Simulation Model of the Cutting Speed Stabilization System for CNC Metal-Cutting Machine Tools

Abstract

In this paper a simulation model of cutting speed stabilization for numerical control machines was developed. The mode of cutting speed stabilization allows solving a number of technological problems, including the increase in machining productivity and the quality of the part surface, the increase in durability of the cutting tool.

Access to the functions of the basic software of CNC systems is limited. Taking this into account, this paper considers the functional and algorithmic features of the power parameter stabilization systems, as the basis for the further development of intelligent algorithmic support and software. The existing guidance on cutting conditions is based on empirical dependencies, the use of which for direct application in algorithms for the cutting process automatic control is difficult, since these dependencies determine the predicted, not the current, parameters. The non-stationary model was adopted as the basic structure of the process of shaping parts, the main non-stationary model parameters are determined by the three-dimensional kinematics of the universal machine. The generalized approach to the power parameter systems and the synthesis of the regulators of their main circuits made it possible to identify the simplest version of the structures based on the use of the regulators with parametric feedback. The functional model contains the main components of the CNC system: an interpolator, servo drives of feeds and main motion, as well as additional cycle and analysis modules. The high-speed processing of end surfaces and the conditions for the implementation of cyclic control tasks are considered. The simulation results confirming the performance of functional algorithms and the possibility of their use in intelligent CNC systems are presented.