Experimental and Analytical Balance Sheet in Turning Applications

Cahuc, Olivier; Darnis, Philippe; Gérard, Alain; Battaglia, Jean-Luc

doi:10.1007/s001700170025

Cited by 31 publications

(31 citation statements)

References 16 publications

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“…Ainsi, il est nécessaire de développer des modèles permettant d'étudier les phénomènes vibratoires rencontrés au cours de l'usinage et de prévoir les conditions de stabilité des processus de coupe. Le modèle dynamique 3D réalisé est basé sur un modèle semi-analytique tridimensionnel de la coupe développé par deux laboratoires bordelais [2].…”

Section: Introductionunclassified

Nouvelle analyse des phénomènes vibratoires en tournage

Bisu

Darnis²,

K'Nevez

et al. 2007

Mécanique & Industries

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Tél : 05 40 00 62 23 Résumé Dans le processus de fabrication par enlèvement de matière sur machinesoutils, l'apparition des vibrations est inévitable. Dans les situations où l'amplitude dépasse les limites de la précision dimensionnelle, le phénomène vibratoire est préjudiciable. L'étude expérimentale présentée ici permet d'identifier les principaux paramètres relatifs au comportement dynamique du système usinant. La localisation des déplacements de la pointe de l'outil dans un plan est démontrée grâce aux résultats expérimentaux. L'existence de ce plan et les corrélations avec les caractéristiques élastiques du système usinant permettent de simplifier le modèle dynamique 3D. Avec l'approche expérimentale réalisée, un modèle dynamique est proposé en concordance avec les résultats expérimentaux. Mots clés : vibrations / modèle expérimental / plan des déplacements / vibrations auto-entretenues AbstractIn the cutting process, machine-tools vibrations are generally a real problem when the amplitude crosses the limits of dimensional or surface quality workpiece precision required. It is necessary to develop models taking into account the threedimensional vibratory approach to control the vibrations phenomena. An experimental study has been realized to understand the behavior of the cutting system and to identify its vibrations properties. The displacement's localization of the tool in a spatial plan, showed by the experimental results, allows us to simplify the threedimensional dynamical model. In this study, the experimental approach is completely presented and the first points of the three dimensional vibratory model are proposed according to the experimental results. Keywords: vibrations / experimental model / displacement plan / auto-excited vibrations.

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Section: Introductionunclassified

Nouvelle analyse des phénomènes vibratoires en tournage

Bisu

Darnis²,

K'Nevez

et al. 2007

Mécanique & Industries

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“…The slope increases significantly when the rake angle becomes large. The model of Cahuc et al (2001) has the exact opposite behaviour.…”

Section: Methodsmentioning

confidence: 99%

“…Recently, some authors have considered the stresses on the clearance face to be continuous with the stresses on the rake face. Cahuc et al (2001) considered an elastic contact. The stresses at point S are given by equations (64) …”

Section: Ploughingmentioning

confidence: 99%

From large-scale to micromachining: A review of force prediction models

Germain

Fromentin

Poulachon

et al. 2013

Journal of Manufacturing Processes

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. AbstractIn this paper, a review of work performed in the area of force modelling in metal cutting processes is presented. Past and present trends are described and criticised to compare their relevance with current requirements. Several approaches are reviewed, such as empirical, mechanistic and analytical models. The models' ability to predict forces, from rough machining to finish machining, is analysed.

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“…Many studies in the past 15 years have tried to show the importance of the other quantities found in the complete action tensor in the representation of the machining process. Toulouse and Cahuc in [3] and [1] have demonstrated the existence of a vector moment directly applied at the tool tip. It is important to note that this moment is not the sole result of a lever arm.…”

Section: Moments In Machiningmentioning

confidence: 99%

“…The understanding of the phenomenon in play and the modeling of the machining process can be challenging as many aspects are still not well mastered. Cahuc in [1] showed that complex phenomena appear while the chip is formed. Those phenomena are the result of the plastic dissipated energy and the friction from the tool/workpiece interface.…”

Section: Introductionmentioning

confidence: 99%

Strain Gradient Plasticity Applied to Material Cutting

Royer

Cahuc

Gérard

2011

AMR

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Abstract. To better understand the complex phenomena involved in the cutting process is to better qualify the behaviour law used in the simulatiotrn of machining processes (analytical and finite element modeling). The aim of this paper is to present the choices made regarding the behaviour law in this context, indeed, commonly used behaviour laws such as Jonhson-Cook can bring unsatisfactory results especially for high strain and large deformation processes. This study develops a large deformation strain-gradient theoretical framework with hypothesis linked with to metal cutting processes. The emphasis of the theory is placed on the existence of high shear phenomena creating a texture in the primary shear band. To account for the texture, the plastic spin is supposed to be relevant in this theory. It is shown that the theory as the capability of interpreting the complex phenomena found in machining and more particularly in high speed machining.

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Experimental and Analytical Balance Sheet in Turning Applications

Cited by 31 publications

References 16 publications

Nouvelle analyse des phénomènes vibratoires en tournage

Nouvelle analyse des phénomènes vibratoires en tournage

From large-scale to micromachining: A review of force prediction models

Strain Gradient Plasticity Applied to Material Cutting

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