PICALO 2006 Paper #M401 (A User-friendly Simulation Tool to Facilitate Writing of Complex Part Programs for Laser Micromachining)

A User-friendly Simulation Tool to Facilitate Writing of Complex Part Programs for Laser Micromachining
Authors:
Richard Hume, IRIS, Swinburne Univ. of Technology; Deepdene, Victoria Australia
Jason Hayes, IRIS, Swinburne Univ. of Technology; Hawthorn, Victoria Australia
Pio Iovenitti, IRIS, Swinburne Univ. of Technology; Hawthorn, Victoria Australia
Presented at PICALO 2006

Excimer micromachining tools used to produce micromachined parts are often controlled by manually written numerical control (NC) part programs in RS-274 "G" and "M" codes, or NC-code. The manual creation of the part programs in NC-code is a time-consuming process for users and relies on their exper...

PICALO 2006 Paper #M402 (Micro Joining and Cutting with a Single Mode Fiber Laser)

Micro Joining and Cutting with a Single Mode Fiber Laser
Authors:
Mohammed Naeem, GSI Group, Inc.; Rugby Great Britain
Presented at PICALO 2006

Since the early developments of laser micro machining, the lamp pumped pulsed Nd: YAG laser has been the source of choice. Single mode fiber lasers have recently emerged as potential alternative sources for laser micro machining. These lasers with diffraction limited beam quality offer many advantages such as small spot size, high power density, enhanced processing speeds, reduced heat affected zone for both cutting and joining applications respectively. In this work, we will provide cutting and welding data achieved with a 100W single mode fiber for a ...

PICALO 2006 Paper #M404 (Optical Surface Profilometry of Low Reflectance Materials - Evaluation as a Laser Processing Diagnostic)

Optical Surface Profilometry of Low Reflectance Materials – Evaluation as a Laser Processing Diagnostic
Authors:
Adam Joyce, Department of Physics; Sydney Australia
Deb Kane, Macquarie University; Sydney Australia
Presented at PICALO 2006

Optical surface profilometry is a technique which has advantages over other profilometry techniques (stylus profilometry, AFM) of being non contact and being able to profile comparatively large areas in a single "z-scan". Thus, it is employed in monitoring surface quality and measuring surface form in high technology manufacturing processes and quality assurance, as well as in research and development contexts. Its application to optical materia...

PICALO 2006 Paper #Plenary (Femtosecond Pulsed Laser Induced Shape Change of Metallic Nanoparticles and its Application to Optical Data Storage)

Femtosecond Pulsed Laser Induced Shape Change of Metallic Nanoparticles and its Application to Optical Data Storage
Authors:
James Chon, Swinburne Univ. of Tech.; Hawthorn Australia
Craig Bullen, Swinburne University of Technology; Hawthorn Australia
Min Gu, Swinburne University of Technology; Hawthorn Australia
Presented at PICALO 2006

Metallic nanoparticles exhibit fascinating optical properties due to the surface plasmons * the collective oscillation of electron cloud within the particle. Surface plasmon can be at a resonant condition with the driving electromagnetic wave, and its resonant peak is shown to be tunable at various wavelengths of light with the shape a...

PICALO 2006 Paper #Plenary (Holistic Development of High Power Laser Sources and Corresponding Applications)

Holistic Development of High Power Laser Sources and Corresponding Applications
Authors:
Reinhart Poprawe, Fraunhofer ILT; Aachen Germany
Peter Loosen, Fraunhofer-Institute für Laser Technology; Aachen Germany
Wolfgang Schulz, Fraunhofer-Institute für Laser Technology; Aachen Germany
Presented at PICALO 2006

With the advent of high power diode lasers of lifetimes in excess of 10,000 hours at long term operational power levels in the range of 100W per diode bar, diode pumped concepts moved into their rightful role as next generation sources. The main reason for this trend is the combination of laser efficiencies in the range of 15 to 25% at powers of several kW with t...

