bluuebunny/crossref_metadata_2025_split huggingface dataset:
Analysis of the operational characteristics of the main units of BelAZ vehicles in a coal mine
Authors: Lagunova Yuliya , Bochkov Vladimir , Horoshavin Sergey 
Published: January 2020

Abstract
A comparative analysis of the operational characteristics of the main components of BELAZ mining vehicles has been carried out. It is shown that the choice of type and means of career transport is determined by a number of factors and, first of all, by the characteristics of the transported cargo, the distance of transportation, the scale of work and the pace of their development. The power of vehicles depends on the scale of work (freight turnover), and the pace of mining operations determines the requirements for the operational reliability of career vehicles. The dependence of the dump truck failure parameter on the service life is disclosed. The analysis of the state of metal structures of structural elements of the dump truck BELAZ-7530 based on the method of non-destructive testing is given. As a result of the analysis of thermal imaging and measurements of the thickness of the walls of the motor housing, it was established that the amount of wear depends on the heating temperature of the metal structures.
Cutting tools hardening and sharpening by fast argon and nitrogen atoms
Authors: Metel A , Nay H A , Mustafaev E 
Published: January 2020

Abstract
A reamer made of AISI M2 high-speed steel was heated by ions accelerated from the plasma by a bias voltage applied to it and kept at 500°C for 120 min. Microhardness of the reamer surface increased by 1.75 times and the nitride layer thickness reached 130 μm. Nevertheless, radii of the cutting edges increased by 5 times up to ~ 40 μm, which made the tool blunt. Another reamer was heated by a converging beam of fast atoms produced by an immersed in the same plasma concave grid under a negative voltage of 5 kV. Due to uniform removal of the reamer material by the beam, the radii of cutting edges decreased from the initial value ~ 8 μm down to ~ 6 μm.
Estimation and ways of mechanical efficiency upgrading of planetary rotary hydraulic machines
Authors: Volkov G Yu , Smirnov V V , Mirchuk M A 
Published: January 2020

Abstract
Planetary rotary hydraulic machines (PRHM) with wavelike sun wheels and floating satellite wheels have high technical characteristics but they are understudied. The article is devoted to the estimation of energy efficiency of PRHM at the stage of their projecting. Calculated formulas for the pump and hydraulic engine are offered. The comparative estimation of schemes with the numbers of waves M×N: 2×2; 3×3; 4×4; 2×4; 4×6, has shown efficiency values close to each other a little bit more than 0.9. The reserve for efficiency upgrading for the considered hydraulic machines is the use of the teeth with half-round convex-concave side surfaces.
Rounding sharp edges of machine parts with elastic polymer abrasive wheels
Authors: Dimov Yu , Podashev D 
Published: January 2020

Abstract
The effectiveness of elastic polymer-abrasive wheels when rounding edges has been proved. The research showed the influence of cutting speed, deformation of the tool and feed along the edge on the quality of the machined edge and the productivity of the process. Empirical equations are proposed for calculating the parameters of quality and productivity depending on the processing regime parameters.
Prediction of the insensitivity zone in the design of the feed drive CNC lathe
Authors: Denisenko A F 
Published: January 2020

Abstract
The processing on CNC machines of parts of a complex profile with multipass shaping schemes is accompanied by multiple changes in the direction of movement of the working bodies (reverse) during the cutting process and at idle running. When reverse, loss of information is possible due to the presence of gaps in the chain of feed drive and elastic deformations determined by constant loads overcome by the drive. Permanent loads consist of cutting forces and friction in the feed drive chain. Information loss is defined as a position insensitive zone at a position. To determine the insensitive zone, a technique is proposed that takes into account the differential accounting of friction losses in the mechanical feed drive chain. To estimate the elastic deformations in the drive chain, design schemes are proposed and analytical dependencies obtained. Differentiated consideration of friction in determining the insensitive zone allows you to outline the main ways to improve feed drives. It is shown that the magnitude of the preload on the thrust bearings and the tensile forces of the lead screw during assembly do not have a significant effect on the size of the insensitive zone. Even less impact on the dead zone has a preload change in the transfer screw-nut rolling. It was determined that the main ways to reduce the insensitivity zone is to increase the rigidity of the screw-and-nut rolling transmission anchor to the machine carriage and reduce friction in the guides. In addition, an analysis of the layout decisions of the lead screw assembly (one-sided and two-sided termination) according to the insensitive zone criterion showed that the use of one-sided termination of the lead screw is more rational.
Digital transformation of the Bulgarian industry
Authors: Ahmedova Sibel 
Published: January 2020

