ICALEO 2005 Paper #2305 (In-Process Monitoring and Adaptive Control for Lap Welds of Aluminum Alloy Sheets)
In-Process Monitoring and Adaptive Control for Lap Welds of Aluminum Alloy Sheets
Authors:
Yousuke Kawahito, JWRI, Osaka University; Ibaraki Osaka Japan
Seiji Katayama, JWRI, Osaka University; Ibaraki Osaka Japan
Presented at ICALEO 2005
A new procedure of in-process monitoring and adaptive control has been developed for laser micro-spot lap welding of A3003 aluminum alloy sheets. The objective is to stably produce sound partial- and full-penetration welds without through-holes. In partial-penetration welds, the reflected laser beam and the radiated heat from the welding area were effective as in-process monitoring signals in detecting melting and though-hole formation in the uppe...$28.00
ICALEO 2005 Paper #2304 (Monitoring of Nd:YAG Laser Spot Welding - Detection of Porosity Defect by Weld Sound)
Monitoring of Nd:YAG Laser Spot Welding - Detection of Porosity Defect by Weld Sound
Authors:
Tadashi Misu, Chiba Institute of Technology; Chiba Japan
Shunro Yoshioka, Chiba Institute of Technology; Narashino Chiba Japan
T. Tokunaga, Chiba Institute of Technology; Narashino Chiba Japan
Toshiyuki Miyazaki, Chiba Institute of Technology; Narashino Chiba Japan
Yosuke Kitamura, Chiba Institute of Technology; Narashino Japan
Presented at ICALEO 2005
The generation of porosity defect is detected by analyzing the generated sound in Nd:YAG laser spot welding of stainless steel sheet (AISI304). The welding is done by a single pulse. The short-Time Four...$28.00
ICALEO 2005 Paper #2301 (Sensor Integration for Robotic Laser Welding Processes)
Sensor Integration for Robotic Laser Welding Processes
Authors:
Dimitrios Iakovou, University of Twente; Enschede Netherlands
Presented at ICALEO 2005
The use of robotic laser welding is increasing among industrial applications, because of its ability to weld objects in three dimensions. Robotic laser welding involves three sub-processes: seam detection and tracking, welding process control, and weld seam inspection. Usually, for each sub-process, a separate sensory system is required. This may lead to heavy and bulky tools, whereas compact and light sensory systems are needed to reach sufficient accuracy and accessibility. In out solution we will integrate all these functions in one compact mu...$28.00
ICALEO 2005 Paper #2209 (Solidification Rate in Laser Welding and Its Influence on Aluminum Alloy 2024 Weld Quality)
Solidification Rate in Laser Welding and Its Influence on Aluminum Alloy 2024 Weld Quality
Authors:
Bin Hu, Netherlands Institute for Metals Research; Delft Netherlands
I. Richardson, Delft University of Technology; Delft Holland Netherlands
Presented at ICALEO 2005
Aluminium alloy 2024 is one of important heat treatable aluminium alloys with its strength gained from the precipitation hardening. Experiments were conducted on Nd:YAG laser keyhole welding of AA2024(T3) sheet of different thicknesses. It was found that the fusion zone of the weld becomes the weakest zone after welding due to the precipitate dissolution. The results obtained from the samples of different thickness show...$28.00
ICALEO 2005 Paper #2208 (In-Process Monitoring and Adaptive Control in Pulsed YAG Laser Butt Micro-Welding of Titanium)
In-Process Monitoring and Adaptive Control in Pulsed YAG Laser Butt Micro-Welding of Titanium
Authors:
Masayuki Kito, JWRI, Osaka University; Ibaraki Osaka Japan
Hiroshi Nakamura, Horikawa Inc.; Sabae Fukui Japan
Seiji Katayama, JWRI, Osaka University; Ibaraki Osaka Japan
Yousuke Kawahito, JWRI, Osaka University; Ibaraki Osaka Japan
Presented at ICALEO 2005
Titanium is used as glasses frames because of its lightweight and good mechanical properties. On the other hand, a fiber laser with high beam quality is a promising heat source to produce a sound weld of satisfactory depth with good surface appearances, narrow heat-affect zones and high strength. Ther...$28.00
