Yakym R. Scientific - applied principles of three-cone rock bits durability increase

The thesis is devoted to the problem connected with the durability increase of three-cone rock bits at all manufacturing stages. Much attention is paid to the durability and efficiency increase of V, VU, AU, bearing components, arm pins, cones, and insert rock-destroying equipment, and to the protection of rock bits against wear-and-tear across diameter. Owing to theoretical and experimental investigations the search-engineering problems of three-cone rock bits durability increase are solved in a new way. At means that it is necessary to base on the results of complex search-engineering problems solving at all stages of rock bits life cycle. At allows to solve complex of design and technological problems connected with manufacturing and mobile mastering of new competitive constructions and standard sizes of rock bits relying on the unifed process approach.