RADIAL EXTRUSION OF A PIPE BILLET WITH INTERNAL LEDGE. ACTUALITY AND STATEMENT OF PROBLEM

2021 ◽  
pp. 2-10
Author(s):  
A. L. Vorontsov ◽  
E. O. Reshchikov
Keyword(s):  
Complete System ◽  
Mathematical Problem ◽  
Geometrical Parameters ◽  
Technological Parameters

The actuality of the study is justified in order to determine the main technological parameters of process of radial expression of pipe billet with the internal ledge, necessary for successful designing this operation is proved. The solvable mechanical and mathematical problem is formulated and complete system of the necessary initial equations is given. The formulas connecting current geometrical parameters of extruded billet with size of working way of punch are received.

PUNCHING CUPS WITH BOTTOM FLANGE BY DIRECT EXTRUSION WITH COUNTER-PUNCH. ACTUALITY AND STATEMENT OF PROBLEM

2020 ◽  
pp. 2-9 ◽  
Author(s):  
A. L. Vorontsov ◽  
I. A. Nikiforov
Keyword(s):  
Complete System ◽  
Mathematical Problem ◽  
Bottom Flange ◽  
Technological Parameters ◽  
Direct Extrusion ◽  
Successful Design

The actuality of the study is justified in order to determine the main technological parameters of direct extrusion using the counter-punch necessary for the successful design of the process of punching cups with a flange in the bottom. The solvable mechanical and mathematical problem is formulated and complete system of the necessary initial equations is given.

scholarly journals Model of long-length part flattening by mobile local bend

2018 ◽  
Vol 2018 (6) ◽  
pp. 44-48
Author(s):  
Альберт Королев ◽  
Albert Korolev ◽  
Михаил Решетников ◽  
Mihail Reshetnikov ◽  
Сергей Савран ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Bending Moment ◽  
Energy Approach ◽  
Geometrical Parameters ◽  
Technological Parameters ◽  
Continuous Rotation ◽  
Cycle Loading ◽  
Uniform Area

In the paper there is described a method of flattening and stabilization of geometrical parameters of long-length parts. The method is based on the formation of a uniform area displacement of an elasto-plastic deformation formed by a bending moment at continuous rotation of a part which results in the occurrence of multi-cycle loading. Because of the action of controlled multi-cycle loading takes place an accumulation and further relaxation of inner stresses. The process of flattening and stabilization of geometrical parameters is described by a simulator showing a tie between geometrical, physic-mechanical and technological parameters. At the heart of a simulator is an energy approach to the description of an elasto-plastic deformation of a part at multi-cycle loading.

scholarly journals Ensuring the Reliability of Pneumatic Classification Process for Granular Material in a Rhomb-Shaped Apparatus

2019 ◽  
Vol 9 (8) ◽  
pp. 1604 ◽  
Author(s):  
Lytvynenko ◽  
Yukhymenko ◽  
Pavlenko ◽  
Pitel ◽  
Mizakova ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Granular Material ◽  
Fine Particles ◽  
Geometrical Parameters ◽  
Technological Parameters ◽  
Stationary Concentration ◽  
Working Space ◽  
Operating Process ◽  
Pneumatic Classification ◽  
Suspended Layer

This article is devoted to a detailed description of the developed physical model of the pneumatic classification process for detecting the rotating suspended layer and ensuring the frequency of loading and unloading of a pneumatic classifier. The related mathematical model is developed for estimating the non-stationary concentration of fine particles in a gas-dispersed flow with respect to time and height of the working space of the apparatus. The research is aimed at developing a pneumatic classification method for granular materials using a rhomb-shaped apparatus and ensuring the reliability of the operating process based on the influence of the flow on the granular material concentrations. The obtained experimental results allow evaluating the rational geometrical parameters of the working space in pneumatic granulators, as well as verifying the proposed mathematical model based on the implementation of the quasi-linear regression procedure. It is shown that the rhomb-shaped pneumatic classifier provides effective separation of granular material, reaching up to 95% of the target fraction. As a result, the proposed methodology can be implemented for optimizing geometrical profiles of pneumatic classifiers in terms of defining the required technological parameters of the pneumatic classification process.

