Artykuły w czasopismach: „Modeling of electric discharge grinding”

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Strelchuk, Roman. "SURFACE ROUGHNESS MODELING DURING ELECTRIC DISCHARGE GRINDING WITH VARIABLE POLARITY OF ELECTRODES". Cutting & Tools in Technological System, nr 94 (16.06.2021): 77–84. http://dx.doi.org/10.20998/2078-7405.2021.94.09.

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The article presents the probabilistic-statistical modeling of surface roughness in the process of electric discharge grinding with the variable polarity of electrodes. The correlation between electric modes of machining and indicators of the quality of the machined surface was established. A probabilistic-statistical model of part surface roughness formed during grinding is obtained, which establishes the correlation between high-altitude surface parameters and electrical machining modes. The developed model makes it possible to calculate the height parameters of the part roughness depending on the electrical modes of grinding. The height of microroughness is determined by the same machining conditions as the depth of erosion pits. It is possible to obtain low roughness if electrical machining modes are reduced.

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Satyarthi, M. K., i Pulak M. Pandey. "Modeling of material removal rate in electric discharge grinding process". International Journal of Machine Tools and Manufacture 74 (listopad 2013): 65–73. http://dx.doi.org/10.1016/j.ijmachtools.2013.07.008.

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Strelchuk, Roman, i Oleksandr Shelkovyi. "RESEARCH OF THE CUTTING MECHANISM AT ELECTRICAL DISCHARGE GRINDING". Cutting & Tools in Technological System, nr 95 (26.12.2021): 37–44. http://dx.doi.org/10.20998/2078-7405.2021.95.05.

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The paper presents the results of a study of the cutting mechanism during electrical discharge grinding of hard alloys. The cutting mechanism during electrical discharge grinding was studied using mathematical modeling. By means of geometric modeling, a method of grinding cup wear was developed. The functional dependence of the diamonds use factor in the Kw wheel on the technological parameters of processing, wear and tool characteristics were determined. Analysis of the results of the study shows that an increase in efficiency at electrical discharge grinding can be achieved by reducing the wear of S, and by corresponding variation in the concentration of diamonds and technological modes of processing.

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Strelchuk, Roman, i Oleksandr Shelkovyi. "EDM GAP MODELING AT ELECTRICAL DISCHARGE GRINDING WITH CHANGE OF ELECTRIC POLARITY". Cutting & Tools in Technological System, nr 93 (31.12.2020): 95–102. http://dx.doi.org/10.20998/2078-7405.2020.93.11.

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Shrivastava, Pankaj Kumar, i Avanish Kumar Dubey. "Experimental modeling and optimization of electric discharge diamond face grinding of metal matrix composite". International Journal of Advanced Manufacturing Technology 69, nr 9-12 (7.08.2013): 2471–80. http://dx.doi.org/10.1007/s00170-013-5190-8.

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Zorin, Aleksandr S. "Electro-pulse technology of destruction of solid dielectric materials. Factors influencing the dynamics of discharge processes". Transactions of the Kоla Science Centre of RAS. Series: Engineering Sciences 13, nr 3/2022 (29.12.2022): 87–96. http://dx.doi.org/10.37614/2949-1215.2022.13.3.009.

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The article briefly presents the basics of electro-pulse technology for the disintegration of solid dielectric materials. The scheme of a high-voltage pulse generator and a crushing and grinding chamber integrated into the experimental setup, is considered. The factors influencing the discharge processes are indicated, and the results of modeling the distribution of electric field intensity lines for the corresponding cases are presented.

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Yang, Guang Mei, Yun Peng Zhang, Kai Yue Li i Guo Ding Chen. "A Processing Predictive Model of Ultrasonic Vibration Grinding Assisted Electric Discharge Machining Based on Support Vector Machines". Advanced Materials Research 941-944 (czerwiec 2014): 1928–31. http://dx.doi.org/10.4028/www.scientific.net/amr.941-944.1928.

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To predict the machining results of ultrasonic vibration grinding assisted electric discharge machining (UVGAEDM) in the condition of building predictive model with a few samples but fluctuant values, a predictive model based on SVM was proposed in this paper. Taking machining SiCp/Al as an example, the samples for modeling were obtained through orthogonal test, and then the predictive model was established utilizing MATLAB. Finally, the model was optimized to further improve the prediction accuracy about the processing indicatorssurface roughness and processing velocity. It shows that the predictive results are in good accord with the test results, with the maximum relative error being less than 12%, meaning the predictive model is reliable and effective.

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Golabczak, Andrzej, Marcin Golabczak, Andrzej Konstantynowicz, Robert Swiecik i Marcin Galant. "Modeling and Experimental Investigations of the Surface Layer Temperature of Titanium Alloys during AEDG Processing". Defect and Diffusion Forum 365 (lipiec 2015): 63–70. http://dx.doi.org/10.4028/www.scientific.net/ddf.365.63.

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Observing the latest manufacturing processes, the following tendencies can be noted: the gain of the energetic efficiency and shortening of the processing time with parallel preservation of the dimensions tolerance, shape tolerance and outer layer quality of the processed workpiece. Also the possibilities of gaining efficiency by rising criteria for process parameters are limited. It is mainly observed in the processing of hard machinable materials like titanium alloys or sintered carbides. Problems related to poor machinability were revealed during the final manufacturing processes using abrasive grinding [1,2]. In this work the results which have been presented are related to the influence by selected electrical parameters of the Abrasive Electrodischarge Grinding (AEDG) on the surface layer temperature of machined samples, in comparison to conventional grinding. Also the change in temperature during the AEDG has been depicted. The basis of this work is similar to the investigations of the deep grinding of surfaces of the titanium alloy Ti6Al4V using CBN and a diamond grinding wheel. For the comparative evaluation of the conventional grinding and AEDG, measurements of the specific grinding energy, energy of the spark discharge and internal stresses in the surface layer have been used.

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Wang, Tingzhang, Chunya Wu, Henan Liu, Mingjun Chen, Jian Cheng i Su Dingning. "On-machine electric discharge truing of small ball-end fine diamond grinding wheels". Journal of Materials Processing Technology 277 (marzec 2020): 116472. http://dx.doi.org/10.1016/j.jmatprotec.2019.116472.

