KSHP. OMD №9-2017
Vorontsov A. L.
Industrial testing of the results of a combined reduction–mandrelling process researching
The technique of using the results of the conducted scientific research for a specific technological development of the combined process of reduction-mandrelling of bushes for the travel shaft of an aerospace product is given. The results of successful industrial testing of the developed technology are stated. Comparison of these results with theoretical predictions confirms the high accuracy and reliability of the calculation formulas.
Keywords: reduction; mandrelling; bushing production; plastic deformation; strain.
Loginov Yu. N., Puzanov M. P.
Modelling of cylindrical workpiece upsetting process using hill’s yield criterion
Using DEFORM-3D software the modelling of cylindrical workpiece upsetting process was carried out by finite element method. Von Mises yield criterion and Hill’s yield criterion were employed for isotropic and anisotropic materials respectively. The problem set for anisotropic material was solved in three variants with successive rotation of the largest flow stress direction along three coordinate axes. It was discovered that the base of the cylinder can take an oval shape when flow stress directions of various values lie in the base plane. In this case the smaller axis of the oval corresponds to the largest flow stress direction. When flow stress directions of various values lie in longitudinal section plane of the workpiece, its shape stays cylindrical.
Keywords: isotropic material; anisotropic material; upsetting; plastic deformation; DEFORM-3D software; finite element method.
Buzlaev D. V., Sobolev Ya. A.
FEM development of the gas forming process under conditions of irregular heating
The possibility of using SIMULIA Abaqus software for simulation of gas forming of hemispheres from titanium alloys under conditions of superplasticity with uneven radial heating of the billet is considered.
Keywords: superplasticity; titanium alloy; finite element model; hemisphere; Abaqus; gas forming.
Maksimov E. A., Ustinovsky E. P.
Modernization of a roller correct machine for quality increasing of thick steel sheets
The method of calculating of power consumption for the electric motor for straightening thick steel plates is improved, which makes it possible to increase the accuracy of calculations of the electric motor power by 10…15 % during modernizing the straightening units. The diagram of the algorithm for calculating the parameters of the straightening and power of the electric motor, as well as the bending moments for the multiroll straightening machine is given.
Keywords: edging of thick steel sheets; multiroll straightening machine; calculation of power consumption for the electric motor.
Maruschak L. N., Zheleznyak L. M., Zamaraev V. A.
Features of the production of bronze wire that meets the high-level requirements
Under the conditions of the current production, studies are carried out to improve the chemical composition of tin-zinc and nickel-chromium-silicon bronzes, to search for a rational technological procedure for deformation-thermal processing of wires from these alloys and to optimize the modes of thermal deformation processing of chromic zirconium-calcium bronze wire. Stable service properties of wire from these bronzes, meeting the strict requirements of regulatory documents, are obtained. The production of industrial batches of wire of the responsible electrical engineering has been organized, which has high physical and mechanical characteristics.
Keywords: reliable wire; complex bronze; strict standards requirements; modes of thermal deformation processing; optimization of chemical composition; stability of service properties; industrial batch of wire.
Tomilov M. F., Tomilov F. Kh.
The limited plasticity of sheet materials
The models of sheet materials destruction having anisotropic limited plasticity were examined. The methods of regular materials definition were developed. The reliability of the models was corroborated by experiments. The results of experiments allow to recommend the models for computer-design of sheet punching operations with the aim of prediction potential of workpieces destruction.
Keywords: model of destruction; sheet materials; limited plasticity; sheet punching.
Sosenushkin E. N.
XIII Congress «Kuznets-2017» «State and prospects of development of the national forming processes and forging and stamping equipment»
The article includes information about the September of this year, Smith XIII Congress 2017, held in the city of Ryazan, and dedicated to the problems of domestic forging and pressing machine-building and forging and stamping production.
Keywords: technologies; tools; equipment; forging and stamping production; modeling; modernization; production; operation; import substitution.