ICALEO 2008 Paper #701 (Laser Processing for Alternatives Energy Devices: Advanced Battery and Fuel Cell Applications)
Laser Processing for Alternatives Energy Devices: Advanced Battery and Fuel Cell Applications
Authors:
Hans Herfurth, Fraunhofer Center for Laser Technology (Clt); Plymouth MI USA
Rahul Patwa, Fraunhofer Center for Laser Technology (Clt); Plymouth MI USA
Henrikki Pantsar, Fraunhofer Center for Laser Technology (Clt); Plymouth MI USA
Golam Newaz, Wayne State University, College of Engineering; Detroit MI USA
Stefan Heinemann, Fraunhofer Center for Laser Technology (Clt); Plymouth MI USA
Presented at ICALEO 2008
Hybrid Electric Vehicles (HEVs) are a fast expanding global market, driven by consumer concerns about steadily rising gasoline prices,...$28.00
ICALEO 2008 Paper #702 (Influence of Material and Process Parameters on the Humping Effect)
Influence of Material and Process Parameters on the Humping Effect
Authors:
Steffen Neumann, BIAS Bremer Institut für angewandte Strahltechnik GmbH; Bremen Germany
Thomas Seefeld, Bias Bremer Institut F Angewandte Strahltechnik Gmbh; Bremen Germany
Matthias Schilf, Bias Bremer Institut F Angewandte Strahltechnik Gmbh; Bremen Germany
Presented at ICALEO 2008
In laser beam welding processes, a serious challenge is to overcome limitations in processing speed set by the humping effect. This effect, which starts if a certain welding speed is exceeded for a given configuration of material and processing parameters, is characterized by melt pool instabilities leading t...$28.00
ICALEO 2008 Paper #703 (The Effect of Welding Parameters on Keyhole and Melt Pool Behavior during Laser Welding with High Power Fiber Laser)
The Effect of Welding Parameters on Keyhole and Melt Pool Behavior during Laser Welding with High Power Fiber Laser
Authors:
Antti Salminen, Lappeenranta University of Technology; Lappeenranta Finland
Janne Lehtinen, Cavitar Ltd; Tampere Finland
Petri Harkko, Cavitar Ltd; Tampere Finland
Presented at ICALEO 2008
Laser welding has ever growing role in manufacturing technology. Keyhole laser welding is the most important laser welding process for metal industry. This process utilizes efficiently the high energy density of laser beam to vaporize and melt material thus producing a keyhole to material via which the energy is brought to the material. The welding becomes ever...$28.00
ICALEO 2008 Paper #704 (Fundamental Understanding of Spatter Behavior at Laser Welding of Steel)
Fundamental Understanding of Spatter Behavior at Laser Welding of Steel
Authors:
Jan Weberpals, TGSW mbH; Stuttgart Germany
Friedrich Dausinger, Dausinger + Giesen GmbH; Stuttgart Germany
Presented at ICALEO 2008
Based on results of thin disk and fiber laser experiments it has been shown in earlier publications that strong focusability at high laser power can be used for an expansion of the application range. A strong spatter formation in laser welding of steel has been observed at high velocities (enabled by strong focusability), however. In order to understand the underlying processes, measurements of the front keyhole inclination supported by simplified calculations have been pe...$28.00
ICALEO 2008 Paper #705 (Development of Ultra Deep Penetration Welding with 10 kW Fiber Laser)
Development of Ultra Deep Penetration Welding with 10 kW Fiber Laser
Authors:
Xudong Zhang, Materials Research Laboratory,Hitachi Ltd.; Hitachi-Shi, Ibaraki-Ken Japan
Eiji Ashida, Materials Research Laboratory, Hitachi Ltd.; Hitachi-Shi, Ibaraki-Ken Japan
Masami Mizutani, Osaka University; Osaka Japan
Seiji Katayama, Osaka University; Osaka Japan
Presented at ICALEO 2008
Wine-cup weld bead geometry with excessive wide bead surface is apt to form in high-power high-brightness laser welding in the range of low welding speeds (lower than 1 m/min), because the keyhole is unstable in the large molten pool, thus the metal plume/plasma ejects from the keyhole in ...$28.00
ICALEO 2008 Paper #706 (The Effect of Shielding Gas on Deep Penetration High Power Fiber Laser Welding of Thick Plate Steel for Pipe Line Construction)
