MAIN STAGES OF CREATION OF A UNIFIED METHODOLOGY OF INTEGRATED STRUCTURAL AND PARAMETRIC OPTIMIZATION OF CIRCULAR GRINDING CYCLES WITH CNC

Abstract

At present, there are no various manufacturers of methodological and mathematical sup-port and software in CAD-systems, which allows designing optimal grinding cycles for CNC op-erations, what leads to the fact that the assignment of modes is carried out according to digitized data of the standards of the 60s... 80s. When assigning other processing parameters, the technol-ogist is forced to turn to his own experience. As a result, these grinding cycles require the proce-dure of adaptation to real production conditions by processing a number of test parts. This en-tails additional time and material costs. The technologist does not have time to design and ad-just a large stream of control programs for various parts, and, therefore, organizes the grinding of a large assortment of parts on universal machines. All this negates all efforts not only to auto-mate the stage of technological preparation of production in terms of designing control programs for CNC machines, but also to digitalize the entire machine-building industry in Russia. Thus, there is an urgent need to substantiate and implement a methodological platform of complex structural and parametric optimization of circular grinding cycles with CNC, which al-lows to perform the complex optimization of cutting modes and cycle control parameters con-sidering variable technological factors. The basis of this methodology is a digital twin of the cir-cular grinding process, which simulates the removal of the allowance in the grinding cycle under the effect of various unstable factors. The mathematical support of the methodological platform includes wide-range models of the cutting force, the shaping of the technological dimension and its errors in a given grinding cy-cle, considering variable compliance of the technological system, allowance, blunting of the wheel grains. The optimization of the grinding cycle is based on the method of dynamic pro-gramming with a given objective function and a complex of models of restrictions on accuracy, on the parameters of the technological system, on the characteristics of the grinding wheel, etc., considering variable processing conditions of the batch of parts.