ICALEO 2006 Paper #803 (Three-dimensional Finite Element Models for the Calculation of Temperature and Residual Stress Fields in Laser Cladding)
Three-dimensional Finite Element Models for the Calculation of Temperature and Residual Stress Fields in Laser Cladding
Authors:
Augusto Deus, Instituto Superior Tecnico; Lisboa Portugal
Jyoti Mazumder, University of Michigan; Ann Arbor MI USA
Presented at ICALEO 2006
Laser Cladding (LC) and Direct Material Deposition (DMD) are well established Rapid Manufacturing techniques, in which a heat source -the laser beam- is brought together with a mass source -usually delivered in the form of a powder- in order to produce a 3D object. 3D transient thermal and mechanical lagrangean FE models, consistent with the additive nature of the process, were developed using the AbaqusTM software pa...$28.00
ICALEO 2006 Paper #802 (Interaction between Laser Beam, Process Effects and Structural Properties during Welding using Models based on the FEA)
Interaction between Laser Beam, Process Effects and Structural Properties during Welding using Models based on the FEA
Authors:
Loucas Papadakis, Institute for Machine Tools and Industrial Management (IWB) TU Muenchen; Garching Germany
Michael Zaeh, Institute for Machine Tools and Industrial Management (IWB) TU Muenchen; Garching Germany
Tobias Hornfeck, Institute for Machine Tools and Industrial Management (IWB) TU Muenchen; Garching Germany
Presented at ICALEO 2006
Aim of this contribution is to study the influence of laser beam on structural properties of sheet metals during welding by considering particular process effects. The interaction between process parameter...$28.00
ICALEO 2006 Paper #801 (Experimental Verification of Multi-Physical Modelling of the Keyhole Laser Welding Process)
Experimental Verification of Multi-Physical Modelling of the Keyhole Laser Welding Process
Authors:
Benno Aalderink, University of Twente; Enschede Netherlands
D.F. de Lange, Netherlands Institute for Metals Research; Netherlands
J. Meijer, University of Twente; Netherlands
R.G.K.M. Aarts, University of Twente; Netherlands
Presented at ICALEO 2006
In the past many models for the keyhole laser welding process have been proposed. These models range from very complex and computationally intensive to strongly simplified models. The model presented in this paper includes the essential physics, yet is sufficiently simple to run on a normal PC. The coupled ...$28.00
ICALEO 2006 Paper #706 (Self Guided Laser Welding)
Self Guided Laser Welding
Authors:
Boris Regaard, Fraunhofer Institute for Laser Technology; Aachen Germany
Reinhart Poprawe, Fraunhofer Institute for Laser Technology; Aachen Germany
Stefan Kaierle, Fraunhofer Institute for Laser Technology; Aachen Germany
Presented at ICALEO 2006
High flexibility and consistent quality are key benefits of laser welding in production. However, little jitter of welding trajectory and velocity are required; e.g. in butt welding the focal point of the laser beam with respect to the joint must be maintained with accuracy better than 50 - 100 microns, depending on the focused beam radius. To meet these requirements, seam tracking devices a...$28.00
ICALEO 2006 Paper #705 (Using Machine Vision for Observation of Phenomena during Laser Hybrid Welding)
Using Machine Vision for Observation of Phenomena during Laser Hybrid Welding
Authors:
Anna Fellman, LUT; Lappeenranta Finland
Antti Salminen, Lappeenranta University of Technology, Department of Mechanical Engineering, Laser processing laboratory; Lappeenranta Finland
Henri Fennander, Lappeenranta University of Technology, Department of Information Technology, Machine Vision and Pattern recognition research group; Lappeenranta Finland
Ville Kyrki, Lappeenranta University of Technology, Department of Information Technology, Machine Vision and Pattern recognition research group; Lappeenranta Finland
Presented at ICALEO 2006
Laser hybrid welding process is t...$28.00
