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Title: Optical Measurement Technology For Aluminium Extrusions

Abstract

Optical measurement techniques such as laser scanning, structured light scanning and photogrammetry can be used for accurate shape control for aluminum extrusion and downstream processes. The paper presents the fundamentals of optical shape measurement. Furthermore, it focuses on how full-field in- and off-line shape measurement during pure-bending of aluminum extrusions has been performed with stripe projection (structured light) using white light. Full field shape measurement is difficult to implement industrially, but is very useful as a laboratory tool. For example, it has been clearly shown how moderate internal air pressure (less than 5 bars) can significantly reduce undesirable cross-sectional shape distortions during pure bending, and how buckling of the compressive flange occurs at an early stage. Finally, a stretch-bending set-up with adaptive shape control using internal gas pressure and optical techniques is presented.

Authors:
; ;  [1]
  1. Norwegian University of Science and Technology, Department of Engineering Design and Materials, Richard Birkelandsvei 2B, N-7491 Trondheim (Norway)
Publication Date:
OSTI Identifier:
21057062
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 907; Journal Issue: 1; Conference: 10. ESAFORM conference on material forming, Zaragoza (Spain), 18-20 Apr 2007; Other Information: DOI: 10.1063/1.2729578; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINIUM; ALUMINIUM ALLOYS; BENDING; BUCKLING; EXTRUSION; FLANGES; LASER RADIATION; OPTICS; PROCESS CONTROL; SHAPE

Citation Formats

Moe, Per Thomas, Willa-Hansen, Arnfinn, and Stoeren, Sigurd. Optical Measurement Technology For Aluminium Extrusions. United States: N. p., 2007. Web. doi:10.1063/1.2729578.
Moe, Per Thomas, Willa-Hansen, Arnfinn, & Stoeren, Sigurd. Optical Measurement Technology For Aluminium Extrusions. United States. doi:10.1063/1.2729578.
Moe, Per Thomas, Willa-Hansen, Arnfinn, and Stoeren, Sigurd. Sat . "Optical Measurement Technology For Aluminium Extrusions". United States. doi:10.1063/1.2729578.
@article{osti_21057062,
title = {Optical Measurement Technology For Aluminium Extrusions},
author = {Moe, Per Thomas and Willa-Hansen, Arnfinn and Stoeren, Sigurd},
abstractNote = {Optical measurement techniques such as laser scanning, structured light scanning and photogrammetry can be used for accurate shape control for aluminum extrusion and downstream processes. The paper presents the fundamentals of optical shape measurement. Furthermore, it focuses on how full-field in- and off-line shape measurement during pure-bending of aluminum extrusions has been performed with stripe projection (structured light) using white light. Full field shape measurement is difficult to implement industrially, but is very useful as a laboratory tool. For example, it has been clearly shown how moderate internal air pressure (less than 5 bars) can significantly reduce undesirable cross-sectional shape distortions during pure bending, and how buckling of the compressive flange occurs at an early stage. Finally, a stretch-bending set-up with adaptive shape control using internal gas pressure and optical techniques is presented.},
doi = {10.1063/1.2729578},
journal = {AIP Conference Proceedings},
number = 1,
volume = 907,
place = {United States},
year = {Sat Apr 07 00:00:00 EDT 2007},
month = {Sat Apr 07 00:00:00 EDT 2007}
}