bluuebunny/crossref_metadata_2025 huggingface dataset:
Approach to optimization of composite aircraft wing structure
Authors: Aung Phyo Wai , Tatarnikov Oleg , Aung Naing Lin
Published: December 2020

This paper describes an approach to optimization of composite aircraft wing structure basing on multi-criterion method. Two types of composite wing structures such as two-spar and three-spar ones were considered. The optimal layout of a wing frame was determined by Pareto optimization method basing on three criteria: minimal wing deflection, maximal safety factor and minimal weight. Positions of internal wing frame parts (spars and ribs) were considered as optimization parameters. As a result, an optimal design of a composite spar-type wing was proposed.
The technology of printed circuit board microdrilling
Authors: Mikhailov V P , Aung Tun Lin , Kazakov A V , Kopylov A A
Published: December 2020

The paper describes the device and operating principle of a high-precision positioning drive based on a magnetorheological (MR) elastomer for micro-drilling blind holes in multilayer printed circuit boards. The results of experimental studies of a drive with a closed control system for step-by-step movement are presented. The operation of the drive in the mode of active vibration isolation is shown and the coefficient of transmission of the vibration displacement amplitude is determined.
Information technology of ultrasonic assembly and pressing of joints
Authors: Shuvaev Vyacheslav
Published: December 2020

The paper considers the issues of increasing the efficiency of forming press connections by using additional ultrasonic vibrations introduced during the pressing process. A distinctive feature of the proposed approach is the use of ultrasonic vibrations simultaneously both for technological purposes to improve the efficiency of Assembly of press connections, and for indirect non-selective diagnostics of formed connections by analyzing vibrations directly in the Assembly process. The developed algorithm and device for ultrasonic pressing of teeth of a roller bit with an assessment of the quality of pressing on diagnostic indicators is presented.
Studying the process of electric discharge machining of products obtained by powder laser welding
Authors: Shlykov E S , Ablyaz T R , Muratov K R , Sidhu S S
Published: December 2020

In modern mechanical engineering, machine parts and mechanisms are made of new materials. These materials are characterized by enhanced mechanical properties. Expensive are products made from them. Deterioration of working surfaces leads to the need to replace the entire part. About 80% of the part is not subject to wear. The method of laser surfacing allows you to restore the part. The operability of the mechanism is returned. Cost-effectiveness is increasing. The processing of deposited surfaces is difficult. The properties of mechanical surfacing increases and cutting with a blade tool is not possible. Electroerosive technologies are beginning to be actively used in the processing of deposited parts. The study of the electro discharge machining (EDM) process of such details is now relevant. After EDM, the formation of the roughness of deposited surfaces has not been fully studied. The aim of the work is an experimental study of the EDM process of such surfaces. It is important to study the effect of EDM modes on the formation of roughness is important. A full factorial experiment was conducted during the study. EcoCut wire-cutting EDM machine selected as experimental equipment. Brass wire d = 0.25 mm is used as an electrode tool. The deposited material titanium VT-01 is selected for the experiment. An empirical model was obtained during the experiment. To establish the relationship between the EDM modes and the quality of the processed surface allows the model. An increase in the stress (U, mm) and the height of the workpiece (N, mm) leads to an increase in the roughness of the treated surface (Ra, μm) when processing titanium was found. The maximum roughness value for Ra = 3.3 μm is achieved at a voltage of U = 25 V, duty cycle q = 3.5, and a workpiece height of 10 mm.
The energy-power parameters of the semi-enclosed heading of the rod-shaped hardware
Authors: Zhelezkov O S , Kharchenko M V , Martynov E M , Suvorova E V
Published: December 2020

The paper presents a mathematical model developed on the basis of the variational method and the calculations of the energy-power parameters of the semi-enclosed heading of the rod-shaped hardware. The results of the calculations are illustrated in the form of a chart, which can be used to determine the deformation forces in relation to the ratio of sizes of the bolt heads to be formed.
Effect of laser beam cutting parameters on productivity and dimensional accuracy of miniature spur gears of stainless steel
Authors: Anghel Cristina , Gupta Kapil , Jen TC
Published: December 2020

