scholarly journals Model of simulation of the process of formation of functional surfaces of micro-opto-electro-mechanical systems’ components

2020 ◽  
pp. 73-82
Author(s):  
І.Ш. Невлюдов ◽  
О.О. Чала ◽  
О.І. Филипенко ◽  
І.В. Боцман
Keyword(s):  
Mathematical Model ◽  
Technological Process ◽  
Mechanical Systems ◽  
Experiment Planning ◽  
Practical Implementation ◽  
Technological Parameters ◽  
Forming Process ◽  
Technological Processes ◽  
Functional Surfaces ◽  
Functional Components

The subject of the article is to establish the relationships between the parameters of formation the functional surfaces of the substrates of micro-opto-electro-mechanical systems’ (MOEMS) components and their physical and technological parameters. Objectives: to increase the reliability and reproducibility of the received information, reduce the complexity of the technological process of forming, by modeling the dependences of the ratios of physical and technological parameters of forming the functional surfaces of the substrates of MOEMS components for the forming process. The methods are used: methods of experiment planning and computer processing of experimental data, mathematical models, digital computer modeling of technological processes. The following results were obtained: a mathematical model was proposed, which was used to model the influence of physical and technological parameters of the functional surfaces of the substrates of MOEMS components on their formation, with the receipt of prototypes. The results can be used in the development of technological processes of production, as substrates of functional components of MOEMS, and other functional elements for various technological purposes. A mathematical model is obtained, which allows predicting the degree of influence of physical and technological parameters of the technological process on the parameters of formation of functional surfaces of substrates of MOEMS components. Conclusions. The scientific novelty of the results is as follows: a mathematical model that has found practical implementation for computer digital modeling in the development of technological processes for the production of functional surfaces of substrates of MOEMS components is proposed, in which, unlike the existing ones, it is possible to predict the degree of influence of physical substrates of MOEMS components, which allows to plan the process of formation, increase the reproducibility of results and reduce the complexity of the technological process.

Classification of mathematical models of technological design

2021 ◽  
pp. 68-71
Author(s):  
Keyword(s):  
Mathematical Model ◽  
Mathematical Models ◽  
Technological Process ◽  
Process Design ◽  
Geometric Parameters ◽  
Technological Design ◽  
Technological Processes ◽  
Technological Preparation

The use of mathematical models is of great importance for the automation of the design of technological processes. Representation of the geometric parameters of the part in the form of mathematical models allows automating the development of the structure and calculation of the parameters of the technological process, which is important for the complete digitalization of the technological preparation of production. Keywords: technological process, design, mathematical model, digitalization. [email protected]

The Mathematical Model for the Generation of the Cylindrical Gear With Curved Cycloidal Teeth

2007 ◽  
Author(s):  
Iulian Stanasel ◽  
Adrian Ghionea ◽  
Ionut Ghionea ◽  
Petru Ungur ◽  
Oana Stanasel
Keyword(s):  
Mathematical Model ◽  
Production Costs ◽  
Reference Plane ◽  
Practical Implementation ◽  
Work Piece ◽  
Special Device ◽  
Technological Parameters ◽  
Cylindrical Gear ◽  
Processing Machine ◽  
The Mathematical Model

The performed studies regarding the cylindrical gears with curved teeth or in V showed that a uniform distribution of the load on the flanks is hard to realise, generally being necessary later finishing processing or modifying the gear by camber or flanking, which suppose supplementary expenses. On the basis of these mentions and taking into account the advantages of curved bevel gear, the purpose of this paper is to present an original study regarding the mathematical model for generation of a curved cylindrical gear with high performances. The cycloidal gear was chosen after a technical and an economical study regarding on the possibility of practical implementation with the lowest production costs using a special device, adapted on a Phauter processing machine of cylindrical gear. This was the main reason for choosing a cycloidal profile from several types of curved teeth (cycloidal arc, circle arc, Archimede’s spiral, involute arc). So, the main aim of the paper is to determine the equations of the flanks of cylindrical wheel with curved teeth in oblong cycloidal arc, in order to establish if the technical generation is possible. The curved cylindrical teeth with cycloidal flanks is generated by rolling with straight mobile line and continuous division by using a milling cutter with 1, 2, 3, 6 groups of knifes equidistantly placed, fixed on an adaptable device on a Phauter processing machine. The two curves which define the flank are simultaneously generated by correlated motions, and the flanks of the wheel part result as a roll of successive positions of generating hook materialized by the cutting edge of the tool. The shape of the contact curve between the conjugated surfaces of generating element and the wheel part can be obtained if you are taking into account the kinematic condition. Using this condition you can determine the relationship between the kinematic, geometric and technological parameters. The line of the flanks is studied in the reference plane and in parallel planes with this, and the profile of the flanks is determined in perpendicular planes on the work piece axis. Based on the parametric equations it was made the simulation program in MATLAB that indicates that this gears can be obtained, and constitutes the first step in practical manufacturing of this kind of gears. By analyzing the obtained shape they result useful conclusions for the manufacturing of the involute-tooth gear with curved oblong cycloidal arc. On the other hand, using Solid Edge it was made the spatial modeling of the cylindrical gear with curved cycloidal teeth that allows next FEA studies regarding on the contact and bending stress.

