Increased stability in laser metal wire deposition through feedback from optical measurements
Artikel i vetenskaplig tidskrift, 2010

Robotized laser metal-wire deposition is a fairly new technique being developed at University West in cooperation with Swedish industry for solid freeform fabrication of fully densed metal structures. It is developed around a standard welding cell and uses robotized fiber laser welding and wire filler material together with a layered manufacturing method to create metal structures. In this work a monitoring system, comprising two cameras and a projected laser line, is developed for on-line control of the deposition process. The controller is a combination of a PI-controller for the bead width and a feed-forward compensator for the bead height. It is evaluated through deposition of single-bead walls, and the results show that the process stability is improved when the proposed controller is used. (C) 2009 Elsevier Ltd. All rights reserved.

power diode-laser

Process control

Metal wire

Robotic

fabrication

Machine vision

part

Laser deposition

qualification

powder deposition

welding equipment

temperature

Författare

A. Heralic

Högskolan Väst

A. K. Christiansson

Högskolan Väst

M. Ottosson

Högskolan Väst

Bengt Lennartson

Chalmers, Signaler och system, System- och reglerteknik, Automation

Optics and Lasers in Engineering

0143-8166 (ISSN)

Vol. 48 478-485

Styrkeområden

Produktion

Ämneskategorier

Atom- och molekylfysik och optik

DOI

10.1016/j.optlaseng.2009.08.012