The article describes the development of technology for the manufacture of steel piston rings by cold plastic deformation during drawing. It defines conditions of thermal treatment at recrystallisation tempering, thermofixation and thermostabilization. The paper also considers the calculation of degree of plastic deformation at drawing and the foundation of a choice of tool steels. It reflects research in the field of thermochemical treatment methods of drawing rolls and piston rings.

This article describes the impact of the wall thickness variation on the formation of the mechanical properties in the cross sections of parts punched by drawing with thinning details. It offers a model of wall thickness variation forming in the multi-operational drawing with thinning processes that considers the influence of the geometry of the working tool and the accumulated strain.

The article considers the design of the die to extrude hollow parts with an internal flange of the tubular blank. The description of the stamp and its design.

The article contains the technology of the preparation of the level surfacehardening, mechanical characteristics and structure of rolled used for cold die forging, eliminating the costly operations annealing furnaces and mechanical turning of surface defects.

The article considers the relevance of the use of two-layer structures of spherical plugs of ball valves as well as the advantages of technology for their manufacture process-based on stamping over traditional methods. The experimental study showed the technological capability of manufacturing processes by metal forming billets and it also gives recommendations on the correlation of the outer and inner layers of the spherical shell plug ball valve.

Manufacture of long hollow parts specified internal profile of the hard-deformable alloys based on process improvement of cold deformation of a tubular workpiece requires the development of science-based modes of technology to assure the quality of products, reduction of the complexity of manufacturing, steel intensity etc. Stress-strain state and energy-power parameters of the rolling-drawing process non-driven roller tubular billet on the profile mandrel is define by computer analysis that have been made. The shape and dimensions of mandrel corresponded to the inner surface of the rifle barrel with the polygon profile type. As a result, it has been developed and manufactured the corresponding technological device and has been manufactured the product by above method.

The article describes the engineering method to obtain the correlation for the determination of stresses on the contact surfaces of the workpiece and the tool, the efforts of the extrusion of cavities by spherical die. It shows numerical simulations made ​​on computer simulation by the finite element method on examples of extrusion by spherical die of billets made of R6M5 (Р6М5) steel under the action of counter-pressure on the free surface of the workpiece. The paper contains the definition of the maximum counter-pressure through simulation that provides extrusion without destruction and the efforts of the processes, the distribution of stresses in the deforming tool and the stress-strain state, the degree of resource use of metal plasticity, as well as the final product dimensions. The article contains a description of the experiment on the extrusion billets of steel R6M5 (Р6М5) spherical die.

The article describes the research of upsetting process for parts with a rectangular head. It describes the modeling of a combined upsetting process for bolts with rectangular head. The FEM system Q-Form is used for 3D modeling. The paper contains the original data and simulation results.

The article describes the processes of formation of roll-formed sections with a predetermined longitudinal curvature. It contains a research of the theoretical foundations of a plastic hingeformation in the deformation zone and the management of its properties.

The article consists of research results that shows the way how to produce slip-rings made ​​of beryllium bronze with the use of sheet stamping and heat treatment. It shows the properties of the elongated semi-finished parts and their structure at various stages of the proposed scheme.

The paper considers the system control process over design process of successive separating stamps for cold sheet stamping. It shows structural and logical formulas that reflect the possible design options of these stamps with the proposed character of parts and components. This article also describes the correspondences between the elements of the subsets of a separating stamp to describe the parametric object structure, using methods of discrete mathematics.

This article describes a method flanging round holes in sheet blanks and profiles which consists of the steps of forming holes cold extrusion to produce a profiled workpiece, punching coffers and flanging.The product after the flanging has a constant wall thickness and a smooth cylindrical surface.The article contains an engineering method to determine the dependence for determining forces of flanging profiled billet spherical punch and the size of the source profile. It shows flanging holes processing profiled billet and flanging with thinning which was carried out by finite element method and it also shows the comparison of results of two methods.

The paper describes the experimental study of an axisymmetric two-layer workpiece forming with viscoelastic bonding layer. It shows the distribution of thinning of layers in radial the direction is received. It is revealed that the distribution pattern of thinning of the outer and inner layers of the cross section of the billet significantly differ.

The article considers the analysis of defects in the production of thin sections on multi-roll pilot production roll forming machine. This paper also describes an experimental selection of possible ways to eliminate defects.

