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Increased stability in laser metal wire deposition through feedback from optical measurements

A. Heralic ; A. K. Christiansson ; M. Ottosson ; Bengt Lennartson (Institutionen för signaler och system, Automation)
Optics and Lasers in Engineering (0143-8166). Vol. 48 (2010), 4, p. 478-485.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: Laser deposition, Metal wire, Machine vision, Process control, Robotic, welding equipment, power diode-laser, powder deposition, fabrication, part, qualification, temperature



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Denna post skapades 2010-03-23. Senast ändrad 2011-01-14.
CPL Pubid: 118289

 

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Institutioner (Chalmers)

Institutionen för signaler och system, Automation

Ämnesområden

Produktion
Optik

Chalmers infrastruktur