bluuebunny/crossref_metadata_2025_split huggingface dataset:
Twist drilling SPH simulation for thrust force and torque prediction
Authors: Boldyrev I S , Topolov D I 
Published: December 2020

Abstract
Drilling is one of the most common processes in metalworking. The cutting forces that occur during the drilling process have a significant impact on the accuracy and quality of the holes. Uncompensated radial cutting forces lead to an increase in the diameter of the hole being machined, which reduces its accuracy. And when machining laminated materials, excessive axial cutting force leads to a stratification of the composite and reduces the quality of the hole. In this regard, the task of determining or predicting cutting forces is currently quite relevant. This article proposes a method for calculating cutting forces when drilling aluminum homogeneous and isotropic alloy 6061-T6 using smoothed particle hydrodynamics method (SPH). The calculation results are compared with calculations using empirical formulas and the results of experiments of other authors. The influence of the chip separation criterion type and material model on cutting forces during drilling were also investigated.
Simulation of maximum elastic deformations during flat grinding of low-rigidity prismatic workpieces
Authors: Tyshkevich V N , Sarazov A V , Orlov S V 
Published: December 2020

Abstract
The flat grinding of low-rigidity prismatic workpieces side surfaces with the initial non-flatness of the base face is investigated. Mathematical models for determination of maximum elastic deformation of prismatic work-pieces when fixing and machining are presented. The theory of bars is used for determination of elastic deformations at the bending of prismatic workpieces. Maximal elastic deformation of prismatic workpieces at the bending is determined the method of More. Contact deformations of the surfaces of the workpiece and the machine table are taken into account. An experimental verification of the developed models was carried out.
Cutting of worm, spiroid and bevel gearwheel teeth by means of running-in cutter head
Authors: Trubachev E S , Bogdanov K V , Pushkareva T A 
Published: December 2020

Abstract
The paper considers an alternative to traditional methods of tooth machining for worm, spiroid and bevel gearwheels – by means of an assembled multi-tooth running-in cutter head with hard-alloy inserts. Within the cutting process the cutter head is rotated and fed along its axis concurrently with the rotation of the workpiece, thus implementing the generating worm with a continuous or variable pitch. It is preferable to make the multi-thread generating worm with regard to increasing the production efficiency and valid control of the level of contact localization. The design scheme of setting parameters is considered on the basis of providing the conjugacy at two design points assigned at opposite tooth flanks. The design scheme of the generated tooth geometry is also discussed. Design examples are given to show the possibility of providing the necessary degree of contact localization. The method is implemented at common and simply set metal cutting machine tools – universal gear hobbing machines and machining centres. As compared to traditional methods, the proposed method provides the effective control of tooth geometry, reduction of time and cost of production preparation, especially in the absence of the specialized equipment, staff and corresponding techniques at the production site.
Studying the processes of early structure formation of a modified cement paste
Authors: Samchenko S V , Abramov M A , Egorov E S 
Published: December 2020

Abstract
The article touches the structure formation process studying of cement paste by the results of heat evolution measuring. The features of early structure formation of cement samples obtained with the use of mineral admixture - pre-hydrated cement slurry, chemical admixture S-3 and their complex use are considered. Normal consistencies of cement specimens were compared. The intensification of heat evolution by cement specimens using a mineral additive is detected. The benefit of complex admixture has been revealed.
Surface quality of high-speed cutting plates in flat grinding by new abrasive wheels of “Saint-Gobain Abrasive” company
Authors: Canh Nguyen Duy , Canh Nguyen Van , Hong Pham Xuan , Hue Nguyen Ngoc , Duy Tran Dinh 
Published: December 2020