The article considers the ways to prepare samples with chemical removal of the zinc layer. This describes an indirect method of determining material properties of the thin layer in a multilayer metal.

The article shows the calculated dependences and the results of experimental work on gas shaping of spherical shells of tanks.

This paper reflects the comparative studies based on modeling of technological forging processes of part type "movable plate" in the industrial technology base used by CJSC "Azovelectrostal" (Mariupol, Ukraine) and the new technology proposed by the results of preliminary research and developed recommendations.

The article considers the methodology of designing groove of sectors-die-rolling workpiece in the oval and round gauges. The result of analyzing the experimental data obtained by the regression equation allows to consider the rolls springing and the irregularity in widening of workpiece in die groove design

The article discusses the new technology forging forgings with spikes on the universal crank hot press.

The article contains the study of the properties of thermal barrier coatings applied to the precision forging of compressor blades from high-temperature steels EP-866 (ЭП-866).Under production conditions was studied the influence of changes in the composition of thermal barrier coatings. The article presents the stamping results of compressor blades using thermal barrier coatings and die lubricants on colloidal-graphite-based.

The article considers the ways of low- and non-waste manufacture of ring forgings plastic deformation managed cross-extrusion.

This article describes a new mathematical model of stamping products in split die on the universal hydro-pressure equipment from high-strength materials. It describes the calculations of materials pressure in split die stamping of cross billet that is made from aluminium Amg6 (АМг6) and titanium ВТ6С alloys. The work contains the comparison of the experimental research results with theoretical data.

Bulky components of crucial purpose such as shafts and rotors take an important place in heavy engineering industry. The basic method of their production is forging by drawing.

The paper presents results of determination and industrial verification of cooling cycles in thermomechanical processing (TMP) of steel AISI 4130, designed to produce good combination of strength and ductility directly after forging and quenching. The results indicate possibility of replacement costly high alloy steels with common grades offering higher strength in combination with good plasticity after cost-effective TMP cycles utilizing blast-air cooling from controlled forge end temperature.

This article describes the mathematical model of stripe deformation at steel sheet rolling in four-high stand. The authors presented a methodology for quantifying the effect of self-leveling lengthening across the width of the strip.

In this article the authors have proposed a mathematical model to calculate the thickness distribution of the product when drawing of axisymmetric parts in the stamp with multisection rotating discs for correction of technological parameters of the process. The model considers the mechanism of stress-deformed state, geometrical relations and approximation algorithm. Euler's method was used to solve the problem allowing determine the parameters of the next step of integration, basing in the previous results. This algorithm allows to make quick adjustments with the appearance of additional conditions and can be recommended for the calculation of the technological parameters of the technological process.

The paper contains general positions and the results of the analysis of the stress state in the elementary volume, as well as the impact of such technological parameters as a factor of frictional coefficient and value of the relative deformation on the results of the upset process.

Using the simulation results it was shown an optimal correlation of the size and porosity of powder compacts and also the amount of counterpressure recommended for the production of equal channel angular extrusion of workpieces with high-density of deformation zone that is large enough for subsequent direct extrusion powder of parts with high mechanical properties.The article defines the maximum depth of the cavity in direct extrusion through the research of plasticity resource. This paper describes the developed technology of manufacturing high-density parts of the "glass" type with the consistent application of the equalchannel angular and direct extrusion.

In the design of metal forming processes it is widely used to obtain a linear model of damage accumulation and scalar failure criterion. The process of plastic deformation can be described by the kinetic equation of nonlinear dynamics for systems with a strong positive correlation. This paper considers the failure criterion and condition of deformation without destroying in multi-step process of plastic deformation. Check of applicability of criterion showed that it can be used for solving practical problems of processing of metal forming processes.

The article describes alternative methods of solving the boundary value problem of determining the stress-strain state of the visco-plasticdeformable body in relation to the processes of semi-hot die forging processes using the theory of heredity, which establishes the relationship between stress and strain considering the speed and the history of the loading process.

The article contains a review of the scientific literature on the springback issue. This review describes the work on the analysis and theoretical argumentation for springback. It shows the classical methods of springback calculation that are used in its forecasting. This paper consist of modern research about the springback issue, mathematical analysis, experimental research (springback of the laminated materials).

This article considers the stress-strain state of the billets under pinching of tapered die on the basis of the mathematical model. Basic relations obtained in the theoretical analysis can assess stress in the deformation zone and to determine the strain field and calculate the length of the original tube billets.

