A new strategy of tool path planning based on hydrodynamic data to machine marine propeller

• Autorzy: Breteau T. , Damay T. , Duc E. , Hascoët J.-Y.
• Języki publikacji: EN

Abstrakty

EN

Marine propellers are complex surfaces that are usually machined with a perfect roughness in order not to disturb the theoretical flow. Because this requirement is penalizing from a manufacturing point of view, the global objective of the study is to propose an approach in which the machining parameters are linked to functional properties of the blade in order to remove the polishing phase. To reach this objective, hydrodynamic data are used: streak lines, that are computed during the propeller design phase, characterize the fluid behavior at the close vicinity of the blade. Those lines, which are theoretically continuous at the leading edge, turn out to be discontinuous, due to the computing method. To be consistent with the fluid behavior as much as possible, the idea presented in the paper is to compose a continuous trajectory, especially at the leading edge, to mill the surface. Thus, an algorithm is developed to plan tool paths which are smoothed at leading edge using Bezier curves. Moreover, this algorithm allows to quantify the cusp height at the leading edge to avoid a drop in performance using criteria linked to the dynamical behavior of a five axis machine tool. In this work, a strategy is developed and enables multiaxial milling of a blade surface by using geometric and hydrodynamic data and by respecting the associated constraints.

Słowa kluczowe

EN

propeller; tool path planning; machining methodology

• Wydawca: Wydawnictwo Wrocławskiej Rady FSNT NOT
• Czasopismo: Journal of Machine Engineering
• Rocznik: 2009
• Tom: Vol. 9, No. 1
• Strony: 29--40
• Opis fizyczny: Bibliogr. 8 poz., rys.

Twórcy

autor

Breteau T.

• IREnav, Ecole Navale 29 240 Brest Armées (France)

autor

Damay T.

• IREnav, Ecole Navale 29 240 Brest Armées (France)

autor

Duc E.

• LaMI, Campus de Clermont-ferrand, Les Cézeaux BP 265, 63 275 Aubiere Cedex

autor

Hascoët J.-Y.

• IRCCyN, 1 rue de la Noë BP 92101, 44 321 Nantes Cedex 3 (France)

Bibliografia

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• 2. BRIENT A., HASCOET J.Y., MARTINEAU J.P., Influence of Machining Phaths on Hydro Propeller Performance., International Journal of Engineering Manufacture, Vol. 217, Number 12, 2003, 1757-1762.
• 3. CARLTON J. S., Butterworth Heinemann Ltd, 1994, 432 pp., ISBN 075061143X.
• 4. DAMAY T., JAOUEN R., HASCOET J.Y., MARTINEAU J.P., BRIENT A., ASTOLFI J.A., HAUVILLE F., Design for Manufacturing applied to Hydrofoils dedicated to Marine Propellers, Proceedings of sixth International Conference (2007) on High Speed Machining, San Sebastian, Espagne, 21-22 Mars, 2007,432-437.
• 5. HOLL J.W., BILLET M.L., TADA M., STINEBRING D.R., The Influence of Pressure Gradient on Desinent Cavitation from Isolated Surface Protusions -.,Transactions of the ASME, 1986, Vol. 108, 254-260.
• 6. NITTEL M.F., Numerically controlled machining of propeller blades. Marine Technology, 1989, Vol. 26, 202- 209.
• 7. SVENSEN E., MEDHURST J.S., Asimplified Method for the Assessment of Propeller Roughness Penalties., Marine Technology, 1984, Vol. 21, Number I, 41-48.
• 8. TOURNIER C., Contribution to the complex surfaces design: The machining surface in iso-scallop5 axis milling., PhD Thesis: Ecole Normale Supérieur de Cachan, 2001.