De l'optique dans les structures. Images rapides et mesures optiques à l'Institut Clément Ader

Abstract : The use of titanium alloys in the aeronautical and high technology domains is widespread. The high strength and the low mass are two outstanding characteristics of titanium alloys which permit to produce parts for these domains. As other hard materials, it is challenging to generate 3D surfaces (e.g. pockets) when using conventional cutting methods. The development of Abrasive Water Jet Machining (AWJM) technology shows the capability to cut any kind of materials and it seems to be a good solution for such titanium materials with low specific force, low deformation of parts and low thermal shocks. Applying this technology for generating 3D surfaces requires to adopt a modelling approach. However, a general methodology results in complex models due to a lot of parameters of the machining process and based on numerous experiments. This study introduces an extended geometry model of an elementary pass when changing the firing angle during machining Ti-6AL-4V titanium alloy with a given machine configuration. Several experiments are conducted to observe the influence of major kinematic operating parameters, i.e. jet inclination angle (α) (perpendicular to the feed direction) and traverse speed (Vf). The material exposure time and the erosion capability of abrasives particles are affected directly by a variation of the traverse speed (Vf) and firing angle (α). These variations lead to different erosion rates along the kerf profile characterized by the depth and width of cut. A comparison demonstrated an efficiency of the proposed model for depth and width of elementary passes. Based on knowledge of the influence of both firing angle and traverse speed on the elementary pass shape, the proposed model allows to develop the simulation of AWJM process and paves a way for milling flat bottom pockets and 3D complex shapes.
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https://hal-univ-tlse3.archives-ouvertes.fr/hal-02018751
Contributor : Pierre Naegelen <>
Submitted on : Thursday, February 14, 2019 - 10:27:25 AM
Last modification on : Tuesday, October 22, 2019 - 5:20:44 PM

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  • HAL Id : hal-02018751, version 1

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Yves Gourinat, Philippe Olivier, Guilhem Michon, Olivier Cherrier. De l'optique dans les structures. Images rapides et mesures optiques à l'Institut Clément Ader. Congrès de la Société Française d’Optique Toulouse 2018, Jul 2018, Toulouse, France. ⟨hal-02018751⟩

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