bluuebunny/crossref_metadata_2025_split huggingface dataset:
Extended object model for grinding operation
Authors: Vladetskaya E A 
Published: January 2020

Abstract
The article discusses the issues of building a dynamic model of a flat grinding operation, taking into account the statistical characteristics of the disturbances. Deviations of the shape of the grinding wheel in a static mode are random in nature and, when analyzing the processing process, can be taken into account by introducing an additional link into the system - the corresponding shaping filter. Such a filter can be built on the basis of profile analysis for any particular grinding wheel with a representation of the effect on the system in the state space as equations of state and observation. On the basis of the developed model for grinding operations in floating workshops, it is possible to use high-precision CNC machines equipped with adaptive control systems based on optimal systems with a stochastic process controller.
Prediction trajectory of the fracture crack using the photoelasticity method
Authors: Shron L B , Bogutski V B , Tabolin I S , Yagyayev E E 
Published: January 2020

Abstract
This paper proposes a method for projecting the propagation of a fillet-weld fracture. The model is based on photoelasticity testing of stress-strain state combined with destructive testing the fracturing resistance of fillet welds. The paper identifies the correlation of weld geometry and stress concentration/gradients. It shows that reconfiguring the flat body and/or reorienting the resultant external-load vector disrupts the symmetry in general, including the stress tensor field in the vicinity of the fracture apex. To project fracture propagation, this research uses differential geometry, in particular the properties of geodesic lines and gradient descent.
Monitoring of dynamic processes in the machining of parts with vibrations
Authors: Levchenko Elena , Pokintelitsa Nikolay 
Published: January 2020

Abstract
There are the results of theoretical researches for the control of dynamics of the part motion in machining of parts with vibrations, based on the use of a group of magnetic modulation sensors, allowing to measure the nature of changes and motion of the part, as well as the amplitude, frequency and acceleration of motion during machining.
Thermophysical processes in thermofriction working of surfaces
Authors: Pokintelitsa Nikolay , Levchenko Elena 
Published: January 2020

Abstract
There are results of thermophysical processes of thermofrictional working of details by the disk tool. Results of mathematical modeling of heat distribution in a processing zone at thermofrictional working of details are presented. It is found that the size of Q2 heat quantity going to the cutting disk in unit of time has the considerable impact on firmness of a disk, and the quantity of Q2 heat cutting going to the cutting disk under various conditions can make up to 50-60% of all warmth of cutting.
Assessment of the actual depth of cutting with cylindrical external grinding
Authors: Roshchupkin S I , Sidorov D E , Kolesov A G 
Published: January 2020

Abstract
Article presents the correlations that make it possible to use the results of measurements of coordinates in the process of machining a part in order to build estimates of the actual depth of cut while machining the part. Such estimates are optimal assuming the gaussianity of the noise of measurements and excitations, and can be used directly to solve process control problems.
Assessment of climatic processability of polymeric materials used in the repair of machines in the Arctic
Authors: Konoplin Alexander , Baurova Natalia , Abrakov Sergei 
Published: January 2020

Abstract
The results of studies of the properties of polymer composite materials that can be used in the repair of machines under conditions of constant, prolonged exposure to negative temperatures (Arctic conditions) are presented. The main indicators of technological effectiveness in the repair of machines under conditions of constant exposure to negative temperatures using polymer composite materials are evaluated. The qualitative and quantitative indicators of the technological effectiveness of polymer composite materials used in the repair of machines are also evaluated. To assess the technological effectiveness of repair materials, a qualitative criteria is suggested - an integral coefficient that takes into account the errors in the performance of each technological operation.
Development of adaptive anti-slipping spike for vehicle tires
Authors: Voiku I P , Sergeeva T V , Maltsev P N , Strikunov A V 
Published: January 2020

Abstract
The article describes the purpose of anti-slipping spikes, which are set into tire treads of vehicles. The advantages and disadvantages of using anti-slipping spikes are revealed. The assessment of the destructive effect of the use of anti-slipping spikes on the road surface is given. The inability to simultaneously solve the problems to ensure maximum adhesion of the vehicle’s wheel to the road surface and to minimize the destructive effect of anti-slipping spikes on this surface actualize the development of an adaptive anti-slipping spike. Unlike traditional anti-slipping spikes, the pin of the designed device is retractable. The article presents the variants of the design of the developed adaptive anti-slipping spike for vehicle tires.
Constructive solutions for upgrading of the drive of processing equipment
Authors: Bardovsky A D , Gerasimova A A , Basyrov I I 
Published: January 2020

