Actual Problems in Machine Building 2016 No. 3

Actual Problems in Machine Building. 2016. N 3 Innovative Technologies in Mechanical Engineering ____________________________________________________________________ 184 43. Воевода А.А., Веретельникова Е.Л., Смагин Г.И . Проектирование двухканальных систем управления для специальных станков с учетом информации о стойкости инструмента и помехи измерения // Информационные системы и технологии, ИСТ–2000: международная научно-техническая конференция, 8–11 ноября 2000. – Новосибирск, 2000. – Т. 2. – С. 383– 389. THE APPROACH TO THE CONTROL OF THE DRILLING PROCESS BASED ON THE CONVEX TOOL LIFE MODEL Smagin G. I. , Ph.D. (Engineering), Associate Professor, e-mail: g.smagin@ngs.ru Karmanov V. S. , Ph.D. (Engineering), Associate Professor, e-mail: karmanov@corp.nstu.ru Fedin I. V. , Master’s Degree student, e-mail: ivan_fedin@outlook.com Novosibirsk State Technical University, 20 Prospekt K. Marksa, Novosibirsk, 630073, Russian Federation Abstract A method of calculating of the two-channel automatic control systems for metal-cutting equipment are proposed in this paper. Most research in this area are based on the traditional model of resistance of the cutting tool, the pre-emptive power form. The authors propose a convex exponential tool life model with one extremum, and based on this model, the method of calculating the optimum cutting conditions. The method of characteristic lines and characteristic surfaces are used in developing this approach. For the selected optimality criterion the characteristic line, on which are the optimal cutting parameters, is found. The specific value of the mode is determined by economic data belonging to the optimality criterion. In this paper it is proposed to apply the developed methodology to the design of machine tools with numerical control and automatic control systems. It is proposed to apply the control for torque stabilization. Examples of analytical problem solution of the optimal control in the case of simple models of depending of the torque from the modes and processing time. An example of the synthesis of controller for dual channel control is provided. The evaluation of the economic effect from the introduction of the developed technique is spent. The proposed method was investigated on life tests of the drilling process data, but can be used for other processing operations, such as whetting or milling, with the necessary adjustments. Keywords optimal drilling parameters, machines with system of automatic regulation, single-channel and two-channel control systems of drives for the machine, stabilization of a torsion torque on the tool, synthesis of regulators of the lowered order, models of firmness of the tool, rationing of the modes of processing, characteristic lines and characteristic surfaces, rationing of the modes of processing