Power Parameters of Micro-cutting During Finishing Anti-friction Non-abrasive Treatment

Shepelenko, Ihor; Nemyrovskyi, Yakiv; Tsekhanov, Yuri; Posviatenko, Eduard; Sardak, Sergii

doi:10.1007/978-3-030-46817-0_22

Cited by 4 publications

(3 citation statements)

References 1 publication

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“…As noted in [16], the quality of the coating obtained by finishing antifriction non-abrasive treatment (FANT) mainly depends on the triggering of the following channels of contact surfaces activation: mechanical, chemical, thermal and vacancy-dislocation. At the same time, the authors of [17,18] substantiated the feasibility of forming favorable shapes and sizes of microroughness in previous FANT operations, for example, creating a regular microrelief by turning as one of the conditions for obtaining a quality coating.…”

Section: Resultsmentioning

confidence: 93%

Creation of new technological methods for surface engineering based on broaching

Shepelenko

Posviatenko

Nemyrovskyi

et al. 2022

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The article is devoted to the creation of new processing technologies through the use of drawing. It is determined that the most effective processes of surface engineering of machine parts are hybrid technologies. The advantages of such technologies due to obtaining a new effect from the impact on the part by two or more dissimilar processes belonging to one or different groups of surface engineering methods are noted. It is proved that the use of hybrid technologies on the basis of stretching allows to combine the advantages of different methods, first of all cold plastic deformation methods, in combination with others. The use of deforming drawing provides in the surface layer favorable for the part of the compressive residual stresses, increase the wear resistance of the surface, as well as the strength of the part. The results of the research allowed to classify the deforming drawing as a class of surface engineering methods. On the example of processing of cylinder liners of internal combustion engines the combined technology containing operations of deforming drawing and finishing antifrictional non-abrasive processing is developed. It is shown that the use of deforming drawing has significantly improved the quality of antifriction coating. The use of deforming drawing to the component of the hybrid method with the subsequent pulsed nitriding is considered.It is established that when nitriding cutting tool products, hybrid process modes should be set in order to create the most effective nitride zone. In the case of processing of road vehicle parts, special attention should be paid to obtaining a diffusion layer. The efficiency of the offered technologies on the basis of stretching is established. Determining the prospects for further use of deforming drawing as an integral part of hybrid technologies

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Section: Resultsmentioning

confidence: 93%

Creation of new technological methods for surface engineering based on broaching

Shepelenko

Posviatenko

Nemyrovskyi

et al. 2022

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“…The process of contact interaction of the surface of the workpiece with rubbed material can be divided into two stages: 1) micro cutting of the starting material with the tips of microprotrusions; 2) adhesive adherence and seizure of particles formed as a result of micro-cutting with the surface onto which transfer and subsequent micro-smoothing takes place. In [12], the FANT process was studied at the stage of micro cutting and the role of the latter in the formation of a highquality antifriction coating. It was established that in order to intensify the FANT process due to micro-cutting, it is necessary to create a regular microrelief of a rough surface with a front cutting angle γ ≥ 0°, and the angle γ = 5° is the best option.…”

Section: Fig 9 the Calculated Expansion Schemementioning

confidence: 99%

Creation of progressive hole processing processes based on the study of contact phenomena during deforming broaching and finishing antifriction non-abrasive treatment in various technological environments

Nemyrovskyi,

Shepelenko,

Posviatenko

et al. 2022

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This work is devoted to the creation of progressive technological processes for processing holes. The relevance of studying this issue is substantiated, technological environments (TE) used in these operations are listed. The purpose of the work performed is to study the influence of TE on contact phenomena and quality parameters of the treated surface during deformation broaching (DB) and finishing antifriction non-abrasive processing (FANT) and the creation on this basis of new technological processes to obtain parts with improved performance. New methods have been developed for studying contact interaction in the case of DB using solid lubricants, as well as for modeling the FANT process. The conditions for the use of liquid lubricants in the DB are described. It has been established that, when them applied, the altitudinal roughness parameters decrease and the surface layer hardens to a considerable depth. It is shown that the use of solid lubricants in DB is mandatory when processing products from hard-to-work materials and alloys. When them applied, significant plastic deformations of the hole can be made. In this case, the surface layer of the workpiece is little different from the original. The change in the altitude parameters of the rough layer, as well as contact pressures using solid lubricants, was studied. Peculiarities of contact phenomena in the case of DB using solid lubricants are revealed. For this case, a functional relationship has been established between the altitude parameters of roughness and the relative contact pressure. An analytical dependence is proposed for their calculation. The boundary conditions for its application are determined. Formation FANT also occurs when using the TE. It was established that solid lubricants during FANT perform a dual function, namely, technological, like solid lubricant during processing, and operational - improve the quality parameters of the processed parts. The combination of DB and FANT operations allows us to develop a new technological process for processing holes of parts such as bushings and sleeves. This process consists in the use of DB as a roughing and finishing operations, and FANT as a finishing operation, which allows to improve the quality indicators of the machined part

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“…Експерименти проводилися при навантаженні P = 38 Н. Нанесення антифрикційного покриття фрикційно-механічним методом виконувалося латунним інструментом прямокутної форми розмірами l × b = 6 × 3. Методика і обладнання для проведення експериментів наведена в [15].…”

Section: методика проведення дослідженьunclassified

Improving the quality of antifriction coatings using plastic deformation

Shepelenko¹,

Nemyrovskyi²,

Posviatenko³

2022

Mech. Adv. Technol.

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One of the ways to solve the shortage of anti-friction materials based on copper is the creation of anti-friction coatings on the surface of parts made from domestic raw materials. The technology of applying anti-friction coatings by finishing anti-friction non-abrasive treatment on the working surfaces of cast-iron products is considered. The use of deforming broaching to improve the quality of the antifriction coating is proposed. The reserves for their improvement due to the creation of favorable shapes and sizes of microroughnesses in the operations preceding the coating are determined. The study of the contact interaction of the microroughness of the machined surface with the tool was carried out on model samples. The main regularities of the formation of an antifriction coating on a cast-iron surface are established depending on the initial microrelief and processing modes. The effectiveness of the use of deforming broaching when applying an antifriction coating is studied by changing the height parameter of roughness. The performed studies allowed us to propose various schemes of the technological process of applying anti-friction coatings by the friction-mechanical method using deforming broaching, depending on the technical requirements for the product.

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Power Parameters of Micro-cutting During Finishing Anti-friction Non-abrasive Treatment

Cited by 4 publications

References 1 publication

Creation of new technological methods for surface engineering based on broaching

Creation of new technological methods for surface engineering based on broaching

Creation of progressive hole processing processes based on the study of contact phenomena during deforming broaching and finishing antifriction non-abrasive treatment in various technological environments

Improving the quality of antifriction coatings using plastic deformation

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