Product quality and process productivity are one of the major indicators to evaluate the performance of any manufacturing process. The quality of any product covers its appearance, geometric and dimensional accuracy, and surface finish and integrity that majorly include microstructure, micro-hardness type of parameters. Whereas, the productivity can be determined using material removal rate. Laser beam cutting is an important advanced machining process and has been scarcely explored for miniature gears. This paper reports, the effect of laser beam cutting parameters on one of the quality parameters i.e. dimensional deviation of miniature spur gears of stainless steel and material removal rate. Box Behnken design of experiments methodology has been adopted to conduct a total of twenty nine experiments where four important laser parameters i.e. power, cutting speed, focal position, and gas pressure have been varied at three levels each. The manufactured external spur gear of stainless steel consists of ten teeth, 0.750 module, 9.04 mm outside diameter, and 4.5 mm face width or thickness. The investigation found that cutting speed significantly affected material removal rate and laser power affected dimensional deviation. Individual effects of laser parameters on both material removal rate and dimensional deviation are discussed in detail in the chapter. The investigation identifies laser beam cutting as a viable substitute of conventional manufacturing processes for fabrication of quality miniature gears with high productivity.
On the question of improving the finishing operations of processing precise holes in the hulls of ship machinery
Authors: Shron Leonid , Bogutsky Vladimir
Published: December 2020

The profile of the cut surface is a combination of shape errors, undulations and surface roughness. Plastic deformation allows you to reduce the surface roughness without changing the shape and waviness errors achieved by boring. Combining the operations of fine boring and fine plastic deformation of the surface allows not only to improve the quality of the treated surface, but also under certain conditions provides the opportunity to simultaneously increase the processing performance. The best way to combine these operations in terms of productivity is when both the cutter and the deforming tool are located diametrically opposite in the same hole of the boring bar. Are proposed and described the engineering methods for calculating and selecting the geometry of the deforming tool, the feed and the strain force for combining technological operations of fine boring and fine plastic deformation of the wasted surface of the main holes of the ship’s hull mechanisms.
Selection of rational modes of laser powder cladding
Authors: Gots A N , Gusev D S , Lukhter A B , Zavitkov A V
Published: December 2020

A brief overview of the surfacing used on the working surfaces of industrial equipment parts is given. The most universal method of laser surfacing is considered laser powder cladding. The results of experimental studies on the choice of parameters of surfacing modes for a single track are presented: laser power, mass flow rate of powder for deposition, and surfacing speed. Samples made of 08H18N10T steel were used as a substrate for testing. Laser powder cladding was performed on a robotic complex with an ytterbium fiber laser and a coaxial powder feed. When measuring macrogeometry, the quality of a single track was evaluated by its geometric dimensions: height, width, and depth of the layer mixing of the surfaced and base materials (substrate). Variable parameters of the surfacing process were the output power of laser radiation, processing speed, and mass flow rate of the powder. The quality of a single clad track was evaluated by its geometric dimensions: height, width, and depth of the layer mixing of the surfaced and base materials (substrate). it is Shown that the value of d depends on the mass flow rate and the power of the laser radiation: when increasing mass flow rate, it is necessary to increase power of the laser radiation to ensure a constant value of depth of the layer mixing. The shape of the deposited clad track is close to a half-ellipse only when the laser power not more than 1000 W and mass flow rate 15 g/min. The height of depends on the value of mass flow rate and the laser power: when increasing mass flow rate, an increase in laser power is required in approximately the same ratio. The width of the surfacing with increasing mass flow rate at a constant power of laser radiation decreases due to the fact that the cooling rate of the liquid phase of the metal melt is very high and only superheated melt can increase the width of the clad track.
Influence of production technology on the structure and properties of powder high-speed steels
Authors: Korotkov A N , Korotkova L P , Laschinina S V
Published: December 2020

Powder high-speed steels are a new group of tool materials with enhanced operational capabilities compared to steels made using traditional technology. The paper presents an assessment of the impact of powder steel production technology on their structure and properties. The studies are carried out on the example of two grades of experimental powder steels - R7M5F2-MP and M5F5-MP in three directions: the influence of compacting technology on the structure and properties of powder steels; development of optimum modes of hardening heat treatment; improving the quality control methodology of powder high-speed steels at the main stages of their production technology. A comparative analysis on the quality of the experimental powder high-speed steels depending on the chemical composition and various schemes for compacting workpieces from atomized powder is carried out. As a result of studies, the influence of hardening heat treatment modes on the phase composition, structure and basic properties of powder high-speed steels is established. Recommendations on hardening thermal working regimes to ensure the optimum ratio between hardness and heat resistance of steels are developed. Studies have shown feasibility of using powder high-speed steels (including domestic ones).
Optimization of granulometric composition of mineral part of fine-grained concrete modified by ultrasound
Authors: Belov V V , Kuliaev P V , Artemiev A A
Published: December 2020

Ultrasonic methods are widely used in the construction industry as methods of defectoscopy and non-destructive testing of physical and mechanical characteristics of concrete in structures. At the same time, ultrasonic treatment of concrete mix and freshly laid concrete can be used for the purpose of modifying its structure and properties as well. The relevance of the topic is directly related to the consideration of issues related to savings in construction, since it allows you to reduce the cost of introducing expensive cements into the concrete.
The role of nanostructure forming mechanism in the production of universal functional coatings with Fe-Ni, Co-Mn, Ni-Cr alloys
Authors: Zhikhareva I G , Schmidt V V , Denisenko D V
Published: December 2020

