Ishchenko H. Technological assurance of the quality of manufacturing of complex-profile surfaces of turbine blades from titanium alloys

Object of research: technological process of manufacturing turbine blades from titanium alloys. Subject of research: rational structure of technological process, regularities of grinding and polishing operations of processing of complex-profile surfaces of turbine blades from titanium alloys, which provide quality, reduction of manufacturing complexity and stability of machining methods. The purpose of the dissertation work: quality assurance and reduction of labor intensity of processing of complex-profile surfaces of turbine blades from titanium alloys at improvement of grinding and polishing operations of technological process. Research methods: Theoretical research is based on the basic provisions of engineering technology, the theory of formation and the basics of forming the accuracy and quality of surfaces of machine parts. Improving the technology of manufacturing blades, finding a rational structure of the technological process and estimating the complexity of the options was performed using simulation methods. The optimality of the grinding process was determined using the method of multivariate experimental planning. Scientific novelty: on the basis of the system analysis of regularities of technological processes of manufacturing of details from difficult-to-process materials the new approach to quality assurance and reduction of complexity of processing of difficult-profile surfaces of turbine blades from titanium alloys at improvement of structure of technological process and parameters of finishing operations is developed and offered. Practical results: the technique of designing of rational structure of technological process of processing of difficult-profile surfaces of turbine blades from titanium alloys is developed, modern methods and means of control operations of technological process, grinding and polishing operations with use of highly structured abrasive wheels are introduced (Patent of Ukraine for utility model № 128773). The results were used in the development of technological processes for processing turbine blades from titanium alloys at JSC "Turboatom" (Kharkov), which reduced the complexity of manufacturing the blade by 30%, reduce the production cycle of the kit (100 pieces) for one row of turbines twice.