Penetration control in laser welding of sheet metal using optical sensors

Sjoerd Postma; Ronald G.K.M. Aarts; Johan Meijer; Ben Jonker; Wouter M. Zweers

doi:10.2351/1.5059767

Penetration control in laser welding of sheet metal using optical sensors

Sjoerd Postma, Ronald G.K.M. Aarts, Johan Meijer, Ben Jonker, Wouter M. Zweers

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

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:YAG laser source, measures the intensity of the weld-pool radiation through the optical fibre. 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 modelled 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 speed changes. This opens the possibility to optimise the welding speed without risking lack of penetration.

Original language	English
Title of host publication	ICALEO 2001
Subtitle of host publication	Congress proceedings, Laser Materials Processing Conference, Laser Microfabrication Conference, Jacksonville, Florida, USA
Editors	Xiangli Chen
Place of Publication	Orlando, FL
Publisher	Laser Institute of America
Pages	1083-1092
Number of pages	10
ISBN (Print)	0-912035-73-0
DOIs	https://doi.org/10.2351/1.5059767
Publication status	Published - 15 Oct 2001
Event	20th International Congress on Applications of Lasers & Electro-Optics, ICALEO 2001 - Jacksonville, United States Duration: 15 Oct 2001 → 18 Oct 2001 Conference number: 20

Conference

Conference	20th International Congress on Applications of Lasers & Electro-Optics, ICALEO 2001
Abbreviated title	ICALEO
Country/Territory	United States
City	Jacksonville
Period	15/10/01 → 18/10/01

Access to Document

10.2351/1.5059767

1 Poster

Penetration Control in Laser Welding of Sheet Metal using Optical Sensors
Postma, S., Aarts, R. G. K. M., Meijer, J., Jonker, J. B. & Zweers, W. M., 18 Nov 2001. 1 p.
Research output: Contribution to conference › Poster › Other research output

Cite this

Postma, S., Aarts, R. G. K. M., Meijer, J., Jonker, B., & Zweers, W. M. (2001). Penetration control in laser welding of sheet metal using optical sensors. In X. Chen (Ed.), ICALEO 2001: Congress proceedings, Laser Materials Processing Conference, Laser Microfabrication Conference, Jacksonville, Florida, USA (pp. 1083-1092). Laser Institute of America. https://doi.org/10.2351/1.5059767

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title = "Penetration control in laser welding of sheet metal using optical sensors",

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:YAG laser source, measures the intensity of the weld-pool radiation through the optical fibre. 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 modelled 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 speed changes. This opens the possibility to optimise the welding speed without risking lack of penetration.",

author = "Sjoerd Postma and Aarts, {Ronald G.K.M.} and Johan Meijer and Ben Jonker and Zweers, {Wouter M.}",

year = "2001",

month = oct,

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pages = "1083--1092",

editor = "Xiangli Chen",

booktitle = "ICALEO 2001",

publisher = "Laser Institute of America",

address = "United States",

note = "20th International Congress on Applications of Lasers & Electro-Optics, ICALEO 2001, ICALEO ; Conference date: 15-10-2001 Through 18-10-2001",

}

Postma, S, Aarts, RGKM, Meijer, J, Jonker, B & Zweers, WM 2001, Penetration control in laser welding of sheet metal using optical sensors. in X Chen (ed.), ICALEO 2001: Congress proceedings, Laser Materials Processing Conference, Laser Microfabrication Conference, Jacksonville, Florida, USA. Laser Institute of America, Orlando, FL, pp. 1083-1092, 20th International Congress on Applications of Lasers & Electro-Optics, ICALEO 2001, Jacksonville, Florida, United States, 15/10/01. https://doi.org/10.2351/1.5059767

Penetration control in laser welding of sheet metal using optical sensors. / Postma, Sjoerd; Aarts, Ronald G.K.M.; Meijer, Johan et al.
ICALEO 2001: Congress proceedings, Laser Materials Processing Conference, Laser Microfabrication Conference, Jacksonville, Florida, USA. ed. / Xiangli Chen. Orlando, FL: Laser Institute of America, 2001. p. 1083-1092.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

TY - GEN

T1 - Penetration control in laser welding of sheet metal using optical sensors

AU - Postma, Sjoerd

AU - Aarts, Ronald G.K.M.

AU - Meijer, Johan

AU - Jonker, Ben

AU - Zweers, Wouter M.

N1 - Conference code: 20

PY - 2001/10/15

Y1 - 2001/10/15

N2 - 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:YAG laser source, measures the intensity of the weld-pool radiation through the optical fibre. 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 modelled 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 speed changes. This opens the possibility to optimise the welding speed without risking lack of penetration.

AB - 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:YAG laser source, measures the intensity of the weld-pool radiation through the optical fibre. 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 modelled 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 speed changes. This opens the possibility to optimise the welding speed without risking lack of penetration.

U2 - 10.2351/1.5059767

DO - 10.2351/1.5059767

M3 - Conference contribution

SN - 0-912035-73-0

SP - 1083

EP - 1092

BT - ICALEO 2001

A2 - Chen, Xiangli

PB - Laser Institute of America

CY - Orlando, FL

T2 - 20th International Congress on Applications of Lasers & Electro-Optics, ICALEO 2001

Y2 - 15 October 2001 through 18 October 2001

ER -

Penetration control in laser welding of sheet metal using optical sensors

Abstract

Conference

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Research output

Penetration Control in Laser Welding of Sheet Metal using Optical Sensors

Cite this