"Sistem integrat de determinare a sudabilităţii cu fascicul laser a materialelor polimerice, de monitorizare şi control în timp real a procesului de sudare"


Rezultate etapa I


Lucrari publicate

 

SCIENTIFIC BULLETIN OF THE „POLITEHNICA” UNIVERSITY OF TIMISOARA, ROMANIA
Transactions on MECHANICS
Tom 52 (66) ISSN 1224 - 6077 Fasc. 7, 2007

PROCESS MODELING FOR LASER WELDING OF THERMOPLASTICS IN RAILWAY INDUSTRY

M.ILIE 1,2, V.STOICA 1

1 Politehnica University of Timisoara, Mechanical Faculty
1 Mihai Viteazu Bv., 300222, Timisoara, Romania, mariana.ilie@mec.upt.ro
2 ISIM - National R&D Institute for Welding and Material Testing
30, Mihai Viteazul Bv, 300222 Timisoara, Romania

Abstract: Due to increasing industrial acceptance of laser beam welding as a successful joining technique for thermoplastics materials, the research efforts are oriented towards process optimization. In order to broaden process understanding and to stimulate innovative technical developments, a modeling of the material behavior under laser irradiation is necessary. In the present study a thermal model is presented. The model uses as input data the laser beam characteristics obtained from an optical model which describes the laser beam scattering in the first component. Implementing this thermal model in a finite element based code, the developed temperature in the irradiated components can be estimated for different process parameters thus providing guidance on the process optimization to produce successful welds.

Keywords: thermal modeling, laser welding, polymers, process optimization

 

LASERAP 6, SEMINAIRE EUROPEEN - RECHERRCHE / INDUSTRIE
"La Maison du Beuvray - 1-5 octobre 2007"
ISBN: 978-973-625-785-7 vol. 2

Model based control of amorphous semitransparent polymers laser welding

M.ILIE 1, 2, V.STOICA 2 , S. MATTEI 3, D.DEHELEAN 1

1 National R&D Institute for Welding and Material Testing, Timisoara Romania
2 Polytechnic University of Timisoara, Timisoara Romania
3 Institut Carnot de Bourgogne UMR 5209 CNRS - Université de Bourgogne

Abstract: The main objective of this paper consist in presenting the development of an integrated system, hardware and software, which will permit to determine the laser beam weldability of amorphous semitransparent polymeric materials, according to their optical and thermal properties, to optimize the process parameters by numerical simulations and to control and monitor on-line the welding process. In order to accomplish this, several aspects are investigated: the particularity of laser-polymers interaction, both from optical and thermal point of view and the statistical analysis of influent process parameters which will indicate an optimal domain. Interconnecting all these data with those obtained from a real-time acquisition system (material temperature and process speed) an accurate model based control of the welding process can be ensured.

Keywords: laser welding, polymers, beam scattering, equivalent material

 


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