MODERN TECHNOLOGIES FOR THE RESTORATION OF MACHINE PARTS

2021 ◽  
Vol 1 (142) ◽  
pp. 154-161
Author(s):  
Alexander Kostyukov ◽  
Keyword(s):  
Mechanical Properties ◽  
Adhesive Strength ◽  
Physical And Mechanical Properties ◽  
Main Property ◽  
Polymer Coatings ◽  
Polymer Materials ◽  
Research Purpose ◽  
Properties Of Coatings ◽  
Machine Parts ◽  
Metal Polymer

At repair enterprises, various metal-polymer materials are used to restore the interfaces. Metal-polymer materials can be filled with the following components: steel, bronze, aluminum, titanium. The main advantages of metal polymers are their resistance to negative environmental influences, mechanical friction and high temperatures. (Research purpose) The research purpose is in analyzing the possibilities of metal-polymer materials for effective use in the restoration of machine parts and to give suggestions for improving their physical and mechanical properties during the restoration work. (Materials and methods) Authors studied metal-polymer materials of well-known companies: "Belzona" (USA), "Durmetal" (Switzerland), "Diamant" (Germany), "Loctite" (USA), Chester Molecular (Poland). The article presents the data on their use in the restoration of various parts. The metal polymer materials of foreign companies are characterized by stable quality and high physical and technical characteristics; domestic materials are still inferior to imported ones due to the low quality of the incoming components. (Results and discussion) The main property of coatings is the adhesive strength, which largely determines the resource of the restored part. The main factors that affect the adhesive strength are described in the article. It is possible to significantly increase the adhesive strength of the coatings due to the preliminary electric spark treatment of the worn part. The article presents data on the effectiveness of electric spark coatings as an independent technological process in the restoration of the part. The use of a combined technology of electric spark processing with subsequent application of metal-polymer materials provides undeniable advantages in the restoration of parts. (Conclusions) To improve the physical and mechanical properties of coatings, it is advisable to combine the technology of electric spark processing with the use of metal-polymer coatings. This will expand the possibilities of using part recovery technologies.

MODERN TECHNOLOGIES FOR THE RESTORATION OF MACHINE PARTS

2021 ◽  
Vol 1 (142) ◽  
pp. 154-161
Author(s):  
Alexander Yu. Kostyukov ◽  
Keyword(s):  
Mechanical Properties ◽  
Adhesive Strength ◽  
Physical And Mechanical Properties ◽  
Main Property ◽  
Polymer Coatings ◽  
Polymer Materials ◽  
Research Purpose ◽  
Properties Of Coatings ◽  
Machine Parts ◽  
Metal Polymer

At repair enterprises, various metal-polymer materials are used to restore the interfaces. Metal-polymer materials can be filled with the following components: steel, bronze, aluminum, titanium. The main advantages of metal polymers are their resistance to negative environmental influences, mechanical friction and high temperatures. (Research purpose) The research purpose is in analyzing the possibilities of metal-polymer materials for effective use in the restoration of machine parts and to give suggestions for improving their physical and mechanical properties during the restoration work. (Materials and methods) Authors studied metal-polymer materials of well-known companies: "Belzona" (USA), "Durmetal" (Switzerland), "Diamant" (Germany), "Loctite" (USA), Chester Molecular (Poland). The article presents the data on their use in the restoration of various parts. The metal polymer materials of foreign companies are characterized by stable quality and high physical and technical characteristics; domestic materials are still inferior to imported ones due to the low quality of the incoming components. (Results and discussion) The main property of coatings is the adhesive strength, which largely determines the resource of the restored part. The main factors that affect the adhesive strength are described in the article. It is possible to significantly increase the adhesive strength of the coatings due to the preliminary electric spark treatment of the worn part. The article presents data on the effectiveness of electric spark coatings as an independent technological process in the restoration of the part. The use of a combined technology of electric spark processing with subsequent application of metal-polymer materials provides undeniable advantages in the restoration of parts. (Conclusions) To improve the physical and mechanical properties of coatings, it is advisable to combine the technology of electric spark processing with the use of metal-polymer coatings. This will expand the possibilities of using part recovery technologies.

scholarly journals STRENGTH OF MULTILAYER POLYMER PIPE TAKING INTO ACCOUNT CHANGE IN PHYSICAL AND MECHANICAL PROPERTIES OF THE MATERIAL

2021 ◽  
Vol 2 (11(75)) ◽  
pp. 68-77
Author(s):  
G. Aliyev ◽  
A. Aliyev
Keyword(s):  
Mechanical Properties ◽  
Adhesive Strength ◽  
Chemical Properties ◽  
Physical And Mechanical Properties ◽  
Mechanical Effect ◽  
Polymer Materials ◽  
Physical And Chemical Properties ◽  
Physical And Chemical ◽  
External Loads ◽  
And Chemical Properties

Strength if a multilayer polymer pipe under the action of the system if external loads is studied taking into account the change in physical and mechanical properties of the material. Mechanical effect, the dependence of joint deformability of several polymer materials on the character of change if their physical and chemical properties was established. Occurrence and dependence of physical and chemical properties of the material and also breaking stresses between the layer determining adhesive strength of layered polymer pipe was established.