Abstract
This paper presents the results of studies to assess the efficient use of the equipment with flexible thrust coupling used as working bodies. Such mechanisms are known as wave mechanisms, where the transformation of motion is carried out due to the deformation of the flexible link. A number of constructive diagrams of wave gears and the kinematics of the movement of their working bodies were analyzed in the work. On the basis of an asymmetric diagram of the motion law of flexible coupling, the basic design of an inertial conveyor with a spring tab has been developed by equation.
Determination of temperature conditions for steel plate rolling at Vyksa Steel Works (AO VMZ)
Authors: Gerasimova A , Mishedchenko O , Devyatiarova V 
Published: January 2020

Abstract
This article describes the working process of OMK Heavy Plate Mill 5000. Based on the fabricator's facilities capability, the technological production flow diagram of thick steel sheets of K60 (X 70) grades, for cold-working large diameter pipes has been developed. As the initial blank authors used a 310×2.100×3.170 mm plate slab. The controlled rolling process, described in the article, consists of two stages –roughing-down (when deformation and re-crystallization results in obtaining fine uniform austenite grains) and finishing rolling (when austenite is hammer-hardened and converted into fine-grain ferrite). As a result of the research has been selected and the optimal temperature conditions for rolling in the passes, which would reduce the waste of metal in furnace.
Investigation and prediction of adhesion strength of plasma coatings by mathematical modeling of deposition parameters
Authors: Zhachkin S Yu , Trifonov G I , Pen’kov N A 
Published: January 2020

Abstract
In this paper, studies were conducted in the field of adhesive strength of plasma coatings and the surface of the part. The propagation of a crack front in a plasma coating material with composite inclusions is simulated. It was proposed to consider the possibility of introducing into the composition of the material sputtering additional composite inclusions that have a greater plasticity and a size greater than the size of the particles in the coating.
The increased stability of a coarse-grained and ultrafine-grained Ti49.15Ni50.85 shape memory alloy achieved with multiple martensitic transformations
Authors: Churakova A A , Gunderov D V 
Published: January 2020

Abstract
The influence of thermal cycling in the temperature range of B2-B19’ martensitic transformations on the TiNi alloy structure and properties are studied. The level of properties, obtained as a result of mechanical tests and measurements of microhardness, obtained in the process of thermal cycling, remains stable during soaking at room temperature in the TiNi alloy.
Numerical modeling of heat transfer at cooling a high-temperature steel cylinder by the flow of a water-air medium with account taken of the gamma - alpha transformation
Authors: Makarov S S , Lipanov A M , Makhneva T M , Makarova E V 
Published: January 2020

Abstract
Based on the mathematical model of the conjugate heat transfer from a steel cylinder to a water-air medium, the results of the calculation of the cooling rate and the mass fraction of the α-phase in supercooled austenite during the γ → α transformation are obtained. To find the mass fraction of the α-phase in austenite during supercooling, a modified Kolmogorov – Johnson – Mel – Avrami equation is used. The calculation results have been obtained during the cooling of the high-temperature metal cylinder by the laminar gas-liquid flow in an annular channel with account taken of vaporization in the liquid. The regulation of the heat and mass transfer balance of the system during the vaporization is based on the energy model of the heat balance and is performed using the effective thermophysical parameters of the cooling medium. The mathematical model is presented in a two-dimensional non-stationary formulation taking into account the symmetry of the cooling medium flow relative to the longitudinal vertical axis of the cylinder. To solve the system of differential equations, the control volume method is used. The parameters of the cooling medium flow are calculated using an algorithm SIMPLE. For the iterative solution of the system of linear algebraic equations, the methods of Gauss-Seidel and under-relaxation are used. The calculations, are carried out using a grid with a condensing profile at the «metal cylinder – liquid» and «liquid - outer metal ring» boundaries on the liquid side and the metal side.
Increase of grinding wheel durability
Authors: Korotkov Aleksandr , Korotkov Vitaliy 
Published: January 2020

Abstract
The durability of grinding wheels on epoxy resin and bakelite bond reinforced with fiberglass and carbon fiber meshes was investigated. The durability of wheels was evaluated by means of their destruction due to the action of centrifugal forces during rotation in the test armored chamber. It was discovered that the speed of destruction of carbon reinforced wheels is 30% higher than the speed of destruction of fiberglass reinforced wheels. This kind of increase in the durability of the wheels allows to increase their maximum working speed, reduce tool wear, increase processing productivity, reduce roughness of the machined surfaces and the temperature during grinding.
The Resistance of a Single Protrusion at a constant current
Authors: Lyuminarskaja E S , Lyuminarsky S E , Lyuminarsky I E 
Published: January 2020

