Phenomenological study of chip flow/formation and unified cutting force modelling during Ti6Al4V alloy turning operations
TypeArticles dans des revues avec comité de lecture
Mechanistic approach for prediction of cutting forces are showing limits when it comes to enhance the cutting force modelling for specific applications of high-value added and thin parts, which are made of difficult-to-cut materials such as titanium alloys. This is the reason why precise cutting force modelling is needed in order to avoid deflection during machining. Therefore, this contribution aims to improve the description of the chip formation in cutting force modelling thanks to an original experimental set-up built up to observe in-situ the chip flow and measure the cutting forces during Ti6Al4V turning. This study highlights the fact that the chip flow direction has a significant effect on cutting forces and can be influenced by several parameters. In view of the results obtained, a generalised chip flow direction model is suggested. Chips morphology observation is also conducted with the purpose of providing experimental observations physical meaning. Afterwards, a cutting force model is proposed which takes into account the chip flow direction influence.
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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 ...
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Generalised cutting force model including contact radius effect for turning operations on Ti6Al4V titanium alloy DORLIN, Théo; FROMENTIN, Guillaume; COSTES, Jean-Philippe (Springer, 2016)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 ...
Phenomenological study of multivariable effects on exit burr criteria during orthogonal cutting of AlSi alloys using principal components analysis RÉGNIER, Tristan; FROMENTIN, Guillaume; D'ACUNTO, Alain; OUTEIRO, José; MARCON, Bertrand; CROLET, Arnaud (ASME American Society of Mechanical Engineers, 2018)During machining, burrs are produced along a part’s edges, which can affect a final product lifetime or its efficiency. Moreover, time-consuming and expensive techniques are needed to be applied to remove such burrs. ...