ICALEO 2005 Paper #2206 (High-Frequency Beam Oscillating to Increase the Process Stability During Laser Welding with High Melt Pool Dynamics)
High-Frequency Beam Oscillating to Increase the Process Stability During Laser Welding with High Melt Pool Dynamics
Authors:
Heinz Haferkamp, Laser Zentrum Hannover e.V.; Hannover Germany
Olaf Berend, Laser Zentrum Hannover e.V.; Hannover Germany
Oliver Meier, Laser Zentrum Hannover e.V.; Hannover Germany
Lars Engelbrecht, Laser Zentrum Hannover e.V.; Hannover Germany
Presented at ICALEO 2005
Nd:YAG lasers with a double focus technique are usually used for welding of aluminium alloys, due to a low melt pool viscosity. For double focus welding, relatively high laser output powers and energy per section are necessary. Thus, techniques for reducing laser powe...$28.00
ICALEO 2005 Paper #2205 (Melt Pool Dynamics in High Speed Welding with Modern High Power Solid State Lasers)
Melt Pool Dynamics in High Speed Welding with Modern High Power Solid State Lasers
Authors:
Klaus Behler, University of Applied Sciences; Friedberg Germany
Peter Schaefer, Trumpf Laser; Schramberg Germany
Presented at ICALEO 2005
The quality of laser beam welded seams is strongly influenced by hydrodynamic processes of the liquid material. One phenomenon with negative effects on the seam quality is the so called humping effect which occurs at high welding speed. New types of solid state lasers are allowing reduced focus diameters and consequently higher beam intensities. These improvements can be transferred into increased welding speed. Under the aim to optimize the high speed wel...$28.00
ICALEO 2005 Paper #2204 (Tandem Laser Brazing of Heat-Resistant Alloys Using Precious Filler Metals)
Tandem Laser Brazing of Heat-Resistant Alloys Using Precious Filler Metals
Authors:
Kazuyoshi Saida, Osaka University; Suita Osaka Japan
Kazutoshi Nishimoto, Osaka University; Suita Osaka Japan
Woohyun Song, Osaka University; Suita Osaka Japan
Presented at ICALEO 2005
The diode laser brazing of heat-resistant alloys with precious filler metals has been conducted using the tandem beam which consisted of preheating beam and main brazing beam. The 1mm thick plates of Inconel 600 and A286 alloys were butt-brazed using the 0.5mm diameter Au-18%Ni, Ag-10%Pd and Ag-21%Cu-25%Pd filler metals with a brazing flux. The processing parameters of the tandem laser powers and the ...$28.00
ICALEO 2005 Paper #2202 (Induction Assisted Laser Beam Welding of High Strength Steel Sheets)
Induction Assisted Laser Beam Welding of High Strength Steel Sheets
Authors:
Oliver Meier, Laser Zentrum Hannover e.V.; Hannover Germany
Andreas Ostendorf, Laser Zentrum Hannover e.V.; Hannover Germany
Heinz Haferkamp, Laser Zentrum Hannover e.V.; Hannover Germany
Axel Bormann, Robert Bosch GmbH; Bamberg Germany
Presented at ICALEO 2005
Due to the high carbon levels of high-strength steels, laser beam welding of these materials generally leads to a substantial increase in hardness in the welding seam, which is often not acceptable. In order to achieve the required seam characteristics, process-technical solutions are necessary, which allow adaptation of th...$28.00
ICALEO 2005 Paper #2201 (Rationalizing Requirements for Gaps, Surface Offsets and Edge Radii in Miniature Laser Welded Components)
Rationalizing Requirements for Gaps, Surface Offsets and Edge Radii in Miniature Laser Welded Components
Authors:
Gerald Knorovsky, Sandia National Laboratories; Albuquerque NM USA
Allen Roach, Sandia National Laboratories; Albuquerque NM U.S.A.
Charles Robino, Sandia National Laboratories; Albuquerque NM U.S.A.
Jerome Norris, Sandia National Laboratories; Albuquerque NM U.S.A.
Presented at ICALEO 2005
In an ideal world, laser welds would always be made on perfect parts allowing no pre-weld gap, edge rounding or surface level offset. In the real world however, such deviations are not only unavoidable, but are subject to the cost/schedule/performance cons...$28.00
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