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Published: Wednesday, 19 April 2023 17:23
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Volume 14 (2), April 2023, Pages 135-146
Agali Guliyev1, Ibrahim Habibov2, Aynur Sharifova3, Zohra Garayeva4
1Dosent, department of “Materials science and processing technologies”, Azerbaijan State Oil and Industry University, candidate of technical sciences, Azerbaijan. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
2Professor, Director of the design center “Engineer”, Azerbaijan State Oil and Industry University, Doctor of technical sciences, Azerbaijan. Email: This email address is being protected from spambots. You need JavaScript enabled to view it.. https://orcid.org/0000-0003-3393-7812
3Dosent, department of “Materials science and processing technologies”, Azerbaijan State Oil and Industry University, Azerbaijan. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
4Teacher, “Industrial Machines”, Azerbaijan State Oil and Industry University, Azerbaijan. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.. https://orcid.org/0000-0001-8824-623X
ABSTRACT
In the present work, the influence of the composition of the electrolyte and the duration of electropolishing of the base metal on the strength of adhesion to iron deposits was studied, and the method of mechanical treatment before applying electrolytic coatings was shown to determine not only the microgeometry of the surface, but also the physicochemical state of the metal in the surface layer, thereby affecting the protective properties. oxide film. On the other hand, the type of machining affects the cost of restoring and coating parts. Therefore, it is practically important to determine the effect of the method of machining and the surface finish of the base metal on the adhesion strength with electrolytic iron deposits.
Along with mechanical action, chemical processes play an important role in polishing. The surface of the metal is covered with thin, invisible oxide or salt films under the influence of the environment and the chemically active substances contained in the polishing pastes. When polishing, the film is removed, but on the exposed areas of the metal it is formed again. The hardness of abrasive grains during polishing is not as important as during grinding, since in the first case the abrasive removes a thin film that is less durable than metal.
In the process of manufacturing parts by mechanical polishing, traces of processing in the form of small irregularities remain on their surface. The magnitude of these microroughness’s determines the surface finish of the parts. This characteristic has a great influence on the quality of the finish and the performance properties of the products. The smoother the metal surface, the better it resists corrosion.
Improving the surface finish increases the wear resistance of the parts. Obtaining shiny surfaces is also associated with the need to remove microroughness.
It has been determined that the cleanliness of the surface treatment of parts before electroplating is determined by their purpose and type of coating. Surface cleanliness depends on how the parts are prepared before electroplating. Polishing products with a lower initial surface finish significantly increases the processing time, which reduces the productivity of the equipment.
It has been established that electrochemical and chemical polishing have several advantages over mechanical polishing. They do not require the physical effort of the worker, which reduces the complexity of finishing operations. Many products of various shapes and sizes can be processed simultaneously, which is not feasible when polishing with circles.
Electrochemical polishing has become more widespread in industry. With its help, a greater smoothing and more intense gloss of the metal surface is achieved than with chemical polishing. The use of this process in preparation for electroplating reduces the number of operations and transitions and improves product quality by increasing the adhesion strength of the coating to the base metal.
Keywords: Machining, surface finish, electropolishing, electrolyte, roughness, adhesive strength, iron precipitation, iron plating.
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Category: Uncategorised
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Published: Wednesday, 19 April 2023 17:09
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Written by Administrator
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Hits: 1925
Volume 14 (2), April 2023, Pages 117-125
Ali-Hikmat Ahmadov1, Samir Abbasov2
1Associate Professor, Candidate of Technical Sciences, Azerbaijan State Oil and Industry University, Azerbaijan. E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.. This email address is being protected from spambots. You need JavaScript enabled to view it.@This email address is being protected from spambots. You need JavaScript enabled to view it.. This email address is being protected from spambots. You need JavaScript enabled to view it.. This email address is being protected from spambots. You need JavaScript enabled to view it.
2Master, Azerbaijan State Oil and Industry University, Azerbaijan. E-mail: Samir.a-ov00@This email address is being protected from spambots. You need JavaScript enabled to view it..This email address is being protected from spambots. You need JavaScript enabled to view it.
ABSTRACT
A hydraulic drive is a set of interacting hydraulic devices that is designed to be ghosted by means of a working fluid under pressure. The main element in hydraulic drives most machines is a power hydraulic cylinder. Hydraulic cylinder refers to volumetric hydraulic devices, since their operating mode is to fill the volume of the working chamber and empty it. The very principle of operation of the hydraulic cylinder is based on the movement of the worker organ (piston, membrane, plunger), under the influence of the energy of the flow fluid or the mechanical energy of external forces (gravity, spring). Depending on the principle of operation of hydraulic cylinders, it can be divided into two groups: one-way hydraulic cylinder, two-acting hydraulic cylinders. To ensure the operation of the hydraulic cylinder, a pump is required, the purpose of which is to convert mechanical energy into the energy of the flow fluid. Studying the stiffness of a hydraulic cylinder can help determine the optimal load that a hydraulic cylinder can withstand, as well as help in choosing the right size of hydraulic cylinder for a particular system. The stiffness of the hydraulic cylinder can be determined by measuring the movement of the hydraulic cylinder as the load increases in a given range. For example, a hydraulic press can be used to increase the load on a hydraulic cylinder to a certain value, and then a measuring tool can be used to determine the movement of the hydraulic cylinder. This data can be recorded on a computer, which can then be used to analyze and calculate the stiffness of the hydraulic cylinder. The stiffness of the hydraulic cylinder can be expressed in newtons per millimeter or other units depending on the specific measurement system. By using various materials (indicated in the literature), the results of studies aimed at determining the reduced volumetric stiffness of high-pressure hoses and the dependence of the reduced volumetric stiffness of the hydraulic cylinder on the change in the volumes of the working cavities in the process of moving its rod are given.
Keywords: hydraulic system, volumetric stiffness, hydraulic cylinder, module, hydromechanical systems, hoses, pressure, rod, dynamics.