Experimental and numerical approaches of Laser assisted turning
TypeArticles dans des revues avec comité de lecture
This study shows experimental and numerical preliminary approaches of laser assisted machining. The laboratory has an industrial lathe equipped with a laser source with 2.5 kW to carry out experiments on various materials. This machine is instrumented for the measurement of cutting forces and thermal fields (infra-red camera). Our aim is to show the viability of the process in industry. After a presentation of laser assisted machining, we will detail the laser heating modelling, and the first steps of a cutting modelling with laser assistance, for the comprehension of thermomechanical phenomena. Then we will present the effect of the laser assistance, on the cutting force and the surface quality when machining a traditional steel, and on the field of the residual stresses after machining of a hardened bearing (55 HRc).
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ACHOURI, Mohamed; GERMAIN, Guénaël; DAL SANTO, Philippe; LEBRUN, Jean-Lou; SAIDANE, Delphine (Scientific.Net, 2011)This work deals a contribution to ductile damage of High-Strength Low-Alloy (HSLA) steel steels under low stress triaxiality. This work is based on micrographics observations and in situ shear tests to examine the evolution ...
GERMAIN, Guénaël; DAL SANTO, Philippe; LEBRUN, Jean-Lou (ELSEVIER, 2011)Laser Assisted Machining (LAM) improves the machinability of materials by locally heating the workpiece just prior to cutting. Experimental investigations have confirmed that the cutting force can be decreased, by as much ...
BRAHAM-BOUCHNAK, Tarek; GERMAIN, Guénaël; ROBERT, Patrick; LEBRUN, Jean-Lou; AUGER, Stéphane (Springer, 2010)High pressure water jet assisted turning (HPWJAT) consists of projecting a high pressure water jet, up to several hundred bar, into the tool-workpiece interface. The water jet is directed between the chip and the tool ...
GERMAIN, Guénaël; LEBRUN, Jean-Lou; BRAHAM-BOUCHNAK, Tarek; BELLETT, Daniel; AUGER, Stéphane (SpringerLink, 2008)Laser assisted machining (LAM) can improve the machinability of materials by locally heating the material prior to its removal. The work presented here is a study of the laser assisted machining of Inconel 718 (NiCr19FeNb ...
An experimental investigation of the behaviour of steels over large temperature and strain rate ranges HOR, Anis; MOREL, Franck; LEBRUN, Jean-Lou; GERMAIN, Guénaël (ELSEVIER, 2013)During forging and machining manufacturing processes, the material is subject to large strains at high strain rates which provoke local heating and microstructural changes. Modelling of these phenomena requires precise ...