglich Werkstoff und Geometrie2010Laser from:florianfetzer Heider,Andreas ProcessDevelopment Bonding Diplomarbeit Tue Apr 16 11:06:50 CEST 2019mar IFSW97-04 Steigerung der Nahtqualität beim Schweißen von AlMgSi1 mit CO2-Laser d. Zweistrahltechnik1997Welding Laser from:florianfetzer Glumann,Christiane ProcessDevelopment Rapp,Jürgen GasLaser Diplomarbeit MultipleBeamTechnology Tue Apr 16 11:06:31 CEST 2019aug IFSW92-31 Prozeßdiagnose und -optimierung beim 3D-Laserhärten mit Industrieroboter1992Bloehs,Wolfgang Studienarbeit Hardening ProcessMonitoring Laser from:florianfetzer ProcessDevelopment Tue Apr 16 11:02:34 CEST 2019aug IFSW10-27 Spektroskopische Untersuchung von Laserschweißprozessen2010Studienarbeit Spectroscopy Welding Laser Abt,Felix from:florianfetzer ProcessDevelopment Tue Apr 16 11:01:17 CEST 2019mar IFSW12-06 Charakterisierung der Kapillarfront durch Nutzung der polarisierten Wärmestrahlung2012Bachelorarbeit Capillary Laser from:florianfetzer Weberpals,Jan-Philipp ProcessDevelopment Tue Apr 16 11:00:05 CEST 2019jul IFSW05-15 Bestimmung des Einkoppelwirkungsgrades und der Schweißnahtabmessungen zur Kalibrierung des vereinfachten Prozessmodells für das Laserstrahlschweißen2005Studienarbeit Welding Laser from:florianfetzer ProcessDevelopment Heckeler,Gerald