Galvanic nanostructured coatings with Fe-Ni, Co-Mn, Ni-Cr alloys with enhanced operational properties are obtained. Three mechanisms of ultrafine particles formation are considered: usage of the high-voltage alternating current (HVAC) method (Fe-Ni, Co-Mn), presence of a new hexagonal phase ε-Fe, which has dimensional effects. 2) introduction of a special carbamide additive, N-acid (Ni-Cr). 3) due to multilayer films Cr(OH)3·(H2O)·2H2O in the absence of an inhibitor (Ni-Cr alloy), the relationship between the nanostructure forming mechanism and the spectrum of functional properties is shown.
Ceramics on the basis of zinc orthostannate
Authors: Aksyutin I I , Rasskazin AV
Published: December 2020

This article presents the results of a study of the process of synthesis of zinc orthostannate powder by the traditional chemical method of mixing the initial zinc and tin oxides in a stoichiometric ratio of 2:1. The phase composition of this mixture after calcination at temperatures of 850-1250°C was studied by x-ray diffraction. The microstructure of the powder was studied by scanning electron microscopy. The optimal temperature for the synthesis of zinc orthostannate is 1250°C. The synthesized porous ceramics on the basis of zinc orthostannate (Pо = 38,6 %, ρ = 3,84 g/cm3)
Study of the morphology and elemental composition of electroerosive materials, obtained from waste based on W-Ni-Fe alloy in lighting kerosene
Authors: Ageev E V , Pereverzev A S , Selyutin V L
Published: December 2020

This article presents a study of the morphology and elemental composition of electroerosive materials based on W-Ni-Fe alloy, obtained in lighting kerosene. It has been shown that part of carbon is present in the resulting electro-erosion materials. The main elements in the resulting EED materials are W, Ni and C.
The study of high-temperature stability of the heat-resisting intermetallide coating
Authors: Tsareva I N , Berdnik O B , Krivina L A , Maksimov M V
Published: December 2020

The article presents the results of a study of the processes occurring in a heat-resistant intermetallic coating under ultrafast thermal heating by a laser beam. Workers, guide vanes and other parts of the hot tract of gas turbine engines are operated at elevated temperatures, pressures and speeds. Significantly increase the life of such parts by applying heat-resistant coatings that protect the surface from high-temperature oxidation, erosion, and softening of the base material. The plasma coating consists of an intermetallic (β-phase) compound. A pulsed-periodic laser with pulse energy E = 5, 10, 15, and 30 J was used for thermal heating. Upon heating, surface melting of the fusible phases occurred and the integrity of the surface layer of the coating was violated. By changing the parameters of laser radiation, it is possible to carry out express diagnostics and comparative tests of coatings, as well as to predict their behavior in extreme conditions.
The influence of surface preparation methods on the adhesion of film antifriction coatings
Authors: Rodichev A Yu , Gorin A V , Kolpakova S V , Tokmakova M A
Published: December 2020

The article presents the equipment, methods and results of studies of the adhesion strength of a film anti-friction coating with a steel base. A multivariate experiment was performed. The factors and the significance level of each of them, affecting the strength of the antifriction film coating, are revealed. The dependence of the adhesion strength on the modes of applying the film coating is established and described. Recommendations have been developed on the choice and method of applying film anti-friction coatings for maintenance and repair of motor vehicles.
Agricultural materials based on eco-friendly polymers
Authors: Shibryaeva L S , Podzorova M V , Tertyshnaya Yu V , Chaplygin M E
Published: December 2020

The present article is concerned with materials based on polyhydroxybutyrate and polylactide as new materials for seed carriers, producing a stimulating effect on their germinating ability as well as the growth and development of plants. It has been established that the growth of wheat is fundamentally affected by the structure of these materials. The composition and chemistry of polymers determine a mechanism of its biodegradation in a biological environment. At the same time, the structure of polymers and polymer of composites determines the speed and affects the kinetics of processes. Thus, the use of the biodegradable polymers has a positive impact on both the growth of plants and the environment.
The choice of pulse laser radiation modes for hardening a metal cutting saw
Authors: Sergeev D G , Marinin E A , Marinina N I , Durseneva M D
Published: December 2020

Increasing production rates of parts, toughening of operation modes and load increasing, reduce the service life of equipment. The destruction of the tool usually begins with the surface, so its strengthening is one of the main factors of improving the resource and reliability. Hardening the working surfaces with laser radiation is the most effective and promising method of hardening tools that are used under friction conditions. This article presents the results of experimental study of the laser hardening process of a band saw made of 9CrV tool steel; a mathematical model based on these experiments was made to show the connection of the parameters of pulse laser radiation and the depth of the resulting hardened area. It shows that the pulse energy and the movement speed for pulse laser hardening with the chosen parameters have a decisive influence on the depth of the hardened area.
Theoretical methods for calculating the structure and properties of cast iron based on Fe-C-Al systems
Authors: Bikulov R A
Published: December 2020

