Effect of Variable Power Control in Quasi-simultaneous Fiber Laser Welding of Polymers

Petri Laakso, Saara Ruotsalainen, Tuomas Purtonen, Mikko Rikkonen, Antti Salminen, Veli Kujanpää

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

1 Citation (Scopus)

Abstract

In transmission laser welding of polymers, the process nature is dependent on rapid melting of the absorbing part. This melting creates the heat transfer to the transmissive part which is then melted and after the cooling period, a weld is created. Typically in QSLW material heats up towards the end of the welding cycle. With this new variant, the idea is to heat the material as fast as possible to the molten state and then keep it there for the rest of the welding time. With variable power control during the welding, the power level can be adjusted to melt the material effectively, and keep it molten during the whole welding time without overheating the material. This way the weld is given a longer time at melt so that more material would be mixed. Optimal power curve can be extracted with a pyrometer and then used in production. This paper presents the basic design variable of the power control system and shows how the quality of the weld is affected with its utilization. Welding results are compared to traditional QSLW and also to samples which are welded with only three power steps during welding.
Original languageEnglish
Title of host publicationICALEO 2011 congress proceedings
Place of PublicationOrlando, FL, USA
Pages839-845
ISBN (Electronic)978-0-9120-3594-9
Publication statusPublished - 2011
MoE publication typeA4 Article in a conference publication
Event30th International Congress on Applications of Lasers and Electro-Optics, ICALEO 2011 - Orlando, FL, United States
Duration: 23 Oct 201127 Oct 2011

Conference

Conference30th International Congress on Applications of Lasers and Electro-Optics, ICALEO 2011
Abbreviated titleICALEO 2011
CountryUnited States
CityOrlando, FL
Period23/10/1127/10/11

Fingerprint

Laser beam welding
Fiber lasers
Power control
Welding
Polymers
Welds
Molten materials
Melting
Pyrometers
Heat transfer
Cooling
Control systems

Keywords

  • fiber laser
  • polymer
  • welding
  • quasi-simultaneous

Cite this

Laakso, P., Ruotsalainen, S., Purtonen, T., Rikkonen, M., Salminen, A., & Kujanpää, V. (2011). Effect of Variable Power Control in Quasi-simultaneous Fiber Laser Welding of Polymers. In ICALEO 2011 congress proceedings (pp. 839-845). Orlando, FL, USA.
Laakso, Petri ; Ruotsalainen, Saara ; Purtonen, Tuomas ; Rikkonen, Mikko ; Salminen, Antti ; Kujanpää, Veli. / Effect of Variable Power Control in Quasi-simultaneous Fiber Laser Welding of Polymers. ICALEO 2011 congress proceedings. Orlando, FL, USA, 2011. pp. 839-845
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abstract = "In transmission laser welding of polymers, the process nature is dependent on rapid melting of the absorbing part. This melting creates the heat transfer to the transmissive part which is then melted and after the cooling period, a weld is created. Typically in QSLW material heats up towards the end of the welding cycle. With this new variant, the idea is to heat the material as fast as possible to the molten state and then keep it there for the rest of the welding time. With variable power control during the welding, the power level can be adjusted to melt the material effectively, and keep it molten during the whole welding time without overheating the material. This way the weld is given a longer time at melt so that more material would be mixed. Optimal power curve can be extracted with a pyrometer and then used in production. This paper presents the basic design variable of the power control system and shows how the quality of the weld is affected with its utilization. Welding results are compared to traditional QSLW and also to samples which are welded with only three power steps during welding.",
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Laakso, P, Ruotsalainen, S, Purtonen, T, Rikkonen, M, Salminen, A & Kujanpää, V 2011, Effect of Variable Power Control in Quasi-simultaneous Fiber Laser Welding of Polymers. in ICALEO 2011 congress proceedings. Orlando, FL, USA, pp. 839-845, 30th International Congress on Applications of Lasers and Electro-Optics, ICALEO 2011, Orlando, FL, United States, 23/10/11.

Effect of Variable Power Control in Quasi-simultaneous Fiber Laser Welding of Polymers. / Laakso, Petri; Ruotsalainen, Saara; Purtonen, Tuomas; Rikkonen, Mikko; Salminen, Antti; Kujanpää, Veli.

ICALEO 2011 congress proceedings. Orlando, FL, USA, 2011. p. 839-845.

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

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T1 - Effect of Variable Power Control in Quasi-simultaneous Fiber Laser Welding of Polymers

AU - Laakso, Petri

AU - Ruotsalainen, Saara

AU - Purtonen, Tuomas

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AU - Salminen, Antti

AU - Kujanpää, Veli

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N2 - In transmission laser welding of polymers, the process nature is dependent on rapid melting of the absorbing part. This melting creates the heat transfer to the transmissive part which is then melted and after the cooling period, a weld is created. Typically in QSLW material heats up towards the end of the welding cycle. With this new variant, the idea is to heat the material as fast as possible to the molten state and then keep it there for the rest of the welding time. With variable power control during the welding, the power level can be adjusted to melt the material effectively, and keep it molten during the whole welding time without overheating the material. This way the weld is given a longer time at melt so that more material would be mixed. Optimal power curve can be extracted with a pyrometer and then used in production. This paper presents the basic design variable of the power control system and shows how the quality of the weld is affected with its utilization. Welding results are compared to traditional QSLW and also to samples which are welded with only three power steps during welding.

AB - In transmission laser welding of polymers, the process nature is dependent on rapid melting of the absorbing part. This melting creates the heat transfer to the transmissive part which is then melted and after the cooling period, a weld is created. Typically in QSLW material heats up towards the end of the welding cycle. With this new variant, the idea is to heat the material as fast as possible to the molten state and then keep it there for the rest of the welding time. With variable power control during the welding, the power level can be adjusted to melt the material effectively, and keep it molten during the whole welding time without overheating the material. This way the weld is given a longer time at melt so that more material would be mixed. Optimal power curve can be extracted with a pyrometer and then used in production. This paper presents the basic design variable of the power control system and shows how the quality of the weld is affected with its utilization. Welding results are compared to traditional QSLW and also to samples which are welded with only three power steps during welding.

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Laakso P, Ruotsalainen S, Purtonen T, Rikkonen M, Salminen A, Kujanpää V. Effect of Variable Power Control in Quasi-simultaneous Fiber Laser Welding of Polymers. In ICALEO 2011 congress proceedings. Orlando, FL, USA. 2011. p. 839-845