ICALEO 2006 Paper #704 (Advanced Process Control in Laser Materials Processing - Advantages in Combining Various Sensor Technologies)
Advanced Process Control in Laser Materials Processing - Advantages in Combining Various Sensor Technologies
Authors:
Jürgen MLLER-BORHANIAN, Precitec KG; Germany
Markus Kogel-Hollacher, Precitec Optronik GmbH; Rodgau Germany
Christoph DIETZ, Precitec Optronik GmbH; Germany
Thomas NICOLAY, Precitec Optronik GmbH; Germany
Axel KATTWINKEL, Precitec Optronik GmbH; Germany
Presented at ICALEO 2006
The use of photo-diode sensors to in-line monitor a laser welding process is well known and state of the art. In the latter past the first camera based monitoring devices were presented and could demonstrate to be the right attempt to higher r...$28.00
ICALEO 2006 Paper #703 (Improving the Analysis of Laser Welding Process by the Reassigned Time-Frequency Representations)
Improving the Analysis of Laser Welding Process by the Reassigned Time-Frequency Representations
Authors:
Andrea Terreno, Centro Ricerche FIAT; Orbassano Italy
Giorgio Pasquettaz, Centro Ricerche FIAT; Orbassano Italy
Giuseppe D'Angelo, Centro Ricerche FIAT; Orbassano Italy
Presented at ICALEO 2006
On line quality monitoring in industrial plants is an open field for signal processing application. In this paper we propose the reassigned time-frequency representations as useful signal analysis technique, for improving the laser welding process monitoring. We briefly recall the fundamental concepts of the theory of time-frequency representation, reporting some interestin...$28.00
ICALEO 2006 Paper #702 (Optics Evaluation for Multikilowatt Solid State and Fiber Lasers)
Optics Evaluation for Multikilowatt Solid State and Fiber Lasers
Authors:
Harald Schwede, PRIMES GmbH; Pfungstadt Germany
Reinhard Kramer, PRIMES GmbH; Pfungstadt Germany
Stefan Wolf, PRIMES GmbH; Pfungstadt Germany
Volker Brandl, PRIMES GmbH; Pfungstadt Germany
Otto Marten, PRIMES GmbH; Pfungstadt Germany
Presented at ICALEO 2006
Laser macro processing, cutting, welding, and drilling, with multikilowatt solid state and fiber lasers is gaining more and more acceptance in industry, e.g. car industry, aerospace industry, or ship yards because of increased performance, quality, and high reliability resulting in acceptable overall costs. Standard ...$28.00
ICALEO 2006 Paper #701 (Applicable Sensor for a Multivariate Process Controller)
Applicable Sensor for a Multivariate Process Controller
Authors:
Andreas Otto, Chair of Manufacturing Technology - University of Erlangen-Nuremberg; Erlangen Germany
Simon Dietrich, Chair of Manufacturing Technology - University of Erlangen-Nuremberg; Erlangen Germany
Presented at ICALEO 2006
Laser materials processing is a modern joining technology often applied in the automotive industry. The process result is influenced by the user defined process parameters on the on hand and uncontrollable disturbance variables on the other. Nowadays the user defines process parameters located well inside the process window thus not fully exploiting the process possibilities. The reason for th...$28.00
ICALEO 2006 Paper #605 (Fiber Laser Pick-and-Join Tool for Welding of Thermoplastics)
Fiber Laser Pick-and-Join Tool for Welding of Thermoplastics
Authors:
Alexander Olowinsky, Fraunhofer Institute for Laser Technology; Aachen Germany
Andrei Boglea, Fraunhofer Institute for Laser Technology; Aachen Germany
Luedger Bosse, Fraunhofer Institute for Laser Technology; Aachen Germany
Silvia Bou, ARC Seibersdorf Research GmbH; Seibersdorf Austria
Presented at ICALEO 2006
The increased complexity and rapid evolution of Microsystems ask for advanced assembly tools based on innovative concepts and methods. In the same time, laser welding of thermoplastics confirmed its advantages and experienced an increased industrial acceptance over the last years....$28.00
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