Abstract
Information and communication technologies are the major driving force of the digital revolution in Europe and the bedrock underpinning the construction of a competitive knowledge-based economy. As a Member State of the EU, Bulgaria is pursuing a policy on the preparation and development of human, institutional and organisational capacity necessary to obtain societal and economic advancement. Adopting such a perspective, the paper aims to explore the nature of the digital economy in the context of Industry 4.0. To that end, the paper further examines the state of utilization of digital technologies in the Bulgarian industrial enterprises, which provided the basis for specific set of recommendations to be made on improving the process of digital transformation of the Bulgarian industry.
Synthesis of the suboptimal control algorithm for electroplating processes under conditions of uncertainty in the range of processed products
Authors: Solovjev D S , Solovjeva I A , Litovka Yu V 
Published: January 2020

Abstract
The paper discusses the main difficulties in finding the optimal control for obtaining high-quality electroplating in a rapidly changing product range. A suboptimal control search algorithm is proposed for solving this problem. This algorithm is reduced to finding the geometrically closest product to the existing ones, for which the optimal solution in the control matrix is known. The results of the suboptimal control search algorithm are given on the example of the zinc coating of a complex shaped product. Recommendations are given to improve the performance of the algorithm and the quality of the found suboptimal control.
Mathematical model of the elongated body vibrations to describe the elastic properties of the aerial vehicle
Authors: Kramar V , Volodin A , Panasenko V , Khoroshev V 
Published: January 2020

Abstract
The article deals with the problem of building models of oscillations of an elongated body, which, in particular, can be imagined as an aerial vehicle. The general theoretical information of the aeroelastic vibrations of the aircraft is also considered.
Technology of ion implantation of structural materials (patent life-cycle analysis)
Authors: Ovchinnikov V V , Kurbatova I A , Uchevatkina N V 
Published: January 2020

Abstract
The article presents a patent analysis of the life cycle of ion implantation technologies for structural materials. S-curve. In the total volume of patent documents, the Russian Federation ranks first in the number of patent documents (125). The dynamics of published patent documents in the field of technology has proved that in 2014 the number will not be reached.
Analysis effectiveness functioning urban transport system based on the duration of the movement
Authors: Poltavskaya J O , Lebedeva O A 
Published: January 2020

Abstract
The article deals with the analysis of the effectiveness of the functioning of the urban transport system based on the dependence of the duration of movement. An important characteristic of the quality of the system is the reliability and comfortable conditions of movement. In turn, such indicators as travel time and «buffer» indices, «buffer» time are used to assess the degree of reliability. To calculate the indicators, it is necessary to conduct studies of the modes of movement of public transport and the car-laboratory in the context of varying load on the road network. Based on the available data, functional dependencies have been established that allow determining the duration of movement of public transport depending on the duration of the car-laboratory movement. The result of the study is a developed methodology for assessing the functioning of the transport system.
Analysis of traffic flow in an urban environment based on simulation
Authors: Lebedeva O A , Poltavskaya J O 
Published: January 2020

Abstract
The article deals with the topic of simulation. The transport system is an important factor in the economic development of the urban environment. Its development is influenced by the condition of the roads, the intensity of road traffic, and the time costs of moving. Traffic closures have a negative impact on the quality of traffic management. To improve the efficiency of the transport system, we suggest using simulation modeling to analyze and optimize the duration of traffic. Research in the field of optimization of traffic flow Angarsk. You get that by increasing the speed by 50% the transport network does not cope with the load. The functional relationship between traffic intensity is established.
Research of dependence of wearing capacity and resource of the hardened areas of surfaces of details of construction machinery from the profile and structure of cross-section of track hardening at laser processing
Authors: Ivanov M V , Burlachenko O V , Vovko V V 
Published: January 2020

Abstract
The method for increasing the wearing capacity of surface layer of details of construction machinery is proposed. The features of the hardening of the surface layer during laser processing are considered. Experimental studies of dependence of wearing capacity on the profile and cross-section structure of track are shown.
Machine control systems for leveling areas for road investments
Authors: Szafranko E 
Published: January 2020

Abstract
Earthwork is an essential stage in road construction. The proper and efficient performance of earthwork is a necessary condition of a successful execution of a road building project. Earthwork is carried out with suitable machines and implements, which allow mechanisation and acceleration of the task. In order to fully implement these machines, control systems are employed, as these improve the accuracy of the earthwork done, enable machine operators to carry out their work more easily, and support the processing of data. This article describes automated and laser systems used for this purpose. The situation on building sites where such systems are deployed has been analysed. The article contains the results of this analysis.
Interaction of a motor unit wheel with a support base
Authors: Ovsyannikov Sergey 
Published: January 2020

Abstract
The problems of kinematics and mechanics of interaction of a rigid metal wheel with a deformable base on basis of the theory of instant tipping of a lever are considered. Calculated dependences are presented to determine the main indicators of interaction of the wheel with the supporting surface: strength, speed and power. It is established that rolling of the drive wheel, in comparison with the follower wheel, leads to an increase in the depth of the track, and rolling resistance force decreases in this case.
Determination of upset ingot dimensions during computer-aided forging design under fuzzy goals
Authors: Kanyukov S I , Konovalov A V , Muizemnek O Ju 
Published: January 2020

