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Discrete-element modelling of the grinding contact length combining the wheel-body structure and the surface-topography models

Article dans une revue avec comité de lecture
Author
OSA, Jean-Louis
SANCHEZ, José Antonio
239392 Universidad Miguel Hernández [Elche] [UMH]
ORTEGA, Naiara
CHARLES, Jean-Luc
ccIORDANOFF, Ivan

URI
http://hdl.handle.net/10985/17175
DOI
10.1016/j.ijmachtools.2016.07.004
Date
2016
Journal
International Journal of Machine Tools and Manufacture

Abstract

Phenomena governing the grinding process are largely related to the nature and evolution of contact between grinding wheel and ground component. The definition of the contact area plays an essential role in the simulation of grinding temperatures, forces or wear. This paper presents a numerical model that simulates the contact between grinding wheel and workpiece in surface grinding. The model reproduces the granular structure of the grinding wheel by means of the discrete element method. The surface topography is applied on the model surface taking into account the dressing mechanisms and movements of a single-point dresser. The individual contacts between abrasive grits and workpiece are studied regarding the uncut chip thickness, assuming viscoplastic material behaviour. Simulation results are evaluated with experimental measurements of the contact length. The results remark the importance of surface topography and dressing conditions on the contact area, as well as wheel deflection.

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