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Resistance measurements for control of laser metal wire deposition

Petter Hagqvist ; Almir Heralic ; Anna-Karin Christiansson ; Bengt Lennartson (Institutionen för signaler och system, Automation)
Optics and Lasers in Engineering (0143-8166). Vol. 54 (2014), p. 62-67.
[Artikel, refereegranskad vetenskaplig]

A method for controlling robotized laser metal wire deposition on-line by electrical resistance metering is proposed. The concept of measuring the combined resistance of the wire and the weld pool is introduced and evaluated for automatic control purposes. Droplet formation, detachment of the wire from the weld pool and stubbing can be hard to avoid during processing due to the sensitive process and short reaction times needed for making on-line adjustments. The implemented system shows a possible route for automatic control of the process wherein such problems can be avoided automatically. The method proves to successfully adjust the distance between the tool and the workpiece through controlling the robot height position, thus increasing stability of the laser metal wire deposition process. (C) 2013 Elsevier Ltd. All rights reserved.

Nyckelord: Laser metal wire deposition, Automatic control, Resistance, Additive, manufacturing, DIODE-LASER, POWDER, SUPERALLOY



Denna post skapades 2014-01-17. Senast ändrad 2015-01-27.
CPL Pubid: 192753

 

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Institutioner (Chalmers)

Institutionen för signaler och system, Automation

Ämnesområden

Optik

Chalmers infrastruktur