Application of System Analysis for Technological Processes Investigation

2020 ◽  
Vol 834 ◽  
pp. 24-31
Author(s):  
Marina Polyakova ◽  
Elena Shiriaeva ◽  
Milyausha Iansaitova
Keyword(s):  
Technological Process ◽  
Hot Rolling ◽  
System Analysis ◽  
Rolling Process ◽  
Geometrical Parameters ◽  
Coating Process ◽  
Technological Parameters ◽  
Rolling Operation ◽  
Technological Processes ◽  
Input And Output

System analysis is used as the effective way for design and modification of different kinds of technical systems. Application of system analysis to any technological process allows to present the links between input and output parameters which makes it possible to analyze its effectiveness and effect on the process for manufacturing of the object with necessary level of quality. The paper presents results of system analysis application for multioperational technological processes. The main aim of hot rolling process is manufacturing the hot rolled metal sheet with definite geometrical parameters which are necessary for further cold rolling process. The scheme of hot rolling operation with its input and output links is presented. The obtained results can be used for mathematical modeling of hot rolling operation. It is shown the application of system analysis for technological process of coating on the example of vacuum ion-plasma coating process. Because of existence of operated, noncontrolled, and indignant parameters of the coating process application of system analysis is the effective way for structural analysis of this technical system. It is proposed to supplement system analysis with function-oriented analysis. This approach can state the links between properties of the object which are sufficient for its application and technological parameters of the manufacturing technological process.

scholarly journals Creation of automated workplaces based on a formalized methodology for designing technological processes of machine-building enterprises

2020 ◽  
pp. 214-223
Author(s):  
Г.С. Жетесова ◽  
Т.Ю. Никонова ◽  
В.В. Юрченко ◽  
А.К. Матешов ◽  
Н.А. Савельева
Keyword(s):  
Technological Process ◽  
Machine Building ◽  
Practical Significance ◽  
Technological Parameters ◽  
Special Equipment ◽  
Technological Processes ◽  
Process Formation ◽  
Technical Specifications ◽  
Current Transition ◽  
Building Enterprises