The main factor preventing the widespread introduction of Fe-C-Al system cast iron is the mismatch of the cast iron structure with the operating conditions. At the same time, there is no sufficiently simple and reliable technique in the literature for calculating the structure of iron of the Fe-C-Al system, taking into account both kinetic and thermodynamic factors and operating conditions. Theoretical methods of determination of structure and properties of cast iron of Fe-C-Al system are proposed on the basis of thermodynamic, kinetic analyses, as well as metallographic and X-ray phase investigations in relation to operating conditions.
Improving the heat insulation efficiency of the blast furnace tuyere
Authors: Tarasov Yu S , Kobelev O A , Sayfullayev S D
Published: December 2020

A proposed method to increase the service life of the heat-insulating insert in the air passage of the blast furnace tuyere suggested gluing heat-resistant siliceous fabric onto its outer surface, and to reduce heat loss and increase the tuyere resistance to burnout, fixing a ceramic disk to the end of the tuyere’s nose. The necessity of measures to increase the service life of a heat-insulating insert in the tuyere was justified by simulating its stress state in Ansys. The use of heat-resistant siliceous fabric on the entire outer surface of the insert allowed a more than twofold increase in the insert’s service life compared to the option when the fabric was glued to the insert part from the flange to the gas pipe. Using simulation of the tuyere’s thermal state in a DEFORM–2D environment and industrial experiments, the possibility of reducing heat loss and protecting the tuyere from burnout by thermal insulation of the end of its nose using a ceramic disk is shown.
Influence of the composition and synthesis technology on the structure of syntactic carbon foams
Authors: Galimov E R , Fedyaev V L , Shibaev P B , Samoylov V M
Published: December 2020

The paper shows the influence of the composition and synthesis technology on the structure of syntactic carbon foams. It studies the foam technologies using carbon microballoons and phenol formaldehyde resin, and pitch carbonization under pressure. It reveals the influence of added mesophase microballoons in the starting pitch on the formation of a porous structure of syntactic carbon foams. It shows the macropore size distribution in carbon foams made by industrial carbonization under pressure.
Method for production carbon plastics with multifunctional properties
Authors: Nelyub V
Published: December 2020

The technology of metal coating of carbon tapes and fabrics, consisting of two technological operations: activation and deposition, is considered. To perform the process of activating the surface of carbon tapes and fabrics, UPM-500 plasma activation device at a low-temperature and plasma air were used. A laboratory magnetron sputter MIR-2 was used for applying metal coatings by magnetron sputtering. The diagram of the formation of metal coatings on plain carbon fiber, taking into account its structure, is given. The study provides the results of determining the carbon plastics interlayer shear strength manufactured using vacuum infusion method, which vary in the structure of the reinforcing filler, the metal coating type and the composition of the epoxy binder. It is shown that the composition of the binder, the reinforcing material and the type of coating equally play a significant role in the shear strength of carbon plastics.
Foam Glass Based on Russian Far East Raw Materials and its Use in Mechanical Engineering
Authors: Yatsenko E A , Smoliy V A , Goltsman B M , Golovko D A
Published: December 2020

The necessity of developing a technology for the synthesis of foam glass based on Russian Far East local raw materials is substantiated for its use as thermal insulation of oil pipelines. A powder technology using the hydrate method was developed for the production of foam glass based on diatomite from the Chernoyarskoe deposit. The results of experimental studies of the synthesized foam glass properties were presented. The effectiveness of its use as thermal insulation of oil pipelines in harsh climatic conditions of the Russian Far East was proved.
Synthesis of Control Systems for Complex Technical Objects
Authors: Abidova E A , Dembitsky A E , Lapkis A A , Chernov A V
Published: December 2020

The paper considers the task of improving the reliability of standby diesel generator sets of nuclear power plants (NPP) of the Russian Federation. A solution to the problem using a portable software and hardware diagnostic complex (I&C complex) that provides registration, processing, analysis and storage of data is proposed. The article describes in detail the main provisions of the methodology to monitor the state of the object. A method of analyzing the state of a diesel generator unit (DGU) based on representing an array of vibration and ultrasound parameters in the space of the principal components is used. The results of I&C complex tests for the diagnostics of NPP DGU are presented. An assessment of the resource of equipment based on the results of diagnostics for risk management, improving equipment reliability and cost savings is proposed. Haчните свою аннотацию здесь…
CAD-technologies in archaeological reconstructions: scientific and educational experience of Vyatka State University
Authors: Trushkova I Yu , Grachev S P , Flaksman A L , Prigarin A A
Published: December 2020

