ICALEO 2005 Paper #2103 (Theoretical Study of Aerodynamic Behaviour of Assist Gas During Laser Cutting)
Theoretical Study of Aerodynamic Behaviour of Assist Gas During Laser Cutting
Authors:
Ruslan Zhuk, NTUU 'KPI'; Kyiv Ukraine
Volodymir Kovalenko, Laser Technology Research Institute; Kyiv Kyiv Region Ukraine
Presented at ICALEO 2005
Cutting is one of the major laser applications which is extensively used nowadays due to its flexibility, accuracy and non-mechanical contact between laser beam and workpiece. Despite numerous experimental and theoretical investigations on dross and striations formation, which are significant factors influencing laser cutting quality, the understanding of these mechanisms leaves much to be desired. Modeling of laser cutting process can shed light on th...$28.00
ICALEO 2005 Paper #2102 (The Rapid Manufacture of Micro Hierarchical Structures by Selective Laser Melting)
The Rapid Manufacture of Micro Hierarchical Structures by Selective Laser Melting
Authors:
Chris Sutcliffe, The University of Liverpool; Liverpool UK
J. Todd, The University of Liverpool; Liverpool Great Britain
P. Fox, The University of Liverpool; Liverpool Great Britain
W. Brooks, The University of Liverpool; Liverpool Great Britain
W. Cantwell, The University of Liverpool; Liverpool Great Britain
R. Mines, The University of Liverpool; Liverpool Great Britain
Presented at ICALEO 2005
The Selective Laser Melting (SLM) process produces components using high melting point metal powders. This gives the ability to produce high-perfor...$28.00
ICALEO 2005 Paper #2101 (Importance of the Coupling Between the Induced Vapor Plume and the Melt Pool, for Nd-Yag CW Laser Welding)
Importance of the Coupling Between the Induced Vapor Plume and the Melt Pool, for Nd-Yag CW Laser Welding
Authors:
Remy Fabbro, LALP (CNRS) / Gip Gerailp; Arcueil Cedex France
Francis Briand, Air Liquide - CTAS; St OUEN L4AUMONE France
Sonia Slimani, Air Liquide - CTAS; St OUEN L'AUME France
Frederic Coste, LALP (CNRS) / Gip Gerailp; Arcueil France
Presented at ICALEO 2005
We have analyzed the effect of the induced vapor plume on the metallic pool during CW laser welding. We used diagnostics based on fast video imaging (4 kHz frame rate) of the vapor jet, the melt pool surface and the keyhole geometry (front wall inclination and the top and bottom dimen...$28.00
ICALEO 2005 Paper #207 (The Combi-Head: Truly Flexible Laser Processing by Cutting and Welding in a Single Machine with a Single Tool)
The Combi-Head: Truly Flexible Laser Processing by Cutting and Welding in a Single Machine with a Single Tool
Authors:
Dirk Petring, Fraunhofer Institute for Laser Technology ILT; Aachen Germany
Frank Schneider, Fraunhofer Institute for Laser Technology ILT; Aachen Germany
Christian Benter, Fraunhofer Institute for Laser Technology ILT; Aachen Germany
Reinhart Poprawe, Fraunhofer Institute for Laser Technology ILT; Aachen Germany
Presented at ICALEO 2005
There is a wide spectrum of laser processes, including removal, joining and surface treatment of matter, most of them well known to be productive, precise and last but not least flexible. This flexibility ...$28.00
ICALEO 2005 Paper #205 (Study of Metal Drilling Characteristics with Q-Switched CO2 Laser)
Study of Metal Drilling Characteristics with Q-Switched CO2 Laser
Authors:
Atsushi Sugihashi, Nippon Steel Corporation; Futtsu Chiba Japan
Koji Hirano, Nippon Steel Corporation; Futtsu Chiba Japan
Motoi Kido, Nippon Steel Corporation; Futtsu Chiba Japan
Naoya Hamada, Nippon Steel Corporation; Futtsu, Chiba Japan
Presented at ICALEO 2005
We studied metal drilling characteristics using Q-switched CO2 laser with the average output power of 1kW. A rotating chopper inserted in the cavity realized the Q-switch operation. The pulse repetition rate of the laser is as high as tens of kHz. The temporal waveform of the pulse is comprised of high-peak spike at the ve...$28.00
