The article deals with the issue of increasing durability camshaft an internal combustion engine by improving operational properties cams. It is determined that studying stress-strain state individual elements a part, it possible to solve number technological problems. Taking into account in most cases destruction part begins from its surface, surface layer has significant impact on parts. study parameters working cam was carried out modelling using finite element method. model takes design...

Different interpretations of the mechanism formation antifriction coatings by a friction-mechanical method hinders widespread use finishing non-abrasive treatment in manufacture and repair parts. It has been established that at initial stage, application an coating will be accompanied process micro-cutting material with its subsequent filling micro relief cavities form chips. The fulfillment condition is obligatory for preparation anti-friction coatings. A theoretical scheme cutting during...

This paper addresses the issues related to designing and estimating strength of solid-alloy elements in deforming broaches significant diameter (exceeding 150 mm) for developed process discrete broaching. The tool limit condition was assessed based on two criteria: specific potential energy shape change maximum tangent stresses. Numerical modeling using finite element method has made it possible derive distribution equivalent stresses contact at surface between a insert body, which enabled...

Wear is the main reason for loss of performance parts agricultural machinery. It leads to degradation soil working quality. This work aims highlight wear resistance harrows discs manufactured, consolidated and sharpened differently. The tests were conducted in laboratory field Faculty Exploitation Repair Agricultural Machinery State Technical University Kirovograd (Ukraine) 2015. technical equipment consists devices consolidation by electric discharge measurement linear discs, a harrow, sand...

In this work, the technology of 30HGSA steel ion nitriding was optimized in terms tribotechnical characteristics – wear intensity and friction coefficient. When choosing controlled factors, influence all existing groups factors that can affect process is taken into account: structural, technological operational. Friction tests were carried out under conditions are as close possible to actual operating aircraft parts made steel. As a result experiments on wear, coatings obtained depending...

An analysis of the literature on formation an antifriction coating by finishing anti-friction non-abrasive treatment showed that surface roughness can be main criterion for assessing quality applied skin. In this regard, regularities changes in layer treated with FANT have been established work. The friction-mechanical method was studied special samples gray cast iron SCh20 made form disks, and brass L63 used as material coating. Since microrelief initial significantly affects continuity...

Abstract The paper presents studies aimed at improving the quality of application antifriction coatings by finish non-abrasive treatment (FANT). It is proved that one conditions for formation a high-quality anti-friction coating targeted favorable shapes and sizes microroughnesses in operations preceding coating. effectiveness use turning when substantiating creation necessary microroughness justified. A procedure applying an friction-mechanical method proposed, which allows multiple on...

Due to the use of surface engineering methods, a combined technology for processing working internal combustion engines cylinder liners has been developed. The advantages and disadvantages traditional technologies are analyzed, which allowed identifying ways improve them. A new technological process is proposed, includes operations deforming broaching finishing antifriction non-abrasive treatment. equipment tools chosen realization chosen. Experimental studies proposed technical solutions...

This work is devoted to the creation of progressive technological processes for processing holes. The relevance studying this issue substantiated, environments (TE) used in these operations are listed. purpose performed study influence TE on contact phenomena and quality parameters treated surface during deformation broaching (DB) finishing antifriction non-abrasive (FANT) basis new obtain parts with improved performance. New methods have been developed interaction case DB using solid...

The conditions for the antifriction coatings formation during finishing non-abrasive treatment (FANT) are analyzed. requirements this kind of and main criteria assessing their quality noted. A relationship has been established between coating obtained with FANT technological factors that determine contacting tool treated surface. It is proved shape size microroughnesses surface efficiency microcutting process filling microcavities rubbed material. Technological influence on was investigated...

Abstract In the work, from standpoint of a systematic approach, methodology for technological design repair and restoration worn parts using methods to improve quality working layer is proposed. For stages product life cycle, solving problem extending service after parts, general scheme structure information support were developed that ensure layer. A variant process cylinder liners modified gray cast iron by combination surface plastic deformation (SPD) finishing antifriction non-abrasive...

In this work, a multicriteria optimization of the technology for applying discrete coatings by electrospark alloying in restoration bronze parts is carried out. As criteria optimizing process alloying, tribotechnical characteristics were chosen – wear intensity and friction coefficient coating. adjustable parameters, those design, technological operational factors that have greatest influence on value are used: coating material; lubricant; operating current; amplitude electrode oscillations;...

The paper considers the technological process of parts restoration as a system interrelated elements that can influence formation quality indicators restored parts. It is established has all necessary properties are required for systems. However, modern methods and criteria used in design recovery focus on selection optimal method, which only part process. Therefore, sets goal presenting interconnections between individual allow to purposefully main hierarchical levels defined. In turn,...

This paper presents the results of research aimed at improving quality antifriction coatings obtained by finishing non-abrasive treatment (FANT). It has been previously established that formation an coating during FANT largely depends on technological parameters determine conditions contact between tool and surface being treated. The study peculiarities contact, their regularities, as well main process, makes it possible to improve coating, therefore operational properties part. aim...

The purpose of this study is to find ways reduce production time spent on diagnostic operations during maintenance or repair electronic control systems (ECS) in automotive vehicles. Existing methods diagnosing engine vehicles are sufficiently effective, but most cases, they require highly skilled personnel, the use additional complex and expensive equipment, prolonged service cycles, which turn increases complexity maintenance, also does not provide for prior prediction faults system...