POLITESI Politecnico di Milano Servizi Bibliotecari di Ateneo Servizi Bibliotecari di Ateneo
 
   ALL THESES       POST GRADUATE THESES       DOCTORAL THESES   
My POLITesi
authorized users
italiano
Please use this identifier to cite or link to this thesis: http://hdl.handle.net/10589/87601

Author: FERRARINI, LUCA
Supervisor: PREVITALI, BARBARA
Scientific Disciplinary Sector: ING-IND/16 TECNOLOGIE E SISTEMI DI LAVORAZIONE
Date: 18-Dec-2013
Academic year: 2012/2013
Title: Characterization of the laser dimpling process on galvanized steels for automotive applications
English abstract: The laser welding of zinc coated steels in lap joint configuration poses serious problems, due to the difference between the melting temperature of the steel (1500°C) and the vaporizing temperature of the zinc (906°C). The laser dimpling technique was studied. This solution is used to create protrusions on the surface of one of the two parts that work as spacers, allowing the escape of the zinc vapors from the joint, avoiding weld defects. The influence of the laser parameters on the height of the protrusion was studied and regression models were drawn. In the last part of the dissertation the hardness of the dimples was measured and a prediction of the tensile strength was made
Italian keywords: saldatura laser; saldatura laser remota; acciaio zincato; gap; laser dimpling; protuberanze; modelli di regressione
English keywords: laser welding; remote laser welding; zinc coated steel; gap; laser dimpling; protrusion; regression model
Language: eng
Appears in Collections:POLITesi >Tesi Specialistiche/Magistrali

Files in This Item:

File Description SizeFormatVisibility
2013_12_Ferrarini.pdfTesto della tesi85.85 MBAdobe PDFAccessible via Internet only by authorised users (AunicaLogin or Shibboleth) starting from: 28/11/2014 View/Open





 

  Support, maintenance and development by SURplus team @ CINECA- Powered by DSpace Software