Abstract
This paper presents the calculating method predicting the cutting resistance values under ordinary cutting conditions. For this purpose, characteristics of three factors, that is, coefficients of friction at tool-chip interface, cutting forces, forces along the shear plane are used. From the consideration of the friction test results, coefficients of friction can be expressed by the product of the force normal to the rake face and the chip speed depending upon several rake angle values. By applying the proposal given by Tobias for the orthogonal cutting to the three-dimensional case, cutting forces and forces a-long the shear plane are assumed to be propor-tional to the shear plane area. The calculated values by this method fairly coincide with experimental values under various cutting conditions for the some carbon steel materials.
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