Abstract
The article detected the surface qualities of high-speed plates – HS10-4-3-10; HS6-5-1; HS18-0-1; W12V3Co10Mo3 and W9Co5 at flat grinding by news abrasive wheels of company “Saint-Gobain Abrasive” – 5NQ46IVS3; 5SG46K12VXP, 5SG46I12VXP, 5SG60K12VXP, TGX80I12VCF5 with using statistical approach. Parameters of surface quality were estimated allowing: microrelief Ra and Sm; form accuracy FLTt and microhardness HV. Because of violation of the condition of homogeneity and normal distribution of variance deviations, nonparametric statistical method was selected for analysis experimental data. According by results of research were recommended using abrasive wheels: 5NQ46IVS3 and 5SG46K12VXP for the formation of parameters Ra, FLTt, HV; and abrasive wheels 5SG46I12VXP and 5SG60K12VXP for the provision parameter Sm.
Building a model of the process of grinding screws for ball-screw transmission
Authors: Bogutsky Vladimir , Shron Leonid , Novosyolov Yury 
Published: December 2020

Abstract
Studies of domestic and foreign scientists show that the radius of the thread profile has a significant impact on the performance of BS transmissions: load capacity, rigidity, smoothness and durability. Therefore, the accuracy of the thread profile is high requirements. In order to ensure the high quality of transmission functioning, it is very important to obtain a minimum deviation on the entire length of the propeller of parameters such as the moment of idling, the changes of which characterize the smoothness of the work, and the rigidity on which it depends. precision of movement and installation in the required position of the machine’s working organs. Therefore, special attention is paid to ensuring the stability of the thread profile radius. For ensuring the stability of the radius of the thread profile, the article developed a mathematical model of the thread grinding process that ensures the preservation of the circle profile. It is shown that the obtained mathematical model requires experimental verification in the conditions of grinding the thread of the rolling screws and, if necessary, its corresponding refinement.
Equipment for improving the quality of finishing processing in floating workshops
Authors: Vladetskaya Ekaterina , Roshchupkin Stanislav 
Published: December 2020

Abstract
The article discusses the results of research and development in the direction of modernization of technological equipment for high-quality processing of parts in floating workshops by increasing vibration resistance and reducing harmful effects from the external environment (sea waves) and neighboring operating equipment. Traditional vibration isolation mounts of machines cannot be used in floating workshops due to their loss of functioning under the conditions of the floating base pitching and horizontal displacements under its influence. New effective constructive options for the vibration protection device of precision machines and supports with active vibration isolation are described, which allow automatic control of damping of the vibration isolating support of the machines under various types of external influences.
Cutting ability of abrasive grains in the processing of billets of plastic materials with the applying of ultrasonic vibrations
Authors: Unyanin A N , Khazov A V 
Published: December 2020

Abstract
The research was carried out in order to identify the relationship between the intensity of sticking of the workpiece material particles on the abrasive grains (AZ) of the grinding wheel with the physical and mechanical properties of the grains and ultrasonic vibrations (UZK) used in the processing process. Numerical simulation of local temperatures during micro-cutting (scratching) of samples made of 3X3M3F steel with abrasive grains made of various materials, including with the imposition of a narrow band. The deformation of the bulk and the stresses resulting from this deformation acting on the connection of the bulk with grains from materials with different coefficients of linear expansion are calculated. It was found that with increasing difference in the coefficients of linear expansion of the materials of the billet and AZ, the stresses that contribute to the separation of the adhesive from the surface of the AZ increase. In the course of experimental studies, samples were micro-cut with single abrasive grains. We controlled the salting coefficient equal to the ratio of the area of nalip to the area of the blunting site at the gas station and the wear of grain. It was found that AZ from Elbor wear out and become salted to a lesser extent when grinding with the imposition of a narrow-gauge blank.
Technological efficiency of introducing the energy of the ultrasonic field in the area of processing holes in complex packages of composite materials and titanium alloys
Authors: Kiselev E S , Savelev K S 
Published: December 2020

