Thesis for the degree of a Candidate of Engineering Sciences, specialty 05.01.01 – Applied geometry, engineering graphics. – Kyiv National University of Construction and Architecture, Kyiv, Ukraine, 2018.
The urgency of this research is due to the need for practice in the flexible management of various processes in the design and manufacture of technical objects by constructing dynamic computer geometric models.
The dissertation is devoted to the further progress of the methodology of structural-parametric geometric modeling on the basis of development of new methods and techniques of dynamic shaping of industrial products. The research was carried out at the National Technical University of Ukraine «Igor Sikorsky Kyiv Polytechnic Institute» at the department of descriptive geometry, engineering and computer graphics in accordance with the state budget research theme «Theory of structural-parametric geometric modeling as a means of complex optimization of processes of automated design and production» and the research theme «Automated variant geometric modeling of technical objects».
The dynamic shaping of technical products is the object of research. Dynamic geometric models constructed by means of structural-parametric modeling are the subject of research.
The following methods were used to solve the identified tasks: analytical, differential, descriptive and computational geometry; mathematical analysis; theory of algorithms, approximation and interpolation, sets and graphs, optimization, computer programming, design of technical objects, engineering technology; computer graphics.
The following theoretical and practical results with a scientific and practical value are obtained during the implementation of the dissertation.
The modern state of dynamic shaping of technical objects is analyzed. On the basis of this, perspective directions of further research are determined, which consist in providing practice needs in more accurate computer geometric models that reproduce production processes.
The basic principles (system approach, variability, universality and unification, optimality, openness and development, complex approach) of the theory of structural-parametric geometric modeling are supplemented by the new principle of dynamic shaping.
The new concept of computer dynamic shaping in the form of theoretical foundations is proposed on the basis of this methodology. These developments have become the basis for the corresponding new methods and techniques of automated geometric modeling.
The following new methods of computer dynamic geometric modeling of industrial products are developed: the way of universal, unified and integrated modules; the method of controlled dynamic shaping; the method of combining design and technological geometric models of cutting tools. The presented methods and the practical techniques of automated design developed on the basis of them allow to reduce the creating periods of computer dynamic geometric models, increase their accuracy and realism, improve the quality of many processes of designing and manufacturing of technical objects.
New dynamic computer models of such engineering processes as drilling, turning, milling and riveting, designing the aircraft wing surface and assembling the construction of the spar are created on the basis of the proposed methods and techniques. These models, for example, due to the use of precise trajectories of the movement of the instrument, the corresponding velocity values and acceleration of working and auxiliary moves, etc., improve the accuracy of the definition of various technological parameters and characteristics, contribute to their optimization.
The implementation of the received scientific results is carried out: at the Research and Production Association «Kyiv Automatics Plant» in the form of the proposed theoretical foundations, methods and techniques of computer dynamic shaping in the design and technological works and production of prototype gyroscopic devices, which ensured the improvement of the quality of complex technical objects and the productivity of their development processes; in the design and technological bureau "Marineks" (Kyiv) in the form of techniques for the dynamic shaping of technical objects in the development of navigation devices, which contributes to improving the quality of the technical products; in the educational process of the National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute" in teaching of the discipline "Engineering and Computer Graphics" to students of machine-building specialties, which ensures their familiarization with new tendencies of geometric modeling of technical objects in modern systems of automated designing.
The directions of the further development of the theory and practice of dynamic shaping of technical objects on the basis of the structural-parametric methodology are determined, which consist in im