В статье рассматривается проблема создания автоматизированных систем, удовлетворяющих требованиям современного производства (универсальность, многофункциональность и комплексность), прежде всего, должны быть созданы специальные методология и теория, раскрывающие процессы проектирования, представляемые в математическом, формализованном и программном виде. Авторами предлагается формализация процесса проектирования и технологии, на основе которой создана система автоматизации проектирования, что позволит проектировать технологические процессы (ТП) для разнообразных изделий, в том числе ранее не производившихся. Разработка математических моделей ТП механической обработки деталей обеспечит объективное принятие технологических решений и будет отражать динамику качественного и количественного преобразования заготовок в процессе производства. Практической значимостью работы является создание и апробация ПО «Система автоматизированных рабочих мест машиностроительных предприятий», в которой разработаны АРМ технологических служб и подразделений, а именно АРМ отдела технолога. Для реализации цели, разработанный АРМ обеспечивает выполнение двух основных направлений деятельности. Во-первых, обеспечивает возможность разработки и внедрения ТП, средств автоматизации и механизации, оптимизации режимов работы универсального оборудования, и оборудования с числовым программным управлением. Во-вторых, реализует своевременную разработку технических заданий для обеспечения структурных подразделений (цехов, участков) специальной оснасткой, инструментом и приспособлениями, предусмотренными технологией, нестандартным оборудованием средствами автоматизации и механизации. В результате проведенных исследований, получены: 1. Методика проектирования основных этапов ТП изготовления деталей, основанная на объективных критериях выбора технологических параметров, что обеспечит исключение ошибок на начальном этапе. Разработан общий алгоритм решения технологической задачи. 2. Методика назначения переходов и составления планов обработки, в основу которой положен принцип выполнимости определенным методом текущего перехода, а именно, выполнение характеристик. 3. Методика оснащения ТП позволяет учитывать геометрические и точностные параметры, дополнительные требования к поверхности на конкретных стадиях с учетом текущей производственной ситуации. The problem of development special software for the automation for design of technological processes that meets the requirements of modern production – universality, multifunctionality and complexity are considered. The authors propose – CAD is developed, which will make it possible to design technological processes for a wide variety of products, including new ones that have not previously entered production. The practical significance of the work is the creation and testing of the software «System of automated workstations of machine-building enterprises», in AWP of the technologist's department, were developed. The first direction provides the possibility of developing and implementing processes. The second the timely development of technical specifications for the provision of structural units (workshops and sections) with special equipment, tools and devices provided for by technology. As a result of the research, the methods of designing technological processes for machining parts were obtained: 1. Methodology for designing the main stages based on objective criteria for the selection of technological parameters, which ensures the elimination of errors at the initial stage of the technological process formation 2. The method of assigning transitions and drawing up processing plans, based on the principle of the feasibility of the current transition by a certain method, namely, the fulfillment of the characteristics that need to be obtained at the current transition. 3. The technique of equipping the technological process allows taking into account the geometric and precision parameters, additional requirements for the surface at specific stages based on the current production situation.

Construction of mathematical models of technological processes based on theory of sets

2021 ◽  
pp. 48-50
Author(s):  
S.Yu. Kalyakulin ◽  
E.V. Mitin ◽  
Sul'din S.P.
Keyword(s):  
Mathematical Model ◽  
Mathematical Models ◽  
Technological Process ◽  
Technological Processes

An approach to the construction of mathematical models of technological processes based on theory of sets is considered. Keywords: structure, isomorphism, mathematical model, technological process, connections, technology. [email protected]

scholarly journals MATHEMATICAL MODELING IN THE STUDY OF ROUGHNESS AS APPLIED TO INTERNAL SURFACES

2019 ◽  
pp. 27-33
Author(s):  
Edward Zagidinovich Batmanov ◽  
Vladimir Pavlovich Bulgakov ◽  
Rasul Vagidovich Guseinov
Keyword(s):  
Mathematical Modeling ◽  
Mathematical Model ◽  
Surface Roughness ◽  
Metal Cutting ◽  
Roughness Parameter ◽  
Experiment Planning ◽  
Internal Thread ◽  
Mold Surface ◽  
Technological Parameters ◽  
Internal Surfaces

The article considers the problems of mathematical modeling roughness of surfaces obtained in the cutting process. Roughness is related with the technological parameters of the system “machine-fixture-tool-workpiece” and the problem of fine finish of internal threads. There have been analyzed the existing mathematical models of finished surface roughness and stated the need to develop a mathematical model of internal surface roughness. There has been worked out a mathematical model of threaded profile roughness of the internal thread made by the tap in the details made from high-strength corrosion-resistant DI-8 grade steel that is popular in ship equipment building, by using methods of planning experiments. Geometric parameters of the tap cutting part have been taken as independent: angle of the intake cone, face and rear grinding angles. There have been listed parameters for qualitative evaluating and rating sharpened surfaces that are given in GOST 2789-73: altitudinal, step, profile bearing surface parameters. A mean-square deviation of microroughness profile was suggested to use as a roughness parameter. Impression method was used to evaluate roughness, light section device МИС-11 of V.P. Linnik was used to measure mold surface roughness. The method of planning experiments of predicting the roughness of internal surfaces has been found efficient. Theoretical studies are based on metal cutting methods, as well on methods of experiment planning with application of regression analysis; experimental research was conducted under laboratory conditions by using a computation machine. The research results allow to greatly improve the surface finish technologies in shipbuilding.

