Neveshkin Y. Development of technological processes and equipment for bulk forging by explosion of aircraft engine parts

The object of the research is the process of die forging of workpieces of GTE parts by explosion method; the purpose of the research is to develop the technology of pulse die forging (explosive forming) of parts of the GTS and equipment for its realization; research methods - system analysis and complex consideration of the interconnection of technological parameters of the process of explosive forming, based on the theory of plasticity, methods of mathematical statistics and modern calculation methods; results - the technology of die explosive forming was expanded by refining the model of external technological loading and using mathematical models for simulation of high-speed deformation processes; technological processes have been developed. Obtaining of bulky workpieces: impeller (lead, AlMg2), shaft (07Cr12NiMoNbV extra quality), gear shafts (14CrMnSiNi2MoN extra quality), half coupling (18CrMnTi), gear pinion (14CrMnSiNi2MoN extra quality), distributor (OT4-1); novelty - two characteristic coefficients are introduced that are related to the time of the impact of the tail of the shock wave and the shape of the load pulse, on the basis of which the impulse pulse model from the shock waves is specified, which allows more accurately to calculate the energy parameters of obtaining the workpieces by forging; for the first time, the calculation of the parameters of the displacement and speed of the stationary pool under the influence of the energy of the explosion of the BW, which gave the opportunity to choose a rational load scheme; the mathematical models based on the DEFORM package have been refined and the possibilities of their use in the simulation of high-speed deformation processes have been clarified, which made it possible to determine more precisely the efforts that are applied to the technological die-forging equipment; the model of external technological load has been refined, which made it possible to assign rational parameters of the sources of load and to obtain quality workpieces; the degree of implementation - the results are introduced in the educational process of the Department of Technology of Aircraft Engines Manufacturing of the National Aerospace University "Kharkiv Aviation Institute", in the joint-stock company "Motor Sich"; the field of use is the treatment of metals by pressure in aviation and general engineering.