Abstract
The possibility of improving the quality of holes in complex packages of composite materials and titanium alloys for drilling operations by using the energy of ultrasonic vibrations introduced into the processing zone is considered. The design of two experimental installations based on a vertical drilling machine and an industrial robot is described.
Mechanical behavior and crystallization features of amorphous alloys based on cobalt and iron after annealing
Authors: Permyakova I E , Blinova E N , Dmitrievskii A A 
Published: December 2020

Abstract
The sequence of structural transformations of amorphous alloys Fe53.3Ni26.5B20.2 and Co28.2Fe38.9Cr15.4Si0.3B17.2 during heat treatment in a wide temperature range was studied by transmission electron microscopy and differential scanning calorimetry. The response of mechanical properties (plasticity, hardness, crack resistance) during transition from an amorphous to a crystalline state was investigated. The nature of discovered embrittlement phenomenon and plasticizing effect in amorphous alloys during annealing was discussed.
Structural Characteristics of a Copper-Nickel Alloy Obtained by Selective Laser Smelting
Authors: Baraz V V , Gerasimov S S , Gruzdeva I A 
Published: December 2020

AbstractA three-dimensional model from powders of a copper-nickel alloy Cu81-Ni19 composition is obtained by selective laser smelting. The 3D model microstructure is characterized by the absence of typical crystalline structure and contains elements of a quasi-amorphous state. The finished material differs from the standard monolithic cast billet with a lower surface roughness, higher hardness values while maintaining almost the same density indices.
Mathematical modeling and optimization of adaptive information system
Authors: Obukhov Artem , Krasnyanskiy Mikhail , Nikolyukin Maxim 
Published: December 2020

AbstractThe paper considers mathematical modeling and optimization of adaptive information systems. The presented mathematical model is based on the apparatus of theories of sets and graphs and formalizes the main components and the relationships between them in adaptive information systems. Based on the developed model, a set of criteria is formulated for assessing the quality of systems. The multicriteria task of optimizing adaptive information systems is posed. An algorithm for its solution and the practical implementation of an adaptive information system for transmitting a video stream are considered. The stated approaches to formalization can be used for mathematical modeling and optimization of various adaptive information systems for solving digitalization problems in technical and industrial sectors.
Solving optimization problems in the design of fixtures for flexible manufacturing systems
Authors: Khusainov R M , Mindiyarov R R , Petrovetskiy B I 
Published: December 2020

Abstract
This article discusses one of the technologies of digital production, expressed in the application of CAD/CAM systems and methods of mathematical optimization to the design of technological equipment intended for use in flexible production systems. The authors offer a solution of the problem of increasing the reliability of the manufacturing process on the machine by eliminating collisions of elements of technological equipment, by selecting the parameters of the technological system. The application of mathematical optimization methods for selecting parameters of technological equipment is considered. Optimization criteria for solving this problem and optimization parameters for this problem are derived and justified. The results of the solution are based on computer simulation of processing on a specific machine.
Mathematical modeling of changes in temperature distribution during friction stir welding in massive samples
Authors: Rzaev R A , Dzhalmukhambetov A U , Yu Dergunova O , Semenova L E 
Published: December 2020

Abstract
A mathematical model of temperature distribution in the process of friction stir welding (FSC) of a homogeneous massive body has been developed. The model makes it possible to take into account the geometric dimensions of the tool, the thermophysical properties and the temperature distribution in the sample during the transition of the welded material into the superplastic state. The paper presents comparisons of the temperature distribution of homogeneous thin-sheet and bulky samples. Measurements temperature were carried out at various points of the hemispherical sample during the FSW process. This model is used to estimate the linear velocity of the FSW associated with the thermophysical properties of materials. The calculation results are in satisfactory agreement with the experimental data.
Application of cognitive technologies for modeling of design and technological knowledge and automation of design activities
Authors: Volkova Galina , Turbeeva Tatyana , Grigoriev Oleg , Sobolev Alexandr , Dikov Ruslan 
Published: December 2020

