bluuebunny/crossref_metadata_2025_split huggingface dataset:
Base error for centerless grinding of spherical rolling elements
Authors: Reshetnikova O P , Iznairov B M , Vasin A N , Belousova N V , Panfilova A V 
Published: May 2020

Abstract
The article considers a method for centerless grinding of spherical blanks. The scheme is implemented due to the presence of a trapezoidal helical groove on the driving wheel. The schematic diagram of the proposed method largely corresponds to the traditional centerless grinding scheme, which allows the use of machine tools available in production. It is shown that in the case of centerless grinding of balls, there is an error of basing on the operational size, namely, the diameter of the spherical surface. The adjustment size is mathematically determined when performing the technological operation of centerless grinding of balls, as well as the error of the adjustment size.
Mathematical model for changing the surface roughness of aluminum alloys when changing the final treatment modes
Authors: Galkin M G , Smagin A S , Poupyreva A S 
Published: May 2020

Abstract
In the process of multivariate design of machining technology, one of the important tasks is the selection of optimal cutting conditions at the final transitions of the shaping process, ensuring a given surface quality on a workpiece made of the corresponding material. At the same time, to describe the majority of design procedures for the machining process, there are problems associated with the algorithm for choosing a solution method, response function, and areas of feasible solutions at all stages of processing. In this paper, as an algorithm for solving the problem, it is proposed to use the well-known technique of extreme experimental design, which allows to obtain a mathematical model of the investigated multifactor process with incomplete knowledge of its optimization mechanism. Such a study allows us to simplify the procedure for setting the processing regime of the workpiece at the final stage in the conditions of the existing production, while ensuring the specified quality of the machined surfaces and maintaining the productivity of the forming process. This technique is the subject of consideration in this work.
Improving the quality of tightened joints of metal-cutting machines
Authors: Lipov A V , Kochetkov D V , Bolshakov G S 
Published: May 2020

Abstract
Tightened joints using threaded assembly are widely used in modern metal cutting machines. Reliable operation of such joints is determined by the value of the required initial tightening and its stability during operation of the machines. It has been established that the cause of the weakening of the thread in joints is their self-loosening at significant relative lateral displacements of the fastened parts, at which the screw tilts with slipping in the thread and along the supporting surface of its head. The self-loosening in the bolted joint of the wedge adjusting devices regulating the rolling of the multi-purpose machines of the drilling-milling-boring group, loaded with an inertial load, which reduces their geometric accuracy, is considered. A model has been developed for the process of creating an interference fit and the conditions under which the screws of adjusting devices are unscrewed are determined. Measures have been developed to determine the rational parameters of screws and their tightening values, ensuring its stability during the operation of the machines.
The combination feeder of a continuous-action loader for the bulk load
Authors: Khakimzyanov Rustam R , Mashtakov Alexander P 
Published: May 2020

Abstract
The spectrum of construction, industrial, agricultural and other bulk load includes a lot of names that vary in their physical, mechanical and volume-mass characteristics. Continuous-action loaders are developed and constantly improved for bulk load shipping. Their main operating element, which is responsible for the efficiency and power consumption of the drive, is a feeder. The feeder separates or grabs the load from the surface on which the bulk load is stored. It is proposed to use a combination feeder consisting of two operating elements, that will allow to grab the load and transport it simultaneously. The kinematic analysis of the feeder operation and its interaction with the load has been carried out. We have derived the parametric equations of the blade motion when the loader is traveling and the shaft is rotating in the coordinate form. Relying on the length of the blade trajectory, it is presented the expression for the determination of the continuous-action loader with the combination feeder efficiency. The efficiency depends on the physical and mechanical properties of the load, operational and design specifications of the feeder.
Refinement of the procedure to determine durability of abrasive materials
Authors: Pushkarev O , Bagaiskov Yu 
Published: May 2020

Abstract
Material performance as well as its purpose and way of use depend on its physical and mechanical properties. The Shlif device based on a small-sized friction machine was used to test durability of abrasive materials. The conditions and procedure of such studies were refined. Boron carbide with grain size F 80, sample weight of 0.04 g, specific sample load of 0.01 MPa was used as an abrasive body. According to the test results of the samples, the wear time is 5 minutes. Since the results of studying the sample wear are sensitive to process factors and tool parameters, and there is a correlation relationship with the field test results, the results can be used for rapid quality analysis of abrasive tools in the process of production and operation, as well as for designing of new types of tools.
Applications of fatigue gauges for detection of subsurface cracks and defects
Authors: Tyutrin S G 
Published: May 2020