МODERNIZATION TECHNOLOGY REPAIRING ACENTRIFUGAL WATER PUMP

2018 ◽  
pp. 48-51
Author(s):  
Sh.U. Yuldashev ◽  
D.T. Abdumuminova
Keyword(s):  
Production Process ◽  
Technological Process ◽  
Energy Efficient ◽  
Technical Support ◽  
Ultrasonic Processing ◽  
Water Pump ◽  
The Real ◽  
Technological Processes ◽  
Efficient Management ◽  
Pump Shaft

The article provides an overview of the principle of the pump D630-90, as well as methods for studying the real conditions of technical support to improve maintainability and optimize technological processes and systems. A technological process for the restoration of the shaft of a centrifugal water pump has been developed and an algorithm for managing it has been proposed, on the basis of which the system for energy-efficient management of the recovery area has been implemented. Also in the article some questions of use, metal-filled compound SK812, and also application of ultrasonic processing of a surface of a shaft of the centrifugal water pump of mark D630-90 are mentioned and considered. The developed technological process of pump shaft restoration showed that it is characterized by simplicity, it fits well into the production process of repair and can be widely used in repair shops.

Mathematical model for combined extrusion of bar stock into cylindrical die by fl at working surface punch

2020 ◽  
pp. 309-312
Author(s):  
S.N. Larin S.N. ◽  
V.I. Tregubov ◽  
A.N. Isaeva
Keyword(s):  
Mathematical Model ◽  
Extrusion Force ◽  
Technological Parameters ◽  
Thin Walls ◽  
Working Surface ◽  
Industrial Implementation ◽  
Pressure Estimation

Combined extrusion processes can be in demand in the production of body products with jumper in the central part and thin walls. Often, their industrial implementation requires theoretical justifi cation of power regimes. Mathematical model of combined extrusion created on the basis of the upper estimates method is presented. The effect of technological parameters on extrusion force is established based on the obtained expressions for pressure estimation.

scholarly journals Cold Forging Effect on the Microstructure of Motorbike Shock Absorbers Fabricated by Tube Forming in a Closed Die

2021 ◽  
Vol 11 (5) ◽  
pp. 2142
Author(s):  
Trung-Kien Le ◽  
Tuan-Anh Bui
Keyword(s):  
Material Flow ◽  
Cold Forging ◽  
Technological Parameters ◽  
Forming Process ◽  
Tube Forming ◽  
Shock Absorbers ◽  
Thin Walled Tube ◽  
Thin Walled ◽  
Quality Of Products ◽  
Forming Defects

Motorbike shock absorbers made with a closed die employ a tube-forming process that is more sensitive than that of a solid billet, because the tube is usually too thin-walled to conserve material. During tube forming, defects such as folding and cracking occur due to unstable tube forming and abnormal material flow. It is therefore essential to understand the relationship between the appearance of defects and the number of forming steps to optimize technological parameters. Based on both finite element method (FEM) simulations and microstructural observations, we demonstrate the important role of the number and methodology of the forming steps on the material flow, defects, and metal fiber anisotropy of motorbike shock absorbers formed from a thin-walled tube. We find limits of the thickness and height ratios of the tube that must be held in order to avoid defects. Our study provides an important guide to workpiece and processing design that can improve the forming quality of products using tube forming.

The Control of Vibration Transmissibility Using an Electrodynamic Actuator –Close-Loop Solution

2013 ◽  
Vol 436 ◽  
pp. 166-173
Author(s):  
A. Mihaela Mîţiu ◽  
Daniel Constantin Comeagă ◽  
Octavian G. Donţu
Keyword(s):  
Mathematical Model ◽  
Control System ◽  
Mechanical System ◽  
Closed Loop ◽  
Mechanical Systems ◽  
Vibration Transmissibility ◽  
Technical Solutions ◽  
The Mathematical Model

In this paper are presented some aspects of transmissibility control of mechanical systems with 1 DOF so that the effects of vibration on their action to be minimized. Some technical solutions that can be used for this purpose is analyzed. Starting from the mathematical model of an electro-mechanical system with 1 DOF, are identified the parameters which influence the effectiveness of the transmissibility control system using an electrodynamic actuator who work in "closed loop".

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