Монографії (КМПМ)

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Now showing 1 - 5 of 5
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    Metal cutting in tasks for machine tool designers
    (Prof. Marin Drinov Academic Publishing House of Bulgarian Academy of Sciences, 2022) Krol, O.; Кроль, О. С.; Krol, O. S.
    In the monograph, the theoretical and logical bases of solving problems related to the research of the cutting process of structural steels and alloys are considered. The approach to the study of cutting tool geometry based on a logical analysis chain a research of cutting wedge geometrical parameters from the cutting scheme construction through the coordinate planes to the angles of a cutting tool is carried out. Problem solution on determining kinematic angles of cutters when machining curvilinear contour on NC machine is considered. Analysis of various physical phenomena occurring at metal excess layer removal from the workpiece is performed. Study of physical phenomena is based on the concept of the term "Cutting" as a set of simultaneously performed processes of elasticplastic deformation of the cut layer, cutting tool wear and blunting as well as the formation of the machined surface of the part. The peculiarity of the cutting tool wear process taking into account the simultaneous effect of abrasive, adhesive, thermal and oxidative effects in the process of cutting is noted. The analytical apparatus and algorithms of optimum cutting modes search with the use of linear and geometrical programming methods and Lagrange multipliers method are given. A software-methodological complex geometrical programming for solving nonlinear problem with components in positive posinomials form is implemented. A software-methodological complex on based Lagrange multipliers method for determine a qualitative picture of cutting processes when the structure and modes change is implemented.
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    Machine Tool Spindle Dynamics For Designers
    (Prof. Marin Drinov Academic Publishing House of Bulgarian Academy of Sciences, 2020) Krol, O.; Кроль, О. С.
    The monograph considers the problems of assessing the dynamic quality of projected metal-cutting machines, their shaping spindle units. The procedures for solving problems of dynamics by the method of initial parameters and transfer matrix are presented. The features of the spindle assembly formalization as an elastic system "Spindle-Arbor-Tool", with modeling the spindle joint with the conical connection of the arbor by the matrix of the elastic-friction hinge are considered. The problem of elastic-deformative description of the spindle-arbor link of high-speed machines is presented as a quasi-static problem, taking into account the action of inertial centrifugal forces and gyroscopic moments at a steady state of motion. The software has been developed for assessing the frequency characteristics of metal-cutting machines elastic systems in the mathematical environment MATLAB. A study of the stability of the spindle assembly using tools D-partitions based on the analysis of the number of roots of the characteristic equation. For leading designers and specialists in the field of machine tool system dynamics, researchers, teachers, graduate students and students.
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    Modelling And Calculation Of Machine Cutting Tools For Designers
    (Prof. Marin Drinov Academic Publishing House of Bulgarian Academy of Sciences, 2021) Krol, O.; Кроль, О. С.
    The monograph deals with the design, calculation and modelling of gear cutting tools. Calculation forms are proposed for the creation of tools structures working by the methods of form-generating and form-copying. Three-dimensional and parametric models of worm wheel hob and worm spline cutters, shaper-type cutters and interlocking disk milling cutters in the environment of integrated CAD KOMPAS-3D and APM WinMachine using specialized applications “CAD Mills” have been built. Calculation forms for determining the geometric, kinematic and design parameters of worm wheel hob for the manufacture of spur and helical gears based on the original contour profile of a standardized gear rack are given. An interactive design of a worm wheel hob in the KOMPAS system was carried out. The design stage of determining the characteristics of the flank-shaped tooth profile modification to reduce the noise level and increase the service life of the gear transmission has been effectively implemented. An interactive procedure for designing a worm spline cutter in the KOMPAS environment for finishing spline shafts is proposed. At the stage of replacing the theoretical profile of the cutter tooth edge with an arc of one circle or tangent arcs of two circles, an express procedure for calculating the magnitude of the error is used. Computer design and research of the shaper-type cutter using the application program “Shaper cutter” in the KOMPAS-3D environment was performed. It is shown that for non-standard shaper-type cutters it is possible to use a standard helical copier of a gear shaping machine if the angle of teeth inclination is 150±0.50 or 230±0.50. A comprehensive study of interlocking disk milling cutters using the application program "Disk milling cutter" in the CAD KOMPAS contour was carried out. Parametric models of the disc cutter design are built using the syntax of the CAD APM WinMachine. The parametric models of a single- and double-relief tooth, as well as the involute profile of the tooth lateral surface, have been identified.
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    Selection Of Machine Tools Optimal Cutting Modes For Designers
    (Prof. Marin Drinov Academic Publishing House of Bulgarian Academy of Sciences, 2020) Krol, O.; Кроль, О. С.
    The monograph discusses the problems of finding optimal cutting modes for the operation of turning, drilling and milling on machines of various types. Formulations of optimization problems in single and multi-criteria versions are given. Methods, algorithms and programs for solving problems of choosing optimal cutting conditions are proposed. The application features of the geometric programming methods by zero and first degree of difficulty are considered and the area of their rational use is defined. A toolkit for solving nonlinear technological problems by the method of Lagrange multipliers for cases of two- and three-pass treatments has been developed. Models and algorithms for solving multicriteria problems by methods of criteria convolution, consecutive climb-down and the “ideal point” are created. For leading designers and technologists, specialists in the field of computer-aided design of technological systems, scientists, lecturers, graduate students and students
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    Методы и процедуры 3D-моделирования металлорежущих станков и инструментов
    (СНУ ім. В. Даля, 2015) Кроль, О. С.; Krol, O.
    У монографії розглянуті проблеми побудови та дослідження тривимірних моделей проектованих металорізальних верстатів. Наведено інструментарій створення твердотільних моделей устаткування фрезерно-свердлильно-розточувального типу в середовищі інтегрованої САПР КОМПАС-3D. Розглянуто особливості та ефективні прийоми побудови компонентів верстатних та інструментальних систем з використанням параметризації конструкцій і фотореалістичного уявлення в модулі Artisan Randering. Проведено дослідження шпиндельних вузлів методом кінцевих елементів за допомогою модуля АРМ FEM на базі їх 3D-моделей. Запропоновано нові конструкторські рішення, що відносяться до зубчастих пасових передач шевронного профілю і беззазорних черв'ячних передач у вигляді 3D-моделей Для провідних конструкторів і фахівців в області тривимірного моделювання та дослідження верстатних систем, науковців, викладачів, аспірантів і студентів.