| DOI | Trouver le DOI : https://doi.org/10.1115/IMECE2012-89066 |
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| Auteur | Rechercher : Meshreki, M.1; Rechercher : Kövecses, J.; Rechercher : Attia, H.1 |
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| Affiliation | - Conseil national de recherches du Canada. Aérospatiale
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| Format | Texte, Article |
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| Conférence | ASME 2012 International Mechanical Engineering Congress and Exposition, IMECE 2012, 9 November 2012 through 15 November 2012, Houston, TX |
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| Sujet | Accurate measurement; Aerospace structural components; Design and optimization; Experimental validations; High speed machining; Holonomic constraints; Semi-analytical model; Thin walled components; Dynamic models; Fixtures (tooling); Forecasting; Integrated control; Thin walled structures; Machining |
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| Résumé | Accurate predictions of the workpiece vibrations during high speed machining of aerospace structural components is a critical issue since it affects the accuracy of the final part. For fixture design purposes, and for force predictions, the computational efficiency of the dynamic models predicting the workpiece vibrations is a crucial factor since it affects the cycle time for the design and optimization of the fixtures. Most of the available dynamic models are based on computationally prohibitive techniques, such as finite element analysis. In this work, an integrated approach, based on recently developed semi-analytical models, is presented for the analysis of the effect of the fixture layout on the dynamics of thin-walled structures while taking into account the continuous change of thickness of the workpiece, and the effect of rigid and deformable fixture supports. The developed approach is based on plate models with holonomic constraints and finite stiffness springs. This approach, together with all the developed models and formulations are validated numerically for different workpiece geometries and various types of loading. An experimental study has been performed to validate this approach through the machining of thin-walled components. It was found that this approach led to prediction errors within 10% and more than 20 times reduction in the computation time. The challenge of filtering the effect of the dynamics of the force measurement system from the measured signals was overcome by developing a new hybrid semi-analytical methodology for accurate measurement of the machining forces. Copyright © 2012 by ASME. |
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| Date de publication | 2012 |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Numéro NPARC | 21269242 |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | 3a8d8fb5-6c00-4276-9a81-f5ef210a803b |
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| Enregistrement créé | 2013-12-12 |
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| Enregistrement modifié | 2020-04-21 |
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