ON THE EXPRESS ESTIMATION OF GEOMETRICAL PARAMETERS OF A HYDRAULIC FRACTURING CRACK FIXED ON A PROPPANT USING THE METHODS OF MATHEMATICAL MODELING

2020 ◽  
Vol 6 (3) ◽  
pp. 79-92
Author(s):  
Alexey S. Shlyapkin ◽  
Alexey V. Tatosov
Keyword(s):  
Mathematical Model ◽  
Hydraulic Fracturing ◽  
Rapid Assessment ◽  
Geometric Parameters ◽  
Engineering Practice ◽  
Geometrical Parameters ◽  
Technological Parameters ◽  
Additional Information ◽  
Software Products

Improving technologies and increasing the number of activities related to hydraulic fracturing increase the requirements for the speed and quality of engineering support. For hydraulic fracturing design, there are specialized software products-hydraulic fracturing simulators, which are based on mathematical models of various dimensions. Taking into account the influence of filtration leaks into the reservoir and the behavior of proppant particles in the crack largely determine the shape of the fracture crack. In the model representation, these factors are taken into account, but they need to be clarified in order to increase the quality of the forecast and estimate the productivity of the crack, which determines the relevance of this area of study. In this paper, we propose an analysis that allows us to quickly evaluate the geometric parameters of the crack when changing the technological parameters and properties of the fracture fluid. The presented mathematical model is based on a one-dimensional mathematical model in PKN representation (Perkins — Kern — Nordgren model). All calculations presented in this paper were performed using the certified TSH Frac software package designed for modeling the geometric parameters of hydraulic fracturing cracks. The results of the study can be used in engineering practice for rapid assessment of the geometric parameters of a hydraulic fracturing crack. Subsequent adjustment and adjustment of the model can be carried out when additional information is obtained during small-volume test uploads in the well under study.

Influence of Technological Parameters on Sheet Metal Punching Section Quality

2013 ◽  
Vol 734-737 ◽  
pp. 2488-2491
Author(s):  
Xian Chang Mao ◽  
Zheng Mei ◽  
Ren Yi Liu ◽  
Dai Song Luo
Keyword(s):  
Sheet Metal ◽  
Metal Cutting ◽  
Geometrical Parameters ◽  
Technological Parameters ◽  
Blank Holder ◽  
Current Trends ◽  
Jacking Force ◽  
Sheet Metal Cutting ◽  
Blanking Process

The section quality of sheet metal is influenced greatly by technological parameters during the blanking process, and it is valuable to research them. Base on the current trends and development of the sheet metal blanking, the technological parameters which influence the cutting face quality of blanking are introduced in detail, including blank holder force, Jacking force, mould structure and geometrical parameters, elastic medium, blanking speed, etc. The result shows that sheet metal cutting face quality of blanking can be improve effectively by reasonable parameters.

scholarly journals Study of the influence of the technological parameters on the weld quality using artificial neural networks

2018 ◽  
Vol 178 ◽  
pp. 03011
Author(s):  
Daniel-Constantin Anghel ◽  
Alexandru Ene
Keyword(s):  
Neural Network ◽  
Electric Arc ◽  
Geometrical Parameters ◽  
Mechanical Parameters ◽  
Weld Quality ◽  
Technological Parameters ◽  
Backpropagation Algorithm ◽  
Feed Forward Neural Network ◽  
Mechanical Process ◽  
Arc Voltage

This paper presents a study on the weld quality obtained by different values of the input parameters. The weld quality is characterized by two categories of parameters: geometrical parameters and mechanical parameters. They are dependent on the following process parameters: electric arc voltage, electric current intensity, welding speed, the feed wire velocity. Because the dependence between inputs and outputs is a nonlinear one was used an artificial feed forward neural network (ANN). The ANN was trained with the backpropagation algorithm, using as training patterns data measured from the mechanical process. This ANN can be used to estimate some parameters from future experiments of the mechanical process.

