Browsing by Author "Cortadi, Alberto Jimenez"
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Item Instability detection on a radial turning process for superalloys(Springer Verlag, 2018) Cortadi, Alberto Jimenez; Boto, Fernando; Irigoien, Itziar; Sierra, Basilio; Suarez, Alfredo; Perez Garcia, Hilde; Alfonso-Cendon, Javier; Sanchez Gonzalez, Lidia; Corchado, Emilio; Quintian, Hector; Tecnalia Research & Innovation; FACTORY; FABRIC_INTELTwo different models for instability detection in a radial turning process are proposed in order to prevent fault appearance. This methods allows to detect instability on this machining process based on the forces. Median Absolute Deviation Normalized (MADN) and Principal Component Analysis (PCA) are the statistical methods used to classify those tests. The results have showed that the models are close to expert classification of the tests stability.Item Intelligent maintenance for industrial processes, a case study on cold stamping(Springer Verlag, 2018) Boto, Fernando; Lizuain, Zigor; Cortadi, Alberto Jimenez; Perez Garcia, Hilde; Alfonso-Cendon, Javier; Sanchez Gonzalez, Lidia; Corchado, Emilio; Quintian, Hector; Tecnalia Research & Innovation; FACTORYThe correct diagnosis of tool breakage is fundamental to improve productivity, minimizing the number of unproductive hours and avoiding expensive repairs. The use of Data Mining techniques provides a significant added value in terms of improvements in the robustness, reliability and flexibility of the monitored systems. In this work, a general view of a diagnosis and prognosis of tool breakage in Industrial Processes is proposed. The important issues identified will be analyzed: filtering, process characterization and data based modeling. A case study has been implemented to carry out the prognosis of tool breakage in the cold stamping process. The results provided are qualitative trends and hypothesis to perform the prognosis. Although a validation in real operation is needed, these results are promising and demonstrate the goodness of using these type of techniques in real processes.