Navigation path

Themes
Agriculture & food
Energy
Environment
ERA-NET
Health & life sciences
Human resources & mobility
Industrial research
  Building & construction
  Coal & steel
  Industrial processes & robotics
  Materials & products
  Nanotechnology
  Standards, measures & testing
  Other
Information society
Innovation
International cooperation
Nanotechnology
Pure sciences
Research infrastructures
Research policy
Science & business
Science in society
Security
SMEs
Social sciences and humanities
Space
Special Collections
Transport

Countries
Countries
  Argentina
  Australia
  Austria
  Belarus
  Belgium
  Benin
  Botswana
  Brazil
  Bulgaria
  Cameroon
  Canada
  Chile
  China
  Colombia
  Croatia
  Cyprus
  Czech Republic
  Denmark
  Egypt
  Estonia
  Finland
  France
  Georgia
  Germany
  Ghana
  Greece
  Hungary
  Iceland
  India
  Ireland
  Israel
  Italy
  Japan
  Kazakhstan
  Kenya
  Korea
  Latvia
  Lichtenstein
  Lithuania
  Luxembourg
  Madagascar
  Malta
  Mexico
  Montenegro
  Morocco
  Namibia
  Netherlands
  Nigeria
  Norway
  Peru
  Poland
  Portugal
  Romania
  Russia
  Senegal
  Serbia
  Slovakia
  Slovenia
  South Africa
  Spain
  Sri Lanka
  Swaziland
  Sweden
  Switzerland
  Taiwan
  Tanzania
  Tunisia
  Turkey
  Uganda
  Ukraine
  United Kingdom
  United States


This page was published on 20/02/2007
Published: 20/02/2007

   Industrial research

Last Update: 20-02-2007  
Related category(ies):
Industrial research  |  Success stories  |  International cooperation

 

Add to PDF "basket"

Europeans link lamp and laser for better welding system

The Russian satellite maker, NPO Lavochkin, has entered into an agreement with local and foreign experts for the production of a new light-laser welding system that uses strong polychromatic energy sources. From a local perspective, the Sarov-based All-Russia Research Institute of Experimental Physics is providing its expertise, while Professor Antonio Lapucci of the Italian Institute of Applied Optics in Florence and Professor Ulrich Delthey, the Director of the German Welding Institute in Aachen, are offering their know-how. The project will effectively help players to overcome any problems that once plagued the laser welding industry.

The new approach is expected to raise industry competitiveness. © Matt+
The new approach is expected to raise industry competitiveness.
With funding provided by the International Science and Technology Centre, the project consists of a complex involving Nd-YAG-laser and a special light module. The former is a neodymium-yttrium aluminium garnet laser that carries out the spot weld, while the latter, whose spectrum can be changed, is a strong light source.

To ensure automatic welding according to a preset programme, the complex has been equipped with the necessary materials and software. An initial experimental version of the complex has already been developed and is being tested by NPO Lavochkin researchers.

The method basically centres on the use of the second light source for radiation, as it can heat a weld area and its surroundings instantaneously. Temperatures can top the 1,000-degree mark. The experts claim that this method eliminates the need to temper ready products and results in fewer defects forming under the welding of cold parts.

Welders are aware that proper heating of parts leads to better weld-join quality. However, for some time, welders have questioned how parts can be heated rapidly and successfully if they are made from different solid materials, like glass, or from different alloys, like invar, when their dimensions cannot change despite being heated. The concern was how to heat parts to high temperatures without damaging them.

Enter Valentin Sysoev, the head of the Analytical Department, who along with his colleagues offered a solution to the problem. According to Sysoev, using the beam of a powerful lamp on the surface to be welded would heat the object to the right temperature. The researchers assert that what is needed is for energy sources to be used to heat surfaces, not weld them. The spot of the weld and the surrounding area will be smoother when the temperature drops, they say. The end result is improved weld quality.

Overall, the new method will prove to be competitive, yet effective for all future laser welding processes, without compromising on quality.

Convert article(s) to PDF

No article selected


loading


Search articles

Notes:
To restrict search results to articles in the Information Centre, i.e. this site, use this search box rather than the one at the top of the page.

After searching, you can expand the results to include the whole Research and Innovation web site, or another section of it, or all Europa, afterwards without searching again.

Please note that new content may take a few days to be indexed by the search engine and therefore to appear in the results.

Print Version
Share this article
See also

International Science and Technology Centre
Thermal eye on weld quality





  Top   Research Information Center