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Gao, Ji, Di Wang i Yao Sun. "The Study of EDG GH3536 Surface Roughness Base on the Artificial Neural Network Modeling". Advanced Materials Research 690-693 (maj 2013): 3175–79. http://dx.doi.org/10.4028/www.scientific.net/amr.690-693.3175.

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The process parameters of electrical discharge grinding,such as workpiece polarity, pulse width, pulse interval, peak current, peak voltage, all have influence on GH3536’s surface roughness.General method is difficult to determine the relationship between the process parameters and the process indicators. This article established a artificial neural network model of EDG GH3536 surface roughness which can forecast. Neural network algorithm use BP algorithm, the network structure is the 2-4-1.

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Yadav, Ravindra Nath, i Vinod Yadava. "A Hybrid Methodology of ANN-NSGA-II for Optimization of the Process Parameters of Slotted-Electrical Discharge Abrasive Grinding Process". International Journal of Materials Forming and Machining Processes 1, nr 2 (lipiec 2014): 16–31. http://dx.doi.org/10.4018/ijmfmp.2014070102.

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Slotted-Electrical Discharge Abrasive Grinding (S-EDAG) is a new innovative hybrid machining process, which is developed by comprising the Electrical Discharge Grinding (EDG) and Abrasive Grinding (AG) where both the processes occur alternatively. The selection of the suitable combination of process parameters is much difficult due to non-linear relation between input and output. The aim of this study is to apply a hybrid approach of Artificial Neural Network (ANN) and Non-Dominated Sorting Genetic Algorithm (NSGA-II) to optimize the process parameters of S-EDAG process during machining of Al/SiC/B4C composite. ANN architecture with back propagation algorithm has been used for modeling, which is trained and tested with experimental data. The experimental data have been collected after exhaustive experimentation considering the effect of current, pulse duration, pulse interval, wheel RPM and abrasive grit number on material removal rate (MRR) and average surface roughness (Ra). The developed ANN model has been coupled with NSGA-II to generate the population and evaluate the objective functions during optimization. The results have been shown that hybrid approach of ANN-NSGA-II provides set of optimal solution that helps to manufacturer to select the appropriate combination of input parameters and reduce the product manufacturing cost.

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Prakash, Marimuthu K., Kumar C. S. Chethan i Prasada H. P. Thirtha. "Residual Stresses Modelling of End Milling Process Using Numerical and Experimental Methods". Materials Science Forum 978 (luty 2020): 106–13. http://dx.doi.org/10.4028/www.scientific.net/msf.978.106.

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Machining has been one of the most sort of process for realizing different products. It has significant role in the value additions process. Machining is one of the production process where material is removed from the parent material to realize the final part or component. Among machining, the well known machining processes are turning, milling, shaping, grinding and non-conventional machining processes like electric discharge machining, ultrasonic machining, chemical machining etc. The fundamental of all these processes being material removal in the form of chips using a tool either in contact or not in contact. In the present work, milling is being taken for study Finite element analysis is being used as a tool to understand the different phenomenon that underlies the machining processes. Of late, the machining induced residual stresses is of great interest to the researchers since the residual stresses have an impact on the functional performances. The present work is to model the milling process to predict the forces and residual stresses using finite element method. Unlike many researchers, the authors have attempted to develop oblique cutting model rather than an orthogonal cutting model. The present work was carried out on AISI 1045 steel.

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Fattahi, Saman, Takuya Okamoto i Sharifu Ura. "Preparing Datasets of Surface Roughness for Constructing Big Data from the Context of Smart Manufacturing and Cognitive Computing". Big Data and Cognitive Computing 5, nr 4 (25.10.2021): 58. http://dx.doi.org/10.3390/bdcc5040058.

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In smart manufacturing, human-cyber-physical systems host digital twins and IoT-based networks. The networks weave manufacturing enablers such as CNC machine tools, robots, CAD/CAM systems, process planning systems, enterprise resource planning systems, and human resources. The twins work as the brains of the enablers; that is, the twins supply the required knowledge and help enablers solve problems autonomously in real-time. Since surface roughness is a major concern of all manufacturing processes, twins to solve surface roughness-relevant problems are needed. The twins must machine-learn the required knowledge from the relevant datasets available in big data. Therefore, preparing surface roughness-relevant datasets to be included in the human-cyber-physical system-friendly big data is a critical issue. However, preparing such datasets is a challenge due to the lack of a steadfast procedure. This study sheds some light on this issue. A state-of-the-art method is proposed to prepare the said datasets for surface roughness, wherein each dataset consists of four segments: semantic annotation, roughness model, simulation algorithm, and simulation system. These segments provide input information for digital twins’ input, modeling, simulation, and validation modules. The semantic annotation segment boils down to a concept map. A human- and machine-readable concept map is thus developed where the information of other segments (roughness model, simulation algorithm, and simulation system) is integrated. The delay map of surface roughness profile heights plays a pivotal role in the proposed dataset preparation method. The successful preparation of datasets of surface roughness underlying milling, turning, grinding, electric discharge machining, and polishing shows the efficacy of the proposed method. The method will be extended to the manufacturing processes in the next phase of this study.

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Strelchuk, R., O. Shelkovyi, Y. Gutsalenko, C. Iancu, V. Subbotina, S. Knyazev i O. Volkov. "Research of the dependence of geometric parameters of holes on electroerosive grinding modes with a changing polarity of electrodes". IOP Conference Series: Materials Science and Engineering 1235, nr 1 (1.03.2022): 012023. http://dx.doi.org/10.1088/1757-899x/1235/1/012023.

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Abstract In this paper are presented the results of electrical discharge diamond grinding with with difference polarities for processing various materials and calculates geometric parameters of erosion holes. The purpose of the study is to determine the volume of holes during electrical discharge diamond grinding using the mathematical method of planning experiments. The experimental plans is a combination of statistical theory and mathematical model, which is very useful in the modelling and analysing the technical problems. As a result of experimental studies, a mathematical model of the volume of holes from electrical modes of the process of electrical discharge diamond grinding was built. The mathematical formula of geometric parameters of holes obtained can be used to determine the volume of holes for different electrical quantities of discharge diamond grinding. It is found that the most significant factors that affect the geometric parameters of holes are the voltage of the igniting pulse and the pulse duration. The dependence of electrical parameters on the hybrid grinding process is investigated. There is a certain volume of holes, at which the discharge acts most efficiently, and the process performance is the most optimal. During the operation of the pulse generator, it is preferable to maintain a certain value of geometric parameters of holes, which results in an unhindered release of metal, since the effect of electrical erosion increases.

