Founder is the federal State budgetary
Educational Institution Higher Professional
Education "Bryansk State Technical University"
Chairman of Editorial Council – O.N. Fedonin, D.Eng., Prof.
Vice-Chairman of Editorial Council – E.A. Pamfilov, D.Eng., Prof
A.A. Abramov, D.Eng., Prof., (Moscow)
V.I. Averchenkov, D.Eng., Prof., (Bryansk)
E.V. Ageev, D.Eng., Prof., (Kursk)
A.Yu. Albagachiev, D.Eng., Prof., (Moscow)
V.Yu. Antsev, D.Eng., Prof., (Tula)
A.P. Babichev, D.Eng., Prof., (Rostov-upon-Don)
V.F. Bezyazychny, D.Eng., Prof., (Rybinsk)
A. Bukhach, D.Eng., Prof., (Poland)
I. A. Buyanovsky, D.Eng., Prof., (Moscow)
L.G. Vainer, D.Eng., Assistant Prof., (Khabarovsk)
G.M. Volokhov, D.Eng., Prof., (Kolomna)
S.V. Davydov, D.Eng., Prof., (Bryansk)
A. A. D’yakonov , D.Eng., Prof., (Chelyabinsk)
A.G. Ivakhnenko, D.Eng., Prof., (Kursk)
S.A. Klimenko, D.Eng., Prof., (Ukraine)
V.V.Kobishchanov, D.Eng., Prof., (Bryansk)
I.S. Konstantinov, D.Eng., Prof., (Belgorod)
A.S. Kosmodamianskiy, D.Eng., Prof., (Moscow)
K.V. Makarenko, D.Eng., Prof., (Bryansk)
B.Ya. Mokritsky, D.Eng., Prof., (Komsomolsk-upon Amur)
A. Pester, D.Eng., Prof., (Austria)
D.I. Petreshin, D.Eng., Prof., (Bryansk)
V.B. Protasiev, D.Eng., Prof., (Tula)
L.A. Savin, D.Eng., Prof., (Orel)
V.P. Smolentsev, D.Eng., Prof., (Voronezh)
D.L. Solovyov, D.Eng., Prof., (Murom)
Yu.S. Stepanov, D.Eng., Prof., (Orel)
A.G. Suslov, D.Eng., Prof., (Bryansk)
A.V. Khandozhko, D.Eng., Prof., (Bryansk)
M.L. Kheifits, D.Eng., Prof., (Belarus)
S.N. Khimukhin, D.Eng., Prof., (Khabarovsk )
A.S. Yanyushkin, D.Eng., Prof., (Bratsk)
A.V. Kirichek, D.Eng., Prof.
A.V. Morozova, Can.Sociol. Sc.
V.A. Tatarintsev, Can.Eng.
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The subscription index of catalogue
“Russia press” - 18945 semi-annual,
15621 – annual.
It is issued in February 2004.
6 numbers a year
Engineering thought of Russia: persons, ideas, developments
PROFESSOR E.V. RYZHOV’S LIFE AND CREATIVITY
Basic biographical data and results of the scien-tific activities of Professor Eduard V. Ryzhov, Dr. Sc. Tech., who had a considerable contribution to science and practice of an engineering technique are stated.
From 1970 to 1979 Prof. E. Ryzhov worked as Vice-rector for Scientific Work and then as Rector of the Bryansk Transport Engineering Institute (now FSBEI of HE “Bryansk State Technical University”). From 1979 to 1997 he worked in the Institute of Super-hard materials (Kiev, the Ukraine) as Deputy-Director for Scientific Work, Head of the Dep. “Quality Tech-nological Control of Surface Machining”.
Prof. E.V. Ryzhov is well-known as an out-standing scientist in the following fields of science and practice of an engineering technique:
- The study of contact rigidity in joints, fatigue strength, wear-resistance and other machine operation properties.
- The development of methods for the quality assessment of parts surface at different technologies of their manufacturing.
- The development of advanced methods of working surfaces finishing and strengthening treat-ments in parts (diamond-abrasive, electro-mechanical, magnetoabrasive, non-abrasive anti-friction finishing, surface plastic deformation (SPD), thread rolling and so on).
- The study of technological heredity impact upon surface quality and machinery operation proper-ties.
