System of stabilization of power of cutting of a metalworking workbench

The paper is devoted the improvement of the system of stabilizing of cutting power of light milling machine. The working out urgency is caused by that known regulators which ensure high accuracy of maintenance of the set power level in steady states and high quality of transients, have complicate technical implementation with application of neural webs and fuzzy - control units. Their use essentially augments the machine tool price. Regulators which have simple technical implementation and the low price, maintain power of cutting in steady states with a considerable error and do not ensure stability of system of stabilization in the conditions of change over a wide range depth and width of cutting, hardness of a work piece and an instrument condition. The structure of system of stabilization of power of cutting offered in paper at simple technical implementation solves the specified contradiction. In system it is used two closed loops of regulating. The first closed loop contains negative feedback on power of cutting and a nonlinear link with saturation which ensures limitation of the maximum feed rate of a table of the machine tool. The second closed loop of regulating contains an integral regulator which in the conditions of change of the gain of machining process ensures change of a signal of the demanded power of cutting on an entry of an internal closed loop of regulating. Research of operation of system is carried out on model for a case of milling of steel preform in the conditions of change of a cutting depth by steps. Results of simulation testify that the offered system ensures high quality of transients in the conditions of change of a transfer ratio of process of machining,and in steady states power of cutting is maintained at the set level without an error.