The article considers an influence of thickness variation on the stability of tube billets at pinching in stepped tapered dies. It describes the corresponding mathematical model that allows to predict the loss of billets stability at pinching in the design stage of the technological process.

We propose a parameter state of stress as the sum of the principal stresses relative to the odds of their influence. Influence coefficients are mechanically-mi material properties. Plasticity chart with this indicator is proposed to approximate the exponential function. Checking for different materials showed sufficient proximity of the experimental points to a diagram of plasticity. Recommendations are given for determining the coefficients of arbitrary types of tests. The minimum number of tests - 4.

This article describes the results of the application of an axisymmetric rigid-plastic finite element membrane model to the research of the process of forming by a spherical die and process of hydraulic bulging into a flat bottomed die. The results of numerical simulations are compared with experimental data.

The article shows the influence of process parameters on the ultimate capabilities of forming that depends on different destruction criteria of rotary drawing process with wall thinning made from anisotropic material.

This article describes the mathematical model of the process combined radial-reverse part extrusion type of glass with a flange for identifying energy-power parameters of the process and explore the gradual and the final forming of the billet. It shows a comparative analysis of the phase-forming patterns based on the proposed computational scheme, finite element modeling and experimental data.

The article describes the research of parts upsetting process with a rectangular head. It shows a scheme of calculation by power balance method for the upsetting rectangular bolts head.

The article describes the determination of the stresses in the sheet metal flattening by pressure.

This article describes a modeling procedure of material’s mechanical test during the abrupt change of the strain rate. Simulation results were compared with the data obtained experimentally. The numerical simulation was performed in the FE-program QFORM. The paper describes the selection of areas for further research related to the definition of mathematical models of deformation resistance, and it also contains the software requirements for the simulation of mechanical tests.

This article describes the design of the horizontal counterblow hammer and principle of its operation. The purpose of its development is to improve the timing accuracy of oncoming traffic impact of the masses. The result is the development of new design that combines hydraulic synchronization mechanism and a horizontal layout of the hammer

The article considers abilities of magnetic methods of non-destructive testing (in particular, measurement of coercive field) for determination of damaging and remaining life of dies material and equipment. This article describes the experimental determination of principles for the instrument used for hot (bulk) and cold (sheet and volumetric) forging.

The paper considers the results of experimental and theoretical research of the impact at upsetting blanks on hammers in hot deformation, showing the possibility of increasing the contact time of the hammer head with a workpiece, increasing the degree of deformation of the workpiece, reducing the strength of deformation in upsetting and increase efficiency in the use of blow of hammer head with a filler and confirming the earlier data on upsetting lead blanks.

The article describes the implementation of thermographic method for determining the yield stress, as applied to three-dimensional models with the use of specialized mountings.

The paper describes the research of springing of a multilayered material. It shows the comparison of springing of a single-layer and multilayered sample. The article considers the change character of springing that depends on a bend angle and internal radius.

The article describes the technology of deep cold die forging of parts which are made from low-alloy steel 20 and also the methodology of the experiment, revealed the effect of the number of stamped billets on the final temperature of the part

This paper describes experiments and analysis on the upsetting between approaching rigid plates of a thin plastic sample, limited fixed walls and originally shaped rectangle or sector. Fixed wall located along the long rectangle sides and along the radial sector boundaries. It describes the definition of experimental laws, which allows to choose the corresponding mathematical model.

This article describes the calculation of the force stamping elongated forging at different temperatures in the open die by the M.V.Storozhev’s formula and compares the effort with stamping identical forgings as a result of the finite-element modeling. Options regarding corrections formulas are offered.

The article contains elaborate algorithms and techniques of the design process sheet, flat-and-edge rolling and drawing of long semi-finished products for the production of jewelry made of precious metals and their alloys. This paper describes the developed software, which allows one to calculate deformation modes and energy-power parameters of the designed processes with the visualization of the data in tabular and graphical form.It also describes the process of adaptation of the developed CAD systems for production conditions jewelry chains of gold 585 at JSC "The Gulidov Krasnoyarsk Non-Ferrous Metals Plant".

The article describes simulation of the existing technological process of step forging that is used at JSC “Metallurgical Plant “Electrostal” for production a round profile by using the finite element method.