Penetration control in laser welding of sheet metal

Share/Save/Bookmark

Postma, S. and Aarts, R.G.K.M. and Meijer, Johan and Jonker, J.B. (2002) Penetration control in laser welding of sheet metal. Journal of laser applications, 14 (4). pp. 210-214. ISSN 1042-346X

[img]PDF
Restricted to UT campus only
: Request a copy
172Kb
Abstract:For economical reasons it is desirable to apply the highest possible speed during laser welding. Increasing the welding speed at a certain laser power might result in insufficient penetration of the weld. This work describes the design of a feedback controller, which is able to maintain full penetration in mild steel sheets. An optical detector, which is placed inside the Nd:Yttrium–aluminium–garnet laser source, measures the intensity of the weld-pool radiation through the optical fiber. This sensor signal is used as input of a feedback control system. A model, which describes the dynamic response of the welding process including the sensor and laser source dynamics, has been obtained, using system identification techniques. The input of this model is the laser power and the output is the modeled sensor signal. Based on this dynamic model a feedback controller is designed and implemented. The laser power is used as an actuator. The controller maintains full penetration during welding of tracks with disturbances like sudden artificial power fluctuations and sudden speed changes. This feedback controller opens the possibility to optimize the welding speed without risking lack of penetration
Item Type:Article
Copyright:© 2002 Laser Institute of America
Faculty:
Engineering Technology (CTW)
Research Group:
Link to this item:http://purl.utwente.nl/publications/79020
Official URL:http://dx.doi.org/10.2351/1.1493764
Export this item as:BibTeX
EndNote
HTML Citation
Reference Manager

 

Repository Staff Only: item control page

Metis ID: 207781