The Effect of Shielding Gas on Deep Penetration High Power Fiber Laser Welding of Thick Plate Steel for Pipe Line Construction
Authors:
Mok-Young Lee, RIST; Pohang South Korea
Presented at ICALEO 2008
Pipe line was the most effective way for transportation of the resources such as oil, gas, water. Cost and performance of the pipe line was depends mainly on welding process. High power fiber laser has deep penetration welding capability with high productivity as well as mobile welding performance by compact design and high wall plug efficiency. In this study, the effect of shielding conditions on deep penetration welding with high power fiber laser. The material was SS400 grade steel of 12mm thic...$28.00
ICALEO 2008 Paper #707 (Laser Absorption in High-power Fiber Laser Welding of Stainless Steal and Aluminum Alloy)
Laser Absorption in High-power Fiber Laser Welding of Stainless Steal and Aluminum Alloy
Authors:
Naoyuki Matsumoto, Osaka University; Ibaraki Japan
Masami Mizutani, Osaka University; Ibaraki Japan
Yousuke Kawahito, Osaka University; Ibaraki Japan
Seiji Katayama, Osaka University; Ibaraki Japan
Presented at ICALEO 2008
High power and high brightness fiber lasers have been developed, and it is revealed that a deeper and narrower weld bead can be produced with the increase in the power density. Thus high absorptivity of laser energy is expected, but there are few systematic experimental researches of laser absorption in conjunction with a beam diameter and ...$28.00
ICALEO 2008 Paper #708 (Robot-guided Remote Laser Scanner Welding for Highly-productive Welding Applications)
Robot-guided Remote Laser Scanner Welding for Highly-productive Welding Applications
Authors:
Thomas Schwoerer, Trumpf Laser; Schramberg Germany
Presented at ICALEO 2008
Remote Laser Welding has revolutionized high-volume production. Based on the emergence of high-power Disk Lasers and high-performance Scanner Welding Optics this technology is outperforming other welding technologies with respect to productivity, quality, flexibility and cost per part. The use of highly dynamic optical scanner systems to deflect the laser beam allows improvements of production throughput between 200% and 600%, yet capitalizes on known laser welding advantages like minimized heat input, single-side access, etc. ...$28.00
ICALEO 2008 Paper #709 (Influence of Remote-Laser-Welding Parameters for an 8 Kw Fibre Laser on the Seam Quality of Steels)
Influence of Remote-Laser-Welding Parameters for an 8 Kw Fibre Laser on the Seam Quality of Steels
Authors:
Florian Oefele, Institute for Machine Tools and Industrial Management; Garching Germany
Jan Musiol, Institute for Machine Tools and Industrial Management; Garching Germany
Michael F. Zaeh, Institute for Machine Tools and Industrial Management; Garching Germany
Presented at ICALEO 2008
This paper renders the research for contactless welding with long focal distances without supply of shielding gas or welding filler material from the welding head called Remote-Laser-Welding (RLW). Typical values for the distances between the focusing optic and the workpiece are wi...$28.00
ICALEO 2008 Paper #710 (An Assessment of the Welding Performance of High-Brightness Lasers and a Comparison with In-Vacuum Electron Beams)
An Assessment of the Welding Performance of High-Brightness Lasers and a Comparison with In-Vacuum Electron Beams
Authors:
Geert Verhaeghe, The Welding Institute; Cambridge Great Britain
Bruce Dance, Electron Beam Group; Cambridge Great Britain
Presented at ICALEO 2008
A unique experiment carried out at TWI a few years ago compared the welding performance of a number of fibre-delivered lasers with beam qualities ranging between 4 and 23mm.mrad, under identical processing conditions, and demonstrated the effect of laser beam brightness, together with beam quality and spot diameter, on the welding performance of both steel and aluminium. This paper describes a continuation of this ea...$28.00