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Mishra, Virendra, i Pulak M. Pandey. "Experimental investigations into electric discharge grinding and ultrasonic vibration-assisted electric discharge grinding of Inconel 601". Materials and Manufacturing Processes 33, nr 14 (27.03.2018): 1518–30. http://dx.doi.org/10.1080/10426914.2018.1453143.

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Ding, Song Lin, John P. T. Mo, Milan Brandt i Richard Webb. "Electric Discharge Grinding of Polycrystalline Diamond Materials". Applied Mechanics and Materials 271-272 (grudzień 2012): 333–37. http://dx.doi.org/10.4028/www.scientific.net/amm.271-272.333.

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The poor electric conductivity of polycrystalline diamond (PCD) makes it difficult to machine with the conventional EDM process. Inappropriate selection of parameters of the power generator and the servo system leads to unstable working condition and low material removal rate. This paper introduces a method to find optimal parameters in the Electrical Discharge Grinding (EDG) of PCD materials with Taguchi method. The theory and detailed procedures are presented, experimental results are analyzed. The optimized configuration was validated through confirmation tests.

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Singar Yadav, Ram, i Vinod Yadava. "Hybrid design-based modelling and multi-objective optimization of hybrid machining of hybrid metal matrix composites". Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 233, nr 7 (11.07.2018): 2275–301. http://dx.doi.org/10.1177/0954406218786324.

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Electrical discharge diamond face surface grinding (EDDFSG) is a hybrid machining technique consisting of face surface electrical discharge grinding and diamond face surface grinding. The machining of hybrid metal matrix composites (HMMCs) is still facing challenges for better machining performance. In the present article, an effort was made for hybrid design-based experimental modelling, performance prediction and multi-objective optimization of EDDFSG of Al/Al2O3p/B4Cp and Al/SiCp/B4Cp HMMCs. Gap current, on-time, off-time, abrasive grit number, revolutions per minute (RPM) of wheel and table speed are the process parameters whose effects on material removal rate and surface roughness ( Ra) were analysed. The machining characteristics of HMMCs were investigated using performance predictions. Binary coded modified distance-based Pareto genetic algorithm was integrated with hybrid design-based RSM models for multi-objective optimization of EDDFSG process. The surface texture and re-solidified layers were also analysed using scanning electron microscopy. The selected optimized results were found to have better material removal rate and surface finish along with negligible presence of re-solidified layers during verification experiments.

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Liu, Y. H., Y. F. Guo i J. C. Liu. "Electric discharge milling of polycrystalline diamond". Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 211, nr 8 (1.08.1997): 643–47. http://dx.doi.org/10.1243/0954405981516580.

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Polycrystalline diamond (PCD) has been used widely in modern industry. However, the manufacture of PCD blanks is not an economical and efficient process. The shaping of PCD blanks with conventional machining methods (such as grinding), is a long, labour-intensive and costly process. Electromachining processes promise to be effective and economical techniques for the production of tools and parts from PCD blanks. Wire electric discharge machining is able to effectively slice PCD. Electrical discharge machining (EDM) and electrical discharge grinding (EDG) shape PCD blanks at a lower cost. However, EDM and EDG of a large surface area on PCD show lower efficiency. This paper presents a new process of machining PCD using electrical discharge (ED) milling. ED milling employs a DC source instead of the pulse generator used in EDM, and uses a water-based emulsion as the machining fluid. This process is able to effectively machine a large surface area on PCD, and effectively machine other advanced conducting materials such as cubic born nitride (CBN), and ceramics. The effect of pulse on-time, peak current, and polarity on the process performance has been investigated.

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Khassenov, A. K., D. Zh Karabekova, G. A. Bulkairova, D. А. Nurbalayeva i M. Stoev. "Electro-pulse method for obtaining raw materials for subsequent flotation enrichment of ore". Bulletin of the Karaganda University. "Physics" Series 101, nr 1 (30.03.2021): 57–62. http://dx.doi.org/10.31489/2021ph1/57-62.

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The main method of enrichment of polymetallic ores is flotation. The peculiarity of solid mineral processing is the preliminary preparation of raw materials. The essence of this stage is the grinding and sorting of raw materials in order to fully reveal the useful substance from the waste rock. The article is devoted to the study of the effect of electric pulse discharges on the grinding of ore containing non-ferrous metals. This article proposes an electro-pulse method for obtaining raw materials for subsequent flotation enrichment of ore in order to extract valuable components. This method of grinding ores is based on the use of the energy of a pulsed shock wave that occurs as a result of a spark electric discharge in a liquid. An experimental electric pulse unit with a crushing unit is described. When electrohydraulic action on solid particles in an aqueous solution increases the intensity of the grinding process under the influence of additional pressure associated with cavitation. The object of the study was the natural ore of the Akbastau mine. Ore grinding operations were performed at various parameters of the electric pulse plant. The dependences of ore grinding on the electrical and geometric parameters of the electric pulse installation, the value of the interelectrode gap on the switching device, the pulse repetition frequency and discharge energies are determined. It is found that with increasing discharge energies introduced into the discharge channel, the fraction of the crushed fraction increases.

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Kumar, Ravinder, Abhishek Singh i Inderdeep Singh. "Electric discharge hole grinding in hybrid metal matrix composite". Materials and Manufacturing Processes 32, nr 2 (10.11.2016): 127–34. http://dx.doi.org/10.1080/10426914.2016.1198012.

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Nussupbekov, B. R., A. K. Khassenov, D. Zh Karabekova, U. B. Nussupbekov, M. M. Bolatbekova i M. Stoev. "Coal pulverization by electric pulse method for water-coal fuel". Bulletin of the Karaganda University. "Physics" Series 96, nr 4 (30.12.2019): 80–84. http://dx.doi.org/10.31489/2019ph4/80-84.

