Optical sensor for detection of errors in Nd : YAG laser overlap welding of zinc-coated steel

Authors
Hand, DP Peters, C Fox, MDT Jones, JDC
Citation
Dp. Hand et al., Optical sensor for detection of errors in Nd : YAG laser overlap welding of zinc-coated steel, P I MEC E B, 214(9), 2000, pp. 793-798
Citations number
4
Categorie Soggetti
Engineering Management /General
Journal title
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART B-JOURNAL OF ENGINEERING MANUFACTURE
ISSN journal
09544054 → ACNP
Volume
214
Issue
9
Year of publication
2000
Pages
793 - 798
Database
ISI
SICI code
0954-4054(2000)214:9<793:OSFDOE>2.0.ZU;2-P
Abstract
Laser overlap welding of zinc-coated steel is an attractive process for the automotive industry, but specific problems can occur where apparently good welds may be produced but with no join between the two sheets of material. This paper describes a simple and reliable technique for detecting these e rrors by analysing the light generated by the welding process, using an opt ical sensor which is non-intrusive to the process.