Suche nach „[S.] [Steger]“ hat 7 Publikationen gefunden

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Beitrag (Sammelband oder Tagungsband)

Anton Schmailzl, D. Armbruster, M. Dostalek, S. Steger, S. Hierl

Strahlführungs- und -formungskonzept zur koaxialen Temperaturmessung beim scanner-basierten Laser-Durchstrahlschweißen

Tagungsband zur 2. OTH-Clusterkonferenz 2017, Regensburg

2017

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Beitrag (Sammelband oder Tagungsband)

Anton Schmailzl, S. Steger, S. Hierl

Herausforderungen bei der Integration einer pyrometrischen Temperaturmesstechnik in 3D-Laserscansysteme

Kalibrierung des 2D- und 3D- Arbeitsfeldes von Laser-Scan-Systemen

2017

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Beitrag (Sammelband oder Tagungsband)

Anton Schmailzl, S. Steger, M. Dostalek, S. Hierl

Online process monitoring at quasi-simultaneous laser transmission welding using a 3D-scanner with integrated pyrometer

Proceedings of SPIE 9736: SPIE LASE (13-18 February 2016; San Francisco, CA, USA)

2016

DOI: 10.1117/12.2211705

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Quasi-simultaneous laser transmission welding is a well-known joining technique for thermoplastics and mainly used in the automotive as well as in the medical industry. For process control usually the so called set-path monitoring is used, where the weld is specified as "good" if the irradiation time is inside a defined confidence interval. However, the detection of small-sized gaps or thermal damaged zones is not possible with this technique. The analyzation of the weld seam temperature during welding offers the possibility to overcome this problem. In this approach a 3D-scanner is used instead of a scanner with flat-field optic. By using a pyrometer in combination with a 3D-scanner no color-corrected optic is needed in order to provide that laser- and detection-spot are concentric. Experimental studies on polyethylene T-joints have shown that the quality of the signal is adequate, despite the use of an optical setup with a long working distance and a small optical aperture. The effects on temperature are studied for defects like a gap in the joining zone. Therefore a notch was milled into the absorbent polymer. In case of producing housings for electronic parts the effect of an electrical wire between the joining partners is also investigated. Both defects can be identified by a local temperature deviation even at a feed rate of four meters per second. Furthermore a strategy for signal-processing is demonstrated. By this, remaining defects can be identified. Consequently an online detection of local defects is possible, which makes a dynamic process control feasible.

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Beitrag (Sammelband oder Tagungsband)

S. Steger, Anton Schmailzl, M. Dostalek, D. Armbruster, S. Hierl

Entwicklung einer Systemtechnik für das quasisimultane Laser-Durchstrahlschweißen von 3D-Kunststoffbauteilen mit Temperaturmessung und Spanndruckregelung

Forschungsbericht 2016, Kiel

2016

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Zeitschriftenartikel

M. Dostalek, S. Steger, Anton Schmailzl, S. Hierl

Detecting Defects Reliably. Pyrometer-Based Temperature Measurement during Quasi-Simultaneous Laser Transmission Welding.

Kunststoffe International, vol. 105, no. 12, pp. 37-40

2015

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The integration of a broadband pyrometer in a 3-D scanner enables a continuous and local temperature measurement during the quasi-simultaneous laser transmission welding process. Welding tests on polyethylene samples show that defects can be clearly identified based on the temperature signal, despite a high scanning velocity.

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Zeitschriftenartikel

Anton Schmailzl, S. Steger, S. Hierl

Process Monitoring at Laser Welding of Thermoplastics. 3D‐scanner with integrated pyrometer enables online temperature monitoring at quasi‐simultaneous laser transmission welding

Laser Technik Journal, vol. 12, no. 4, pp. 34-37

2015

DOI: 10.1002/latj.201500029

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A pyrometer, integrated into a 3D‐scanner, offers the possibility to measure the weld seam temperature at quasi‐simultaneous laser transmission welding. Experimental studies have shown that gaps located in the joining zone can be identified by a temperature rise even at a high scanning velocity. This enables the implementation of algorithms for observation and control strategies.

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Zeitschriftenartikel

S. Steger, M. Dostalek, Anton Schmailzl, S. Hierl

Fehlstellen sicher erkennen. Pyrometerbasierte Temperaturmessung beim quasi-simultanen Laser-Durchstrahlschweißen.

Kunststoffe, vol. 105, no. 12, pp. 55-58

2015