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In the article describes the electrohydraulic method as a source of high energy concentration for the disintegration of the components of water-coal fuel in an aqueous medium under the action of pulsed discharges. The proposed method of grinding coal is based on the use of pulsed shock wave energy resulting from a spark electric discharge in a liquid. The essence and distinctive feature of the proposed technology is that the processing of the material using the energy of the shock wave released with electrohydraulic action allows to obtain a quickly crushed product of a given size. The degree of grinding of the material on the dependence of the electrical and geometric parameters of the installation is determined. The optimal parameters of the capacitance of capacitor banks, voltage of pulse discharges, number of pulse discharges and forming gap distance are proposed. The presented results of laboratory tests at different temperature mode, which proves that the grinding of coal by electric discharge method does not require additional cooling, since the processing process is carried out in a liquid medium. The main working element in the electric pulse processing is a spark discharge, the resulting product is not contaminated with the materials of grinding bodies, characteristic of the traditional mechanical method.

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Rahman, Mustafizur. "Special Issue on Micro/Nano Machining – Processes, Systems and Control". International Journal of Automation Technology 5, nr 1 (5.01.2011): 3. http://dx.doi.org/10.20965/ijat.2011.p0003.

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In recent years, the trend in miniaturization of products is pervasive in areas such as information technology, biotechnology, environmental and medical industries. Micro-machining is the key supporting technology that has to be developed to meet the challenges posed by the requirements of product miniaturization and industrial realization of nanotechnology. Micro-machining techniques can be carried out by techniques based on energy beams (beam-based micro-machining) or solid cutting tools (tool-based micro-machining). Beambased micro-machining have some limitations due to poor control of 3D structures, low material removal rate and low aspect ratio. Moreover, these processes require special facilities and the maximum achievable thickness is relatively small. Some of these limitations can be overcome by tool-based micro-machining techniques using ultra precision machine tools and solid tools used as cutting elements to produce the micro-features with well controlled shape and tolerances. Tool-based micro-machining techniques essentially include precision machining processes as turning, milling, grinding and electrical discharge machining (EDM), whereby material removal is done at the micron level. The advantages of such processes are that almost every material such as metals, plastics and semiconductors can be machined with no limitation in machining shapes. Recently, combinations of conventional material removal processes, such as turning and milling, have been hybridized with non-conventional machining processes like EDM and EDG to fabricate micro-structures with high dimensional accuracy. In order to achieve meaningful implementation of compound micro-machining techniques three important areas are required to be addressed. These are: development of machine tools capable of performing compound micro-machining (i.e. micro turning, micro milling, micro EDM, etc. on the same machine and setup), understanding of process physics to provide relevant background for modeling,measurement, identification of control parameters and application of feedback control in order to control compound and hybrid manufacturing processes and development of compound and hybrid processes. An integrated effort in these areas is needed for successful implementation of tool-based micro-machining. An attempt has been made in this special issue to highlight latest articles on these areas. I would like to express my sincere appreciation to the authors, reviewers and editors for their invaluable contributions for this issue.

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Iwai, Manabu, Shinichi Ninomiya, Tokiteru Ueda i Kiyoshi Suzuki. "Electrical Discharge Truing of a Vitrified Bonded Superabrasive Wheel with Electrical Conductivity". Advanced Materials Research 591-593 (listopad 2012): 319–24. http://dx.doi.org/10.4028/www.scientific.net/amr.591-593.319.

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With its high grit retention and easiness to true and dress, the vitrified bond is widely used as a bond material for cBN and diamond grinding wheels. By giving electrical conductivity to the vitrified bond, application of electrical discharge trueing/dressing and detection of a workpiece position by electrical contact sensing will become possible. And moreover, application of the vitrified bonded wheels to various types of electro-assisted grinding processes (electrochemical or electro discharge assisted methods) is expected. In this study, vitrified bonded diamond segments with electrical conductivity were manufactured experimentally by mixing the fine copper powders in the vitrified bond matrix. As a result of investigation into the electro discharge trueing performance in the die sinking and wire electro discharge machining, it was found that a vitrified bonded wheel could be formed by electro discharge machining only because the bond was electrically conductive. In addition, the electro discharge complex grinding utilizing electric discharge machining was applied to the PCD cutting tool materials using the electrically conductive vitrified bonded wheel, and confirmed that the grinding could be continued for a long time maintaining a stable grinding force.

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Shu, Xia Yun, i Hong Hai Zhang. "Design and Experimental Investigation on High Efficient Horizontal Micro Electrical Discharge Machine". Applied Mechanics and Materials 456 (październik 2013): 32–37. http://dx.doi.org/10.4028/www.scientific.net/amm.456.32.

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Micro-electrical discharge machining is a non-contact manufacturing process without macroscopic force. Microelectrode fabrication is the fundamental and influence factor of micro electric discharge machining. As for the efficiency of microelectrode fabrication, this paper proposed a fast online microelectrode fabrication method by an efficient horizontal micro electric discharge machine, in which an online diamond wheel ultra-precision grinding method and an online wire electrical discharge grinding method is combined to fabricate microelectrode. Machine designed in this paper consist of a CCD online dimension examination system, precision motion and feeding system, nanosecond-pulse independent discharged power supply and gap state-detection system. experimental study on microelectrode, micro nozzle fabrication and microstructure milling by the machine conducted. Microelectrode with 15 micrometers in diameter and micro hole with 50 micrometers in diameter are done in experiment. Results show that the composite method improves the efficiency of micro electrical discharge machining.

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Wang, Hai Bin, Yan Ling Guo, Fei Hu Zhang i Song Bao Luo. "Dressing Electric Spark Parameters of Cast Iron Agglutinant Abrasion Wheel". Applied Mechanics and Materials 121-126 (październik 2011): 1625–29. http://dx.doi.org/10.4028/www.scientific.net/amm.121-126.1625.

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The dedicated wheel dresser was used for the aspheric surface curve grinding device Nanosyhs-300. The dresser can deal with diamond wheel of the cast iron binding agent for electric spark reshaping and on-line electrolysis repairing sharp. Discharge parameter on the reshaping accuracy and efficiency was studied in the reshaping processing. Therefore, a group of discharge parameters for emery wheel dressing were obtained.

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Kazub, Valery T., Maria K. Kosheleva i Stanislav P. Rudobashta. "KINETICS OF GRINDING OF VEGETABLE RAW MATERIALS DURING ELECTRIC DISCHARGE EXTRACTION". IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENII KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 64, nr 6 (16.05.2021): 76–82. http://dx.doi.org/10.6060/ivkkt.20216406.6385.