Abstract
The paper describes an algorithm for determining reasonable dimensions of an upset ingot during computer-aided design of shaft press-forging under fuzzy goals. Fuzzy goals related to product metal elaboration quality and the complexity of its manufacture are formulated. Objective values of a design parameter for each goal are determined. Membership functions for possible solutions corresponding to these goals and the rule of choosing the most reasonable solution are constructed. Two examples of solving the problem depending on the selected goals are given. The proposed algorithm allows one to choose the most reasonable solution from a set of feasible ones and reduces human participation in the computer-aided design process. The developed approach can be applied to solving other problems of press forging, such as choosing an ingot, determining the necessity of the billet upset operation, determining the cogged billet dimensions, etc.
Cutting data effect on machine tool vibrational state and surface roughness when machining
Authors: Aleynikov Dmitry , Lukyanov Anatoly , Savilov Andrey 
Published: January 2020

Abstract
The article is devoted to the study of vibration processes of metal-removal equipment. In the course of the study, the dynamic phenomena arising in the metal processing in this complex dynamic system have been investigated for the purpose of further control of cutting modes that minimize the accompanying oscillations and vibrations. This article presents the results of studying the dependence of the roughness parameters on the vibration of the spindle assembly and processing modes in the milling operation. Planning techniques and experimental statistic were used in our investigation. The dependence of vibration acceleration root-mean square parameters (RMS parameters) on cutting set modes was determined. Monitoring of vibration parameters when machining centres operating allows improving the quality of parts processing and preventing expensive machine operating under dangerous dynamic load.
Increasing power efficiency of open-pit excavators
Authors: Lukashuk O A , Komissarov A P , Letnev K Y 
Published: January 2020

Abstract
It is shown that a working process of rock excavation realized by an open-pit front-shovel excavator is characterized by an increased power intensity due to counteraction of its main actuating mechanisms (lifting and thrusting), whose operational parameters have to be properly matched during their joint action to provide more efficient excavation. A computational experiment allowed to determine an actual work of lifting and thrusting forces immediately involved in developing an excavated face. It was further established that power inputs depend on the bucket position relative to the working area of an excavator, and such regions of that area where those inputs are higher were determined. Differentiated calculation of the inputs was carried out, based on the type of a conducted operation – power inputs originating from excavating, from counteraction of the main mechanisms, and from lifting operational equipment parts and rock. The power intensity of excavation was estimated for various regions of the workspace of the excavator. The proposed method for calculating the power inputs of rock excavation using the operational equipment of an open-pit excavator would allow to determine an energy characteristic of the excavator for specific mining and technical conditions of operation.
Influence of the brake lining position on the efficiency of the centrifugal friction roller
Authors: Safronov Eugene V , Nosko Andrey L 
Published: January 2020

Abstract
Brake roller is one of the safety elements of a pallet flow rack. At present, most widely used construction of brake roller is centrifugal friction roller (CFR). Efficiency of the CFR is ability to limit speeds of a pallet with different masses in pallet flow rack, and while the lower the speed, the higher efficiency of CFR. One of the parameters that affect to CFR efficiency is frictional lining position on the brake pads of CFR, which can be define with angle of brake lining position. The article is devoted to calculation the influence of angle of a brake lining position, its operating range finding. Analytical research was conducted for the CFR prototype. It is reported that effective areas of the angles is lies closer to the boundaries of operating range and it is non-effective to install a brake lining in the middle of the operating range.
Effect of microarc oxidation regimes on corrosion resistance of coatings formed on piston aluminum alloys
Authors: Dudareva Natalia , Ustimova Elena , Enikeev Rustem 
Published: January 2020

Abstract
The effect of the concentration of a silicate-alkaline electrolyte and electric modes of process micro-arc oxidation on the corrosion resistance of the surfaces formed on aluminum alloys of different chemical composition was investigated. Alloys traditionally used for the manufacture of pistons of internal combustion engines (ICE) were analyzed. The corrosion resistance was investigated in solution, the composition of which to the greatest extent close to the conditions of cylinder-piston group of internal combustion engines. The corrosion resistance of the samples was estimated by the mass rate of corrosion during their exposure in corrosive solution for 144 hours. The regression equations linking the concentration values of the electrolyte and of technological modes of MAO with the corrosion rate was obtained. It is established that the conditions of the process significantly influence the corrosion resistance of the coatings. Surface treatment by the method of MAO increases a corrosion resistance by 2.9…31.9 times, depending on the sample alloy and MAO modes.
Substantiation of the trajectory planning algorithm for unmanned tracked vehicle
Authors: Derzhanskii V B , Taratorkin I A , Yakovlev A G 
Published: January 2020