Final plasma hardening the details of peristaltic pumps

2020 ◽  
pp. 150-161
Author(s):  
Pavel A. Topolyanskiy ◽  
Sergey A. Ermakov ◽  
Andrey P. Topolyanskiy
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Physical And Mechanical Properties ◽  
Operating Conditions ◽  
Plasticity Index ◽  
Research Purpose ◽  
Peristaltic Pump ◽  
Properties Of Coatings ◽  
Plasma Hardening ◽  
Peristaltic Pumps

Improving the reliability and durability of peristaltic pumps is urgent. (Research purpose) The research purpose is to consider the operating conditions of peristaltic pump saddle, determine the causes of wear, develop a methodology for selecting the optimal coating, conduct research on the physical and mechanical properties of coatings and test them for microabrasive wear. (Materials and methods) The process of finishing plasma hardening with diamond-like DLCPateks coating was chosen for research based on the analysis of well-known industrial coating technologies. The article describes the studied physical and mechanical properties using the nanoindentation method on the TI 750Ubi nanohardness tester (Hysitron, USA) and conducted tests under microabrasive wear conditions on the Tribotester 103PC device to analyze the effectiveness of using this coating in comparison with other wear-resistant coatings. (Results and discussion) It was found by studying the physical and mechanical properties of the DLCPateks coating with a thickness of about 1 micrometer applied by the final plasma hardening method that its wear resistance parameters are: the plasticity index is 0.14-0.16, the plastic deformation resistance is 0.41-0.57. It was noted that the closest analog according to these characteristics is a diamond-like a-C:H coating, applied by the method of physical deposition of coatings in a vacuum, has a value of the plasticity index of 0.1-0.16. (Conclusions) The article describes the result of testing under microabrasive wear conditions, the coefficient of wear resistance of the DLCPateks coating. The results of studies of the physical and mechanical properties of the DLCPateks coating applied by the final plasma hardening method have shown its effectiveness in improving the reliability of peristaltic pump saddles.

Possibilities of using biodegradable polymeric materials in the agricultural sector

2020 ◽  
Vol 67 (2) ◽  
pp. 115-120
Author(s):  
Raisa A. Alekhina ◽  
Victoriya E. Slavkina ◽  
Yuliya A. Lopatina
Keyword(s):  
Mechanical Properties ◽  
Biodegradable Polymers ◽  
Biodegradable Polymer ◽  
Agricultural Sector ◽  
Polymeric Materials ◽  
Polymer Materials ◽  
Limiting Factors ◽  
Research Purpose ◽  
Biodegradable Materials ◽  
Advantages And Disadvantages

The article presents options for recycling polymers. The use of biodegradable materials is promising. This is a special class of polymers that can decompose under aerobic or anaerobic conditions under the action of microorganisms or enzymes forming natural products such as carbon dioxide, nitrogen, water, biomass, and inorganic salts. (Research purpose) The research purpose is in reviewing biodegradable materials that can be used for the manufacture of products used in agriculture. (Materials and methods) The study are based on open information sources containing information about biodegradable materials. Research methods are collecting, studying and comparative analysis of information. (Results and discussion) The article presents the advantages and disadvantages of biodegradable materials, mechanical properties of the main groups of biodegradable polymers. The article provides a summary list of agricultural products that can be made from biodegradable polymer materials. It was found that products from the general group are widely used in agriculture. Authors have found that products from a special group can only be made from biodegradable polymers with a controlled decomposition period in the soil, their use contributes to increasing the productivity of crops. (Conclusions) It was found that biodegradable polymer materials, along with environmental safety, have mechanical properties that allow them producing products that do not carry significant loads during operation. We have shown that the creation of responsible products (machine parts) from biodegradable polymers requires an increase in their strength properties, which is achievable by creating composites based on them. It was found that the technological complexity of their manufacture and high cost are the limiting factors for the widespread use of biodegradable polymers at this stage.

