Open AccessA Thermography-based Online Control Method for Press Hardening
Author(s) -
Eduard Garcia-Llamas,
Jaume Pujante,
Pol Torres,
Francesc Bonada
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1157/1/012010
Subject(s) - pyrometer , stamping , statistical process control , hardening (computing) , computer science , mechanical engineering , quality assurance , thermography , process control , production line , materials science , process (computing) , temperature measurement , engineering , composite material , optics , layer (electronics) , quantum mechanics , infrared , operating system , operations management , physics , external quality assessment
The aim of this work is to investigate a simple on-line control methodology applicable to press hardening. Short production runs were performed in a laboratory plant, using a pyrometer to measure sheet and die temperatures with varying processing conditions. Sheets thus treated were studied in terms of microstructure and mechanical properties. Different closing die time and refrigeration conditions were employed to force OK and Not OK conditions. The experimental data including the process variables as a well as the resultant temperatures have been analysed and modelled by means of statistical analysis and Machine Learning algorithms, to discover hidden correlations that can lead to actionable predicting models. The results show a direct link of the final temperature with the microstructure and its hardness. The outcome of this paper can be used for efficient process design and detection of anomalous temperature meanwhile an industrial hot stamping process take part. In addition, the analysis performed can help productivity and quality assurance while leading towards a smarter and more efficient manufacturing scenario.