ENBIS-12 in Ljubljana

9 – 13 September 2012 Abstract submission: 15 January – 10 May 2012

Improving an Electron Beam Soldering Process by Design of Experiments

11 September 2012, 16:30 – 16:50

Abstract

Submitted by
Lluis Marco-Almagro
Authors
Pere Grima (Universitat Politècnica de Catalunya, Barcelona), Xavier Tort-Martorell (Universitat Politècnica de Catalunya, Barcelona), Lluís Marco-Almagro (Universitat Politècnica de Catalunya, Barcelona), Miguel Sarachaga (ITP)
Abstract
ITP (Industria de Turbopropulsores) is a company located in the Basque Country (north of Spain) dedicated to the production of engines for the aeronautic industry. One critical and expensive part, that has an irregular shape with an interior hole, is welded by an electron beam process. The number of parts that had to be reprocessed and repaired manually was too high. The team in charge conducted several studies to identify good process parameters and although some improvements were obtained the process continued to be unsatisfactory. They recognized the need to a more scientific approach. A sequential experimentation approach was used to learn more about the way the different process parameters affected the welding quality at different zones of the part. Even though there were a lot of restrictions - number of experiments and way to conduct them - and the process showed a very high variability the results were an important knowledge gain on how the process variables affected the welding quality. In the paper we will present the design and results. It is interesting to see how the welding parameters affect in different but related ways the response level and variability at different part locations.
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