ICALEO 2012 Paper #701 (Electromagnetic Control of the Weld Pool Dynamics in Partial Penetration Laser Beam Welding of Aluminium Alloys)

Electromagnetic Control of the Weld Pool Dynamics in Partial Penetration Laser Beam Welding of Aluminium Alloys
Authors:
Vjaceslav Avilov, Federal Institute for Materials Research and Testing (BAM); Berlin Germany
André Schneider, Federal Institute for Materials Research and Testing (BAM); Berlin Germany
Marco Lammers, Federal Institute for Materials Research and Testing (BAM); Berlin Germany
Andrey Gumenyuk, Federal Institute for Materials Research and Testing (BAM); Berlin Germany
Michael Rethmeier, Federal Institute for Materials Research and Testing (BAM); Berlin Germany
Presented at ICALEO 2012

An oscillating (AC) magnet field was used t...

ICALEO 2012 Paper #706 (Twinquasi - A New Method for Quasi-Simultaneous Laser Welding of Polymers)

Twinquasi – A New Method for Quasi-Simultaneous Laser Welding of Polymers
Authors:
Saara Ruotsalainen, VTT Technical Research Centre of Finland; Lappeenranta Finland
Petri Laakso, VTT Technical Research Centre of Finland; Lappeenranta Finland
Matti Manninen, Lappeenranta Univ. of Technology; Lappeenranta
Tuomas Purtonen, Lappeenranta Univ. of Technology; Lappeenranta
Veli Kujanpää, VTT Technical Research Centre of Finland; Lappeenranta
Antti Salminen, Lappeenranta Univ. of Technology; Lappeenranta
Presented at ICALEO 2012

Quasi-simultaneous laser welding (QSLW) of polymers has been studied, developed and used in indust...

ICALEO 2012 Paper #707 (Controllable Beam Intensity Profile for the Tasks of Laser Material Processing)

Controllable Beam Intensity Profile for the Tasks of Laser Material Processing
Authors:
Alexander Laskin, AdlOptica GmbH; Berlin Germany
Vadim Laskin, AdlOptica GmbH; Berlin Germany
Presented at ICALEO 2012

Modern techniques of laser material processing require not only simple homogenizing of a beam, but also more freedom in manipulation of intensity profile and generating such profiles like super-Gaussian and inverse-Gaussian; controllable varying of the intensity profile allows to adjust" a particular material processing technology, improve it or make more efficient. These tasks can be successfully accomplished using the field mapping refractive beam shaping optics like piShap...

ICALEO 2012 Paper #709 (Pulsed Laser Weldability of Hastelloy C-276: Corrosion-Resistant Property)

Pulsed Laser Weldability of Hastelloy C-276: Corrosion-Resistant Property
Authors:
Guangyi Ma, Key Laboratory for Precision and Non-Traditional Machining Technology of Ministry of Education, Dalian Univ. of Technology; Dalian Peoples Republic of China
Mengxue Wu, School of Physics and Optoelectronic Engineering, Dalian Univ. of Technology; Dalian Peoples Republic of China
Shibo Liu, Key Laboratory for Precision and Non-Traditional Machining Technology of Ministry of Education, Dalian Univ. of Technology; Dalian Peoples Republic of China
Dongjiang Wu, Key Laboratory for Precision and Non-Traditional Machining Technology of Ministry of Education, Dalian Univ. of Technology...

ICALEO 2012 Paper #801 (A Technical and Commercial Comparison of Fiber Laser and CO2 Laser Cutting)

A Technical and Commercial Comparison of Fiber Laser and CO2 Laser Cutting
Authors:
John Powell, Lulea Univ. of Technology, Laser Expertise Ltd; Luleå Sweden
Alexander Kaplan, Lulea Univ. of Technology; Lulea Sweden
Presented at ICALEO 2012

This paper presents a direct comparison of fiber laser and CO2 laser cutting machines from a "what laser should you buy next?" point of view. Both types of machine have their drawbacks and advantages, and a direct comparison needs to compare costs, cutting speeds, cut quality and several other factors, including maintenance and safety considerations. The overall conclusion of the paper is that, from a jobshop perspective, the CO2 laser is a mor...