PICALO 2006 Paper #Plenary (Laser Applications in Additive Manufacturing: Spanning Microns to Meters)

Laser Applications in Additive Manufacturing: Spanning Microns to Meters
Authors:
James Sears, South Dakota
School of Mines & Technology; Rapid City SD USA
Presented at PICALO 2006

Lasers are currently being applied in many aspects of conventional material processing including cutting, welding, drilling and machining. In recent years laser have been increasingly applied in the development of additive manufacturing technologies ranging from rapid prototyping to rapid manufacturing. The Laser additive manufacturing (LAM) technologies encompass a wide range of applications on scales that cover six orders of magnitude from microns to meters. LAM technologies are processes that use computer contr...

PICALO 2006 Paper #Plenary (Lithography by Maskless Laser Direct Writing)

Lithography by Maskless Laser Direct Writing
Authors:
Andreas Ostendorf, Laser Zentrum Hannover E.V.; Hannover Germany
Frank Meyer, Laser Zentrum Hannover e.V.; Hannover Germany
Juergen Koch, Laser Zentrum Hannover e.V.; Hannover Germany
Boris N. Chichkov, Laser Zentrum Hannover e.V.; Hannover Germany
Presented at PICALO 2006

Conventional lithography by laser mask projection has several drawbacks in terms of flexibility and costs which result in its use only for mass production. Small batches can be processed more easily and cost effectively by using direct laser writing. Laser direct ablation of resists and direct laser photopolymerisation can be used to ...

PICALO 2008 Paper #1001 (Comparative Study of Techniques for Wear Minimisation of Engine Parts)

Comparative Study of Techniques for Wear Minimisation of Engine Parts
Authors:
Aiping Wu, Beijing Insitute of Opto-Electronic Technology; Beijing Peoples Republic of China
Martin Dahmen, Fraunhofer-Institut Lasertechnik; 52074 Aachen Germany
Stefan Kaierle, Fraunhofer-Institut Lasertechnik; 52074 Aachen Germany
Wenjin Liu, Department of Mechanical Engineering, Qinghua University; Beijing Peoples Republic of China
Yi Shen, February 7Th Railway Transportation Equipment; Beijing Peoples Republic of China
Presented at PICALO 2008

In order to increase wear resistance investigations of locomotive engine parts on the comparison of different technique...

PICALO 2008 Paper #1004 (Integrated Heat Treatment - Comparison of Different Machine Concepts)

Integrated Heat Treatment – Comparison of Different Machine Concepts
Authors:
Jan Hannweber, Fraunhofer Iws; Dresden Germany
Marko Seifert, Fraunhofer I W S; Dresden Germany
Steffen Bonss, Fraunhofer IWS; Dresden Germany
Udo Karsunke, Fraunhofer Iws; Dresden Germany
Berndt Brenner, Fraunhofer I W S; Dresden Germany
Eckhard Beyer, Fraunhofer I W S; Dresden Germany
Presented at PICALO 2008

Heat treatment of machine components or automotive parts traditionally is done at separate facilities or companies. Very effective manufacturing becomes possible if heat treatment processes can be integrated in line to avoid logistics and to sav...

PICALO 2008 Paper #1005 (Laser Material Processing in the Aero Engine Industry. Established, Cutting-Edge and Emerging Applications.)

Laser Material Processing in the Aero Engine Industry. Established, Cutting-Edge and Emerging Applications.
Authors:
Karl-Hermann Richter, MTU Aero Engines; Munich Germany
Presented at PICALO 2008

Laser machining processes are widely used in the manufacture and repair of aero engine components. This presentation provides examples of well-established, cut-ting-edge and emerging laser machining processes. A well-established process is laser drilling which has been in use for more than 25 years to produce cooling holes in combustors and particularly in high-pressure turbine (HPT) blades and vanes. To enhance the cooling efficiency a novel laser machining technique has been devel-oped to produce sh...