Abstract
In this chapter the problem of modelling, representation and objectification of technical knowledge are considered A meaningful analysis of scientific and technical publications and design and technological documentation has revealed the features of reflecting technical knowledge in them and presenting it in various forms. This allowed us to develop a model for marking semantic elements and their structures in scientific and technical publications and technical documentation based on the method of conceptual (semantic) modeling in the framework of the methodology for automating intellectual labor (MAIL). To extract problem-oriented knowledge from scientific publications and technical documentation, a model for marking semantic elements and their constructions was developed. The markup model defines the fixation of significant semantic elements and constructs that are explicitly expressed in the document structure. The formed documentation structure defined a step-by-step methodology for the formation and processing of electronic funds of scientific and technical documentation.
Design of autonomous endoscopic video system
Authors: Filipovich O V , Maistrishin M M , Garmatyuk M I 
Published: December 2020

Abstract
The use of video endoscopic systems for medical purposes and possible directions associated with the improvement of their designs are considered. Within the framework of the design of a universal autonomous endoscopic video system, the solution of the problems of synthesizing a structural diagram, developing a structure and analyzing its elements is described. The block diagram of a block-modular system and a model of its assembly are presented. The keypad design process is described in detail. The areas of possible application of the video system and its differences from analogues are given.
Influence of elastic deformation of gear hone teeth on machined gear accuracy
Authors: Bagaiskov Yu 
Published: December 2020

Abstract
The material of resin-bond gear hones becomes deformed during operation. The gear hone tooth deformation value depends on the contact point position along the tooth height; it increases by ten folds from the lower point to the top. The deformation values are comparable with metal removal volume and the initial error values of the machined parts. Besides, the kinematic parameters of engagement vary, the values of specific sliding and contact pattern areas are distributed along the part teeth height more uniformly. This should affect the nature and the correction values of gear errors after machining. Experiments proved that accuracy of gears after machining by hones depends on the initial accuracy degree of gears and hones, the paired relationship of geared contacts, the value and nature of distribution of the gear-teeth initial error, machining time. Errors can be intentionally rectified by using gear hones with various elasticity degrees depending on the initial accuracy of parts.
Improving the layout of skid steer loader
Authors: Khomichev Alexey , Volkov Alexandr 
Published: December 2020

Abstract
The article analyzes the layout of the main components and units of a skid steer loader. The effect of placing the heaviest components on the tipping load is estimated. The necessity of increasing the duration of the loader without refueling is substantiated. An option is proposed to improve the layout of the machine to increase its operational performance. A test arrangement made using a 3D-modeling system is given.
Studies of the process of heating air in the inlet pipe for starting a diesel engine at low temperatures
Authors: Agureev I E , Elagin M Yu , Pavlov D V , Khmelev R N 
Published: December 2020

Abstract
Starting a diesel engine at low ambient temperatures presents significant difficulties due to low temperature of the air charge; increased resistance due to increasing viscosity of the oil, turning the crankshaft and moving other kinematically connected parts; deterioration of fuel atomization conditions; enhanced heat transfer to the cylinder wall; loss of part of the air charge. This article is devoted to experimental studies on heating the air at the inlet of a small-sized 1H9,5/8,0 diesel engine with air cooling at ambient temperatures of -20 ° C, -40 ° C, -60 ° C. As the result of experimental studies, the time of stationary values of air temperature in the combustion chamber, as well as in the inlet and outlet pipes was determined. Temporal patterns of changes in air temperatures in the combustion chamber, in the inlet and outlet pipes when scrolling the diesel engine with a starter are obtained.
Analysis of structures, properties and basic indicators of two-row axial piston hydraulic machines with an inclined cylinders block
Authors: Nizhegorodov A I , Gavrilin A N , Moyzes B B 
Published: December 2020