AbstractThe possibility of using fatigue gauges to detect cracks and crack-like defects that occur at some depth in the specimens was investigated. Industrial tin foil with additional annealing was used. Subsurface cracks were modeled by cross drilling followed by cutting with steel wire. The distribution of appearing stresses under the action of static load was estimated by the finite element method. In the presence of a subsurface crack, the first manifestations of fatigue damage on the gauge surface are observed in two zones located from the dangerous section at a distance approximately equal to the depth of the crack. This allows not only to diagnose the presence of cracks and similar defects, but also to determine the distance from the top of the crack to the surface of the specimen.
Improving the quality of lint by strengthening the cleaning of cotton seeds from waste
Authors: Abdugaffarov Kh J , Safoev A A , Murodov O J 
Published: May 2020

Abstract
The article indicates that in order to obtain a lint in accordance with quality requirements, an amplifier is required for the process of cleaning cotton seeds from weed impurities and the article presents the results of experimental studies of a screw conveyor for transporting cotton seeds from gin to linter machines, which has a unit for cleaning seeds from weed impurities. It is shown that the rotational speed and pitch of the screw have a significant effect on the cleaning effect of the installation. An analysis of the results of experimental studies indicates that with an increase in the speed of rotation of the screw and a decrease in its pitch, the cleaning effect increases.
The use of neural network technologies to optimize the shape of an object during mass transfer of air
Authors: Chernov N N , Kovalev A V , Palii A V , Sayenko A V , Maevskiy A M 
Published: May 2020

Abstract
In this article, the authors propose using a neural network to optimize the aerodynamic drag of a body in a gas flow. The use of such optimization methods using evolutionary algorithms makes it possible to obtain a mathematical model that describes the shape of the aerodynamic profile, which allows the operator to easily change parameters. It is shown that the value of the drag force for a body of optimized shape is lower than the values for bodies of rotation and known profiles taken for comparison. As bodies, we can consider parts of engineering structures in the air flow, parts of vehicles, and bodies located in the air flow in the duct, in particular in the duct of the photo separator. The latter is important from the point of view of neural network photo separation of seeds and grain.
On preventing resonance condition in operation of rotary excavators
Authors: Liberman Ya L , Lukashuk O A 
Published: May 2020

Abstract
The article examines the causes of forced vibrations of the rotor. It was found that the increased tendency of rotary excavators to oscillate is caused by the frequency of scooping, which leads to self-oscillation. Основной причиной возбуждения нежелательных колебаний в роторных экскаваторах является формирование в процессе резания грунта сил отрицательного сопротивления. The frequencies of natural and forced rotor vibrations during the digging of different soils are determined depending on the speed of rotation of the working body and the depth of digging. The dynamic stability of the movement of the working body under the horizontal elastic pliability of the structure is investigated. The condition of occurrence of resonant phenomena during operation of a trench rotary excavator is determined.
Improving aerodynamic characteristics for drag reduction of heavy truck
Authors: Markina A A , Lukashuk A D , Chepkasov S N , Starovoytenko A V 
Published: May 2020

Abstract
Significant increasing vehicle performance can be achieved by reducing aerodynamic drag because of rising average speeds and reducing fuel consumption. Russian truck manufacturers do not prioritize the truck aerodynamic issues, therefore majority of existed models has a very high value of drag coefficient, and moreover, vehicles older than 10 years predominate in operation. In this regard, against the background of rising prices for liquid fuel, the reduction in aerodynamic drag allows to solve the problems posed. The article presents the results of a study of the aerodynamic drag coefficient for KAMAZ heavy truck when using a set of cab fairings of different shapes. Using the software, the analysis of the influence of the shape of the fairing on the coefficient of air resistance of the car is made. As a result, fuel economy is calculated taking into account the selected optimal cab fairing and cab–side extenders from the aerodynamic drag coefficient
The criterion power for identifying symmetric models
Authors: Polosin V G 
Published: May 2020

Abstract
The paper contains a theoretical material of research of power of entropy-parametrical criterion of the consent that used simultaneously both informative and statistical properties the samples data. As a result of the study, it was shown that the space of the reduced signs of the competing hypothesis is anisotropic. For this reason, in the entropy coefficient and anty-kurtosis space as the position as and the shape of the decision area depends on the direction and distance between the null and competing hypotheses. For various significance levels of the criterion, the dependences of the power of the entropy-parametric criterion on the modulus of the distance between the null and alternative hypotheses are obtained. These dependences are given for various directions in the space of reduced signs of distributions of the competing hypothesis provided that zero hypotheses is Laplace distributions.
Algorithm for calculating the technological parameters of the process of extrusion of rods from powder compositions based on iron
Authors: Polyakov A P , Polyakov P A 
Published: May 2020

