On geometry and kinematics of abrasive processes: The theory of aggressiveness

date: 22.06.2020

category: Sporočila za javnost

 

Two members of the Laboratory for Machining (LABOD), in cooperation with experts from European and American institutions, have published an article entitled On geometry and kinematics of abrasive processes: The theory of aggressiveness in the International Journal of Machine Tools and Manufacture (IF 6.039).


Due to the stochastic nature of the abrasive-tool topography, abrasive processes are difficult to model and quantify. In contrast, their macro geometry and kinematics are usually well defined and straightforwardly controlled on machine tools. To reconcile this seeming contradiction, a novel unifying modelling framework is defined through the theory of aggressiveness. It encompasses the arbitrary geometry and kinematics of a workpiece moving relative to an abrasive surface. The key parameter is the point-aggressiveness, which is a dimensionless scalar quantity based on the vector field of relative velocity and the vector field of abrasive-surface normals. This fundamental process parameter relates directly to typical process outputs such as specific energy, abrasive-tool wear and surface roughness. The theory of aggressiveness is experimentally validated by its application to a diverse array of abrasive processes, including grinding, diamond truing and dressing, where the aggressiveness number is correlated with the aforementioned measured process outputs.

The resulting original scientific paper is freely available under this link.

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