scholarly journals Creation of Polymer Coatings for Improving of Protective Properties of Surfaces

2021 ◽  
Vol 12 (2) ◽  
pp. 2698-2702
Author(s):  
A.A. Orekhov, Et. al.
Keyword(s):  
Mathematical Modeling ◽  
Mechanical Properties ◽  
Polymer Coatings ◽  
Strength Properties ◽  
Structural Elements ◽  
Properties Of Coatings ◽  
Mechanical Loads ◽  
Protective Properties ◽  
Modeling Methods ◽  
Metal Plates

In this paper, the preparation of polymer coatings on the surface of metal structural elements is considered to improve their physical, mechanical and strength properties. It is shown that the behavior of substrate samples under mechanical loads can be estimated using mathematical modeling methods. The properties of coatings and the mechanical properties of coated and uncoated metal plates have been evaluated. Methods for constructing mathematical models of metal plates of various structures are proposed.

scholarly journals Adhesion-strength and tribotechnical properties of machine-building composite polymer coatings

2021 ◽  
Vol 264 ◽  
pp. 05032
Author(s):  
Soyibjon Negmatov ◽  
T Ulmasov ◽  
M Karshiyev ◽  
Z Makhammadjonov ◽  
O Abdulayev ◽  
...  
Keyword(s):  
Adhesion Strength ◽  
Adhesive Strength ◽  
Polymer Coatings ◽  
Machine Building ◽  
Polymer Materials ◽  
Tribotechnical Properties ◽  
Extreme Character ◽  
Relative Change ◽  
Temperature Time ◽  
Degree Of Filling

The article presents the results of studies of adhesive, strength and tribotechnical properties of composite polycaproamide polymer materials and coatings based on them for mechanical engineering purposes. It has been established that the relative change in the adhesion strength depends on the degree of filling in air and in argon has an extreme character passing through a maximum for coatings based on PCA with aluminum oxide, and for coatings made of PCA with copper oxide, it has a complex character. The formation of adhesive, strength, and tribotechnical properties of filled polycaproamide coatings was also studied. At the same time, it was found that by adjusting the temperature-time technological modes, it is possible to increase the adhesive, strength, and tribotechnical characteristics of composite polycaproamide coatings for machine-building purposes.

Present Status and Key Challenges of Carbon Nanotubes Reinforced Polyolefins: A Review on Nanocomposites Manufacturing and Performance Issues

2009 ◽  
Vol 17 (4) ◽  
pp. 205-245 ◽  
Author(s):  
K. Prashantha ◽  
J. Soulestin ◽  
M.F. Lacrampe ◽  
P. Krawczak
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotube ◽  
Physical And Mechanical Properties ◽  
Emerging Technology ◽  
Polymer Materials ◽  
Scientific Principles ◽  
End Use ◽  
And Performance ◽  
Commercial Applications ◽  
Comprehensive Discussion

Carbon nanotube reinforcement is a key emerging technology to simultaneously impart enhanced mechanical properties while adding multifunctional characteristics to polymer materials and systems. The promise of extraordinary improvement in-end use properties of polyolefin/carbon nanotube hybrid systems has spurred great interest and intensive activity in academics and industries. This review offers a comprehensive discussion of the preparation, compounding, properties and applications of such nanocomposites. The processing, dispersion and orientation of nanotubes, as well as the characterisation of physical and mechanical properties of carbon nanotube filled polyolefins are discussed. In particular the scientific principles and mechanisms in relation to the methods of manufacturing are highlighted, with an outlook towards commercial applications.

scholarly journals STUDY OF PERFORMANCE INDICATORS OF POTATO HARVESTING MACHINES WITH MODERNIZED WORKING BODIES

2021 ◽  
pp. 112-119
Author(s):  
Д.В. ЕВТЕХОВ ◽  
Р.В. БЕЗНОСЮК ◽  
С.Т. КОДИРОВ ◽  
Г.К. РЕМБАЛОВИЧ ◽  
Н.С. ЖБАНОВ
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Moisture Content ◽  
Performance Indicators ◽  
Physical And Mechanical Properties ◽  
Climatic Conditions ◽  
Polymer Materials ◽  
Dynamic Loads ◽  
Comparative Performance ◽  
Working Bodies