Key words: Eduard Vyacheslavovich Ryzhov, biographical data, contribution to science, mechanical engineering
Mechanical engineering and engineering science
DEVELOPMENT OF DOCTRINE ON CONTACT STIFFNESS
AND ENGINEERING OF MACHINERY SURFACE
TThe stages of the development of the doctrine on contact stiffness and machinery surface engineering have been analyzed. References are given to the papers of the Soviet and Russian scientists in the development of this doctrine. The descriptions of the processes of machinery discrete contacting are shown. The quality parameters of a surface layer used in different time periods are presented
Key words: contact rigidity, surface quality, roughness parameters, dimensionless complexes
A.O. Gorlenko, M.Yu. Shevtsov.
MACHINERY WEAR-RESISTANCE INCREASE BY COMBINED
The purpose of the work consists in the wear-resistance increase in machinery friction surfaces through material implanting on the basis of tungsten carbide providing obtaining modified surface layers having improved physical and stress-strain properties comparing with wear-resistant coatings obtained in common ways of machining. The application of the technology of combined electro-mechanical treatment with material implantation on the basis of tungsten carbide is possible at engineering enterprises, enterprises of automobile industry, aerospace and defense industry as a high-performance method to ensure and increase machinery operation properties at the stage of their manufacturing.
The application of this processing technique of parts working under conditions of fretting-corrosion, boundary lubrication, and also where relative micro-displacements caused by vibration and shock loads application is efficient. It allows increasing life of parts and units used in machines in the course of operation.
During electro-mechanical processing a strengthening effect is obtained due to high speeds of heating and cooling realization and a high degree of austenite grain fineness which stipulates for fine-crystal structures at hardening a surface layer having high physical and stress-strain properties.
Key words: surface layer, wear-resistance, electro-machining, strengthening, tungsten carbide, surface quality, tribological tests
V.V. Burykin, A.G. Naidenko.
SURFACE LAYER ROUGHNESS IN OPTICAL PRODUCTS
AFTER DIAMOND MICRO-TURNING
Special peculiarities, conditions and fields of the diamond turning application, machine equipment characteristics and geometrical parameters of diamond single-crystal cutters are analyzed. The parameter assessment problems of metal-optical surface micro-geometry after diamond turning are studied. A proce-dure is developed for the control of roughness geomet-rical parameters in the surface layer of aluminum mir-rors with the aid of an optical profilometer with the use of a contactless method for obtaining topography of the surface in a 3D format which allows recording the peculiarities of the relief from a nano-meter to millimeter height and obtaining their high resolution images.
The investigation results indicate that machin-ing quality maximum can be achieved only in that case when a thick value of a layer removed is close to the value of the chamfering radius of a tool tip. Under such conditions in the area adjoining directly to a tool tip an area occurs with extremely high hydro-static stresses stipulating for a brittle material transfer into a spastic state.
As a result of the investigations carried out there is achieved a purpose and recommendations are developed for the control of diamond micro-turning modes ensuring quality increase in a surface layer of metal-optical products
Key words: diamond micro-turning, diamond cutter, surface roughness, optical products
S.A. Klimenko, Yu.A. Melnichuk.
ROUGHNESS OF PARTS SURFACES WITH SPUTTERED AMORPHOUS
CRYSTALLINE COATINGS IRON BASED WORKED BY TOOLS WITH PSCBN
The assessment of potentialities for turning with a tool equipped with poly-crystalline super-hard com-posite based on cubic boron nitride (PSCBN) to ensure roughness of the surface worked in products with gas-thermal sputtered coatings and with an amorphous-crystalline structure is carried out.
There was used a fractal analysis of the stress-strain properties Ds totality of the surface layer in coat-ings, turning with a tool equipped with poly-crystalline super-hard “Cyboride” composite, profilometry.
It is defined that with the growth of the value Ds of the surface layer in coatings a height of micro-roughness changes considerably and the decrease of parameter cutting mode impact upon roughness of the surface worked is observed. The coating structure het-erogeneity exerts basic influence upon roughness of the surface which is formed at machining. It is shown that on the basis of the value of a fractal dimensionality of the stress-strain properties totality Ds of a coating sur-face layer one can predict the values of height parame-ters of roughness in product surfaces after turning
Key words: gas-thermal sputtering, amorphous-crystalline coatings, fractal dimensionality, surface roughness
S.An. Klimenko, M.Yu. Kopeikina, A.S. Manovitsky .
