Generalised cutting force model including contact radius effect for turning operations on Ti6Al4V titanium alloy
TypeArticles dans des revues avec comité de lecture
Current constraints on aeronautical parts have led to the introduction of materials like titanium alloys as well as new part geometries featuring large dimensions and reduced thickness. Inappropriate cutting forces during turning operations could lead to high deflections and damage to the machine. In order to ensure the respect of final part geometry and the optimal use of resources, cutting forces have to be known, to anticipate the deformed shape during and after machining operations on thin parts. Current models are offering a solution which can be optimised by the modelling influence of the ploughing effect on cutting forces. Therefore, a mechanistic model is developed in order to improve the prediction of cutting forces during turning operations on titanium alloy Ti6Al4V: this model includes the effect of the clearance face contact radius and comprises two main steps. First, the effect of the clearance contact radius and the effect of the cutting edge lead angle are determined independently, via a direct identification method based on elementary cutting tests. Secondly, this analysis is extended to cutting trials in boring, cylindrical turning and face turning. Then, based on a mechanistic approach, a model is defined according to the previous results and the coefficients are identified thanks to cutting trials in real conditions. The results of the proposed model are then compared to a commonly used model which takes into account mostly the uncut chip thickness effect. It is demonstrated that the proposed cutting force model provides a more accurate prediction of cutting forces.
Showing items related by title, author, creator and subject.
Analysis and Modelling of the Contact Radius Effect on the Cutting Forces in Cylindrical and Face Turning of Ti6Al4V Titanium Alloy DORLIN, Théo; FROMENTIN, Guillaume; COSTES, Jean-Philippe (CIRP, 2015)Cutting forces are representative data to characterize machining operations.They have to be known to perform the part manufacturing. Therefore, cutting forces predictive models are useful and it is possible to optimize ...
Investigations on the flank wear and modelling of the contact radius effect in turning of Ti6Al4V titanium alloy BONO, Aurélie; DORLIN, Théo; COSTES, Jean-Philippe; FROMENTIN, Guillaume; KARAOUNI, Habib (Elsevier, 2016)Machining of difficult-to-cut materials like Ti6Al4V titanium alloy leads to significant flank wear on the cutting tool. In order to ensure the respect of final part specifications, flank wear has to be controlled. In ...
Mechanistic cutting force model including the stress state induced by the chip flow contribution for cylindrical turning on Ti6Al4V alloy with two different nose radii DORLIN, Théo; FROMENTIN, Guillaume; COSTES, Jean-Philippe; KARAOUNI, Habib (2016)Force modelling is a major research topic in machining. Several approaches are used to face with the different needs. Mechanistic models appear to be an easier and rapid way for computing cutting forces; nevertheless they ...
A generalised geometrical model of turning operations for cutting force modelling using edge discretisation CAMPOCASSO, Sébastien; COSTES, Jean-Philippe; FROMENTIN, Guillaume; BISSEY BRETON, Stéphanie; POULACHON, Gérard (Elsevier, 2015)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 ...
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 ...