The Analysis of Laser Modification of the Surface of SLS Specimens

2015 ◽  
Vol 220-221 ◽  
pp. 698-702
Author(s):  
Vladislav Markovic ◽  
Olegas Černašėjus
Keyword(s):  
Selective Laser Sintering ◽  
Laser Sintering ◽  
Powder Steel ◽  
Geometrical Parameters ◽  
Technological Parameters ◽  
Laser Modification ◽  
Sintered Steels ◽  
Laser Equipment ◽  
Sintering Method ◽  
Modification Of The Surface

In the Paper, an analysis of laser modification of the surface of specimens produced of powder steel 1.2083 by SLS (selective laser sintering) method is carried out. Three main structures being formed on laser modification of the sintered steels are presented: periodical, interim and degrading. The dependence of the changes of the technological parameters of the laser equipment on the geometrical parameters of the specimen under processing is provided.

scholarly journals Properties Of Viscose Vortex Yarns Depending On Technological Parameters Of Spinning

2015 ◽  
Vol 15 (2) ◽  
pp. 138-147 ◽  
Author(s):  
Eva Moučková ◽  
Iva Mertová ◽  
Petra Jirásková ◽  
Gabriela Krupincová ◽  
Dana Křemenáková
Keyword(s):  
Abrasion Resistance ◽  
Geometrical Parameters ◽  
Bending Rigidity ◽  
Technological Parameters ◽  
Lower Mass ◽  
Yarn Diameter ◽  
Yarn Properties ◽  
Spun Yarns ◽  
Vortex Yarn ◽  
The Relationship

AbstractThis paper analyzes the relationship between technological parameters of spinning of 100% CV Vortex yarns of different counts and its selected geometrical parameters (a lead of helix of wrapping fibre ribbon, yarn diameter) as well as yarn properties. The number of twist of wrapping fibre layer is determined. The effect of the yarn delivery speed, hollow spindle diameter, and the main draft on the hairiness, mass irregularity, tenacity, elongation, resistance to abrasion and bending rigidity of Vortex yarn is observed. The yarn properties are compared with the properties of open-end rotor spun yarns. Slivers of the same spinning lot were used for the production of both kinds of yarn. The results showed that the delivery speed in combination with spindle diameter affects yarn diameter, hairiness and abrasion resistance. Mass irregularity and imperfections of yarn is mainly affected by the main draft of drafting unit. Technological parameters of spinning do not affect the level of bending rigidity of the Vortex yarn. Tested rotor spun yarns had a larger diameter, higher hairiness, lower tenacity and higher elongation, lower mass irregularity and number of imperfections, higher abrasion resistance and lower bending rigidity compared to tested Vortex spun yarns.

scholarly journals Geometric parameters optimization of planar interdigitated electrodes for bioimpedance spectroscopy

2019 ◽  
Vol 4 (1) ◽  
pp. 13-22 ◽  
Author(s):  
M. Ibrahim ◽  
J. Claudel ◽  
D. Kourtiche ◽  
M. Nadi
Keyword(s):  
Electrical Impedance ◽  
Complete System ◽  
A Priori ◽  
Parameters Optimization ◽  
Three Dimensions ◽  
Biological Medium ◽  
Design Parameters ◽  
Geometrical Parameters ◽  
Bioimpedance Spectroscopy ◽  
Frequency Behavior

Abstract This paper is concerned with a physical model of an interdigitated sensor working in a frequency range from 100 Hz to 10 MHz. A theoretical approach is proposed to optimize the use of the sensor for bioimpedance spectroscopy. The correlation between design parameters and frequency behavior in coplanar impedance sensors are described. CoventorWare® software was used to model the biological medium loaded interdigital sensor in three dimensions to measure its electrical impedance. Complete system simulation by a finite element method (FEM) was used for sensor sensitivity optimization. The influence of geometrical parameters (number of fingers, width of the electrodes) on the impedance spectroscopy of the biological medium was studied. The simulation results are in agreement with the theoretical equations of optimization. Thus, it is possible to design a priori such sensor by taking into account the biological medium of interest that will load the sensor.

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.

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