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research-article

Prediction of blunting area of abrasive grains on a grinding wheel

[+] Author and Article Information
Aleksandr A. Dyakonov

Vice-rector, professor, Department of Mechanical Engineering South Ural State University Lenin Prospect, 76 Chelyabinsk, 454080, Russia
diakonovaa@susu.ru

Dmitrii V. Ardashev

Associate professor, Department of Mechanical Engineering South Ural State University Lenin Prospect, 76 Chelyabinsk, 454080, Russia
ardashevdv@susu.ru

1Corresponding author.

ASME doi:10.1115/1.4038055 History: Received March 27, 2017; Revised September 26, 2017

Abstract

The article presents the results of calculating the blunting area of abrasive grains of grinding wheels, determined in accordance with the previously developed model. The mathematic model of the size of the blunting area of an abrasive grain consider the main mechanisms of its wear are – mechanical and physicochemical. These mechanisms are taken into account in the model. For the first time the kinetic theory of strength was used for determine the mechanical wear of abrasive grain. The mass-transfer theory was used to study the physicochemical wear: coefficients of chemical affinity with the abrasive material are experimentally defined for the assortment of workpiece materials. The developed mathematic model is a multiple-factor one and this will allow to predict the size of wear of the abrasive wheel for different technological conditions. Also the article presents the experimental method for determining the blunting area of abrasive grains of grinding wheels, which allows making a direct measurement of wear parameters of grinding wheels. The main parameter of grinding wheel wear is the length of the blunting area of the grain, was measured out in the direction of the cutting speed vector. The grinding wheels of different graininess were studied – F60 and F46. The grinding wheel working surface was studied by numerical photos and microscope. The results of these experiments have confirmed the adequacy of the design model. Keywords: grinding wheel, abrasive grain blunting area, wear

Copyright (c) 2017 by ASME
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