Kargin S. Improvement of the process of shafts forging by application of profiled tools

The object of investigation - technological process, tooling and blanks for shafts forging. The work's objective- improvment of technical and economic indices at shafts forging by means of profiled tools due to development of scientific points of acievement of 3-4 rays forged blanks from standard ingot. methods of investigation and appliances- numerical mathematical modelling by means of the slip-line field method and the finite elements method, experiments at lab conditions and industrial eneterprises. Theoretical and practical results obtained -Theoretical models, methods of automatic evaluation and also recommendations, regarding new resources-friendly industrial processes of sfafts forging. The innovation -establishing of regularities of stressed-deformed metal state at obtaining of 3-4 rays forged blanks, this making it possible to determine the most rational forging schemes; establishing of the influence of profiled tools geometry and main technological parameters of forging upon changes of shape, stressed-deformed and thermal ingot's state at the process of forging, it allowing to determine the temperature modes and prescribe the required degree of reducing; establishing of regularities of dimension changes of axial defects, it allowing to determine the optimal technological modes of shafts forging.Degrees of implementation- practical recommendations, recarding perfection of shafts forging with profiled tools. The results of the work have already been implemented at "NKMZ" PSC and "Ilych" iron and steel works PSC. The sphere of application- forging and pressing shops of mechanical engineering and iron and steel enterprises, and also at branch scientific reserch institutes.