Проблема и цель. В процессе уборки картофеля меняются почвенно-климатические условия, урожайность, свойства убираемых клубней и поэтому уборочный комплекс должен гибко реагировать на эти изменения. Это предполагает не только своевременную настройку рабочих органов, но и более широкие возможности современных картофелеуборочных машин. Цель – совершенствование картофелеуборочных машин на основе применения полимерных и композиционных материалов. Методология. Появление в бункере комбайна клубней с повреждениями, ушибами (потемнение мякоти) свидетельствует о значительных динамических нагрузках рабочих органов. Предлагаемый сепарирующий элеватор имеет гибкие композиционные прутки, которые взаимодействуют с обрезиненными роликами-интенсификаторами и при движении образуют волнообразную, постоянно меняющуюся поверхность. При поступлении картофельного вороха гибкие композиционные прутки прогибаются, причем чем больше масса поступающего картофельного вороха, тем больше величина прогиба прутков. При изменении почвенно-климатических условий значительная нагрузка приходится на органы выносной сепарации, поэтому увеличение производительности и снижение повреждений клубней является важной задачей. Для повышения эффективности работы продольной прямоточной пальчиковой горки был предложен многокулачковый встряхиватель с регулируемой частотой и амплитудой воздействия. Благодаря колебательным воздействиям полотна пальчиковой горки картофель приобретает дополнительную подвижность, что позволяет более полно использовать различия физико-механических свойств клубней и примесей. Результаты. Применение сепарирующего элеватора с композиционными прутками увеличило сепарирующую способность картофелекопателя на суглинке нормальной влажности (22 %) и снизило повреждения клубней на 2,6 %. Сравнительные показатели качества работы комбайна Grimme DR-1500, оборудованного модернизированной горкой с многокулачковым всряхивателем и серийного комбайна Grimme DR-1500 соответственно составили: полнота уборки – 97,3 % и 95,8 %; полнота выделения примесей – 94,1% и 86,8 %; процент повреждений клубней –2,47 % и 3,15 %. Заключение. Увеличение интенсивности сепарации на рабочих органах из композиционных и полимерных материалов позволяет увеличить производительность картофелеуборочных машин. Problem and purpose. In the process of harvesting potatoes, the soil and climatic conditions change, the yield properties of the harvested tubers, and therefore the harvesting complex must respond fexibly to these changes. This presupposes not only the timely adjustment of the working bodies, but also the wider possibilities of modern potato harvesters. The goal is to improve potato harvesters based on the use of polymer and composite materials. Methodology. The appearance of tubers with injuries in the bunker of the combine with bruises (darkening of the pulp) indicates signifcant dynamic loads of the working organs. The proposed separating elevator has fexible composite rods, which interact with rubberized intensifer rollers and, when moving, form a wavy, constantly changing surface. When the potato heap arrives, the fexible composite rods bend, and the greater the mass of the heap, the greater the defection. With a change in soil and climatic conditions, a signifcant load falls on the external separation organs, therefore, increasing productivity and reducing damage to tubers is an important task. To increase the efciency of the longitudinal direct-fow hedgehog slide, a multi-cam shaker with an adjustable frequency and amplitude of action was proposed. Owing to the vibrational efects of the hedgehog slider, the potato acquires additional mobility, which allows more full use of the diferences in the physical and mechanical properties of tubers and impurities. Results. The use of a separating elevator with composite rods increased the separating capacity of a potato digger on loam of normal moisture content (22%) and reduced damage to tubers by 2.6%. Comparative performance indicators of the Grimme DR-1500 combine equipped with a modernized slide with a multi-cam shaker and the Grimme DR-1500 serial combine, respectively, were: completeness of cleaning –97.3% and 95.8%; completeness of separation of impurities – 94.1% and 86.8%; percentage of damage to tubers –2.47% and 3.15%. Conclusion. An increase in the intensity of separation on working bodies made of composite and polymer materials allows increasing the productivity of potato harvesters.

scholarly journals COMPLEX GEOMETRIC EVALUATION OF POLYMER MATERIALS QUALITY

2021 ◽  
pp. 90-93
Author(s):  
E. V. Derbisher ◽  
I. V. Germashev ◽  
O. V. Kolyaganova ◽  
R. A. Evdokimov ◽  
V. E. Derbisher
Keyword(s):  
Mechanical Properties ◽  
Polymer Material ◽  
Comparative Evaluation ◽  
Physical And Mechanical Properties ◽  
Polymer Materials ◽  
Computational Technique ◽  
Mechanical Parameters ◽  
Geometric Criterion ◽  
Industrial Impact ◽  
Homogeneous Set

A computational technique of comparative evaluation of polymer material quality in a homogeneous set of samples according to a complex geometric criterion is proposed. Samples of physical and mechanical parameters of samples of industrial impact-resistant polystyrene are used for calculation. The most averaged complex of physical and mechanical properties is used as the calculation base.

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