ICALEO 2005 Paper #203 (Application a High Brightness Yb Fibre Laser In High Speed Cutting of C-Mn Sheet Steel)
Application a High Brightness Yb Fibre Laser In High Speed Cutting of C-Mn Sheet Steel
Authors:
M. Sparkes, Univ. of Cambridge; Cambridge UK
William O'Neill, Univ. of Cambridge; Cambridge UK
Presented at ICALEO 2005
Previous work using high quality CO2 lasers have shown high levels of performance when cutting thin section steels in the range 0.5-1.0mm. However, the use of the CO2 lasers is compromised as a result of the reduced operating window produced by the need for short-focal length lenses and the deleterious development of intense plasma in the cutting zone. It is thought that the application of a high power Yb fibre laser could offer substantial physical benefits such as l...$28.00
ICALEO 2005 Paper #202 (Enhanced Cutting of Polycrystalline Diamond with a Q-Switched Diode Pumped Solid State Laser)
Enhanced Cutting of Polycrystalline Diamond with a Q-Switched Diode Pumped Solid State Laser
Authors:
Jozef Wendland, Powerlase Ltd; Crawley West Sussex UK
Matt Henry, Powerlase Ltd; Crawley West Sussex Great Britain
Paul Harrison, Powerlase Ltd; Crawley West Sussex UK
Michael Brownell, Powerlase Ltd; Crawley West Sussex UK
Presented at ICALEO 2005
In this paper a progressive empirical study is conducted in refining the laser cutting of Polycrystalline Diamond (PCD) in ongoing work. PCD is one of the hardest substances known and is used extensively in cutting tools for non-ferrous materials. It is extremely difficult to cut by conventional means and the c...$28.00
ICALEO 2005 Paper #201 (Chemistry in Laser Material Processing)
Chemistry in Laser Material Processing
Authors:
Wolfgang Danzer, Linde Gas AG; Unterschleissheim Germany
Presented at ICALEO 2005
High-speed film technique has been used to examine laser cutting and to understand the difference to oxy-fuel cutting. Chemical reactions during ignition phase of the cutting process are different as can be seen from the films resulting in different speeds. Also in laser welding chemical reactions steer processing speed and performance. Active substancies clearly affect the surface tensions and melt flow direction in laser welding of steel. In laser welding of aluminium ,in contrast, oxygen is not beneficial and molten aluminium oxides are pushed aside by the laser ...$28.00
ICALEO 2005 Paper #2006 (Distortion Minimisation and Shielding Gas Flow Optimisation in CO2-laser Remote Welding of Steel)
Distortion Minimisation and Shielding Gas Flow Optimisation in CO2-laser Remote Welding of Steel
Authors:
Claus Thomy, BIAS Bremer Institut fr angewandte Strahltechnik; Bremen Germany
Steffen Neumann, BIAS Bremer Institut fr angewandte Strahltechnik; Bremen Germany
Frank Vollertsen, BIAS Bremer Institut fr angewandte Strahltechnik; Bremen Germany
Thomas Seefeld, BIAS; Bremen Germany
Presented at ICALEO 2005
In CO2-laser remote welding, a laser beam is rapidly deflected by a system of moving mirrors and directed towards the workpiece over distances exceeding 1000 mm. From such an arrangement, various advantages and disadvantages arise.
On the one hand, ...$28.00
ICALEO 2005 Paper #2005 (Laser Braze Welding Using Hot (88%-Al,12%-Si) Filler Material to Join Steel with Aluminum)
Laser Braze Welding Using Hot (88%-Al,12%-Si) Filler Material to Join Steel with Aluminum
Authors:
Alexandre Mathieu, LTm-IUT Le Creusot; Le Creusot France
Jean-claude Viala, LMI; Villeurbanne France
Simone MatteLTm; Le Creusot France
Dominique Grevey, LTm; Le Creusot France
Presented at ICALEO 2005
New anti-pollution and energy saving laws impose reduction of fuel consumption for vehicles of the automobile industry. Reducing the weight of vehicle by introducing Aluminum parts into a steel car-body can be a solution for this reduction. Laser braze welding represent an adequate process than can be used to realize this kind of new structure.
The main pr...$28.00
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