PICALO 2006 Paper #106 (Enhancement of Weld Seam Quality by Appropriate Laser Beam Guiding for Contour Welding of Thermoplastics)

Enhancement of Weld Seam Quality by Appropriate Laser Beam Guiding for Contour Welding of Thermoplastics
Authors:
Alexander von Busse, Laser Zentrum Hannover e.V.; Hannover Germany
Mireia Fargas, Laser Zentrum Hannover E.V.; Hannover Germany
Oliver Meier, Laser Zentrum Hannover e.V.; Hannover Germany
Ben Boese, Laser Zentrum Hannover e.V.; Hannover Germany
Presented at PICALO 2006

Laser transmission welding (LTW) of thermoplastics is gaining increasingly importance as an alternative welding process in comparison to the conventional processes (like heated tool welding, friction welding or induction welding) due to its advantages as high flexibility, low mec...

PICALO 2006 Paper #107 (Transmission Laser Welding of Polymers using Laser Additives)

Transmission Laser Welding of Polymers using Laser Additives
Authors:
Peter Roberts, BASF; Melbourne Australia
Simon Doe, CSIRO; Adelaide Australia
Presented at PICALO 2006

Many polymers need to be joined allowing complex shapes to be processed, and welding is one process that may be employed. Transmission laser welding of thermoplastic polymers is a well established process, and is often used. To ensure that the weld occurs between the layers of plastic it is necessary for one of the plastics to be transmissive to laser light and the other to absorb the laser energy, to ensure that the beam focuses on the joint region. The traditional method has been to load the lower component wi...

PICALO 2006 Paper #108 (Comparison of Linear and Spinning Laser Beam Technologies for Welding of Thermoplastics to Timber)

Comparison of Linear and Spinning Laser Beam Technologies for Welding of Thermoplastics to Timber
Authors:
Bjoern Kretschmer, Swinburne University of Technology; Melbourne Australia
Milan Brandt, IRIS, Swinburne Univ. of Technology; Melbourne Australia
A. Ostendorf, Laser Zentrum Hannover; Hannover Germany
D. Herzog, Laser Zentrum Hannover; Hannover Germany
J. Harris, IRIS, Swinburne Univ. of Technology; Melbourne Australia
S. Barcikowski, Laser Zentrum Hannover; Hannover Germany
Presented at PICALO 2006

The fundamentals of the spinning laser beam process for welding of wood fiber composites to thermoplastics are discussed in this...

PICALO 2006 Paper #201 (Analysis and Digitalization of Expert's Skills for Laser Welding Using Analytic Hierarchy Process (AHP))

Analysis and Digitalization of Expert’s Skills for Laser Welding Using Analytic Hierarchy Process (AHP)
Authors:
Naoki Seto, National Institute of AIST, Digital Manufacturing Research Center; Tsukuba, Ibaraki Japan
Shingo Hirose, National Institute of AIST; Tsukuba, Ibaraki Japan
Kazuo Mori, National Institute of AIST, Digital Manufacturing Research Center; Tsukuba, Ibaraki Japan
Presented at PICALO 2006

In laser welding, the operator set welding parameters based on his long experience and knowledge before the operation. Since the parameter setting effects on welding quality greatly, it is very important that expert's experience and knowledge is expected to be transf...

PICALO 2006 Paper #201 (Analysis and Digitalization of Expert's Skills for Laser WeldinPICALO 2006 Paper #803 (Integrated Heat Treatment - System for Precise Hardening of Unique Tools or Parts) Using Analytic Hierarchy Process (AHP))

Integrated Heat Treatment – System for Precise Hardening of Unique Tools or Parts
Authors:
Jan Hannweber, Fraunhofer IWS; Dresden Germany
Marko Seifert, Fraunhofer IWS; Dresden Germany
Steffen Bonss, Fraunhofer-Institute Material & Beam Technology; Dresden Germany
Udo Karsunke, Fraunhofer IWS; Dresden Germany
Eckhard Beyer, Fraunhofer IWS; Dresden Germany
Presented at PICALO 2006

Heat treatment with high power diode lasers is well understood and several industrial applications suggest this technology being a reasonable complement in the field of surface heat treatment. But the special necessary knowledge for that technology is often a barrie...