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The influence of the degree of grinding of the particles of growing raw materials during electric discharge extraction on the quality of the obtained extracts was studied. Each discharge during electro-discharge extraction contributes to the grinding of a part of the raw material, which is confirmed by granulometric analysis. The particle size of the raw material should be controlled, since excessive grinding of the extracts results in cloudy, difficult to clarify and poorly filtered. The design of the extraction chamber is proposed, in which the grounded electrode is made in the form of a perforated plate, called a false bottom, with the optimal size of the holes and their density, which eliminates the over-grinding of the raw material particles, which leads to the production of turbid and difficult-to-filter extracts. Since the extraction of raw materials is carried out at a certain ratio of solid-liquid phases, the volume of the chamber from the sieve to the bottom does not significantly affect the kinetics of the extraction process itself, since it is intended for collecting the smallest particles of processed raw materials, the mass of which does not exceed 15-16% of the loaded mass of raw materials. The device of the extraction chamber, due to the high turbulence and intensive mixing of the suspension under the action of cavitation and shock waves initiated by the discharge in the liquid, allows you to remove small particles of raw materials less than 1 mm in size from the working area of the chamber. The results of the study show that the extraction of target components from various raw materials using a chamber with a false bottom can significantly reduce the content of the smallest particles of raw materials in the extract. It facilitates the filtration of the extract, reduces the filtration time, significantly reduces the likelihood of turbidity of the solution due to suspension, which improves the quality of the extract. Experimental studies of the developed electric discharge chamber with a false bottom, conducted with various types of plant raw materials, confirm the effectiveness of extraction in the chamber of the proposed design.

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Yanyushkin, Alexander, Vyacheslav Popov i Daniel Rychkov. "Application of protective coatings in combined electric diamond grinding". MATEC Web of Conferences 224 (2018): 01027. http://dx.doi.org/10.1051/matecconf/201822401027.

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The article discusses the practical use of combined electro-discharge diamond grinding characterized by metal bond grinding wheel operation in a self-sharpening mode with minimal wheel consumption. The upgrading of grinding equipment technological capabilities at processing high-strength materials is possible due to the galvanic deposition of anti-friction and anti-corrosion films on the surfaces of the diamond wheel and the workpiece. These conditions facilitate the cutting process thereby increasing performance and the quality of the processed surfaces of machine parts. The application of this method provides the diamond wheels operation in self-sharpening mode and guarantees the continuity of its geometric shape which in turn ensures that no defective layer is formed on the treated surface and the cutting tools have longer efficient life.

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Wang, Jie-sheng, Na-na Shen i Shi-feng Sun. "Integrated Modeling and Intelligent Control Methods of Grinding Process". Mathematical Problems in Engineering 2013 (2013): 1–15. http://dx.doi.org/10.1155/2013/456873.

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The grinding process is a typical complex nonlinear multivariable process with strongly coupling and large time delays. Based on the data-driven modeling theory, the integrated modeling and intelligent control method of grinding process is carried out in the paper, which includes the soft-sensor model of economic and technique indexes, the optimized set-point model utilizing case-based reasoning, and the self-tuning PID decoupling controller. For forecasting the key technology indicators (grinding granularity and mill discharge rate of grinding process), an adaptive soft-sensor modeling method based on wavelet neural network optimized by the improved shuffled frog leaping algorithm (ISFLA) is proposed. Then, a set point optimization control strategy of grinding process based on case-based reasoning (CBR) method is adopted to obtain the optimized velocity set-point of ore feed and pump water feed in the grinding process controlled loops. Finally, a self-tuning PID decoupling controller optimized is used to control the grinding process. Simulation results and industrial application experiments clearly show the feasibility and effectiveness of control methods and satisfy the real-time control requirements of the grinding process.

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Ji, Renjie, Yonghong Liu, Yanzhen Zhang, Baoping Cai i Rong Shen. "ELECTRIC DISCHARGE MILLING AND MECHANICAL GRINDING COMPOUND MACHINING OF SILICON CARBIDE CERAMIC". Machining Science and Technology 14, nr 4 (21.12.2010): 502–21. http://dx.doi.org/10.1080/10910344.2010.533623.

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Bychkov, V. L., S. V. Anpilov, N. P. Savenkova, V. Stelmashuk i P. Hoffer. "On modeling of “plasmoid” created by electric discharge". Journal of Physics: Conference Series 996 (marzec 2018): 012012. http://dx.doi.org/10.1088/1742-6596/996/1/012012.

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Yahagi, Yuna, Tomohiro Koyano, Masanori Kunieda i Xiao Dong Yang. "High Spindle Speed Wire Electrical Discharge Grinding Using Electrostatic Induction Feeding Method". Key Engineering Materials 447-448 (wrzesień 2010): 268–71. http://dx.doi.org/10.4028/www.scientific.net/kem.447-448.268.

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This paper describes machining characteristics of high spindle speed WEDG using the electrostatic induction feeding method. In this method, non-contact electric feeding allows the workpiece rod to be rotated at a high speed of up to 50000rpm. Since the temperature rise on the workpiece surface is low, the material removal rate was two times higher and the surface roughness was also improved compared to the normal RC discharge circuit where the rotational speed was 1000rpm at the highest due to contact electric feeding using a brush. Furthermore, micro rods thus prepared were used as tool electrodes to machine micro-holes with the same rotation speed of 50000rpm. It was found that smaller gaps and better straightness can be obtained due to the high flushing efficiency at the high spindle speed.

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Malyushevskaya, A. P., i A. N. Yushchishina. "Intensification of the Processes of Extraction of Humic Acids from Biosubstrates under the Action of Electric Discharges". Elektronnaya Obrabotka Materialov 58, nr 4 (sierpień 2022): 79–80. http://dx.doi.org/10.52577/eom.2022.58.4.70.

