KSHP. OMD №2-2024

A. L. Vorontsov, D. A. Lebedeva (The Bauman Moscow State Technical University, Moscow)
Investigation of backward-and-forward extrusion of tumblers with a co-bottom part.

Part 22. Methodology for calculating technological parameters taking into account the temperature effect of deformation

A method is presented for calculating the energy-force and deformation parameters of the process of combined extrusion of tumblers with a co-bottom part, taking into account the temperature effect of deformation. Hardening of the extruded material is described in detail. The given formulas make it possible to determine such important parameters of the stamping process as the total and specific deforming force, as well as the maximum pressure on the die wall.
Keywords: forging; tumblers with the co-bottom part; backward-and-forward extrusion; stresses; deformations.

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

Investigation of the stress concentration of a rectilinear circuit using the functions of a complex variable

The work is devoted to the measurement of stresses. When developing technological processes of cold stamping and selecting specific geometric parameters of the tool and the workpiece, it is important what the average degree of deformation is implemented in the operation and whether the strength criteria of the workpiece and the tool are exceeded. An analytical method is proposed to study the stress concentration in the vicinity of a rectilinear contour. The expression of the distribution of the components of the stress tensor in the vicinity of this cavity is obtained by the methods of functions of a complex variable.
Keywords: stress; complex variable function; elasticity theory; stress function; rectilinear contour.

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

The task of elastic plastic contact of a tool with a wear-resistant coating

The paper considers the problem of elastic plastic contact of a tool with a wear-resistant coating. The contact processes are influenced by the coating structure. A decrease in the parameters of the contact length, chip shrinkage and an increase in the shear angle compared with these parameters for an uncoated instrument was found. The research results indicate the possibility of controlling the characteristics of chip formation and contact processes, which reduces the level of plastic deformation during chip formation for coated tools.
Keywords: chip formation zone; cutting tools; contact processes; wear-resistant coating, plastic deformation.

D. V. Evdokimov (Bauman Moscow State Technical University, Moscow)

Study of the influence of kinematic parameters of rolls on the quality of rolling

The work examines the influence of the kinematic parameters of rolling mill rolls, such as the feed speed of the mandrel and axial rolls, the angular speed of the main roll on the operational and physical properties of the product. A model for maintaining the ring temperature in the required range has been developed, and the strengths and weaknesses of this approach are considered.
Keywords: ring rolling; finite element method; temperature control; mandrel speed.

I. N. Ganiev (State Institution «Center for Research of Innovative Technologies of the NationalAcademy of Sciences of Tajikistan», Dushanbe, Republic of Tajikistan); B. B. Eshov, S. U. Khudoiberdizoda (SSI «V. I. Nikitin Institute of Chemistry of the National Academy of Sciences of Tajikistan», Dushanbe, Republic of Tajikistan); O. H. Niezov (Tajik National University, Dushanbe, Republic of Tajikistan); S. E. Otajonov (Khujand State University, Khujand, Republic of Tajikistan)

Temperature dependence of heat capacity and changes in thermodynamic functions of Рb-Сu alloys

In the work, the heat capacity of lead alloys with copper is determined in the «cooling» mode according to the known heat capacity of a reference sample of copper grade M00. Polynomials describing the temperature dependence of the heat capacity and changes in the thermodynamic functions of alloys of the Rb-Si system are obtained. It is established that with increasing temperature and copper content, the heat capacity, enthalpy and entropy of lead increase, and the Gibbs energy values decrease.
Keywords: lead-copper alloys; heat capacity; cooling mode; enthalpy; entropy; Gibbs energy.

I. A. Dudkevich (Aviaexpert LLC, Federal Air Transport Agency, JSC HeliBuro, Moscow); E. S. Ananyeva (Polzunov Altai State Technical University, Barnaul)

Experimental study of the thermochemical properties and kinetics of the deformation process of fiberglass materials

The characteristics of epoxy binders based on ECD resin (curing enthalpy, reaction rate) are experimentally measured using NETZSCH equipment. The method for determining the kinetic parameters of plastic deformation is used to obtain the values of the effective activation energy. It is presented that activation energy can influence the plastic flow of a material, determining its ability to deform and machine. The experimental studies of thermochemical properties and kinetics of the polymerization process can be used when optimizing technological processes for heat treatment of products.
Keywords: fiberglass; residual stresses; plastic deformation; binder composition; compound.

G. A. Gareeva (Kazan National Research Technical University named after A. N. Tupolev - KAI, Naberezhnye Chelny); O. Yu. Gerasimova, N. R. Zakirova (Naberezhnye Chelny State Pedagogical University, Naberezhnye Chelny); A. A. Mirsaitova (Kazan Innovative University named after V. G. Timiryasov, Naberezhnye Chelny); A. G. Fayzullina (Kazan (Volga Region) Federal University, Naberezhnye Chelny Institute, Naberezhnye Chelny)

Automation of the process of working with documents using information systems

The article describes the process of developing a module to automate the process of creating and sending documents, allowing to reduce the cost of working with documents, speeding up the process and reducing the likelihood of errors, reducing the burden on enterprise employees.
Keywords: automation; information systems; Filemaker Pro; documents.