ICALEO 2009 Paper #105 (Monitoring of Hybrid Laser-Arc Welding of Galvanized Steels in a Gap-Free Lap Joint Configuration)
Monitoring of Hybrid Laser-Arc Welding of Galvanized Steels in a Gap-Free Lap Joint Configuration
Authors:
Shanglu Yang, Southern Methodist University; Dallas TX USA
Rouzbeh Sarrafi, -; -
Radovan Kovacevic, -; -
Presented at ICALEO 2009
Hybrid laser-arc Welding of galvanized steels in a gap-free lap joint configuration is a complicated welding process, which is involved in many welding parameters such as laser power, welding speed as well as the distance between laser beam and GTAW torch. Furthermore, the dynamic behaviors of the molten pool, which reflect the stability of the welding process, is significantly affected by the dynamic behaviors of highly-pressurized z...$28.00
ICALEO 2009 Paper #106 (High Brightness Hybrid Welding of Steel)
High Brightness Hybrid Welding of Steel
Authors:
Brian Victor, EWI; Columbus OH USA
Brad Nagy, EWI; Columbus OH USA
Stan Ream, EWI; Columbus OH USA
Dave Farson, Ohio State University; Columbus OH USA
Presented at ICALEO 2009
With the increasing power and performance of high-brightness solid-state lasers, laser-GMAW hybrid welding is becoming more practical for thick-section welding applications. This study evaluated hybrid welding of steel butt joints with a 10kW fiber laser. Welding trials were conducted to evaluate the effect that beam-to-wire distance and process orientation (arc-leading vs. laser-leading) had on the hybrid process. Both full and par...$28.00
ICALEO 2009 Paper #107 (On the Meaning of Zinc Coatings in Hybrid Welding of Aluminium to Steel)
On the Meaning of Zinc Coatings in Hybrid Welding of Aluminium to Steel
Authors:
Frank Vollertsen, BIAS GmbH; Bremen Germany
Claus Thomy, BIAS GmbH; Bremen Germany
Presented at ICALEO 2009
Laser MIG hybrid welding was recently suggested as a feasible process for joining of aluminium to steel for both structural and tailored blank applications. In this process, the aluminium is molten to create a brazed bond to the zinc-coated steel sheet, which remains solid. To further investigate the effect of process parameters, laser power, MIG arc power, wire feed rate, welding speed and arc position relative to the abutting edges were varied for the case of butt joints of aluminium alloy AA 6...$28.00
ICALEO 2009 Paper #1101 (Fiber Laser Assisted Machining of Silicon Nitride)
Fiber Laser Assisted Machining of Silicon Nitride
Authors:
Federico Sciammarella, Northern Illinois University; DeKalb IL USA
Michael Matusky, Northern Illinois University; Dekalb IL USA
Presented at ICALEO 2009
Laser Assisted Machining (LAM) of ceramics is an important area of research concerning the improvement upon conventional diamond grinding machining processes. The problems associated with the machinability of these advanced ceramic materials, specifically silicon nitride (Si3N4), have already lead to previous research work done with LAM. Utilizing the advent of high power fiber diode lasers, current research can now be completed outside the realm of traditional lasers such...$28.00
ICALEO 2009 Paper #1102 (Assessment of Part Quality in Laser Assisted Milling of Silicon Nitride Ceramic)
Assessment of Part Quality in Laser Assisted Milling of Silicon Nitride Ceramic
Authors:
Budong Yang, Kansas State University; Manhattan KS USA
Jiangang Sun, Argonne National Laboratory; Argonne IL USA
Elizabeth Frink, Kansas State University; Manhattan KS USA
Shuting Lei, Kansas State University; Manhattan KS USA
Kevin Lease, Kansas State University; Manhattan KS USA
Presented at ICALEO 2009
Due to the high brittleness of ceramic materials, the performance of ceramic components is very sensitive to machining damage. As laser assisted machining (LAM) poises to become a potentially cost-effective machining process for structural ceramics such a...$28.00
