KSHP. OMD №11-2024

V. N. Chudin (Tula State University, Tula)

Drawing of a box-shaped product under viscoplastic forming conditions

The relations for calculating the force mode of single-operation drawing with heating of low boxes made of high-strength alloys are given. The hot material of the blanks during deformation is assumed to be anisotropic, viscoplastic, relaxing at a given degree of forming. The calculated dependencies are obtained on the basis of the energy upper-bound theorem of plasticity. A discontinuous field of displacement velocities is used. The calculated results are given.
Keywords: anisotropy; viscoplasticity; deformations; speed; power; specific force.

V. V. Karzhavin, V. Yu. Zhukova, (Ural Federal University, Ekaterinburg)

Construction of a generalized dependence for corrosion-resistant steel by upsetting method

A method of experimental construction of a diagram of the generalized dependence σi–εi–Hi for steels 12Х18Н10Т and 1Х18Н9Т is described. Approximating dependences for calculating the stress intensity based on the known degree of deformation and hardness measurement are obtained.
Keywords: deformation; stress; hardness; approximating dependences.

A. I. Kanareykin (Russian State University for Geological Prospecting (MGRI), Moscow)

The effect of the deformation rate on the thermally stressed state in the metal cutting process

The article is devoted to the mechanics of metal cutting. It examines the deformed state in the chip formation zone during metal cutting. Cutting, like all types of pressure treatment, involves plastic deformation of the material being processed. Using the stepwise compression method, it is shown that the specific work of compression depends only on the magnitude of the relative shift.
Keywords: blade processing; cutting tools; compression deformation; stepwise compression method; chips; degree of deformation.

A. I. Kanareykin (Russian State University for Geological Prospecting (MGRI), Moscow)

The problem of cooling a limited cylinder

The work is devoted to the issues of thermal conductivity. It addresses the issue of cylinder cooling. At the same time, the process itself is non-stationary. When finding a solution, the Fourier variable separation method is used for the thermal conductivity equation, which reduces the solution of the problem to a zero-order Bessel differential equation. The solution itself is obtained in the form of a double row.
Keywords: temperature field; cylinder; thermal conductivity; unsteadiness; eigenvalues; eigenfunctions; bessel function; neumann function.

V. G. Shibakov, D. L. Pankratov, A. M. Valiev, M. M. Rudnev (Naberezhnye Chelny Institute of Kazan Federal University, Naberezhnye Chelny)

Recycling of spent pipes by hot die forging into hollow forgings

The article is devoted to the analysis and development of technologies for the deformation of tubular blanks aimed at increasing the wall thickness. A process flow chart for recycling tubular pipes into forgings for the manufacture of couplings is proposed.
Keywords: recycling; tubular blank; upsetting; modeling.

E. V. Ramenskaya, L. V. Ruchkin, A. S. Sysoev, P. A. Snetkov, L. P. Sysoeva (Reshetnev Siberian State University of Science and Technology, Krasnoyarsk)

The main stages of manufacturing and control of end cutting tools

The article is developed to the improvement of the main stages of end milling cutter manufacturing and analysis of their wear resistance. An instrumental configurator for the development of technical specification for the production of end milling cutters and an algorithm for writing control programs for their production on СNC grinding and sharpening machines are proposed, the influence of cutting modes on the accuracy and quality of the cutting edges of the cutter is investigated, the durability period of the cutter is determined, recommendations on the preparation of production and operating of end cutting tools are proposed.
Keywords: cutting tool; end milling cutter; technical specification; algorithm; control program; grinding and sharpening cutting modes; tool wear; durability period.

N. M. Bobrovsky, P. N. Shenberger, R. U. Kamenov, A. V. Savelyev, D. A. Bezrukavnikov, S. V. Chernyakin (Samara Scientific Center of the Russian Academy of Sciences, Samara)

Thermal model of virtual tests of surface plastic deformation technology

The article is devoted to the procedure for conducting a virtual experiment on the implementation of strengthening technology of surface plastic deformation. The experiment is based on the approaches of model-oriented system engineering. The synthesis of the calculation system based on typical functional blocks of LS-DYNA is carried out. It is noted that the digital thermal model corresponds to the experimental data.
Keywords: virtual tests; surface plastic deformation technologies; digital thermal model.

A. V. Lutyanov (MIREA – Russian Technological University, Moscow)

Features of the electronic model of the part for the development of the technological process

The paper considers the issues of forming the surfaces of a part with the basics of designing the technological process of mechanical surface treatment in an automated interactive mode. It is shown that the use of an electronic model is more effective in practice, not only in the design of the process, but also for work in editing operations, and taking into account the general principles of planning the process in mass production. Under the condition of the formation of an electronic model, the issues of evaluating the manufacturability of the design of the main parts of the assembly unit in the conditions of automated design are considered. Modern technologies of designing and creating a 3D-model with changes in the design and technological documentation are considered. The application of approximation is justified when complicating the design of the assembly unit and the accuracy of body parts. The paper deals with the formation of details with the basics of the analytical process. It is shown that the efficiency in practice of using electronic models is not only in the design of the process, but also work in conditions of simpler operations and the addition of large volumes of process control in conditions of increased production.
Keywords: computer-aided design; electronic model; mechanical surface treatment; machining accuracy; quality; 3D design; approximation.