Abstract
Mobility operation of an unmanned transport vehicle (UTV) when operating on rough terrain is a difficult task. The most difficult is the problem of the tracked UTV motion. Simplification of the controlled motion simulation, ambiguity of the track – terrain interaction parameters, the random nature of external impacts lead to fuzziness of the status parameters of the UTV as a controlled object. The article proposes a method for trajectory planning of the UTV motion, taking into account the nonholonomic nature of the track – terrain interaction. Within this objective, three aspects of the research stand out sharply. First, refinement of the tracked vehicle mathematical model. Secondly, the Voronoi diagram method is the basis of the algorithm for motion trajectory planning. Thirdly, the parameters of interaction with the external environment, in particular, the dependences of the coefficient of resistance to side slip, being obtained in real time, allow us to synthesize a correcting matrix that provides for increased motion stability. The effectiveness of the proposed approach is planned to be assessed by UTV controlled motion simulation and during experimental investigations.
Determination of the design parameters of the simulator breathing apparatus for training complexes
Authors: Obukhov Artem , Dedov Denis , Arkhipov Alexey 
Published: January 2020

Abstract
The paper considers an approach of improving the quality of training for personnel of industrial and mining enterprises working in polluted atmosphere conditions through the use of training complexes. Within the framework of this problem, the choice of designs of heating units for gas breathing mixes and breathing resistance for the breathing apparatus simulator of the training complex is considered. A comparative analysis of possible designs and the choice of the optimal solution are implemented. The resulted simulator allows you to properly organize the learning process and increase its effectiveness by eliminating one-time and expensive self-rescuers. Practical studies of the simulator with selected designs of heating units and breathing resistance were carried out in order to verify that its functioning complies with the real-life insulating breathing apparatus.
Friction Stir Welds Strength under Two-Dimensional Stress State Conditions
Authors: Pashchenko V V , Trukhanov K Yu , Tsarkov A V 
Published: January 2020

Abstract
The friction stir welding (FSW) is a solid-state joining technique. This process is normally used for different aluminum and magnesium alloys. FSW provides joint mechanical properties superior to arc welding. This properties estimation is a result of uniaxial tension test. In the vast majority of cases the welded plate structures are operated under biaxial stress state. This paper aims at establishing a relationship between biaxial loading conditions and mechanical properties in welding of 5083 type aluminum alloy using friction stir welding. The biaxial stress state was formed due to particularly designed samples. The specimens with different geometry and location of the pairs of raisers stresses are considered. All calculations were performed in ANSYS. The experimental verification of the numerical simulation results is presented.
Mechanical challenges of electrical transmission lines inspection robot
Authors: Bahrami M R , Abed S A 
Published: January 2020

Abstract
In this article, the dynamics of electrical transmission lines inspection robot while moving on the line has been investigated and mathematical modeling issues of its movement along the conductors have been considered. In order to achieve dynamical stability during the movement of inspection robot on the electrical line variation methods for problems of stretched string has been considered and solved. However, line inspection robot operation might be subject to failures because of conductor vibration. In this article, the robot-inspector considered as moving load and pendulum. As a result of even steady motion of inspection robot on the line, saw-tooth oscillations have been observed in the vertical plane that causes parametric oscillations in the perpendicular plane. In order to avoid dangerous oscillation, dynamic vibration absorber has been designed. The behavior of electrical line inspection robot motion through transmission lines has been studied.
Aerodynamic characteristics of a rotating sphere
Authors: Crawford K R , Mitiukov N W , Busygina E L 
Published: January 2020

Abstract
Modern ballistic models, both internal and external, are amazingly accurate. This is due in no small part to the advances in technology that reduced tolerances in the guns and provided testing equipment that provided consistent and valid results. There are few variables. This cannot be said for the era of smooth-bore cannon using black powder and firing spherical projectiles. The number of variables, both internal and external, prohibits the use of modern ballistic models. Therefore, research into those weapon systems must be focused on one variable at a time to build a firm understanding for the creation of a suitable model. The discrepancy in the coefficient of aerodynamic drag of the sphere can be explained by the rotation of the ball and the Magnus effect. The maximum variance is ±5.6%. This means that when internal ballistic calculations of smooth-bore guns must determine the speed of rotation of the ball for use in the external ballistics calculations.
Throughput analysis for order picking system with automated storage system
Authors: Nosko Andrey L , Safronov Eugene V , Boslovyak Pavel V 
Published: January 2020

Abstract
An example of using vertical lift systems for order picking tasks is given. Logical-mathematical is described and a simulation model of the picking process is built. Using simulation modeling allows you to calculate the performance of the picking process, the amount of necessary equipment and workplaces.