G.V. Shadskiy - Dr. Sc. (Eng.), Professor, Tula State University E-mail: chief.gennadiischadscky@yandex.ru I.N. Isakov - Leading Process Engineer, JSC «KBP named after Academician A. Shipunov»; Post-graduate Student, Department «Technology of Mechanical Engineering», Tula State University E-mail: ISAKOVIVAN71@yandex.ru