Russian regional scientific schools demonstrate examples of applied research at the frontier of sciences, including a combination of accurate / engineering and archaeological research. Vyatka State University has gained some experience in such cooperation. Sources for this work are the archaeological collections of the village. Lalsk, research methods and techniques - archaeological techniques and digital technology. Using digital processing of collections and other archaeological excavations as an example in the northern Vyatka borderlands, computer applications for theoretical analysis of archaeological artifacts and the application of its results are shown. The article presents the algorithms for using digital software. Certain technologies make it possible to reconstruct old household items from fragments, form collections of 3D models, and copy objects with a complex relief or artistic value to preserve the originals. It is indicative of compiling a relief and multidimensional copy of the excavation site, a databank of archaeological objects and some related information. The features of building a virtual archaeological museum and its use by different target groups of the region are outlined - by age and social affiliation. The traditional spheres of using the obtained results — science and education — have been significantly expanded at the expense of cultural, tourism, cadastral and urban planning institutions, and law enforcement agencies. The directions of development of museum and engineering pedagogy are outlined. Digital technologies in archeology allow them to be applied remotely, remotely to small and medium-sized businesses, and to increase the quality of life in the region.
A mathematical model for the selection of visualization system components in training complexes
Authors: Dedov Denis , Arkhipov Alexey , Sidorchuk Alexander
Published: December 2020

The task of choosing the components of the visualization system for training complexes is currently being solved on the basis of expert analysis of existing equipment and technical requirements. The expert approach does not allow to automate the process of selecting components. Therefore, the urgent task is to develop a method that allows for automated decision support for the selection of visualization system components. To solve it, a mathematical model based on the use of the apparatus of the theory of sets and graphs was developed in the framework of this study. The mathematical model includes the calculation of a set of criteria to evaluate the components of the visualization system, to increase the objectivity of their choice.
Reliability analysis of technological cell with start-up device
Authors: Glech Sergey G , Obzherin Yuriy E , Fedorenko Sergey N
Published: December 2020

An important factor affecting the efficiency and reliability of technological systems is the reliability of their start-up device. In the work, a semi-Markov model of the functioning of the technological cell is built taking into account the start-up device. The analysis of the influence of the reliability of the start-up device on the reliability of the technological cell.
Information model of production and logistics systems of machine-building enterprises as the basis for the development and maintenance of their digital twins
Authors: Grigoriev S N , Dolgov V A , Nikishechkin P A , Dolgov N V
Published: December 2020

The aims and tasks of the creating of digital twins of objects and processes have been considered. The aims and tasks of the development of the digital twin of the production and logistic system of the machine-building enterprise have been formulated. The structural model of the production and logistics system of digital twin has been offered and the data structure of the information model of the production and logistic system has been developed.
Active cooling systems for the hot zone of heat engines
Authors: Smolentsev Vladislav , Gritsuk Vasiliy , Mandrykin Andrei
Published: December 2020

Various types of hot zone cooling systems for liquid rocket engines are considered. The analysis of systems for external and internal cooling of the hot zone of the combustion chamber and the jet co-PLA is performed. The area of primary use of external and internal impact of components on the combustion chamber and the jet nozzle of a temporary product with a high thermal load on the material is given. Recommendations on the choice of technological methods for processing heat-protective coatings were developed, where the advantages of combined electroabrasive treatment were revealed. In this case, the possibility of finishing the transition sections of the path from areas that are difficult to access for the tool, which have coatings with ceramic granules that have been used in the latest products of aerospace technology, is shown. The mechanism of heat transfer by the cooling medium from the areas of the greatest heating, as a rule, to the flow of the liquid fuel component of the fuel is shown. Examples of implementation of modern cooling systems on typical designs of combustion chambers of modern rocket engines are considered. It is shown that the cooling efficiency will be higher the more belts of the cooling medium curtain are located along the length of the combustion chamber. At the same time, it should be taken into account that the use of an excessively large number of belts means a significant complication of the camera design, its manufacturing technology, and an increase in the cost of the product.
Longitudinal Impact of Straight Rod against Elastic Support
Authors: Zhernakov V S , Pavlov V P , Kudoyarova V M
Published: December 2020

The paper implements a series method for numerical analyze a stress state of a straight rod in the process of its longitudinal impact on an elastic support at a given initial free rod movement before its impact with a given speed. The problem solution is based on the entering a displacement function in trigonometric series. As a method implementation result, a computer program was created that allows multivariate calculations to be performed with high accuracy and the results output in a clear graphic form.
Development and research of elastic-damping device with variable stiffness
Authors: Kuznetsov N K , Iov I A , Iov A A , Dolgih E S
Published: December 2020