ICALEO 2012 Paper #802 (Impact of Thermal Focal Shift on Laser Cutting Processes with High Brightness Lasers)

Impact of Thermal Focal Shift on Laser Cutting Processes with High Brightness Lasers
Authors:
Sasia Eiselen, Bayerisches Laserzentrum GmbH; Erlangen Graduate School in Advanced Optical Technologies (SAOT), Friedrich-Alexander Univ. Erlangen-Nuremberg; Erlangen Germany
Heiko Zapf, Bayerisches Laserzentrum GmbH; Erlangen Germany
Eugenia Mantel, Bayerisches Laserzentrum GmbH; Erlangen Germany
Lukas Hofmann, Chair of Photonic Technologies, Friedrich Alexander Univ. Erlangen-Nuremberg; Erlangen
Michael Schmidt, Bayerisches Laserzentrum GmbH; Erlangen Graduate School in Advanced Optical Technologies (SAOT), Chair of Photonic Technologies, Friedrich-Alexander Univ. ...

ICALEO 2012 Paper #803 (Identification and Characterization of Analogies of Remote Fusion Cutting Processes Using Different Beam Sources)

Identification and Characterization of Analogies of Remote Fusion Cutting Processes Using Different Beam Sources
Authors:
Matthias Luetke, Fraunhofer IWS Dresden; Dresden Germany
Alexander Wagner, Fraunhofer IWS Dresden; Dresden Germany
Andreas Wetzig, Fraunhofer IWS Dresden; Dresden Germany
Eckhard Beyer, Fraunhofer IWS Dresden, TU Dresden; Dresden Germany
Presented at ICALEO 2012

Based on experimental investigations in 1985, researchers identified a remote cutting process with CO2-Lasers using no assist gas in order to conduct emergency restoration work in the gas industry. The task was to clean the head of out-of-control gas wells. A couple of years lat...

ICALEO 2012 Paper #805 (Mass and Momentum Transfer of Oxygen Jet to the Melt in Laser Cutting of Mild Steel)

Mass and Momentum Transfer of Oxygen Jet to the Melt in Laser Cutting of Mild Steel
Authors:
Grigoriy Ermolaev, Institute of Theoretical and Applied Mechanics SB RAS; Novosibirsk Russia
Alexander Zaitsev, Institute of Theoretical and Applied Mechanics SB RAS; Novosibirsk Russia
Presented at ICALEO 2012

Momentum and heat transfer of inert gas jet to the melt in laser cutting is studied well by numerous researchers. Gas dynamic conditions of cutting with oxygen are significantly different from inert cutting: only 0.3 bar of high purity oxygen are enough to cut 10mm plate. Such a pressure level is absolutely insufficient for inert gas cutting. This paper is focused on the influence of...

ICALEO 2012 Paper #807 (Process-Reliable & Cost-Effective Laser Materials Processing)

Process-Reliable & Cost-Effective Laser Materials Processing
Authors:
Marco Lentjes, LIMO, Lissotschenko Mikrooptik GmbH; Dortmund Germany
Peter Bruns, LIMO, Lissotschenko Mikrooptik GmbH; Dortmund Germany
Michael Voss, LIMO, Lissotschenko Mikrooptik GmbH; Dortmund Germany
Klaus Reinecke, LIMO, Lissotschenko Mikrooptik GmbH; Dortmund Germany
Vitalij Lissotschenko, LIMO, Lissotschenko Mikrooptik GmbH; Dortmund Germany
Presented at ICALEO 2012

LIMO has developed the new generation DIOCUT systems with an output power in the range of 1.3 kW up to 4 KW out of a 400µm core fiber NA 0.12. Direct fiber coupled diode lasers have the potential to be mo...

ICALEO 2012 Paper #808 (TEA CO2 Laser Machining of Carbon Fiber-Reinforced Polymer Composites)

TEA CO2 Laser Machining of Carbon Fiber-Reinforced Polymer Composites
Authors:
Adel Salama, Laser Processing Research Centre, School of Mechanical, Aerospace and Civil Engineering, The Univ. of Manchester; Manchester Great Britain
Paul Mativenga, Laser Processing Research Centre, School of Mechanical, Aerospace and Civil Engineering, The Univ. of Manchester; Manchester Great Britain
Lin Li, Laser Processing Research Centre, School of Mechanical, Aerospace and Civil Engineering, The Univ. of Manchester; Manchester Great Britain
Presented at ICALEO 2012

The use of carbon fiber-reinforced polymer (CFRP) composites has gained wide interests and applications in the aerospac...