Artículos de revistas: "EDM Products"

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SAKAI, Shigenori, Takahisa MASUZAWA y Shin ITOU. "Finishing of EDM products by ECM using a mate-electrode." Journal of The Japan Society of Electrical Machining Engineers 22, n.º 43 (1988): 18–28. http://dx.doi.org/10.2526/jseme.22.18.

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Ablyaz, Timur Rizovich, Evgeny Sergeevich Shlykov, Karim Ravilevich Muratov y Alexander Valentinovich Zhurin. "Study of the EDM Process of Bimetallic Materials Using a Composite Electrode Tool". Materials 15, n.º 3 (19 de enero de 2022): 750. http://dx.doi.org/10.3390/ma15030750.

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New types of profile products make complex use of bimetals. These materials possess a set of properties such as strength, corrosion resistance, thermal conductivity, heat resistance, wear resistance. For the processing of such products, it is advisable to use electrophysical processing methods, one of which is the technology of copy-piercing electrical discharge machining (EDM). Currently, EDM is one of the most common methods for processing products from modern bimetal materials. An urgent task is to study the EDM process of bimetallic materials. The aim of the work was to increase the efficiency and accuracy of the EDM process of bimetallic products using electrode-tools with different physical and mechanical properties. Bimetal—weld coated steel backing, base material—09G2S steel, surfacing material—M1 copper were used. The processing of the bimetallic workpiece was carried out on an Electronica Smart CNC copy-piercing EDM machine. EI used graphite, copper, and composite. A theoretical model was developed that allows calculation of the amount of removal of bimetallic material of steel–copper depending on the EDM modes and the ET (electrode tool) material. During the processing of the steel layer, regardless of the EI material, microcracks were formed along the grain boundaries, and during the processing of the copper layer, enlarged holes resulted.

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Chang, Wei Jie, Yan Ying Xi y Hao Wei Li. "Simulation of Gap Flow Field in EDM Process Uesd Oil-in-Water Working Fluid". Key Engineering Materials 841 (mayo de 2020): 232–37. http://dx.doi.org/10.4028/www.scientific.net/kem.841.232.

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Electric Discharge Machining (EDM) working fluid as a medium can control electrical discharges occur, carry away the heat, compress discharge channel and help remove the corrosion products out of the gap. The main working fluids used in EDM are oil-based working fluid, gas-based working fluid, powder mixed working fluid, gas mixed working fluid and water-based working fluid. In order to improve the green and safety of EDM working fluid, an oil-in-water working fluid is proposed. A gap flow field model of EDM is established by using external flushing fluid. The flow field distribution, pressure distribution and corrosion products distribution of the machining gap are analyzed by using computational fluid dynamics. The effects of inlet pressure, processing depth and electrode size on the flow field are studied. The simulated results show that within a certain range, removal effect of the corrosion products will increase with inlet velocity and the size of electrode and decrease with processing depth.

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Banu, Asfana y Mohammad Yeakub Ali. "Electrical Discharge Machining (EDM): A Review". International Journal of Engineering Materials and Manufacture 1, n.º 1 (3 de septiembre de 2016): 3–10. http://dx.doi.org/10.26776/ijemm.01.01.2016.02.

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Electro discharge machining (EDM) process is a non-conventional and non-contact machining operation which is used in industry for high precision products. EDM is known for machining hard and brittle conductivematerials since it can melt any electrically conductive material regardless of its hardness. The workpiece machined by EDM depends on thermal conductivity, electrical resistivity, and melting points of the materials. The tool and the workpiece are adequately both immersed in a dielectric medium, such as, kerosene, deionised water or any other suitable fluid. This paper is reviewed comprehensively on types of EDM operation. A brief discussion is also done on the machining responses and mathematical modelling.

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Goossens, An. "Skin allergy in children caused by consumer products". Expert Review of Dermatology 6, n.º 3 (junio de 2011): 237–39. http://dx.doi.org/10.1586/edm.11.18.

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Shlykov, Evgenii, Timir Ablyaz y Karim Muratov. "Theoretical simulation of the process interelectrode space flushing during copy-piercing EDM of products made of polymer composite materials". Metal Working and Material Science 24, n.º 2 (15 de junio de 2022): 25–38. http://dx.doi.org/10.17212/1994-6309-2022-24.2-25-38.