TOPOHRAPHY AND AREA OF WORN CYBORG END FLANK
AT HARDENED STEEL ShH15 FINISH TURNING
The paper reports the consideration of special properties, conditions and regularities of cyborg cutter wear with the formation of the end-flank micro-relief regular enough. The assessment problems of micro-geometry parameters of a worn surface in a cyborg cutter at hardened steel ShH15 turning are analyzed. There is offered a design method for the assessment of an actual area of a wear surface depending on the total length of a major cutting edge and a minor cutting one, a wear face height on an end flank and a measured average angle of slope in micro-relief cavity walls. As a result of the investigations carried out there is achieved an aim and regularities are formalized of wear surface formation in a cyborg cutter, the assessment of an actual area of a contact surface in a worn cutter with a surface under processing of a hardened part is carried out
Key words: cyborg cutters, cyborg, wear regularities, design method, actual area, end flank, tool tips, micro-relief
V.I. Sakalo, A.A. Olshevsky.
FINITE ELEMENT MODEL USE FOR SOLUTION OF CONTACT PROBLEMS TAKING INTO ACCOUNT ROUGHNESS OF SOLID SURFACES
The procedure is stated for the solution of con-tact problems for machinery taking into account con-tacting surfaces machinery macro-geometry and micro-geometry with the use of basic finite element models. For measurement and geometric parameters computations of surfaces characterizing roughness there is used measuring-information system MIS-1. A structure of a transition layer basic element ensuring the increase of finite elements amount in one transition area in the direction of a contact surface by 9 times is developed. The example of the contact problem solution for solids with rough surfaces is shown
Key words: contact problems, parts macro-geometry, contact surface micro-geometry, geometrical parameters of roughness, finite element analysis
E.A. Pamfilov, G.A. Pilyushina, V.V. Kapustin.
FUNDAMENTALS OF IRON-CARBON ALLOY WEAR-RESISTANCE IN-CREASE AT CORROSION-MECHANICAL WEAR
Iron-carbon alloy wear intensity at the interac-tion with wood is caused mainly by the conditions of electro-chemical and chemical reactions in the area of a friction contact, hydrogenation and decarbonization of surface layers, by atmospheric and biological metal corrosion development. At that structural material sur-face destruction at friction with wood takes place at the expense of the joint and interrelated realization of chemical and mechanical mechanisms.
The analysis of the contact interaction of parts operating surfaces with the wood processed allowed revealing the totality of basic factors defining their resistance to wear both at the expense of corrosion process realization, and owing to a mechanical surface destruction.
To achieve the increased wear-resistance of iron-carbon alloys contacting with wood material it is necessary to ensure the formation of favorable physi-cal-mechanical characteristics in a surface layer: hard-ness, impact elasticity, resistance to micro-crack growth, durability to the impact of abrasive corrosive-active environment.
For metal tribo-corrosion prevention the most promising way is strengthening by means of function-directed complex impacts upon surface layers or by volume and surface alloying.
The decrease of stress concentrator quantity and micro-crack growth inhibition may be achieved by the formation of ductile strata between separate areas and also by the possibility to form a favorable level of compressing residual stresses
Key words: wear-resistance, iron-carbon alloys, corrosion, wear, friction, operating surfaces, strengthening
COG-WHEEL GRINDING WITH ABRASIVE CUBIC BORON NITRIDE DISKS
The research objective was cog-wheel grinding effectiveness increase with the use of abrasive disks made of cubic boron nitride (CBN).
Cog-wheels were ground on a special bench cre-ated on the basis of a gear-grinding machine of model 5891. CBN disks were compared with white electroco-rundum disks and chromium electrocorundum ones to determine their working capacity.
The working capacity of CBN disks was as-sessed according to grinding capacity, roughness of a surface worked, accuracy of involute tooth and disk wear.
The analysis of the results has shown that the working capacity of cog-wheel grinding at machining with CBN disks is twice lower as compared with white electrocorundum disks and 1.5 times lower as com-pared with chromium electrocorundum. During grind-ing with CBN disks teeth roughness increases in com-parison with electrocorundum disks.
It is defined that after disk accelerated wear in the course of the first pass the value of wear intensity is further stabilized.
The analysis of experiments carried out has shown that a limiting parameter of the accuracy of cog-wheel machining is dimensional wear of a plated disk which is proportional to the number of teeth machined without dressing.
It is also determined that during grinding after the first pass there is formed a wear area h=30-50µm upon a disk cutting edge which corresponds approxi-mately to run-in wear.