The article is devoted to the reduction of dynamic loads of actuating mechanisms of mining machines based on the use of elastic-damping devices with variable parameters built into the construction of these machines. It is shown that the determination of the parameters of these devices can be represented as a solution of the inverse dynamic problem based on a differential equation with variable coefficients. Using the example of a damping device proposed for reducing the dynamic loads of the digging mechanism of dragline ES 20.90, we describe the procedure for constructing the desired differential equation for synthesizing the device parameters and present the results of a numerical study of its effectiveness.
Modeling elastic deformations of the rotary dividing table faceplate under the action of the workpiece weight
Authors: Tsarfin B A
Published: December 2020

The article discusses the problem of determining elastic deformations of the rotary indexing table faceplate that arise when installing maximum allowable weight workpiece. A numerical analysis of the stress-strain state of the faceplate under loading with the same weight of its different sections consisting of concentric zones into which the faceplates was conditionally divided was performed. It has been established that the deformations under study can have a significant effect on the accuracy of the workpiece base. All calculations were performed in the CAE ANSYS finite element modeling software package. Based on the calculation results, the proposal was developed to modernize the design of the faceplate, which reduces elastic deformations.
Modeling maintenance of the machine-building complex
Authors: Lvovich I Ya , Lvovich Ya E , Preobrazhenskiy A P , Choporov O N
Published: December 2020

The problems associated with the modeling maintenance of the machine-building complex are considered. The forecasting technique for components based on one attribute in the framework of experiment is shown. The criterion is considered in terms of risk assessment for the consumer. The results of modeling of the main parameters characterizing the quality of electrolytic capacitors is demonstrated. After the tests are completed, the value of the predicted parameter will be determined for each of the implementations. The optimal value of the leakage current, which ensures the minimum probability of error, for tantalum electrolytic capacitors with a nominal capacitance is shown. The research results may be useful for specialists working in engineering complexes.
The issue of low resistance of punches when heading of sunk screw made of ferrite-pearlite steels
Authors: Galkin V V , Gavrilov G N , Ivanov S V , Bratuknin A V
Published: December 2020

The causes are investigated and the types of punches wear during extrusion of a cruciform slot in screws with countersunk head from ferritic-pearlite class steels, in particular, 16KhSN steel, are evaluated. The research methodology included two simulations of the M5 screw landing process using the DEFORM-3D software package. In the first simulation, using a generalized curve of the hardening of the material of the deformable workpiece, its stress state on the contact surface with the punch is determined. The obtained values were set in the form of a load on the punch when determining its stress state. The second simulation was carried out using the hardening curve of the punch material. The information obtained on the magnitude and distribution of stresses in the forming profile of the punch made it possible to draw a conclusion about the types of wear that are defined as loss of profile geometry and fatigue failure.
Analysis of engineering mechanics problems solved by descriptive geometry methods
Authors: Nazarova Olga , Chikhranov Aleksey , Dolzhenko Yana , Shagarova Anna
Published: December 2020

The article shows the possibility of using descriptive geometry methods for solving problems of theoretical mechanics. The solution of problems of mechanics associated with the analysis of plane and spatial systems of forces is considered. The graphic solution of problems was carried out using the image of force vectors using orthogonal projections. A comparison of the results of graphical constructions with an analytical solution is presented.
Improving the pneumatic actuator of the locomotive sand feeding system by increasing the outlet flow velocity
Authors: Bulavin Y P , Konovalov P Y , Volkov I V , Bessarabova O N
Published: December 2020

During the study, the main characteristics and parameters of the gas jet injector of the pneumatic actuator for the locomotive sand feeding system were calculated based on the specified input and output values of gas flows. The process of ejecting an additional volume of ambient air in order to increase the outlet flow velocity of the air-sand mixture from the outlet pipe of the locomotive sand feeding system was simulated by means of the FlowSimulation package tools of the SolidWorks CFD software for solid modeling. The reduction in the compressed air consumption relative to the standard locomotive sand feeding systems has been achieved.
Reliability assessment of the stepless rotation mechanism of an industrial tractor with a tracking control system
Authors: Pavlovskaya O O , Zemlyansky Yu M , Kondakov S V , Podzhivotova I A
Published: December 2020

The authors of the article assess the reliability and durability of a stepless turning mechanism of a 10-ton industrial tractor with a tracking control system at the stage of projecting.
Modeling and testing of control system for an underwater dual-arm robot
Authors: Kramar V , Kabanov A , Kramar O , Putin A
Published: December 2020