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Introduction. Polymer composite materials (PCM) are used to improve the mechanical properties and increase the working period of products. For the processing of products made of PCM, the use of electrophysical processing methods is standard. One of these methods is copy-piercing electrical discharge machining (EDM). The use of such methods for processing PCM is due to its high physical and mechanical characteristics and the complexity of processing by blade methods. Considering the fact that the PCM element is a binder – epoxy resin, which is destroyed at the edges of the resulting holes and grooves during EDM, PCM can be considered difficult to process. During the EDM of holes in PCM products, the temperature rises, and inefficient cooling often occurs in the processing zone. The paper is devoted to theoretical simulation in the Ansys package, which makes it possible to evaluate the impact of flushing method on the efficiency of the EDM of PCM products based on numerical simulation in finite element analysis software systems. The aim of the work is to increase the productivity of the processes of EDM for PCM products. Methods. Experimental studies were carried out according to the method of a classical experiment on a copy-piercing electrical discharge Smart CNC machine. The workpiece was processed at a constant voltage U = 50 V, pulse on-time Ton = 100 µs and current: I = 10 A. For theoretical simulation of the flow, the ANSYS CFX 20.1 software was used. Flow distribution simulation was carried out at three processing depths (2 mm, 10 mm, 15 mm), as well as at three nozzle inclination angles (15°, 45°, 75°). Results And Discussion. The analysis of the data obtained showed that in the case of the EDM of PCM, the angle of the location of the flushing nozzles should be taken into account in order to increase the productivity of processing deep, blind holes. It is established that the highest performance value is achieved when the nozzles are located at an angle of 15˚. The laminar motion prevails. With this arrangement of the nozzles, the value of the liquid pressure and the removal of the sludge are stable both with the EDM of PCM to a depth of 2 mm, and when processing to a depth of 15 mm. It is noted that for processing holes with a depth of 10 mm or more, it is worth considering the angle of inclination of the flushing nozzle for effective processing, it is necessary to remove eroded particles from the gap. In the process of conducting an experimental study, when processing holes with a depth of 15 mm, sticking of sludge to the electrode-tool was observed, as well as the closure of the EDM process, the occurrence of secondary discharges in the processing zone, which caused the processing to stop.

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Xu, Chengcheng, Fangchao Xu, Feng Sun, Xiaoyou Zhang, Junjie Jin, Boran Luan y Koichi Oka. "Research on an Intelligent Control Method of a Magnetic Actuator for Micro Electrical Discharge Machining". Actuators 11, n.º 12 (9 de diciembre de 2022): 371. http://dx.doi.org/10.3390/act11120371.

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Electrical discharge machining (EDM) is not limited to the strength and hardness of conductive materials, and is a non-contact special processing technology. In micro-EDM, there are problems such as untimely axial positioning, unstable inter-electrode machining voltage, and difficulty in discharging inter-electrode electric erosion products. This paper considers a magnetic actuator with fast response and high accuracy as the local actuator for a micro-EDM. By introducing a domain adjustment mechanism, a variable domain fuzzy PID controller was designed to control the inter-electrode voltage control system of the magnetic actuator for micro-EDM using an intelligent control strategy. During the micro-EDM machining process, the controlled magnetic actuator drives the tool electrode in the axial direction for rapid micro-positioning, thus maintaining effective inter-electrode machining voltage and achieving a high-speed and high precision EDM. Simulation and experimental results showed that compared with traditional micro-EDM, the machining efficiency of the variable domain fuzzy PID control magnetic actuator, and traditional micro-EDM cooperative control, was increased by 40%, the machining process was more stable, and the quality of the machined surface was better.

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Nikolić, Saša, Sven Gohla y Rainer H. Müller. "Lipid nanoparticles: nanocarriers for more effective and safer photoprotective products". Expert Review of Dermatology 6, n.º 5 (octubre de 2011): 501–7. http://dx.doi.org/10.1586/edm.11.56.

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Katz, Z. y J. Naude. "A Neural Network/Expert System Approach for Design Improvement of Products Manufactured by EDM". Journal of Manufacturing Science and Engineering 121, n.º 4 (1 de noviembre de 1999): 733–38. http://dx.doi.org/10.1115/1.2833127.

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The stochastic nature of the electro discharge machining (EDM) process does not allow for a precise prediction of its effect on the machined features. However, there is a direct interrelation between feature design and the process results. The objective of this work is to suggest a neural network based system to facilitate and optimize the design process of products to be machined by EDM. A comprehensive analysis by a neural network and expert system is presented. Aspects of features coding and relations with the process parameters are discussed. Experimental results confirm design improvements and a practical system is described.

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Yadav, Sandeep, Deepak k, Sarthak Sharma y Lalit Vashishth. "Study the effect of process parameters on Electric Discharge Machining: Literature Review". INTERNATIONAL JOURNAL OF ADVANCED PRODUCTION AND INDUSTRIAL ENGINEERING 4, n.º 1 (5 de enero de 2019): 68–80. http://dx.doi.org/10.35121/ijapie201901140.

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Electrical discharge machining (EDM) is one of the earliest non-conventional method of manufacturing processes. This process based on thermoelectric energy between work piece and electrodeand they must have electrical conductivity to generate the spark. A spark generated between work piece and electrode, and removes the material from work piece through melting and vaporizing. EDM produced various types of products such as dies and moulds. EDM is used to manufacture the parts of aerospace, automotive industry and surgical components. The effect of the machining parameters on surface roughness, metal removal rateand tool wear rate are studied.