Abstract
The article reviews the possibility of developing double-row axial-piston hydraulic machines with an inclined cylinder block by improving the block design. The block design is improved by placing a second pumping unit in it and also locating additional working chambers with smaller pistons in the inter-cylinder zones. It is shown that an increase in the outer diameter of the initial cylinders block by only 10% provides an increase in the operating volume, torque and power of the new hydraulic machine by 33%. Such design improvement of the block of a new hydraulic machine in comparison with the analogue such as a hydraulic machine with an inclined disk gives a greater result: an increase in the operating volume, torque and power in a hydraulic machine with an inclined block is 78% more compared to a hydraulic machine with an inclined block, all other things being equal. The possibility of developing a high-torque axial-piston hydraulic motor by pairing two double-row pumping units while simultaneously eliminating the overall dimension of the bearing unit by closing axial loads on the drive shaft of the machine and halving the ripple is additionally considered.
Internal ballistics of smoothbore guns
Authors: Crawford K R , Mitiukov N W , Busygina E L , Alies M Y 
Published: December 2020

Abstract
The work is devoted to the problem of the formation of a mathematical model of a smoothbore gun. It is shown that due to the low accuracy of the initial data, the high accuracy of the mathematical model is not rational, and the mathematical model in the adiabatic formulation is quite reasonable. On the other hand, simple methods of numerical integration are excluded due to the discontinuity of functions at the beginning of the combustion phase of gunpowder. Accounting for the rotation of the cannonball, necessary for external ballistics, is possible only for a probabilistic task. Therefore, it will be most convenient to evaluate this parameter through the form factor of the external ballistic calculation.
Simulation modelling of the pumping station with a high-speed motor
Authors: Alies M Y , Volkov K G , Mitiukov N W , Busygina E L 
Published: December 2020

Abstract
Using a quadripole network, a model has been built for a metalworking-machine pump unit consisting of a triple plunger pump. It is shown that the use of a high-speed electric motor may lead to the appearance of resonance with a pump-unit manifold, and as a result, the equipment for pulsations control fails to operate effectively. To solve the problem it is necessary either to update the pump manifold in order to change its oscillation eigenfrequency or to use a different motor speed.
Process Quality Assessment
Authors: Pishchukhin A M 
Published: December 2020

Abstract
The work is devoted to the study of procedures for assessing the quality of technological process. It is emphasized that there are significant differences in the parameters for assessing the state of an object and a process. When the technological process proceeds, it most often requires smoothness, the absence of spasmodic changes, since violation of these requirements affects the quality of the final result of the technological process - the finished product. The concepts of process quality and control quality are further divided. To evaluate the latter, there are classical indicators: accuracy, speed, stability margin, and sensitivity. Changes in the quality level of the technological process reflect other characteristics, such as deviations in: synchronization, coordination, stability of technological modes and operational costs.
Investigation of the dependence of the quality control of the adhesive joint on the capacitance of the joint for various types of dielectric
Authors: Krechetova E V , Syritsky A B , Komshin A S 
Published: December 2020

Abstract
The control of adhesive joints is a mandatory step in the process. However, at present, there is no device that could be used at various stages of production. The main part of the devices allows you to control finished products. The developed method is based on the use of measuring the electrical parameters of a compound to control the quality of this compound. The essence of the method is as follows. An article containing glued elements measures one of the electrical parameters: capacity or resistance. The obtained value is compared with the theoretical value of this parameter calculated and set as “tolerance”. If the measured value is within the tolerance, then a conclusion is drawn about the suitability of this adhesive joint; otherwise, the connection is rejected. The data obtained allow us to conclude that there is a relationship between the measurement of the capacitance parameter of the compound and the thickness of the dielectric layer. However, for it is necessary to study in depth how this method behaves when working with other dielectrics and a relationship is traced between them. The processing of resistance measurement data also shows that the use of data on this parameter is possible, but with stabilization of the measurement conditions, since a stronger discrepancy with the theoretical (calculated) values was observed during the measurement.