ICALEO 2009 Paper #1103 (Laser-based Machining of Fine Features Scales for High Precision Optical Position Encoders)
Laser-based Machining of Fine Features Scales for High Precision Optical Position Encoders
Authors:
Stephanie Giet, Heriot Watt University; Edinburgh Scotland
Charalampos Michakis, Heriot Watt University; Edinburgh Scotland
Jonathan Parry, Heriot Watt University; Edinburgh Scotland
Matthew Kidd, Renishaw Plc; Edinburgh Scotland
A. Ellin, -; -
Jonathan Shephard, Heriot Watt University; Edinburgh Scotland
Nick Weston, Renishaw Plc; Edinburgh Scotland
Duncan Hand, Heriot Watt University; Edinburgh Scotland
Presented at ICALEO 2009
High precision optical motion encoders provide reliable high-accuracy positio...$28.00
ICALEO 2009 Paper #1104 (High Pulse Energy (HPE) Picosecond (ps) Laser)
High Pulse Energy (HPE) Picosecond (ps) Laser
Authors:
Joyce Kilmer, Photonics Industries International, Inc.; Bohemia NY USA
Santosh Pisharody, Photonics Industries International, Inc.; Bohemia NY USA
Yusong Yin, Photonics Industries International, Inc.; Bohemia NY USA
Presented at ICALEO 2009
High Pulse Energy (HPE) Picosecond (ps) lasers are effective tools for processing a wide range of materials ranging from brittle samples that exhibit chipping/cracking to metals or composite materials such as the novel thin film solar cell material, Copper indium gallium selenide (CIGS), which suffer thermal deformation from long pulse laser processing. Mechanically machining me...$28.00
ICALEO 2009 Paper #1105 (Overcoming Limits in Processing of Advanced Material Geometries)
Overcoming Limits in Processing of Advanced Material Geometries
Authors:
Henk Kettelarij, Philips Applied Technologies; Eindhoven Netherlands
Presented at ICALEO 2009
Standard laser processing technologies available on industrial scale often cannot fulfill specific requirements for processing advanced material geometries. A number of dedicated hardware and software solutions to overcome these limitations have been developed within Philips Applied Technologies. In this presentation some of these developments will be discussed. Maximizing processing speed for accurate micromachining of funnel shaped holes requires in depth knowledge of scanner dynamics. By carefully designing scanner tracks with...$28.00
ICALEO 2009 Paper #1201 (New Low-cost CO2 Beam Profiler Eliminates Need for Acrylic Mode Burns)
New Low-cost CO2 Beam Profiler Eliminates Need for Acrylic Mode Burns
Authors:
Lawrence Green, Ophir-Spiricon, Inc; Logan UT USA
Presented at ICALEO 2009
Acrylic Mode Burns have historically been universally used because they are the lowest cost alternative to the budget-minded end user. This method, however has been cited for producing dangerous, cancer-causing airborne materials, and is not a real time technology. On the other hand, Real-time beam profiling has been historically too expensive for the average user to acquire. We discuss a new technology that enables the design of a new low-cost real time CO2 high power beam profiler that is within reach of almost all end-users. This design do...$28.00
ICALEO 2009 Paper #1202 (Novel Beam Analysis Applications and Hardware)
Novel Beam Analysis Applications and Hardware
Authors:
Thomas Kugler, Laser Mechanisms, Inc; Farmington Hills MI USA
Presented at ICALEO 2009
Off-the-shelf beam analysis systems work very well in investigating and measuring collimated laser beam spatial profiles, focus spot spatial profiles, and the waist caustic. These standard systems have some shortcomings, however, related to viewing very small focus spot sizes at any wavelength, but especially at 10.6um. Another problem that these beam analysis systems can solve is alignment of optics and other components that can be damaged by high power beams if improperly set-up. This presentation will investigate the use of novel but simple imaging ...$28.00