NEWS

27 - 28 May 2009, Lansdowne Park, Ottawa

The show was the tenth exhibition in the highly successful CANSEC series, representing product presentations and capability displays of Canada's leading edge defence and security technologies to a wide audience that includes Government agencies and Departments. The event was organized by CADSI (Canadian Association of Defence and Security Industries), the voice of Canada’s defence and security industries. KJ Laser Micromachining showcased its industrial capabilities and service offerings in laser micromachining and laser encoding.

www.defenceandsecurity.ca/index.php

Through the SMART Program, funding were provided by the Government of Ontario, Canadian Manufacturers & Exporters (CME) to help small and medium-sized manufacturers in Ontario improve their productivity so they can compete more effectively in the global economy. SMART funded productivity improvement projects such as lean design and lean manufacturing, quality improvement, energy efficiency, IT best practices, and environmental impact reduction. CME supported the best projects proposed to it, with 50% funding up to $50,000. KJ Laser Micromachining was awarded a funding for its activities to improve existing and to generate new laser micro machining capabilities via its innovative proprietary laser technology.

www.cme-smart.ca

KJ Laser Micromachining (a division of KJ Marketing Services), Toronto Ontario, has appointed Tuan Anh Mai to lead its Laser Micromachining/Laser Applications group. Tuan A. Mai has more than 20 years of experience in the field of lasers and laser material processing, with a focus in the development and customization of laser micromachining processes and systems. Tuan has vast experience in laser micromachining and laser applications ranging from laser micromachining of semiconductor, brittle and other difficult to machine materials, wafer dicing and development of the waterjet guided laser.

Tuan A. Mai received his Mechanical Engineering Degree at the University of Ilmenau (Germany) and his PhD in Materials Engineering at the University of Hannover (Germany). His excellent scientific background and extensive experience will allow Tuan Mai to continue to advance KJ Laser Micromachining capabilities to meet the stringent requirements of its customers and expand its laser micromachining service, breadth of application and customer base.

KJ Laser Micromachining is the Canadian leader in the laser machining of glasses, plastics, ceramics, rubbers and metals offering cutting, drilling, engraving, welding and laser polishing.

Laser application expert Tuan A. Mai has been named by KJ Marketing Services of Toronto to lead its KJ Laser Micromachining division. Mai, who has more than 20 years of experience in lasers and laser material processing, previously worked as project manager with Germany's Laser Zentrum Hannover, research scientist at the Singapore Institute of Manufacturing Technology, process development and applications manager at Advanced Laser Separation International and research and development manager for Synova. KJ Laser Micromachining laser machines metals, plastics, ceramics, rubbers and glasses. (9/4/2007)

View the News Brief: http://www.photonics.com/content/briefs/2007/September/4/88805.aspx

ARTICLES

"Toward Debris-free Laser Micromachining" (Industrial Laser Solutions, Vol. 23, No.1, p. 16-18, January 2008)

The characteristic noncontact and the much-localized heat input from a finely focused beam have made the laser a perfect choice for machining delicate components that require high accuracy and precision. Laser micromachining applications such as cutting, grooving, and drilling are mainly based on material removal via evaporation by high-intensity pulsed laser irradiation. Until now, the main obstacle in applying this technology has been debris formation, which is a result of the condensation of supercooled vapors, partially on the sample surface, partially in the gas phase, via collision with ambient gaseous molecules. The debris formation deteriorates the feature quality and functionality of the components. It also reduces ablation effi ciency because debris from the previous scan can block the laser-beam path for the next scan. Different techniques were described in this article and are relatively simple to use. To obtain a high-quality micromachining result, laser users should not focus only on choosing the appropriate laser or the correct laser parameters. The use of the presented techniques also should be considered in dealing with debris, recast, burrs, and thermal damage.

Laser surface remelting without additive material has been widely investigated and applied to improve the wear and corrosion properties of various materials. The improvement is due to the rapid melting and cooling, which modify the surface microstructure of the material. In comparison to conventional laser surface remelting, laser polishing requires, however, a more precise control of process parameters to control the surface temperature and the resulting molten depth.

Note: pdf-paper is available HERE