Actual Problems in Machine Building 2015 No. 2

Актуальные проблемы в машиностроении. 2015. №2 Инновационные технологии в машиностроении ____________________________________________________________________ 33 CONSIDERATION OF POWER CONSUMPTION IN CHOOSING OPTIMAL MODES OF DRILLING Smagin G.I. , Ph.D. (Engineering), Associate Professor, e-mail: g.smagin@ngs.ru Karmanov V.S. , Ph.D. (Engineering), Associate Professor, e-mail: karmanovvitaly2000@gmail.com Yakovlev N.D. , Senior Lecturer Fedin I.V. , Master’s Degree student, e-mail: ivan_fedin@outlook.com Novosibirsk State Technical University, 20 Prospect K. Marksa, Novosibirsk, 630073, Russian Federation Abstract The paper addresses the issue of using exponential mathematical models of tool durability when choosing drilling conditions. Characteristic lines and characteristic surfaces are used in setting drilling conditions for various diameter drills from quick-cutting steel and for various machined materials. To optimize drilling conditions in terms of minimum expenses it is proposed to consider power consumption costs. A correction coefficient of an average-applied torque increase by 1.2-1.3 times is accepted when calculating power consumption for various cutting modes taking into account an increase in the torque in the process of tool wear. In terms of energy consumption the coordinate of the optimum cutting mode is displaced along the characteristic line towards higher performance in the two-factor field of machining conditions. Keywords cutting tool, drill, cutting speed, drill durability, torque, power consumption, energy saving