Abstract
An algorithm is proposed for calculating the technological parameters of the process of extruding rods from iron-based powder compositions, which makes it possible to predict the density of the rods depending on the initial porosity of the briquette, the drawing ratio, the taper angle of the matrix, and determining the extrusion pressure. Criteria are selected for the selection of conditions allowing, after extrusion, to obtain a bar suitable for subsequent thermomechanical processing. The obtained data is supposed to be used for technological calculations of the processes for the production of engineering parts by powder metallurgy methods.
Simulation of the robotic transport devices characteristics
Authors: Chigbu A E , Danilov A D , Burkovsky V L , Gusev K Yu , Gusev P Yu 
Published: May 2020

Abstract
Modern development of microelectronics has made it possible to create a variety of compact technical tools that help in all areas of human activity. The scale of production of microelectronic components has enabled the development of many areas of science and technology that were previously engaged in only a few specialists. One of these areas is robotics. The development of robotics solves many problems-from everyday household needs to narrow specialized tasks related to space technologies. However, one of the most relevant applications of robotics is manufacturing. This is primarily due to the fact that the life cycle of any product begins with production. Industrial robots represent a wide class of technical devices which can perform such actions as: Assembly, welding, moving, warehousing, etc. At present, there are already fully robotized production, where man is only an observer, which interferes with work in a pinch. Separately, we should note the possibility of using artificial intelligence technologies in industrial robots, which provide adaptation to various tasks. However, there is a wide range of problems where the use of artificial intelligence is not justified and their solution should be thoroughly studied.
Mathematical model of the formation and burning of smoke-black particles in a motor cylinder during operation on an EFE
Authors: Likhanov V A , Anfilatov A A 
Published: May 2020

AbstractVarious models of the mechanism of smoke-black formation in the combustion chambers of an engine during the combustion of hydrocarbon fuels with the addition of alcohol are considered and analyzed. The models most suitable for use in numerical modeling of the diesel engine workflow are selected. To assess the effect of alcohol on the smoke-black content in exhaust gases, a calculation model was used, the main provisions of which are presented in the work.
The results of the influence of methanol on the effective performance of a diesel engine when working with DFS
Authors: Anfilatov A A , Chuvashev A N 
Published: May 2020

AbstractThe most effective way to use methanol in internal combustion engines today is to supply it directly to the diesel cylinders using a dual fuel supply system and igniting the ignition portion of diesel fuel. Thus, the study of the working processes of diesel engines refitted to work on alternative renewable fuels (methyl alcohol) is an urgent scientific task of important national economic importance, since it allows replacing petroleum motor fuel, and significantly improves effective, power, economic and environmental indicators. As a result of the adjustment tests of the 2H 10.5 / 12.0 base diesel engine when operating on diesel fuel and methanol with a dual fuel supply system, we can conclude that the installation angles of feed start are optimal from the point of view of efficiency and economy Θdf= 34 ° and Θm= 34 °.
Wood gas generator management system for vehicles
Authors: Popov A A , Gritsenko E M , Nosyrev S A 
Published: May 2020

Abstract
This article presents the design and development aspects of a software package and hardware configuration which are allows for the preparation and supply of an air-fuel mixture to a car’s internal combustion engines which using charcoal or firewood as fuel. The software package and hardware should be implemented as a fuel control system. The microcomputer processes the signals from the sensors and allows you to receive data using the semi-automatic control of the fuel system, in addition collects statistical data and provides telemetry output to the dashboard or on the remote display and can be controlled via wireless interface. The following information is recorded in the database: state of sensors, current system settings and actions performed by the user. A remote device running on the Android operating system is connected via the widespread wireless Bluetooth communication channel, real time information about the system and the fuel system control interface are displayed in graphical form.
Estimating the effect of instrument accuracy on the accuracy of mathematical modeling of quality indicators of oil treatment for transportation
Authors: Konygin S B , Konovalenko D V , Kryuchkov D A 
Published: May 2020

Abstract
This paper is dedicated to mathematical modeling of oil treatment quality indicators. The system developed by the authors uses the results of measurements done with the instruments that the oil treatment unit is equipped with as the initial data for the modeling. In this regard, the effect of instrument measurement accuracy on the accuracy of prediction of crude oil quality indicators is relevant. The coefficient values of the effect of instrument measurement accuracy on saturated vapor pressure of the crude oil were estimated using a mathematical model of a typical oil treatment unit. It was shown that the prediction accuracy was most affected by the accuracy of measurements of temperature and gas consumption at the last separation stage.
Justification for the introduction of in-line diagnostics technology for field pipelines
Authors: Savicheva Yu N , Nafikova E I , Davletchina K S , Sandyrev K Yu 
Published: May 2020

Abstract
The article discusses the problems of introducing the technology of in-line diagnostics in field pipelines of small diameters. The necessity of introducing optimized in-line diagnostics for oil and gas companies is substantiated. A description is given of the concept of creating in-tube defect indicators (IDI), based on the use of electromagnetic and galvanomagnetic converters with magnetization by a constant magnetic field.
Controlling the periodicity of grinding wheel dressing with the application of expert decision support system
Authors: Samoylova E M , Zakharchenko M Yu , Vinogradov M V , Babenko M G , Ignatiev A A , Slesarev S V , Melentiev V A , Bokova L G 
Published: May 2020

