Investigations on the formation of pores during laser beam welding of hairpin windings using a high-speed x-ray imaging system

M Omlor, EN Reinheimer, T Butzmann… - Journal of Laser …, 2023 - pubs.aip.org
Electric drives continue to grow in importance for future mobility. In recent years, hairpin
winding has become established for stator production. For connecting rectangular hairpin …

Inline weld depth evaluation and control based on OCT keyhole depth measurement and fuzzy control

M Schmoeller, T Weiss, K Goetz, C Stadter, C Bernauer… - Processes, 2022 - mdpi.com
In an industrial joining process, exemplified by deep penetration laser beam welding,
ensuring a high quality of welds requires a great effort. The quality cannot be fully …

[HTML][HTML] Geometry and absorptance of the cutting fronts during laser beam cutting

J Lind, F Fetzer, D Blazquez-Sanchez… - Journal of Laser …, 2020 - pubs.aip.org
The geometry of the cutting front and the cutting kerf was measured with an online high-
speed x-ray diagnostic system. X-ray videos from fusion cutting of 10 mm thick stainless …

[HTML][HTML] Transition from stable laser fusion cutting conditions to incomplete cutting analysed with high-speed X-ray imaging

J Lind, F Fetzer, C Hagenlocher… - Journal of Manufacturing …, 2020 - Elsevier
The transition from stable laser cutting conditions to an incomplete cut, which is generally
referred to as loss of cut, limits the maximum feed rate of laser beam cutting. In order to …

Beam offset detection in laser stake welding of Tee Joints using machine learning and spectrometer measurements

A Jadidi, Y Mi, F Sikström, M Nilsen, A Ancona - Sensors, 2022 - mdpi.com
Laser beam welding offers high productivity and relatively low heat input and is one key
enabler for efficient manufacturing of sandwich constructions. However, the process is …

Combined Use of Acoustic Measurement Techniques with X-ray Imaging for Real-Time Observation of Laser-Based Manufacturing

M Samimi, M Saadabadi, H Hosseinlaghab - Metrology, 2024 - mdpi.com
Ensuring high-quality control in laser additive manufacturing and laser welding relies on the
implementation of reliable and cost-effective real-time observation techniques. Real-time …

Laser material processing optimization using bayesian optimization: a generic tool

T Menold, V Onuseit, M Buser, M Haas, N Bär… - Light: Advanced …, 2024 - light-am.com
Optimizing laser processes is historically challenging, requiring extensive and costly
experimentation. To solve this issue, we apply Bayesian optimization for process parameter …

High-speed x-ray investigation of pore formation during full penetration laser beam welding of AA6016 aluminum sheets contaminated with lubricants

C Hagenlocher, J Lind, R Weber, T Graf - Applied Sciences, 2020 - mdpi.com
Featured Application Authors are encouraged to provide a concise description of the specific
application or a potential application of the work. This section is not mandatory. Abstract The …

Supercritical melt flow in high-speed laser welding and its interdependence with the geometry of the keyhole and the melt pool

EN Reinheimer, P Berger, C Hagenlocher… - … International Journal of …, 2024 - Springer
The advent of undercuts and humping limits the applicable speed of deep-penetration laser
welding. Recent findings additionally show that a significant change of the keyhole's shape …

[HTML][HTML] Analysis and optimization of the piercing process in laser beam cutting by means of high-speed X-ray imaging

J Lind, N Weckenmann, C Hagenlocher… - Journal of Manufacturing …, 2021 - Elsevier
An in-process analysis of the piercing process at the beginning of a laser cut using high-
speed X-ray imaging is presented for the first time. Sheets of stainless steel with thicknesses …