A generalised geometrical model of turning operations for cutting force modelling using edge discretisation
TypeArticles dans des revues avec comité de lecture
The knowledge of cutting forces is of prime importance to ensure the success of cutting operations, the desired properties of the machined parts and therefore the functionality of the workpieces. Edge discretisation is one way to model cutting forces. Traditionally used in milling, this methodology enables local changes in uncut chip thickness or cutting geometry to be taken into account and then gives suitable results in the three directions. A key point of this method is the geometrical transformation that enables the description of various tool geometries. This study proposes a geometrical model based on homogeneous matrices, whose main interest is to decompose the transformations step-by-step. The method, generalisable to all machining operations, is detailed for turning operations. Inserted cutters are modelled considering both the positioning of the insert and the local geometry of the insert. The cutting geometry and the edge are described using the same model in the machine coordinates system, allowing forces and moments to be calculated easily.
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CAMPOCASSO, Sébastien; COSTES, Jean-Philippe; FROMENTIN, Guillaume; BISSEY BRETON, Stéphanie; POULACHON, Gérard (Elsevier, 2013)In order to predict the characteristics of the machined part, such as geometry, surface roughness and fatigue or corrosion resistance, the cutting forces values should be known as precisely as possible. The edge discretisation ...
Identification d'un modèle d'efforts de coupe mécanistique et application dans le cas d'un contournage de cuivre pur CAMPOCASSO, Sébastien; TRAPET, Florent; COSTES, Jean-Philippe; FROMENTIN, Guillaume; BISSEY BRETON, Stéphanie; POULACHON, Gérard (2012)L'obtention des caractéristiques des pièces usinées ainsi que la bonne maîtrise du procédé d'usinage sont liées aux efforts de coupe. De nombreux modèles d'efforts de coupe ont déjà été développés, mais ils sont souvent ...
CAMPOCASSO, Sébastien; POULACHON, Gérard; COSTES, Jean-Philippe; BISSEY BRETON, Stéphanie (Elsevier, 2014)The cutting forces are often modelled using edge discretisation methodology. In finish turning, due to the smaller corner radii, the use of a local cutting force model identified from orthogonal cutting tests poses a ...
CAMPOCASSO, Sébastien; POULACHON, Gérard; BISSEY BRETON, Stéphanie; COSTES, Jean-Philippe; OUTEIRO, José (ELSEVIER, 2017)Mechanistic cutting force modelling generally involves coefficients identification from machining tests. In order to develop multi-material cutting force models avoiding identification, several studies have tried to link ...
GERMAIN, Dimitri; FROMENTIN, Guillaume; POULACHON, Gérard; BISSEY BRETON, Stéphanie (ELSEVIER, 2013)In this paper, a reviewof 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. ...