Key words: grinding, cog-wheels, plate disks, cubic boron nitride
A.V. Kirichek, S.V. Barinov, A.V. Yashin.
MODELING OF WAVE DEFORMATION LOADING OF ALUMINUM-MAGNESIUM ALLOYS
The investigations under carrying out deal with the definition of the efficient technological parameters (impact energy, form and dimensions of a tool) of the process of AMr-alloys deformation wave strengthening with the use of an end-element analysis. The investiga-tions were carried out in ANSYS/LS-DYNA program module. The assessment of modeling adequacy is per-formed. It is defined that the discrepancy of experi-mental and rated values makes 7.9%.
As a result it is defined that depending on the dimensions of the area to be strengthened as a tool it is possible to use efficiently both the balls, and cylindrical indenters with spherical ends. Balls with diameter from 12mm to 27mm are efficient at the dimensions of a part above 100mm, at smaller dimensions of a part or at the necessity of a local treatment the application of cylindrical indenters with the diameter of a sphere in the end from 19mm to 27mm is substantiated. The blow energy from 30 to 50J ensures strengthening depth for 6-7mm and a maximum degree of strengthening up to 80%. The application of big energy of strengthening decreases considerably material plasticity and results in premature destruction of a part.
Key words: deformation wave, loading, indenter, blow energy, end element modeling
I.G. Goryacheva, I.Yu. Tsukanov.
ELASTIC CONTACT MODELING OF SOLIDS WITH STANDARD MICRORELIEF
In the paper there are considered results of con-tact problems modeling an elastic contact of surfaces one of which has a microrelief and the second has low Young module. Two different kinds of a micro-relief are considered:
a spatial system of spherical projections with an equal radius and a height and a two-dimensional peri-odic micro-relief of the surface with an arbitrary shape presented by Fourier even series. Analytical depend-ences allowing the computation of an actual area (length) of a contact and surfaces displacement are presented. The comparison of the results with precise numerical calculations and Hertz theory is shown. A contact rigidity increases for the spatial system of spherical projections with rated pressure increase and, hence, with the increase actual contact area. With the distance decrease between irregularities the micro-relief contact rigidity increases considerably. For the two-dimensional periodic micro-relief with the amplitude increase at the same contact half-length a rated pressure increases and surfaces displacement decreas-es. A period increase results in an opposite result. With the decrease of the tangent angle to the profile a con-tact length decreases and surfaces displacement in-creases at rated pressure increase
Key words: micro-relief, periodical contact problem, Hertz theory, contact rigidity, actual contact area
A.A. Obozov, R.A. Novikov.
CURRENT TRENDS IN DEVELOPMENT OF SYSTEMS FOR DIESEL ENGINE CONTROL
The paper reports the basic functional potenti-alities of modern electronic systems for diesel engines control and directions for their updating. This infor-mation is considered to be urgent enough as electronic control systems are certainly referred to the number of the most efficient means for the improvement of eco-logical and economic characteristics of internal com-bustion engines. In the paper there is presented a com-position, purpose and operation principles of the basic parts in the systems of engine electronic control. An attempt is undertaken to describe generally a state and trends in the development of these systems. There are shown effects formed in engines with the aid of use unique potentialities of electronic control systems
Key words: diesel engine, electronic systems of control, fuel equipment, sensors
Informatics, computer engineering and management
ENGINEERING COMPLEX STATE MONITORING OF BELARUS REPUBLIC
HThe engineering complex of the Belarus Repub-lic is one the key sectors in manufacturing industry and includes production of machinery, equipment, transport means, and electrical equipment. The problem of the efficient operation of the engineering complex and all manufacturing industry has got a particular topicality in view of the need appeared in the competitive increase of produce of the Belarus Republic. It makes to be essential the development of the program of social-economic development of industry at the state level to increase industry effectiveness. To achieve the planned values and prompt updating of management decision-makings it is necessary to carry out grouped key parameters monitoring. Each group is presented as a totality of basic values characterizing economic activity direc-tions most completely and manifesting the results of engineering complex activities of the Belarus Republic within the limits of the period under consideration.
The monitoring results allow affecting precisely the presented directions of the activities of engineering companies with the purpose of their further develop-ment and effectiveness increase
Key words: monitoring, engineering complex, finances, material and technical basis, innovation activity, production and marketing activity