Laser transmission welding with part adapted temperature fields

Devrient M, Wippo V, Jaeschke P, Stute U, Frick T, Haferkamp H, Schmidt M (2012)

Publication Type: Conference contribution

Publication year: 2012

Publisher: Laser Institute of America

Pages Range: 826-834

Conference Proceedings Title: ICALEO 2012 - 31st International Congress on Applications of Lasers and Electro-Optics

Event location: USA

DOI: 10.2351/1.5062547

Abstract

Thermoplastics are present in a wide variety of industrial applications. Different welding techniques like vibration, resistance and laser welding are used to join these materials. Laser transmission welding is known for high flexibility and extraordinary possibilities of process automation. Today, there is rising interest in joining large thermoplastic parts with three-dimensional formed weld seams. To successfully obtain these seams, the parts have to be clamped in such a way that is nearly gap-free. Gaps could result in processing issues such as welding failures, poor achievable process speed and low weld seam strengths. To overcome these problems, a new laser transmission welding technique was developed to achieve part adapted temperature fields based on a combination of contour and quasi-simultaneous welding. In addition, the authors are investigating the effectiveness of this strategy with a thermal finite element model. This model focuses on the heat affected zone geometries, temperature gradients and simulated melt pool geometries depending on the parameters creating part adapted temperature fields dynamically. The results from the model were verified by experiments with a diode laser. Furthermore, process control strategies were developed, which can later be used to ensure a constant weld seam quality. The process control is carried out by an on-axis pyrometer, which allows online temperature detection within the weld seam.

Authors with CRIS profile

Michael Schmidt Lehrstuhl für Photonische Technologien (LPT)

Additional Organisation(s)

Lehrstuhl für Photonische Technologien (LPT)

Involved external institutions

Bayerisches Laserzentrum gemeinnützige Forschungsgesellschaft mbH (BLZ) DE Germany (DE) Laser Zentrum Hannover e.V. (LZH) DE Germany (DE)

How to cite

APA:

Devrient, M., Wippo, V., Jaeschke, P., Stute, U., Frick, T., Haferkamp, H., & Schmidt, M. (2012). Laser transmission welding with part adapted temperature fields. In ICALEO 2012 - 31st International Congress on Applications of Lasers and Electro-Optics (pp. 826-834). USA: Laser Institute of America.

MLA:

Devrient, Martin, et al. "Laser transmission welding with part adapted temperature fields." Proceedings of the 31st International Congress on Applications of Lasers and Electro-Optics, ICALEO 2012, USA Laser Institute of America, 2012. 826-834.

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