The article exams the approach to testing the software of the control system for an underwater dual-arm robot. The proposed approaches are related both to the modeling of robot computer models in Matlab, to testing the control system software by a dual-arm robot simulator and to testing software by the real robot. The proposed testing approach made it possible to verify the correctness of the developed control system software by evaluating parameters such as accuracy and repeatability. An example of a test procedure using the robot simulator is given.
Production process improvement of manufacture by generation efficient control-and-measuring tool’s kit
Authors: Reshetnikova E , Bochkarev P Ju
Published: December 2020

Machine building manufactories ensures competitiveness if they use innovation methods of their organization. Authors of article proposed innovation methods of preproduction engineering based on control-and-measuring procedures complex. Complex of control-and-measuring procedures is implemented by system of computer-aided planning multiproduct technologic process (SCAPMTP). SCAPMTP was created by D.Sc. (Engineering), Professor Bochkarev P. Yu. Subsystem of the generation of the reasonable control-and-measuring kit procedure is one of the main parts of the control-and-measuring procedures complex. This subsystem allowed cutting time for technological process details manufacturing.
Improving the quality of planning due to automated generation of a normative card based on digital technological processes
Authors: Sidorova A I , Zheleznov O V , Polyanskov Yu V , Pavlov P Yu
Published: December 2020

Improving the quality of planning is one of the main problems of any multinomenclature enterprise. This article discusses the development of models for an automated calculation of time standards, which are necessary not only for an accurate regulation of digital technological process operations, but also for the correct maintenance of production normative cards. Parameters for the automated generation of a normative card are determined, which are used for accurate planning of the main production capacities of the enterprise. An algorithm for obtaining planned operational labor intensity based on the digital technological process of an aircraft building enterprise is developed.
Centralized procurement as a financing tool for innovation and technology entrepreneurship
Authors: Gamberg A E , Dashkova T E , Ershov I V , Vernova T N
Published: December 2020

This article proposes a model of phased financing of innovative projects implemented by small enterprises to market, using the internal “fundraising” of such companies, by participating in centralized procurement procedures under 44-Ф3 and 223-Ф3. The risks of applying such a model of project financing are assessed and the types of procurement procedures are compared with the current legislation of Russia in this area.
Optimization of the production plan taking according to the customers’ strategic importance
Authors: Baranchikova S G , Ershova I V , Klyuev A V , Cherepanova E V
Published: December 2020

The article is devoted to the management of the production plan of the industrial enterprise. Existing approaches to optimization of the production plan are focused mainly on stochastic demand and consider the process of production plan formation. At the same time, many modern industrial enterprises often deal with rush orders in the course of their work. They have to solve the task of changing the formed production plan. If resources are limited, the decision to include an urgent order may result in a failure or a change in the due date of the orders included in the plan. In this regard, it becomes important to take into account the strategic importance of clients to the enterprise. The article proposes a methodological approach to the issue of inclusion or non-inclusion of rush order in the already formed and accepted production plan. The authors have developed a mathematical model of optimization of the formed production plan with the participation of rush order. The model uses Boolean variables to decide whether to include or refuse an order and an additional factor to increase margin income from the order for strategic customers.
Improve business process efficiency by value engineering
Authors: Mineeva T A , Kuznetcova N A , Norkina O S , Popova E V
Published: December 2020

This article is devoted to the problems of business processes optimization by value engineering (FCA) method. The business processes analysis is particularly relevant in modern conditions. The purpose the investigation is to adapt the value engineering to the business process. The FCA is a universal and highly efficient method of parameters optimization and other structural, technological, organizational, economic characteristics of a product, work or services. The hypothesis of the applying a value engineering to a business process possibility is considered. The article discusses FCA tools as an example of a metal rolling business delivery process. A business process model is being constructed as an object structural element model. The functions decomposition is carried out. Functions are classified into basic and auxiliary on the basis of the level. In the article the significance and functional costs are determined. A functional-cost diagram is constructed to identify the functions with the most deviations needing improvement. The FCA stages are accompanied by graphical illustrations, tables that illustrate the logic of applying the method to the business process. As a result, an optimal business-process concept with the lowest cost is being developed.
Structural and mathematical models of software and hardware platform of the training complex
Authors: Obukhov Artem , Siukhin Alexandr , Dedov Denis
Published: December 2020

The article discusses the problem of formalizing the structure of software and hardware platform training complex based on a controlled treadmill. The general structure of the platform components is formulated. A mathematical model is developed for an omnidirectional platform in notation of set theory. The criteria for optimizing the software and hardware platform were selected: economic costs, compliance with structural characteristics, energy efficiency; quality indicators. Structural and mathematical models and criteria will allow the design and optimization of the hardware and software platform for the training complex.
Gas-dynamic spraying, as a method of the component recovery in the power engineering industry
Authors: Krivina L A , Tarasenko Y P , Levanov Y K , Kirikov S V
Published: December 2020