Abstract
The article deals with a method for measuring resistance of a single spherical asperity. There is obtained an approximate analytical relation between the electrical resistance of a single bump constriction and the contact spot radius, conductor radius, asperity height and width. Electrical resistance is determined from the solution to the Laplace equation for electrical field potential inside a conductor. The calculations are made using the finite-element method.
To determination of removable material during grinding with flap wheels after shot peen forming
Authors: Koltsov V P , Vinh Le Tri , Rakitskaya V B 
Published: January 2020

Abstract
Shot peening are widely used in forming the long panels and sheaths. Due to impact of shot on the processed surface, the specific microgeometry is formed, the characteristic feature of this microgeometry are the numerous dimples of shot with different diameters and depths. The presence of these dimples causes deterioration of the surface roughness parameters. Therefore, after shot peening the mandatory requirement is implementation of grinding with flap wheels for partial removal of the shot dimples, the depth of which in magnitude significantly exceeds the valleys of micro-irregularities formed as a result of previous treatment. The value of the assigned allowance for grinding depends on the requirements for the quality of the surface of the part. As a result of grinding on the treated surface, a new microrelief is formed in the form of a combination of traces of the impact of abrasive grains of flap wheels and the remains of the dimples from shot peening. At the same time, the depth of dimples of shot after grinding is much reater than the values of valleys of the micro-surface formed as a result of impact of the grains of flap wheels. Since the dimples have a spherical shape with a much larger radius of curvature than their depth, they have a special effect on the volume of the removed metal with an increase in the size of the allowance.
Microcontroller-based electromechanical drive
Authors: Selivanov K V , Vasiliev I A , Lyuminarskaja E S 
Published: January 2020

Abstract
This paper covers design and implementation of automated electromechanical drives for solar panels. It substantiates the need for using these devices when ensuring highly efficient generation of electricity from renewable energy sources (RES) is required and when human participation in the deployment of the device is impossible. The paper also considers the possibilities of increasing the efficiency of mobile solar power stations due to their automatic positioning during deployment and tracking the motion of the Sun in the sky through automatic control by the microcontroller-based electric drive directed by the incoming signals of the maximum irradiance tracking. The results of experimental tests of the developed microcontroller-based electromechanical drive are presented.
Methodology for the development of computer-aided design of technological equipment for chemical plants
Authors: Mokrozub V G , Karpushkin S V , Malygin E N 
Published: January 2020

Abstract
Design of multi-assortment chemical production (MCP) is a difficult task, the solution of which is carried out using the decomposition of the initial problem into a number of interrelated local subtasks that form a tree of tasks. The task tree defines the structure of the object-oriented component of the computer-aided design (CAD) system. The proposed methodology for developing CAD software is based on MCP procedural design model, information models that describe the structure of information necessary to solve local subtasks, information support for storing and processing information models.
Failure risks of mine excavators in ranking control levels
Authors: Velikanov V S , Dyorina N V , Panfilova O R , Dyorina K S 
Published: January 2020

Abstract
The paper gives the analyses of various approaches to the definition of the risk concept. The theory of catastrophes is determined to use the term “risk” in order to describe accidents and natural disasters, the theory of reliability interprets this concept as the probability of failure. It is established that there is a variety of factors that are the cause of of mining excavators failures as complex technical systems. The authors propose to establish causal relationships between the occurrence of career excavator failures, for example, using the method of event trees (failure trees) or Ishikawa diagrams.
Determination of the possible causes factors of the functionality impairment of the career excavator
Authors: Velikanov V S , Dyorina N V , Panfilova O R , Zalavina T Y 
Published: January 2020

Abstract
The paper deals with the factors of the possible reasons for the deterioration of the functional characteristics of a career crawler excavator, identifying such factors as “machine - career excavator”, “personnel – excavator drivers”, “materials” and “external environment” as well as secondary causes, main aspects of these factors. The reasons for the failures of the career excavator stick in the conditions of the ore deposits of the Southern Urals are established. It is shown that the greatest number of failures is associated with excavator drivers’ low qualifications and insufficient experience.
The method for achievement of group interchangeability accuracy for multilink dimension chains with gaps
Authors: Shilyaev Sergey , Slashchev Evgeniy , Mikhaylov Yuriy 
Published: January 2020