Abstract
The article considers the influence of the grinding wheel dressings frequency on the end product quality after processing; it describes developing of smart algorithms for CNC grinding unit as a part of Expert Decision Support System with software implementation.
Cobots and the benefits of their implementation in intelligent manufacturing
Authors: Galin Rinat , Meshcheryakov Roman , Kamesheva Saniya , Samoshina Anna 
Published: May 2020

Abstract
The perspective of robotics in intelligent manufacturing becomes with Industry 4.0. Increasing the profitability of production is the main goal, which also depends on the organization of safety and efficiently human-robot interaction in a shared work place. Perspective robotic solutions integrated into intelligent manufacturing makes able to contribute an increase of automation in production with safety compliance. The portability and compactness of robots allow to optimize the production process and improve efficiency. An important stage of robotics was the ability to take robots outside of barriers and place them next to humans. This robotic solutions market is growing up every year. This indicates a high demand for the introduction of robots in intelligent manufacturing. Already today we can see how the main players in automated manufacturing have taken the first steps towards Industry 4.0.
Steering actuator based on a ball screw with a separator
Authors: Abdulin R R , Bolshakov V V , Podshibnev V A , Samsonovich S L 
Published: May 2020

Abstract
This paper considers the issue of improving the reliability of an electromechanical actuator in which the possibility of ball screw jamming has been excluded. For this purpose, an analysis of design solutions which allows to increase the reliability of an electromechanical ball screw linear actuator was carried out, design of ball screw with a separator was developed and patented, experimental studies of an actuator prototype with ball screw with a separator were carried out. The proposed constructive solution of ball screw, in which the nut is made without an internal thread, significantly simplifies the design and manufacturing technology. For experimental determination of static and dynamic characteristics of the actuator containing ball screw with a separator a mathematical model has been designed and a prototype similar to the electromechanical actuator with ball screw with ball recirculation has been made. The experiments showed that compared actuators have practically same static and dynamic characteristics, but the efficiency of the ball screw with a separator is lower than that of ball screw with ball recirculation, the reasons for the decrease and ways to increase efficiency in ball screw with a separator are considered.
Mathematical and computer modeling of a planar mechanism with a certain number of links
Authors: Mikhaschenko T N , Gavrilchik M V , Safronov V V , Sidorov P V 
Published: May 2020

Abstract
The article describes a mathematical model of the functioning of a certain planar mechanism, consisting of a finite number of links, interconnected by various types of communication. A software application has been developed that allows simulating various assembly options for most mechanisms based on analytical calculations and computer analysis. The mathematical basis of the study is the numerical methods for solving systems of nonlinear equations and coordinate - vector method for describing the position of the links of the planar mechanism.
Development and analysis of tool design for precision blind holes
Authors: Yakovlev V A , Tretyakov A E 
Published: May 2020

Abstract
Precise blind holes are very often used in machine part designs. As a rule, these holes are processed using CNC machines using various operations, or sequentially with various tools, which is the least cost-effective in contrast to a multi-function CNC machine. Comprehensive processing is a fundamental and crucial factor.
Active hybrid bearings as mean for improving stability and diagnostics of heavy rotors of power generating machinery
Authors: Shutin D V , Polyakov R N 
Published: May 2020

Abstract
The article describes a theoretical study of basic features of active hybrid bearings used as supports for heavy energy-generating machines equipment, primarily turbine generators and their turbines. Due to the adjustable oil supply pressure and using a controller of a rotor position AHB reduces its vibration level. Vibration velocity can be reduced from several times for smaller rotors to tens of percent for heavier ones. The eccentricity of the rotor position in the bearing also affects the efficiency of vibration reduction. In this case also some nonlinear effects are observed. In addition, AHB can possibly be used as a diagnostic tool for monitoring the health of a heavy power generating machinery due to its ability to generate power test impulses for rotor excitation and further analysis of its response.
The Industrial Internet of Things as one of the main drivers of Industry 4.0
Authors: Magomadov V S 
Published: May 2020

Abstract
The Industrial Internet of Things (IIoT) is one of the most important technologies offered by the fourth industrial revolution. This phenomenon is a promising technology which is able to transform industrial segments in a major way. Therefore, this paper is focused on this aspect of the fourth industrial revolution and attempts to explain what it is and how it is used by companies. The paper also explains how the IIoT is different from the Internet of Things as these two areas have a lot in common but there are also some major differences. Furthermore, it is explained in this paper what kind of challenges this technology has to face in the process of its development and integration. For example, such challenging aspects of this technology as scalability and security are discussed.