Nastasenko V. Design of prefabricated cutting tools and lateral unrecoverable plates for their equipment on the basis of system-morphological approach

The dissertation is devoted to solving an important scientific and practical task - the creation and design of prefabricated cut-off cutters, disk mills, face mills and ring drills, equipped with lateral replaceable unrecoverable plates (LRUP). The basis of the work is laid by the method of morphological analysis, which covers all possible variants of performances and allows conducting a full analysis of them with the selection of the most appropriate solutions. The complex systems algorithmic development and production of products and its methodology are proposed, which takes into account the needs of society, the level of its socio-economic and scientific and technological development in the conditions of the entire life cycle of the technical objects. The main feature of LRUP is the presence of sharp cutting edges on the narrow side faces of the plates. These LRUP, in combination with radial and tangential unrecoverable plates, complete the cubic scheme of their installations in the cutting tools. The calculating dependences for constructive and geometrical parameters of the LRUP have been substantiated and found, the conditions for reducing the allowances to their processing, and ensuring the greatest strength and the best convergence of the shavings. For cut-off cutters triangular LRUP with flat chamfer on the vertexes surfaces or arched grooves on the vertexes are recommended. They create a reliable fixation in the wedge-shaped pocket of a cut-off tool, and their manufacture is the simplest in conditions of any type of productions. They LRUP excel and prevail from Corocut-3, Multicut, Pentacut, because they increase the cut radius from 10 to 24 mm and reduce the cost of the tool material by one cutting edge. Square LRUP with arched grooves are even more efficient, but in cut-off cutters they require manufacturing of a pocket of complex shape for their placement. New types of disk milling cutters with lateral installation of LRUP, that reduced the minimum cutting width from 10 to 6 mm, and face milling cutters with LRUP for finishing are created, which can complement the cutting process of the deformed processing. Annular drills with mechanical fastening of LRUP have been developed, which reduce the minimum diameter of drilling from 70 to 12 mm without limits of the maximum diameter. Industrial tests and laboratory research of the offered instruments confirmed their efficiency, which allows recommending their wide implementation with the development of the State Standard of Ukraine (DSTU).