Abstract
The article provides recurrent dependencies for determining the upper and lower deviations of the sorting groups of the component parts of a dimensional chain calculated by the group interchangeability method for tasks when the closing link is a gap. The article also substantiates the necessity of formalizing the group interchangeability method for multilink dimension chains, which are divided into groups by the equal tolerance method. Using the sorting of parts for multilink dimension chains into groups and the assembly of parts within a group by the method for complete interchangeability, the technologist provides high accuracy, productivity and economy of production. At the same time, for multilink dimension chains, a graphical method is used to calculate the upper and lower deviations of the sorting groups. In this regard, a technique is proposed for automation, which allows formalizing the procedure for determining the parameters of a dimensional chain. At the same time, the field of application of the method expands, the requirements for the designer’s qualification reduce, and subjective errors are eliminated.
Development of methodology for the purpose of the machining process mode with time-varying parameters in the face of uncertainty of technological information
Authors: Unyanin A N , Finageev P R 
Published: January 2020

Abstract
In recent years, the industry is widely used new structural materials, patterns in the processing area which are not sufficiently studied, which makes it difficult to choose a rational mode of machining, largely determines the performance and quality of parts. A rational method of mode assignment is its calculation using models (dependencies) that link the output and input parameters of the process. However, the inadequacy of the models, the ambiguity of the source data and the influence of unmanaged factors may lead to the fact that the regime calculated with their use will be far from optimal. The scientific significance of the research is to solve the problem of reducing the degree of influence of uncertainty of technological information on the process of assigning machining modes with a variety of input and output parameters. In order to reduce the error in the appointment mode under uncertainty of information for the first time developed mathematical models and algorithms that provide adjustment (correction) of the parameters of the models, linking the input and output parameters of the process, according to the current information about the output parameters. Developed a plan of varying the controllable factors of the technological process, the implementation of which controllable factors closer to the optimal level. The difference between the actual and calculated values of the output parameters of the process, which is obtained during its monitoring, is used as the initial information for model correction. On the basis of models and algorithms the software is developed and efficiency of the developed methodology at appointment and correction of a mode of turning is investigated. The method and algorithm of generation of mathematical models of machining process with time-varying parameters are developed. Models take into account the mutual influence of the tool state parameters and the current processing parameters and their impact on the output parameters and allow you to calculate the output parameters of the process at different times. This makes it possible to create prerequisites for the purpose of machining mode with time-varying parameters in the face of uncertainty of technological information.
Optimization of the technological curing modes of glass fiber reinforced composites
Authors: Chen Yangyang , Maung Pyi Phyo , Malysheva G.V. 
Published: January 2020

Abstract
The aim of this study was to optimize the curing mode of glass fiber reinforced epoxy composites. In this article, the change of the thermos-physical characteristics of epoxy binders depending on the state of aggregation of the binders during their curing is investigated. The kinetic parameters of the epoxy binders used are determined. The obtained thermos-physical and kinetic parameters were used to simulate the process of curing fiberglass. Different modes of curing for fiberglass based on epoxy binders were simulated at different heating rates. The method of optimization of the curing mode was carried out. As the result of the calculations, it was found that the optimal mode: the heating rate in the first section 2 °C/min and in the third section 3 °C/min.
Analysis of ways and methods of deformation measuring of rigid mounted axially symmetrical device elements.
Authors: Krivov A V , Trutnev G A , Shenyatski A V , Melnikov R V 
Published: January 2020

Abstract
In this article some technologies of modern devices manufacturing are reviewed which are intended to achieve the needed device accuracy. The imprecision of sensing element (SE) manufacturing and different factors influencing on it are observed too. Functioning of axially symmetric non-ideal gear under high-frequency load leads to deflection of SE axis from vertical direction which is result of unbalanced mass and moments influence. Many researches were devoted to develop some methods of this disbalance evaluation. Some of them are based on theoretical approaches to disbalance elimination, but it is impossible to make it real even on contemporary technology achievements. In other researches the procedure is sufficiently simplified but it could not reach the needed accuracy of balancing. The solutions are known which allow to evaluate the deflection of SE axis under load throughout the shift of the bar free end but such processing is made not for the final stage of manufacturing. Thus the additional structural element is in the SE design. After removing this additional element the balancing of the SE could be ruined. In this article the other method of deformations evaluation in dynamics is offered when the shift caused by non-ideal SE condition needs appropriate balancing. The rigid mounting of the SE is offered, when the base end of the bar is fixed and the other end becomes free after last technological operation. The procedure of measuring of the shifts caused by unbalancing masses and moments is made through the bar mounting place. The questions of unbalancing mass and moments influence on shifts values in the sensors balance area are studied. According to the given geometry and physical and mechanical properties of sensors the best combinations of geometry and device sizes are offered with mounting area restrictions and shifts measuring kept in mind.