scholarly journals Visualizing the Process of Forming a Shock Pulse in the Deformation Zone

2019 ◽  
Author(s):  
Андрей Киричек ◽  
Andrey Kirichek ◽  
Сергей Баринов ◽  
Sergey Barinov ◽  
Мария Рыжкова ◽  
...  
Keyword(s):  
Strain Hardening ◽  
Analytical Description ◽  
Surface Plastic Deformation ◽  
Process Conditions ◽  
Surface Plastic ◽  
Shock Pulse ◽  
Distribution Diagram ◽  
Microhardness Distribution ◽  
Dynamic Methods ◽  
Shock System

The article raises the problem of visualizing fleeting processes occurring as a result of wave strain hardening (WSH). The features of this method are unique capabilities for controlling the parameters of the shock pulse. This allows, in contrast to other dynamic methods of the surface plastic deformation, forming the desired microhardness distribution diagram in the surface layer at a depth of 6- 8 mm, while ensuring the required uniformity of hardening. The need to visualize this method is explained by the complexity of the analytical description of the ongoing wave processes in the shock system and the loading medium. Developing a visualization technique based on a model of the process of wave strain hardening consists of several stages. The stages include setting the initial and boundary conditions of the simulated elements, their physical-mechanical properties, loading conditions, the type of the mesh, the process conditions. The created model allows you to visually track the shock pulse movement after the striker hits the statically pressed waveguide against the loading medium, and at the same time to see the generation of the reflected deformation wave (the tail of the shock pulse) and its effect on the shock system elements and the loading medium. The results will make it possible to develop shock systems with the highest efficiency.

SELECTION OF THE DRIVE OF THE PULSE GENERATOR FOR WAVE DEFORMATION HARDENING

2020 ◽  
Author(s):  
Andrey Kirichek ◽  
Dmitriy Solovyev
Keyword(s):  
Strain Hardening ◽  
Pulse Generator ◽  
Surface Plastic Deformation ◽  
Surface Plastic ◽  
Impact Frequency ◽  
Metal Consumption ◽  
Pulse Generators ◽  
Energy Impact ◽  
Deformation Hardening ◽  
Selection Of

The article is devoted to the analysis of known structures of impact devices used in industry in order to obtain recommendations for their adaptation or when creating new structures for wave strain hardening by surface plastic deformation. The analysis was carried out on the used drive and on the main parameters of impact devices: impact energy, impact frequency, relative metal consumption and efficiency. The options are the best combinations of parameters for electric, pneumatic and hydraulic drives. Recommendations are given on the use of such devices, with appropriate adaptation, as pulse generators for wave strain hardening.

scholarly journals Engineering support for specified quality of parts surface layer under dynamic methods processing of surface plastic deformation

2016 ◽  
Vol 16 (3) ◽  
pp. 46-52 ◽  
Author(s):  
Mihail- Tamarkin- ◽  
Aleksandra- Shvedova-- ◽  
-Roman- Grebenkin ◽  
Sergey Novokreshchenov-
Keyword(s):  
Plastic Deformation ◽  
Surface Layer ◽  
Surface Plastic Deformation ◽  
Surface Plastic ◽  
Dynamic Methods

scholarly journals Modeling of quality characteristics of the surface layer hardened by free-moving indenters under rotating electromagnetic field

2016 ◽  
Vol 16 (3) ◽  
pp. 71-78
Author(s):  
Valery A. Lebedev ◽  
Anatoly A. Kochubey ◽  
Irina V. Chumak
Keyword(s):  
Electromagnetic Field ◽  
Surface Layer ◽  
Functional Model ◽  
Hardened Layer ◽  
Surface Plastic Deformation ◽  
Quality Parameters ◽  
Surface Plastic ◽  
Dynamic Methods ◽  
Dynamic Processing ◽  
Surface Layer Quality

It is shown that the magnetodynamic treatment implemented under the conditions of a rotating electromagnetic field is a kind of the dynamic methods of hardening free-moving indenters by the convection flows. It is proposed to use analytic dependences obtained by the approximation of the test data of effect of the surface plastic deformation (SPD) dynamic methods on the component hardened layer quality to evaluate quality parameters of the surface layer formed under the magnetodynamic processing. The resulting expression describing the experimentally established fact that the main contribution to the formation of the quality parameters of the hardened layer is made by the initial continuous coating of the treated surface with plastic prints is obtained. An analytical functional model establishing the surface layer quality parameters behavior depending on the multiplicity of covering the surface by the shock-pulse impact of the free-moving indenters is proposed. A comparative analysis of the experimental data obtained in the process of the magneto-dynamic processing with the calculated ones shows the applicability of the proposed models for predicting quality parameters of the hardened surface layer.

scholarly journals Investigation of the influence of the geometrical dimensions of the striker on the efficiency of energy transfer of shock pulses during wave strain hardening

2019 ◽  
Vol 297 ◽  
pp. 05012 ◽  
Author(s):  
Andrey Kirichek ◽  
Sergey Barinov ◽  
Aleksandr Yashin
Keyword(s):  
Energy Transfer ◽  
Strain Hardening ◽  
Pulse Energy ◽  
Deformation Zone ◽  
Geometric Parameters ◽  
Shock Pulse ◽  
Shock System ◽  
Deformation Area ◽  
Geometrical Dimensions ◽  
Shock Pulses

The article presents data on the influence of the geometric parameters of a flat-faced rod shock system on the efficiency of a shock pulse energy transfer to the deformation zone during wave strain hardening. As a result of the simulation, it was found that an increase in the ratio of the striker length to its diameter from 0.1 to 10 allows transferring 15.6 times more shock pulse energy to the deformation area. Changing the ratio of the lengths of the striker and the waveguide from 0.1 to 10 increases the share of the transmitted shock pulse energy by 2.8 times.

