Revisiting transport phenomena and their role in intermixing during dissimilar laser beam welding

Dahmen, Martin; Deniz, Berkan; Petring, Dirk

doi:10.1016/j.procir.2020.09.132

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2024

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“…The post-process methods of monitoring the welding process focuses on visual inspections and metallographic evaluation of the weld geometry. In this way, the potential weak points of the produced welds can be identified and their weak points can be addressed to meet the needed quality requirements [6].…”

Section: Introductionmentioning

confidence: 99%

Controlling the weld penetration depth of laser beam micro welding by using an iterative learning approach

Spurk,

Hollatz,

Lipnicki

et al. 2024

Materialwissenschaft Werkst

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In order to meet the increasing demand for high‐speed joining processes, laser beam micro welding is used to reproducibly weld metallic joining partners such as steel. Long weld seams or high cycle speeds, however, remain a challenge to achieve a constant welding depth throughout the entire welding process without major fluctuations. This paper shows the development and evaluation of a weld penetration depth control system based on interferometric measurement of the depth of the vapor capillary. High path speeds and small weld depths are challenging for real‐time depth control. Therefore, the offline data of the interferometric measurements are used to implement an iterative learning control of the weld penetration depth. The quality of the control is verified by welding with and without spatial power modulation on 1.4301 steel while following a linear and sinusoidal trajectory.

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Section: Introductionmentioning

confidence: 99%