Malii K. Improving of manufacturing process for rod parts with flange based on the application of combined radial-longitudinal extrusion

Object of research - process precision forging extrusion. The aim of the work is to increase the efficiency of processes of precise three-dimensional punching of pivot parts with a flange based on the use of methods of combined radial-longitudinal extrusion and the development of recommendations for the design of stamping processes, which reduce the labor intensity and energy intensity of the technological process. Methods of research - energy method of the upper assessment (the balance of power), the finite element method, the methods of physical modeling and strain gauging to measure technological forces, the method of dividing grids to determine the deformed state of the workpieces. Theoretical and practical results - on the basis of established regularities of power and deformation modes, methods of designing the technological process of radial-longitudinal extrusion of rod parts with flange have been developed; software based on mathematical models has been developed that allows to determine the reduced pressure and formations in the processes of radial-direct and radial- reverse squeezing of the rod parts with flange, taking into account the actual geometry of the process, the scheme and conditions of deformation. Novelty - on the basis of theoretical studies, the influence of the parameters of the rod parts with flange the sequence of the shaping of the workpiece and the increase in the size of the workpiece in different directions were determined, taking into account the deformation schemes and friction conditions with the axial-symmetric radial-longitudinal extrusion; on the basis of the results of the analysis of the stress-deformed state by the finite element method, dangerous zones with intensive landslide deformations were found in the deformation cell, for which the estimation of the cost of the resource of plasticity was performed. Introduction - new technological processes and tools for punching the rod parts with flange, have been tested and accepted for implementation in production. Scope - metal forming, precise forging