Ivanova M. Technological assurance of productivity and quality hole-making of parts of hydropneumatic systems by combined axial tool

The object of research - the manufacturing process of hole-making operations in parts of hydropneumatic systems. The aim of the thesis is to increase the productivity of the manufacturing process and to ensure the quality of hole-making operations in parts of hydropneumatic systems with a combined axial tool. Methods of research: analytical studies based on the theoretical foundations of mechanical engineering, theory of metalcutting, theory of strength of materials, probability theory and mathematical statistics, system analysis. Mathematical modeling was carried out on the basis of the provisions set theory and the theory of multi-criteria choice, the algebra of logic. Simulation of mode of deformation of the combined axial tool was based on the finite element method in the Creo Parametric 2.0 and Creo Simulate 2.0 software. The reliability of theoretical studies confirmed the results of experimental studies carried out in laboratory and production conditions. The mathematical processing of the results was performed with the use of Microsoft Office Excel, MathCAD software. Theoretical and practical results: the technique of choosing the optimal structure and design parameters of combined axial tool; the technique of a choice of rational modes of cutting; developed recommendations for correcting the location of the error and deviation of the hole axis; suggested combined axial tool design. Scientific novelty consists in the fact that the stated principles of the choice of structure and destination parameters in the development of technological processes combined axial tool. To do so: for the first time developed a mathematical model of the rational structure of the combined axial tool; first proposed an idea hole machining route with the combined axial tool algebra of logic; improved mathematical relationship axial cutting forces in the processing step of the combined axial tool because of its heat from thermal effects that arise as a result of processing the previous stage; theoretically defined conditions for the occurrence of cutting forces on the steps of the combined axial tool parameters which form a accuracy of a hole; identified technological heredity influence on the characteristics of precision machining holes combined axial tool and their improvement through rational distribution of the total allowance, rented by a given law. The implementation degree: the results of the research used in the development of technological hole machining processes in detail, which are produced at the company public corporation "Techma-M" (Kharkiv) and in the educational process of mechanical engineering and metal-cutting machines, and hydraulic drive hydra-pneumatics NTU "KhPI". Application area: enterprises of machine-building industry in the development of technological processes of processing of details hydropneumatic systems, as well as in higher education institutions in the preparation of specialists in mechanical engineering.