Assurance of microgeometric state of parts surface made of plastic materials by ultrasonic machining

2020 ◽  
pp. 256-259
Author(s):  
Kh.M. Rakhimyanov ◽  
V.P. Gileta ◽  
A.G. Samul’
Keyword(s):  
Technological Parameter ◽  
Static Load ◽  
Rotation Speed ◽  
Surface Plastic Deformation ◽  
Surface Plastic ◽  
Ultrasonic Vibrations ◽  
Ultrasonic Machining ◽  
Plastic Materials ◽  
Motion Speed ◽  
Tool Motion

The possibility for using of surface plastic deformation when applying ultrasonic vibrations to the instrument to form microgeometric state of the parts surface made of copper M1 and aluminum alloy D16 are studied. Two ultrasonic machining schemes are compared: when the direction of vibration is normal to the surface of the part and tangent to this surface. It is shown that the use of tangent scheme changes the interaction nature of the tool with the surface of the part and the trajectory of the tool motion. It is established that the angle β between the direction of the rotation speed vector of the part and the vibration speed vector of the tool significantly affects on the microgeometry being formed. Therefore, angle β together with the main motion speed, feed, static load, frequency and amplitude of the tool’s vibrations, is technological parameter that extend the capabilities of tangential scheme in surface roughness forming. It is revealed that processing according to this scheme allows escaping the intensive flow of material in the deformation zone and the formation of waves on the surface of the part.

scholarly journals Impact of local deformation kinematics upon stressed state of surface layer

2019 ◽  
Vol 2019 (5) ◽  
pp. 32-48
Author(s):  
Семен Зайдес ◽  
Semen Zaides ◽  
И. Бобровский ◽  
I. Bobrovsky ◽  
Ван Фам ◽  
...  
Keyword(s):  
Computer Simulation ◽  
Plastic Deformation ◽  
Strain State ◽  
Surface Plastic Deformation ◽  
Local Deformation ◽  
Surface Plastic ◽  
Deformation Kinematics ◽  
State Changes ◽  
Process Computer ◽  
Tool Motion

A kinematics of a deforming tool motion for stress-strain state changes in the point of an elastic-plastic deformation and residual stresses increase at surface plastic deformation is developed. The results of a loading process computer simulation under different conditions of a deforming tool contact with a part which give a possibility to increase the effectiveness of a new method of the finishing-strengthening of orbital surface plastic deformation are shown.

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.

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.

Finish recovery of spools of grease lubricant stations

2021 ◽  
pp. 26-27
Author(s):  
V.A. Korotkov
Keyword(s):  
Plastic Deformation ◽  
Surface Plastic Deformation ◽  
Surface Plastic ◽  
Grease Lubricant

The finish recovery of spools of grease lubricant stations by surface ultrasonic plastic deformation and the use of carbonitration is considered. Keywords: spools, recovery, carbonitration, surface plastic deformation. [email protected]

scholarly journals CONTROL OF PART SURFACE PARAMETER QUALITY DURING PROCESSING WITH SURFACE PLASTIC DEFORMATION

2017 ◽  
Vol 2017 (8) ◽  
pp. 4-13
Author(s):  
Максим Нагоркин ◽  
Maksim Nagorkin ◽  
Владимир Федоров ◽  
Vladimir Fedorov ◽  
Анатолий Тотай ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Surface Plastic Deformation ◽  
Surface Plastic ◽  
Surface Parameter ◽  
Part Surface
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