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 Ensuring the quality of the surface layer of parts in the processing of surface plastic deformation

2012 ◽  
Vol 1 (1(3)) ◽  
pp. 22-25
Author(s):  
Анатолий Андреевич Дудников ◽  
Александра Ивановна Беловод ◽  
Антон Александрович Келемеш
Keyword(s):  
Plastic Deformation ◽  
Surface Layer ◽  
Surface Plastic Deformation ◽  
Surface Plastic

Study of Surface Layer Hardening after Treatment Complex Tool

2020 ◽  
Vol 303 ◽  
pp. 89-96
Author(s):  
K.S. Mitrofanova
Keyword(s):  
Plastic Deformation ◽  
Surface Layer ◽  
Strain State ◽  
Experimental Studies ◽  
Surface Plastic Deformation ◽  
Surface Plastic ◽  
Technological Inheritance ◽  
Multiple Loading ◽  
Surface Layer Hardening ◽  
Solidified Body

The results of experimental studies of the thin surface layer of samples made of steel 45 after treatment with surface plastic deformation (SPD) multiradius roller (MR-roller) are presented. On the basis of the apparatus of the mechanics of technological inheritance, taking into account the effect of the solidified body, a model of the process according to the scheme of multiple loading-unloading of metal, taking into account the phenomenology of the SPD process and the properties of the material, is created. Distributions of parameters of the stress-strain state in the deformation centre are obtained, the parameters of roughness and microhardness of the surface layer are investigated.

Acoustic and Emission Control of the Hereditable Stress and Strain State of the Metal Surface Layer during Cutting and Surface Plastic Deformation

2015 ◽  
Vol 788 ◽  
pp. 3-10
Author(s):  
Valeriy Yu. Blumenstein ◽  
Fyodor I. Panteleenko ◽  
Igor V. Miroshin ◽  
Oleg A. Ostanin
Keyword(s):  
Plastic Deformation ◽  
Acoustic Emission ◽  
Surface Layer ◽  
Shear Deformation ◽  
Surface Plastic Deformation ◽  
Surface Plastic ◽  
Deformation Degree ◽  
Emission Signal ◽  
Experimental Findings ◽  
Surface Layer Quality

Methods and experimental findings shown describe how mechanical parameters of the surface layer behavior and acoustic emission signals are interconnected.Experimental study was carried out under conditions of simple single-and dual stage compression. Graphic and analytic dependencies between the counting rate of the acoustic emission Ṅ and the shear deformation degree Λ were revealed. The findings describing dual compression show that the acoustic emission method is sensitive to the material stressing history.The dependency of the acoustic emission signal energy on the pre-stressing program was found, which helped establish that, with values of the plasticity reserve depletion being equal for all experimental specimens, the accumulated shear deformation degree Λ was different.The findings describing the hereditable physical state of the strengthened surface layer of parts during cutting and surface plastic deformation are presented in the paper. The study was carried out using the methods of property accumulation control in deformation sites depending on treatment modes with real-time monitoring of acoustic emission signals. A peculiar feature of these methods is the use of visual recording of the metal plastic flow to be further used in calculating the hereditable parameters of the surface layer quality.

scholarly journals JUSTIFICATION OF APPLICATION MODES OF MACHINING ATTACHMENTS FOR PROCESSING PARTS BY THE METHOD OF PLASTIC DEFORMATION

2021 ◽  
pp. 136-141
Author(s):  
Д.Г. ЧУРИЛОВ ◽  
И.С. АРАПОВ ◽  
А.В. СТАРУНСКИЙ ◽  
С.Д. ПОЛИЩУК
Keyword(s):  
Plastic Deformation ◽  
Surface Layer ◽  
Economic Effect ◽  
Inertial Force ◽  
Quality Parameters ◽  
Surface Plastic ◽  
Technical Problems ◽  
Wide Range ◽  
Diamond Burnishing

