Actual Problems in Machine Building 2016 No. 3

Актуальные проблемы в машиностроении. 2016. №3 Технологическое оборудование, оснастка и инструменты ____________________________________________________________________ 345 THE INCREASE OF DRILLS WITH RMP OPERABILITY DUE TO THE CUTTING PLATE EDGE PROFILE CHANGE Bakanov A.A. , Ph.D. (Engineering), Director, e-mail: alekbaknov@yandex.ru Kuzbass State Technical University named after T.F. Gorbatchev, Institute of Information Technology, Machine Building and Transport, 28 Vesennaya st., Kemerovo, 650000, Russian Federation Abstract When drillings in the volume tempered rails the problem – low operability of this type of the tool arises combined drills with replaceable multiface plates from a firm alloy. The main reason for it is presented in this article is existence of an unbalanced of cutting force radial component . The technique of design of a profile of cutting plate edge based on compensation of an unbalanced radial component of cutting force on each elementary working site of the cutting plate edge due to formation of cutting edge slope in the plane of the cutting allowing to minimize an unbalanced radial component of cutting force on each this site is offered. The flowchart for calculation of the cutting plate edge profile is submitted. This technique allows to increase operability of the composite drills on average for 30%. Keywords Composite drill, the increase of operability, replaceable multiface plate, the cutting edges profile, the cutting edge slope, an equilibration of the cutting forces radial component