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Прогнозирование размера площадки затупления абразивного зерна…
5
Predicting the size of the area of abrasive grain bluntness
for the various technological conditions
© D.V. Ardashev
South Ural State University (National Research University), Chelyabinsk, 454080, Russia
The main indicators that determine the performance of abrasive tools are the intensity
and the degree of its bluntness. When considering the discrete contact of the grinding
wheel with the workpiece one can use the size of the area of bluntness as such parameter.
The suggested mathematical model of the area of abrasive grain bluntness
for the first
time takes into account the basic mechanisms of wear and tear — mechanical and physi-
co-chemical
.
Mechanical wear is analyzed from the standpoint of the kinetic theory of
strength of a solid body
, and physico-chemical wear — from the standpoint of the theory
of mass transfer. Since the analyzed wear of abrasive grains depends on the initial area
of bluntness, this model for the first time takes into account nonlinear feedback on the
size of the area of bluntness. Thus, the mathematical model is multifactorial and predicts
the amount of wear of the abrasive tool in various process conditions.
Keywords:
area of bluntness, wear of abrasive grains, kinetic theory of strength, physico-
chemical wear.
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