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Licensed Unlicensed Requires Authentication Published by De Gruyter February 4, 2016

Transient beam oscillation with a highly dynamic scanner for laser beam fusion cutting

  • Cindy Goppold

    Cindy Goppold is a research associate in the department Laser Ablation and Cutting at the Fraunhofer Institute for Material and Beam Technology IWS in Dresden, Germany. She earned her Master of Engineering in Laser- and Optotechnologies at the University of Applied Sciences Ernst-Abbe-Hochschule Jena, Germany. Her current research interests focus on the development of new approaches for the conventional laser beam cutting of metals.

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    , Thomas Pinder

    Thomas Pinder is a research associate in the department Laser Ablation and Cutting at the Fraunhofer Institute for Material and Beam Technology IWS in Dresden, Germany. He studied Mechanical Engineering at the Technical University of Dresden, Germany. He gained competences in signal processing in the case of laser beam cutting over the last years.

    and Patrick Herwig

    Patrick Herwig studied Mechatronics to MSc degree. He received his PhD in Mechanical Engineering at the Technical University of Dresden, Germany. After 5 years of research activities in the field of System Technology, he takes the lead of the Laser Cutting group at Fraunhofer IWS. His team focuses on efficiency and quality improvements for conventional laser cutting processes and the development of new technologies like the laser remote cutting.

Abstract

Sheet metals with thicknesses >8 mm have a distinct cutting performance. The free choice of the optical configuration composed of fiber diameter, collimation, and focal length offers many opportunities to influence the static beam geometry. Previous analysis points out the limitations of this method in the thick section area. Within the present study, an experimental investigation of fiber laser fusion cutting of 12 mm stainless steel was performed by means of dynamical beam oscillation. Two standard optical setups are combined with a highly dynamic galvano-driven scanner that achieves frequencies up to 4 kHz. Dependencies of the scanner parameter, the optical circumstances, and the conventional cutting parameters are discussed. The aim is to characterize the capabilities and challenges of the dynamic beam shaping in comparison to the state-of-the-art static beam shaping. Thus, the trials are evaluated by quality criteria of the cut edge as surface roughness and burr height, the feed rate, and the cut kerf geometry. The investigation emphasizes promising procedural possibilities for improvements of the cutting performance in the case of fiber laser fusion cutting of thick stainless steel by means of the application of a highly dynamic scanner.


Corresponding author: Cindy Goppold, Fraunhofer IWS, Winterbergstraße 28, 01277 Dresden, Germany, e-mail:

About the authors

Cindy Goppold

Cindy Goppold is a research associate in the department Laser Ablation and Cutting at the Fraunhofer Institute for Material and Beam Technology IWS in Dresden, Germany. She earned her Master of Engineering in Laser- and Optotechnologies at the University of Applied Sciences Ernst-Abbe-Hochschule Jena, Germany. Her current research interests focus on the development of new approaches for the conventional laser beam cutting of metals.

Thomas Pinder

Thomas Pinder is a research associate in the department Laser Ablation and Cutting at the Fraunhofer Institute for Material and Beam Technology IWS in Dresden, Germany. He studied Mechanical Engineering at the Technical University of Dresden, Germany. He gained competences in signal processing in the case of laser beam cutting over the last years.

Patrick Herwig

Patrick Herwig studied Mechatronics to MSc degree. He received his PhD in Mechanical Engineering at the Technical University of Dresden, Germany. After 5 years of research activities in the field of System Technology, he takes the lead of the Laser Cutting group at Fraunhofer IWS. His team focuses on efficiency and quality improvements for conventional laser cutting processes and the development of new technologies like the laser remote cutting.

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Received: 2015-12-2
Accepted: 2016-1-13
Published Online: 2016-2-4
Published in Print: 2016-2-1

©2016 THOSS Media & De Gruyter

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