Reliability control of technological processes of parts processing by dynamic methods of surface plastic deformation

2020 ◽  
pp. 419-423
Author(s):  
M.A. Tamarkin ◽  
E.E. Tishchenko ◽  
T.S. Sosnitskaya ◽  
S.A. Novokreshchenov
Keyword(s):  
Plastic Deformation ◽  
Hardened Layer ◽  
Surface Plastic Deformation ◽  
Surface Plastic ◽  
Technological Parameters ◽  
Degree Of Deformation ◽  
Technological Processes ◽  
Dynamic Methods ◽  
Reliability Control ◽  
Deformation Treatment

The results of parts processing processes by dynamic methods of surface plastic deformation taking into account their reliability are presented. Dependencies are identified to determine surface roughness, depth of the hardened layer and degree of deformation for various dynamic methods of surface plastic deformation treatment. Processing time is defined. Studies of the considered technological processes reliability by technological parameters are carried out. Technological recommendations on design of technological processes and application of research results are given.

New methods for surface plastic deformation of low-rigidity cylindrical machine parts

2018 ◽  
Vol 2018 (8) ◽  
pp. 16-24 ◽  
Author(s):  
Семен Зайдес ◽  
Semen Zaides
Keyword(s):  
Plastic Deformation ◽  
Surface Plastic Deformation ◽  
Surface Plastic ◽  
High Productivity ◽  
Surface Strengthening ◽  
New Methods ◽  
Machine Parts

Technological potentialities at finish-strengthening processing of low-rigid parts of shaft- and axle types with local ways of machining impact are rather limited. In the paper there are considered new ways for strengthening allowing obtaining qualitative surface strengthening in machine parts at high productivity of an engineering procedure.

Plastic deformation of collector plates at electric motor repair

2020 ◽  
pp. 79-82
Author(s):  
D.YU. Belan ◽  
G.B. Toder ◽  
K.V. Averkov ◽  
YU.V. Titov
Keyword(s):  
Plastic Deformation ◽  
Electric Motor ◽  
Roughness Parameter ◽  
Surface Plastic Deformation ◽  
Analytical Dependence ◽  
Surface Plastic ◽  
Machined Surface ◽  
Tool Surface ◽  
Diamond Burnishing ◽  
Traction Electric Motor

A tool was developed for smoothing the plates of an electric motor collector. An analytical dependence of the roughness parameter of the machined surface on the force applied to the tool is obtained. Keywords traction electric motor, collector, diamond burnishing tool, surface-plastic deformation, repair, roughness. [email protected]

A Neutron Diffraction Investigation of Residual Stresses in Rail Ends after Severe Deformation of Rail Surfaces

2014 ◽  
Vol 777 ◽  
pp. 213-218 ◽  
Author(s):  
Chandrahas Rathod ◽  
David Wexler ◽  
Vladimir Luzin ◽  
Paul Boyd ◽  
Manicka Dhanasekar
Keyword(s):  
Neutron Diffraction ◽  
Residual Stresses ◽  
Vertical Plane ◽  
Surface Plastic Deformation ◽  
Primary Component ◽  
Rolling Contact ◽  
Surface Plastic ◽  
Stress Evolution ◽  
Test Rig ◽  
Complex Deformation

Insulated rail joints (IRJs) are a primary component of the rail track safety and signalling systems. Rails are supported by two fishplates which are fastened by bolts and nuts and, with the support of sleepers and track ballast, form an integrated assembly. IRJ failure can result from progressive defects, the propagation of which is influenced by residual stresses in the rail. Residual stresses change significantly during service due to the complex deformation and damage effects associated with wheel rolling, sliding and impact. IRJ failures can occur when metal flows over the insulated rail gap (typically 6-8 mm width), breaks the electrically isolated section of track and results in malfunction of the track signalling system. In this investigation, residual stress measurements were obtained from rail-ends which had undergone controlled amounts of surface plastic deformation using a full scale wheel-on-track simulation test rig. Results were compared with those obtained from similar investigations performed on rail ends associated with ex-service IRJs. Residual stresses were measured by neutron diffraction at the Australian Nuclear Science and Technology Organisation (ANSTO). Measurements with constant gauge volume 3x3x3 mm3 were carried in the central vertical plane on 5mm thick sliced rail samples cut by an electric discharge machine (EDM). Stress evolution at the rail ends was found to exhibit characteristics similar to those of the ex-service rails, with a compressive zone of 5mm deep that is counterbalanced by a tension zone beneath, extending to a depth of around 15mm. However, in contrast to the ex-service rails, the type of stress distribution in the test-rig deformed samples was apparently different due to the localization of load under the particular test conditions. In the latter, in contrast with clear stress evolution, there was no obvious evolution of d0. Since d0 reflects rather long-term accumulation of crystal lattice damage and microstructural changes due to service load, the loading history of the test rig samples has not reached the same level as the ex-service rails. It is concluded that the wheel-on-rail simulation rig provides the potential capability for testing the wheel-rail rolling contact conditions in rails, rail ends and insulated rail joints.

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