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The article deals with the study of factors participating in the extraction of humic acids from plant substrates under the action of electric discharges. Using the example of the electric discharge treat-ment of the peat-water suspension, it was demonstrated that the main factor affecting the intensity of extraction is the degree of the solid phase of the biosubstrate-water suspension grinding, which depends on the pressure amplitude at a distance of the inner radius of the chamber and the number of discharge pulses. Experimental studies have shown that the amount of chemical reagents (alkalis) commonly used in the extraction of humic acids from peat can be significantly reduced due to the appearance of radicals and peroxide compounds in the peat-water suspension during the ac-tion of an electric discharge. The perspectives of a non-thermal electric discharge meth-od for intensifying the extraction of humic acids from biosubstrates are determined.

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Sarikavak, Yasin, i Can Cogun. "Single discharge thermo-electrical modeling of micromachining mechanism in electric discharge machining". Journal of Mechanical Science and Technology 26, nr 5 (maj 2012): 1591–97. http://dx.doi.org/10.1007/s12206-012-0305-y.

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Khassenov, A. K. "ELECTRIC PULSE METHOD FOR PRODUCING A SMALL-DISPERSED PRODUCT OF COAL-WATER FUEL". Eurasian Physical Technical Journal 17, nr 2 (24.12.2020): 96–99. http://dx.doi.org/10.31489/2020no2/96-99.

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One of the most pressing issues is the effective use of coal combustion in the form of water-coal fuel, which has a number of advantages over layer or pulverized combustion. Coal-water fuel has a number of economic, operational and environmental advantages. The article considers the electric pulse method as a source of obtaining a fine product of coal-water fuel. The proposed method for grinding coal is based on the use of the energy of a pulsed shock wave resulting from a spark electric discharge in a liquid. The parameters of the electric pulse discharge for obtaining the required granulometric composition of the components of coal-water fuel are determined.

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Khassenov, A. K., B. R. Nussupbekov, D. Zh Karabekova, G. A. Bulkairova, B. U. Shashubai i M. М. Bolatbekova. "Electric pulse method of processing cullet". Bulletin of the Karaganda University. "Physics" Series 105, nr 1 (30.03.2022): 75–80. http://dx.doi.org/10.31489/2022ph1/75-80.

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The article considers the issue of obtaining a recycling resource during the processing cullet, which harms the environment. During the preparation of raw materials in the household waste recycling stages, the material is crushed to the right size. This is implemented in mills based on various methods of destruction. In this regard, analyses of the currently existing types of mechanical mills were carried out and their disadvantages were investigated. To solve glass recycling problem, this study presents the results of processing cullet by the electric pulse method. We provide a description of operation principle of the experimental setup and the design of the working chamber for processing the material under study. In this technology, the processing cullet is carried out with an increase in the discharge voltage of the storage from 25 kV to 35 kV, the capacitor capacity from 0,25µF to 1 µF, the number of pulse discharges from 100 to 600. By using the electric pulse method particles cullet with an initial fraction of 2 mm and 5 mm were crushed from 1 mm to 0.1 mm. The dependence of the output of the final product on the electrical parameters of the installation and the diameter of the obtained glass powder were received. The results of the grinding raw materials with the formation of pulsed electric discharges in a liquid medium allowed assessing the degree of grinding of the material. According to the obtained research data, optimal parameters of cullet grinding were established.

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Li, Wei, Bao Gong Geng, Zhi Yang Song i Hai Hui Zheng. "Research on Electrical Discharge Truing for Precision Profile Grinding with Cast Iron-Bonded Diamond Wheel". Advanced Materials Research 76-78 (czerwiec 2009): 181–85. http://dx.doi.org/10.4028/www.scientific.net/amr.76-78.181.

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In this paper, a precise profile ELID grinding with Electrical Discharge Truing(EDT) has been introduced, and some experiments for efficient and precision EDT process with cast iron-bonded diamond wheel have been carried out with four types of medium: mist, water, pressure air, air, furthermore some machining parameters e.g. electric current, electric voltage have been discussed in detail. For analyzing of the accuracy of EDT process with cast-iron bonded diamond wheel, a profile measurement method with software of MATLAB was used for analyzing of the profiles of cast-iron-bonded diamond wheel and electrode. It can be found that the electrode’s profile can be kept with the consistent designed profile, and the grinding wheel with the designed profile has been got by the appropriate EDT process. Therefore the higher efficiency and precision EDT process can be achieved by the appropriate EDT machining parameters.

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Dem'yanov, A. V., Igor' V. Kochetov, A. P. Napartovich, M. Capitelli, C. Gorse i S. Longo. "Modeling of a 10-liter electric-discharge XeCl laser". Soviet Journal of Quantum Electronics 22, nr 9 (30.09.1992): 786–90. http://dx.doi.org/10.1070/qe1992v022n09abeh003597.

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Hangnilo, Robert, i V. ADANHOUNME. "Modeling The Electric Organ Discharge Of Malapterurus Electricus Catfish". International Journal of Scientific and Engineering Research 3, nr 8 (20.08.2012): 1440–44. http://dx.doi.org/10.14299/ijser.2012.08.001.

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Morozov, Iurii, Tatiana Intogarova, Olga Valieva i Iuliia Donets. "Flotation classification in closed-circuit grinding as a way of reducing sulphide ore overgrinding". Izvestiya vysshikh uchebnykh zavedenii. Gornyi zhurnal, nr 1 (17.02.2021): 85–96. http://dx.doi.org/10.21440/0536-1028-2021-1-85-96.

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Research object and aim. Flotation classification in closed-circuit grinding is a way of improving copper ore flotation indicators by reducing minerals overgrinding. Due to valuable components froth recovery with their uncovering in the process of grinding, loss of copper in flotation tailings with secondary slime are reduced significantly. The research aims to study the possibility to improve the flotation of copper ore based on the use of flotation classification in the closed-circuit grinding. Methodology. In order to solve the problem, laboratory studies on closed-circuit grinding experimental modeling were carried out in a mode with and without flotation classification of hydraulic classification discharge. In each grinding mode, five stages of closed-cycle simulation have been implemented. Flotation classification was carried out in froth flotation modes with froth treatment with and without the tapered chute. According to experimental results, the loss of copper has been determined with slime in hydraulic classification discharge and flotation classification, and flotation classification end-product balance was calculated when operating in the closed-circuit grinding. Summary. The obtained experimental data prove the possibility of improving copper ore flotation by reducing minerals overgrinding in the course of flotation classification in closed-circuit grinding. The technology of flotation classification with froth treatment in tapered chutes make it possible to obtain prime concentrate with 18% copper mass fraction when extracting 37.7% copper into it, and final tailings in flotation classification discharge with 0.13% copper mass fraction under 2% loss.