PICALO 2006 Paper #202 (Effect of Laser Welding Parameters on Welding Defects Analyzed by the Analytic Hierarchy Process)

Effect of Laser Welding Parameters on Welding Defects Analyzed by the Analytic Hierarchy Process
Authors:
Naoki Seto, National Institute of AIST; Tsukuba, Ibaraki Japan
Kazuo Mori, Digital Manufacturing Research Center, National Institute of AIST; Tsukuba, Ibaraki Japan
Shingo Hirose, Digital Manufacturing Research Center, National Institute of AIST; Tsukuba, Ibaraki Japan
Presented at PICALO 2006

The analytic hierarchy process (AHP) has been widely used for the decision-making method. By adapting AHP in laser welding, we think that we can analyze expert's skills. In this presentation, we investigate the effect of laser parameters on welding defects using AHP in case o...

PICALO 2006 Paper #203 (Effects of Strain Rate on the Properties of Laser Welded High Pressure Die Cast AM50 and AM60 Alloys)

Effects of Strain Rate on the Properties of Laser Welded High Pressure Die Cast AM50 and AM60 Alloys
Authors:
William (Wei) Song, CRC CAST, Industrial Research Institute Swinburne (IRIS); Hawthorn, VIC Australia
Yvonne Durandet, CRC CAST, IRIS, Swinburne Univ. of Technology; Hawthorn, VIC Australia
Jim Harris, CRC CAST, IRIS, Swinburne Univ. of Technology; Hawthorn Australia
Milan Brandt, CRC CAST, Industrial Research Institute Swinburne (IRIS); Hawthorn, VIC Australia
Presented at PICALO 2006

The influence of strain rate on the properties of laser welded AM50 and AM60 magnesium alloys has been investigated. Butt welding without filler material was conduc...

PICALO 2006 Paper #204 (The Effects of Laser Process Parameters on the Weldability of Lap Joints between Aluminum Alloy (AA5052) and Magnesium Alloy (AZ31B))

The Effects of Laser Process Parameters on the Weldability of Lap Joints between Aluminum Alloy (AA5052) and Magnesium Alloy (AZ31B)
Authors:
Han-Sur Bang, Chosun University; Gwangju Korea
Nazmul Alam, CSIRO; Adelaide Australia
Young-Pyo Kim, CSIRO; Adelaide Australia
Presented at PICALO 2006

In the automotive industries, one of the main issues is to reduce the weight of structures for saving fuel consumption, prevention of air pollution and improvement of performance. For this purpose, many efforts have been tried to substitute standard material of car body by using light metal alloys. Therefore, technical and economical needs for joining of dissimilar metals by joini...

PICALO 2006 Paper #301 (Laser Cladding Repair of LP Steam Turbine Blades)

Laser Cladding Repair of LP Steam Turbine Blades
Authors:
James Harris, Swinburne University of Technology; Melbourne Australia
S. Sun, IRIS, Swinburne Univ. of Technology; Melbourne Australia
B. Dempster, IRIS, Swinburne Univ. of Technology; Melbourne Australia
Milan Brandt, IRIS, Swinburne Univ. of Technology; Melbourne Australia
Presented at PICALO 2006

We have investigated the potential of laser cladding to deposit a high quality and erosion resistant protection shield on the leading edge of LP turbine blades. Laser cladding offers unique advantages over the conventional techniques. The project to-date has demonstrated the feasibility of in-situ repa...

PICALO 2006 Paper #302 (Laser Cladding and Laser-induced Foaming of Titanium for Biomedical Applications)

Laser Cladding and Laser-induced Foaming of Titanium for Biomedical Applications
Authors:
Gerrit Hohenhoff, Laser Zentrum Hannover E.V.; Hannover Germany
Presented at PICALO 2006

High specific strength, low density and excellent corrosion resistance are three of the outstanding properties of titanium. Because of these properties titanium has found a wide range of application. Because of its low density and high absorbance for kinetic energy cellular structures also have an increasing potential for application. Up to now especially foaming of complex devices shows the limitations of conventional foaming processes. Rapid manufacturing is used to build up individual objects for special applications. Because of the individuality of creatures individual prostheses should be used to replace defective human joints. For a long durability the implants have to be adapted macroscopically to the elasticity of human bone. To build up such prostheses the three upcoming technologies have to be combined. In a laser cladding process a massive titanium structure will be built up to a scaffold and filled with titanium foam induced by laser beam. To foam the titanium by laser beam a blowing agent has to be added to the titanium powder. With the combination of laser cladding and laser-induced foaming in a rapid prototyping process the rapid manufacturing of individual prostheses with adapted elasticity can be realized.