The purpose of the study is to decide on the possible protective coating formation of “Ni-Al” system by applying the method of cold gas-dynamic powder spraying with “Dimet-403” unit. The phase composition, microstructure and mechanical characteristics of the coating after spraying and subsequent heat treatment have been investigated. The developed coating can be used for protection against high-temperature gas-phase corrosion of internal surfaces of working blades of gas turbine engines during their manufacture or repair.
Integration of descriptions of infological model representations at automation of design tasks
Authors: Novoselova O V , Sidorov A S
Published: December 2020

This paper investigates integrating model representation descriptions in the form of charts and specifications at the stage of automated systems infological modeling, developed in order to solve design tasks on the methodology for automating intellectual labor (MAIL). In the process of creating the automated system on the basis of MAIL there were developed the following model representations of design tasks: initial, conceptual, infological and datalogical. The description of infological model representation includes the following forms (specifications) and charts: for a static component – P1 and P2, the chart of infological structure; for a dynamic component – P3 and P4, the chart depicting a system of subject accesses; for a functional component – P5 and P6, the chart depicting a system of subject manipulations; P8 and the matrix chart showing the model as a whole including static, functional and dynamic components coordination. There was investigated the process creating charts and specifications as a basis of the method and technique to integrate descriptions of dynamic, functional and static components for the models of automated systems that perform design tasks in the design of mechanical engineering objects. Integrating descriptions in the form of charts and specifications for functional components of infological model representations is given in this paper.
Routing of fluidic circuits using skeletons of polygonal figures
Authors: Romakin V A
Published: December 2020

Routing of channels between elementary fluidic elements is an important stage in the design of new fluidic devices. This paper considers usage skeletons of polygonal figures in constructing a topological model of channels of fluidic devices.
Modernization of an industrial passive exoskeleton prototype for lower extremities using rapid prototyping technologies
Authors: Karfidova A O , Vasilyev M V , Morozova I G
Published: December 2020

The work is devoted to an urgent problem: increasing the efficiency of exoskeleton design. Such devices are needed to perform work that requires high physical activity in various production processes [1-18]. Currently, there are no industrial exoskeleton designs that meet the needs of customers [19-30]. To determine the effective design option, analogues of foreign and domestic markets are studied [31-33]. Based on a comparative analysis of characteristics, it is revealed that the Russian exoskeleton developed by Karfidov Lab LTD. [34] has the highest performance in comparison with competitors. However, this design lacks a convenient system for fixing the saddle to support the user, and the exoskeleton has a large weight - 6 kg. As a result of the work performed, some modernization is proposed, taking into account the solution of problems. For this, a solid 3D-model in the SolidWorks environment and design documentation for exoskeleton production are developed. To reduce the exoskeleton weight, it is decided to use plastic parts. Support for the user’s body is provided, made in the form of a vest, as well as fixation system in the form of belts located on the foot, lower leg and thigh. It is decided to install a gas spring from the manufacturer Suspa, model Varilock EL2-111-79- 600N, which enables to increase the shock absorption when the exoskeleton is active. To increase the strength of plastic parts, a reinforcement method is used. A saddle is introduced that provides a soft contact between the user and the system in the active and passive positions of the exoskeleton.
Methods and means of concentrated fertilizers application
Authors: Belousov Sergey V , Khanin Yuri V , Zhadko Valeriia V
Published: December 2020

The paper shows the methods and means of concentrated fertilizers application. The article has an analytical character, which is expressed in the analysis of methods and units of mechanization for applying concentrated fertilizers, as well as excerpts from the works of leading scientists on the subject under study. The main trend in the development of means for the use of liquid concentrated fertilizers is determined, and the issues of improving the quality parameters of their work are shown. The technology of using liquid fertilizers and the development of mechanization units for fertilization is also justified. The conclusions present the main results achieved so far and the prospects of the development of this area.
Collective transport as a tool to reduce congestion – case study
Authors: Midor Katarzyna , Biały Witold , Ivanova T N
Published: December 2020

In view of the increase in population’ wealth and thus in the quality of life, the number of individual transport means is increasing significantly. Today’s society values comfort and freedom of movement, and consequently is not willing to use public transport on a mass scale, which always entails certain restrictions. However, in a situation of recurring congestion, especially in urban and industrialized areas, as well as increasing air pollution caused by emissions of harmful substances from the combustion of oil-based fuels, it is necessary to ask a question whether we should not seek solutions that would significantly reduce these phenomena. One such measure is the organization of collective transport by companies as an alternative to individual employee commuting. This paper presents the research results that show in a selected area of the Silesian agglomeration on what scale the collective transport organized by the company influences the local congestion and emission of harmful substances into the air.