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AOYAMA, Hidehiko, Ichiro INASAKI, Tojiro AOYAMA i Shinji SEKIYA. "Combined machining of hard and brittle materials (Combination of electric discharge machining and grinding)". Transactions of the Japan Society of Mechanical Engineers Series C 51, nr 467 (1985): 1857–63. http://dx.doi.org/10.1299/kikaic.51.1857.

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Guo, Bing, i Qingliang Zhao. "On-machine dry electric discharge truing of diamond wheels for micro-structured surfaces grinding". International Journal of Machine Tools and Manufacture 88 (styczeń 2015): 62–70. http://dx.doi.org/10.1016/j.ijmachtools.2014.09.011.

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Zhang, Li Xin, i Li Hui Wang. "Quality Research on Electric Discharge Machining with Rotary Surface of Engineering Ceramic". Advanced Materials Research 602-604 (grudzień 2012): 2002–5. http://dx.doi.org/10.4028/www.scientific.net/amr.602-604.2002.

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This paper introduces the theoretical basis and function of developing spindle rotary device. A technological method of wire electro-discharge grinding(WEDG),which is based on the wire electrode cutting machine, is presented. The main factors that influence the machining of engineering ceramic material surface quality are analyzed. And the conclusion is that there are main factors: the main structure and conductivity of the spindle rotary device, and the changes of power in the process of single pulse machining discharge. The conclusions from the experiments provide the theoretical basis for further study on the factors that influence the rotary workpiece surface quality and for the discussion on methods of improving the rotary workpiece surface quality; the conclusions also expand the process scope of WEDM.

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Kang, Yongqiang, Zhipeng Shi i Shuaibing Li. "Modeling of Strong Wind-Sand Dielectric Streamer Discharge". Mathematical Problems in Engineering 2022 (8.03.2022): 1–16. http://dx.doi.org/10.1155/2022/8998922.

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Due to the complex and harsh climate environment in Northwest China, the external insulation of power lines and high-speed train are exposed to strong wind-sand environment all year round, which brings severe challenges to the external insulation design and protection of the electric systems. Based on the theories of streamer discharge, the plate-plate electrode was taken as the analysis object, and a theoretical physical model of the strong wind-sand dielectric discharge is established. In this model, the analytical expressions of electron ionization coefficient and positive ion generation coefficient in a wind-sand environment are deduced considering the combined effects of the airflow velocity, the distortion of the electric field caused by sand particles, and the electrons captured by sand particles in the discharge process; furthermore, the streamer breakdown criterion in wind-sand environment is proposed. Research results can provide an important theoretical basis for the quantitative calculation of the breakdown voltage and the external insulation protection in a strong wind-sand environment.

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Lopatin, V. V., M. D. Noskov, G. Z. Usmanov i A. A. Cheglokov. "Modeling of impulse electric discharge propagation in a condensed dielectric". Russian Physics Journal 49, nr 3 (marzec 2006): 243–50. http://dx.doi.org/10.1007/s11182-006-0097-6.

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Shukhanov, S. N., i A. S. Dorzhiev. "Modernization of the apparatus for grinding root crops". Traktory i sel'hozmashiny 1, nr 2 (2021): 68–72. http://dx.doi.org/10.31992/0321-4443-2021-2-68-72.

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The sustainable functioning of the agro-industrial complex largely determines its scientific and technical support. One of the key directions of the development of agricultural science is the mech-anization of animal husbandry processes. When solving a complex of problems, great attention is paid to the preparation of feed, namely the grinding of root-club crops. This makes it possible to significantly increase the return of each feed unit. As a result of a wide review of literary sources and a thorough analysis of modern designs of root-club grinders, it became possible to solve the technical problem of its modernization by creating a simple as well as reliable design. The peculiarity of the modernization consists in the fact that the electric motor is mounted on the cover of the housing with the help of a flange, which is its component element, besides, the axis of rotation of the shaft structure is aligned with the axis of rotation of the disk structure. Loading hopper is also installed on cover. For this purpose, the cover has a hole for the driving shaft of the electric motor, as well as a window for passage of root clubs from the cavity of the receiving hopper to the space of the housing. Disk is rigidly mounted on free edge of shaft structure. Body is fixed on base by means of uprights vertically and with formation of free space under its bottom and base for installation of unloading neck, as well as reservoir for treated root crops. The discharge neck is structurally made in the form of a funnel with the formation of a conical component at the top and a cylindrical com-ponent at the bottom. In addition, the axis of symmetry of the funnel is aligned with the axis of rotation of the shaft. Its conical component is attached to the outer surface of the bottom structure, and the cylindrical component of the funnel is oriented to the container for the treated material. Concentric holes are made in bottom for passage of processed root crops from cavity of body into structure of discharge neck. The principle of energy saving is carried out by supplying treated fodder to the discharge neck device and further to the receiving vessel mainly due to gravity of the treated fodder.

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Ogawa, Masumi, Kei Mine, Seiki Fuchiyama, Yasuhiro Tawa i Tomohisa Kato. "Development of Multi-Wire Electric Discharge Machining for SiC Wafer Processing". Materials Science Forum 778-780 (luty 2014): 776–79. http://dx.doi.org/10.4028/www.scientific.net/msf.778-780.776.

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In order to slice the larger size ingot toward 6 inch of silicon carbide (SiC), we are developing Multi-wire Electric Discharge Machining (EDM). To prevent wire break during slicing, we have developed the electric discharge pulse control system. So far, with 10 multi-wires, we have succeeded in slicing of 4 inch SiC balk single crystal without wire break. High quality slicing surface (e.g. small value of around 10 μm of SORI for 3 inchi wafer) was also achieved. By polishing methode, EDM-sliced wafer was estimated to have the uniform thickness of damaged layer over the entire surface. We confirmed that the wafer sliced by EDM can be processed in the later process, by grinding the 3 inch wafer. And it was confirmed that 6 inch ingot can be sliced with 10 multi-wire EDM, by slicing the boule of SiC poly crystal. For the larger diameter ingot than 4 inch, Multi-wire EDM will be practically used by the effective removal of machining chips from the machining clearance between the wire and work.

