Generalized cutting force model for grinding

Abstract

In CNC grinding operations different surfaces are processed with various types of grinding. Model of cutting force is necessarily used in cutting modes calculating. However, it's impossible to use partial empirical dependences of cutting force for automating of cutting modes calculation because they do not cover all normative space of grinding conditions and are not intended for use in the calculation of automatic CNC grinding cycles. Therefore analytical wide-range models of cutting forces for different types of grinding are needed, but these models should be designed on the basis of common idea of kinematics and physics of metal removal processes. The article proposes the method of obtaining cutting force models for different grinding types, obtained from a generalized analytical wide-range cutting force model, as particular cases for a given grinding type. Generalized model of cutting force is obtained on the basis of fundamental regularities of mechanics of metal' plastic deformation by wheel grains in a cutting zone, kinematic of cutting process by abrasive grains under conditions of temperature and speed parameters during grinding, functionally related with cutting modes, geometrical parameters of a contact zone between a wheel and a workpiece, structural behaviors of processed material, wheel grains blunting.