Проблема и цель. Установлено, что функциональное действие машин в значительной мере определяется параметрами качества их поверхностного слоя. Цель работы – обеспечение качества поверхностного слоя деталей одним из наиболее эффективных способов, обеспечивающих управление в широком диапазоне показателями качества обработки деталей поверхностным пластическим деформированием (ОУО ППД). Одни и те же параметры качества поверхностного слоя можно получить, используя различные методы и режимы ОУО ППД. Для их оценки необходимо определение трудоемкости операции. Следовательно, имеет место совокупность научно-технических задач, решение которых позволяет разработать методологию, алгоритм и программу выбора оптимального метода и условий ОУО ППД, обеспечивающих требуемые параметры качества поверхности при минимальной технологической себестоимости, что дает значительный экономический эффект. Методология. Одним из способов обработки деталей при восстановлении служит алмазное выглаживание после процесса шлифования. Выглаживатель – кристаллический алмаз – перераспределят металл поверхностного слоя, при этом меняется микрорельеф. После алмазного выглаживания увеличивается надежность, долговечность деталей, износостойкость. Для достижения цели предлагается использование двухзвенных оправок, которые позволяют исключить биение обрабатываемой поверхности. Структурный эквивалент механизма близок к кривошипно-шатунному механизму, в отличие от которого радиус обрабатываемой детали распределяется по дуге. Изменения силы выглаживания устанавливают связь между статической силой и силой инерции. Статическую силу сглаживания можно определить, зная основные технологические параметры и процессы. Сила инерции зависит от массы подвижного звена оправки. Результаты. Результаты настоящего исследования показали: к числу задаваемых параметров относятся масса подвижного звена оправки, диаметр детали, скорость скольжения, эксцентриситет, постоянная механизма и сила инерции. Найдены разрешенные частоты вращения в зависимости от диаметра детали. Заключение. Данная методика может быть применена для восстановления рабочих поверхностей поршневых пальцев автотракторных дизельных двигателей сельскохозяйственного назначения и позволяет снизить уровень шероховатости поверхности обрабатываемых деталей. Problem and purpose. Problem and purpose. It has been established that the functional action of machines is largely determined by the quality parameters of their surface layer. The purpose of the work is to ensure the quality of the surface layer of parts by one of the most effective methods that provides control over a wide range of quality indicators for processing parts by surface plastic deformation (SPD). The same parameters of the quality of the surface layer can be obtained using different methods and modes of SPD. To assess them, it is necessary to determine the complexity of the operation. Consequently, there is a set of scientific and technical problems, the solution of which makes it possible to develop a methodology, an algorithm and a program for choosing the optimal method and conditions for SPD, which provide the required surface quality parameters at a minimum technological cost, that gives a significant economic effect. Methodology. One of the methods of processing parts during restoration is diamond burnishing after the grinding process. The smoother or the crystal diamond will redistribute the metal of the surface layer, thus changing the microrelief. After diamond burnishing, reliability, durability of parts, and wear resistance increase. To achieve the goal, it is proposed to use two-link mandrels, which allow to exclude the beating of the treated surface. The structural equivalent of the mechanism is close to the crank gear, in contrast to which the radius of the workpiece is distributed along the arc. Changes in the smoothing force establish a relationship between static force and inertial force. The static smoothing force can be determined by knowing the basic technological parameters and processes. The force of inertia depends on the mass of the moving link of the mandrel. Results. The results of this study showed that the parameters set included the mass of the movable link of the mandrel, the diameter of the part, the sliding speed, the eccentricity, the constant of the mechanism and the force of inertia. The permitted speeds were found depending on the diameter of the part. Conclusion. This technique can be used to restore the working surfaces of the piston pins of automotive diesel engines for agricultural purposes and can reduce the level of surface roughness of the processed parts

OUTLOOKS IN SURFACE PLASTIC DEFORMATION USE TO DECREASE SURFACE ROUGHNESS IN ROLLING MILL PARTS STRENGTHENED WITH SVS-ELECTRODE MATERIALS

2020 ◽  
Vol 2020 (8) ◽  
pp. 4-12
Author(s):  
Aleksey Makarov ◽  
Anna Titova ◽  
A. Afonin ◽  
Alexander Kudryashov ◽  
Aleksandr Vladimirov
Keyword(s):  
Surface Roughness ◽  
Plastic Deformation ◽  
Surface Layer ◽  
Rolling Mill ◽  
Mechanical Characteristics ◽  
Electrode Materials ◽  
Surface Plastic Deformation ◽  
Surface Plastic ◽  
Electrospark Alloying ◽  
Micro Hardness

The purpose of this work consists in ensuring the required quality of micro-geometry and mechanical characteristics of a surface layer in rolling mill parts, in particular, surface roughness no more than Ra=2.5mkm and micro-hardness no less than 900 kgs/mm2. To ensure such micro-hardness in samples of 60HN steel there were applied coatings With the method of electrospark alloying with the use as an electrode synthetic hard tool materials based on titanium diboride (STIM-11) and titanium carbide (STIM-40NA) made by the method of self-propagating high-temperature synthesis. EIL-coatings made of thses materials are characterized with the thickness of 30mkm, micro-hardness up to 980 kgs/mm2, that exceeds four times micro-hardness of a non-hardened sample, and with roughness Ra=5…10mkm. To decrease roughness of EIL-coatings made of STIM materials for the first time there was used surface plastic deformation with smoothing that is a novelty of this investigation. Smoothing was carried out on a screw-cutting lathe with the aid of a flattener with TC6 tungsten-cobalt hard alloy indenter (r=6mm) at the rotational frequency n=70rev/min and at the indenter longitudinal feed S=0.05mm/rev and the smoothing force P=500N. As a result of smoothing the micro-hardness of surface layers made 990kgs/mm2, and roughness – Ra=1.6…1.8mkm. Conclusion: smoothing contributes to the decrease of surface layer roughness from 3 times (STIM-40NA) to 5.5 times (STIM-11) at the conservation of their mechanical characteristics that proves the outlook in use of such a technology for finishing parts surfaces strengthened with SVS-electrode materials by STIM method of electrospark alloying.

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