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Bulkairova, Gulden, Bekbolat Nussupbekov, Madina Bolatbekova, Ayanbergen Khassenov, Ulan Nussupbekov i Dana Karabekova. "A research of the effect of an underwater electric explosion on the selectivity of destruction of quartz raw materials". Eastern-European Journal of Enterprise Technologies 3, nr 12 (123) (30.06.2023): 30–37. http://dx.doi.org/10.15587/1729-4061.2023.279009.

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The work is devoted to the study of the effect of an electric explosion on the selectivity of the destruction of quartz raw materials. The object of the study is quartz ore of the Nadyrbay deposit of the Republic of Kazakhstan. An electrohydroimpulse plant for crushing and grinding quartz raw materials has been developed and assembled. Using the electrohydroimpulse method, the granulometric composition of quartz can be adjusted. This makes it possible to adjust the magnitude of the voltage in the discharge channel and time. In this technology, quartz ore processing was carried out with an increase in the discharge voltage of the storage from 14 kV to 25 kV, the length of the interelectrode distance from 8 to 12, the capacitance of the capacitor 0.5 µF, 0.75 µF and the processing time of 5 min. Using the electrohydroimpulse method, quartz ore particles with an initial fraction of 5 mm, 10 mm and 1 mm were crushed to 0.8. The results of the grinding of quartz raw materials with the influence of an underwater electric explosion in a liquid medium allowed us to determine the degree of grinding of the material. The obtained results can be used in the course of studying the characteristics of crushing and grinding of ores. In the food industry, quartz sand within 0.25–0.5 millimeters can be used as a filler to create filters for water purification, as well as products from oil, industrial effluents, etc. Particles ranging in size from 0.5 to 1 millimeter can be used for rough processing of metal, stone and glass. The structural and quantitative analysis of powdered quartzite samples was made using a scanning electron microscope and the stoichiometry of the elements was calculated

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Raychenko, O. I., T. I. Istomina, R. O. Morozova, I. A. Morozov i O. V. Derev'yanko. "Use of Electric Discharge Sintering for Elaboration of Diamond Tools". Advances in Science and Technology 48 (październik 2006): 127–32. http://dx.doi.org/10.4028/www.scientific.net/ast.48.127.

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A number of installations for electric discharge sintering of powder materials is developed. There are installations in which energy is delivered by following currents: 1) superposition of the direct and alternating (with frequency up 7900 Hz) currents, 2) alternating current (50 Hz). The sintering is carried out in conductive (graphite) moulds. The sintering is often done in thermal and electric insulator moulds (for example, ceramic on Si3N4 base, asbestos cement). At sintering of metal-diamond composition in insulator moulds metallic electrodespunches (steel) are used. Such a variant of sintering allows one its duration to short from ~900 s down to ~60–150 s. This ensures complete safety of dimensions and operating characteristics of diamond grains. The technologies of various diamond elements for tools for treatment of glasses and soft stones (stone saws, tools in forms of tablets, rings). The preliminary pressure which is applied to powder sample simultaneously with current was equal to ~10 MPa (~100 kg/cm2). The end pressure was equal to ~100 MPa (~1000 kg/cm2). The current density was equal to ~700– 1200 A/cm2. Tests of diamond tablets (diamond 20/14 mkm, binder 80 % Cu+20 % Sn) at grinding of glass had shown: the abrasivity of tablets with common diamonds is equal to ~50 g/(cm2 min), and abrasivity in case with diamonds annealed in hydrogen is equal to ~70 g/(cm2 min).

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Bityurin, V. A., A. N. Bocharov, A. S. Dobrovolskaya, T. N. Kuznetsova, N. A. Popov i E. A. Filimonova. "Numerical Modeling of Pulse-Periodic Nanosecond Discharges". Journal of Physics: Conference Series 2100, nr 1 (1.11.2021): 012032. http://dx.doi.org/10.1088/1742-6596/2100/1/012032.

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Abstract The first results of the numerical simulation of the Pulse-Periodic Nanosecond discharge in pin-to-pin configuration in 2Dt approximation of the full self-consist system of Navier-Stocks equation for real thermo-chemically non-equilibrium gases, drift-diffusion approximation of the low temperature plasma evolution in external electric and magnetic field and, alternative – arc (spark) discharge model of high-density energy input discharge. The intuitive criteria of the alternative discharge models re-switch are proposed and tested. The pin-to-pin the pulse-periodic nanosecond 5-MHz discharge has been considered for 1 microsecond interval. It was found that rather strong longitudinal non-uniformities of main physical parameters are created at the first corona stage of the interelectrode conducting channel. These nonuniformities reveal long-lived features that have define strong effect on the discharge performance

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Shi, Shao Hua, Pei Qing Ye i Chen Xi Fang. "Design of Five-aixs CNC System for Electric Discharge Grinding (EDG) Polycrystalline Diamond (PCD) Tools". Advanced Materials Research 538-541 (czerwiec 2012): 1316–21. http://dx.doi.org/10.4028/www.scientific.net/amr.538-541.1316.

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Polycrystalline Diamond (PCD) tools are widely used while machining wood-based composites because of its outstanding hardness, thermal conductivity and abrasive resistance. However, the above mentioned beneficial properties such as super hardness also cause problems in manufacturing PCD tools using traditional process methods. The main problem now in manufacturing PCD tools is the low efficiency and difficulties while manufacturing PCD tools with complex curved surface. To manufacture PCD tools with complex curved surface more efficiently, in this paper, the mechanical structure, hardware circuit and software system of five-axis EDG CNC system are introduced. To satisfy the unique requirements of EDG, a proper mechanical structure of 5 CNC controlled axis and 2 manual axis are given, as well as the design of hardware circuit of EDG based on PCI Bus. The software system which is designed based on RT-Linux is divided into four modules: real-time cyclical tasks module, real-time gusty tasks module, non real-time tasks module and EDG process database. , This paper gives out the solutions of the specific functions of this special CNC system, including automatic measurement, automatic programming, automatic electrode wear compensation, and detection and control of spark gap. The detailed structure and organization of the software system is also provided. At last, through actual cutting experiments of woodworking PCD tools, the correctness and practicality of this system is verified.

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