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11

Ablyaz, Timur Rizovich, Evgeny Sergeevich Shlykov, Karim Ravilevich Muratov, Ilya Vladimirovich Osinnikov, Mikhail Vladimirovich Bannikov y Sarabjeet Singh Sidhu. "Investigation of Plasma-Electrolytic Processing on EDMed Austenitic Steels". Materials 16, n.º 11 (1 de junio de 2023): 4127. http://dx.doi.org/10.3390/ma16114127.

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This study investigates the effect of electrolytic plasma processing on the degree of defective layer removal from a damaged layer obtained after manufacturing operations. Electrical discharge machining (EDM) is widely accepted in modern industries for product development. However, these products may have undesirable surface defects that may require secondary operations. This work aims to study the die-sinking EDM of steel components followed by the application of plasma electrolytic polishing (PeP) to enhance the surface properties. The results showed that the decrease in the roughness of the EDMed part after PeP was 80.97%. The combined process of EDM and subsequent PeP makes it possible to obtain the desired surface finish and mechanical properties. In the case of finishing EDM processing and turning, followed by PeP processing, the fatigue life is enhanced without failure up to 109 cycles. However, the application of this combined method (EDM + PeP) requires further research to ensure consistent removal of the unwanted defective layer.

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Shlykov, Evgenii y Timur Ablyaz. "Improving the Efficiency of EDM Processing of Complex Elements of Products". Metal Working and Material Science 21, n.º 2 (14 de junio de 2019): 53–61. http://dx.doi.org/10.17212/1994-6309-2019-21.2-53-61.

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13

Ali, Mohammad Yeakub, Asfana Banu, Mohamed Abdul Rahman, Muataz Hazza Faizi Al Hazza y Erry Yulian Triblas Adesta. "Precision Control of Kerf in Metal Cutting Using Dry Micro WEDM: Issues and Challenges". Key Engineering Materials 775 (agosto de 2018): 499–505. http://dx.doi.org/10.4028/www.scientific.net/kem.775.499.

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Micro dry wire EDM is a process where gas is used as the dielectric fluid instead of a liquid. In this process certain modifications of a wire EDM are needed during the machining operation to achieve stable machining. Optimizing kerf to get high dimensional accuracy is one of the critical issues in micro dry wire EDM. The fundamental modelling for optimum kerf using micro dry wire EDM has not been formulated yet. Due to the complex phenomenon, the prediction of optimum kerf in a micro dry wire EDM process is rather difficult. Hence, the main objectives of this research are to improve the micro dry wire EDM process and to develop mathematical models for optimum kerf using micro dry wire EDM. During the process improvement of micro dry wire EDM, various machining setup will be involve in order to achieve the most stable process. The most stable machining process will be used to prove the developed mathematical models. A mathematical relationship between kerf and process parameters is anticipated. The mathematical models in conjunction with experimental data will eventually produce the desired theory. The developed process and mathematical model of kerf is a breakthrough in fabricating products such as micro tools, molds etc. with optimum kerf and high dimensional accuracy. The successful completion of this research will contribute to the environmental friendly micromachining process.

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Chaubey, Sujeet Kumar y Kapil Gupta. "A review on Wire-EDM of bio titanium". Reports in Mechanical Engineering 4, n.º 1 (3 de septiembre de 2023): 141–52. http://dx.doi.org/10.31181/rme040103092023c.

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Nonconventional machining technologies have been found viable to manufacture various products from a wide range of engineering materials. Wire electric discharge machining (WEDM), also known as Wire-EDM, is one of the important thermal type nonconventional machining technologies. Wire-EDM is being preferably used by manufacturers to produce biomedical devices including bio and dental implants. This paper presents an overview of capabilities of wire-EDM type nonconventional machining technology for the precise machining of titanium and its alloys for biomedical applications. It reviews the important research work conducted on machining titanium alloys by wire electrical discharge machining (WEDM). Their findings and achievements are discussed to encourage further research and development in the biomaterial machining area.

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Phan, Nguyen Huu. "ANALYSIS OF SURFACE LAYERS OF HOT – FORGING DIES OF SKD61 STEEL FABRICATED BY DIE – SINKING ELECTRICAL DISCHARGE MACHINING USING COPPER AND TITANIUM ELECTRODES". Vietnam Journal of Science and Technology 54, n.º 5A (22 de marzo de 2018): 19. http://dx.doi.org/10.15625/2525-2518/54/5a/12057.

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Electrical discharge machining (EDM) is a popular unconventional method for manufacturing tools, molds, and dies. Currently, the surface layer of the hot die after EDM needed to be polished to remove the layer of » 50 mm. This is accepted according to practical experience and the lack of scientific basis because of limited research on the surface layer quality of the products after EDM and the study is focused on the evaluation of the product quality in the final processing. This study is aimed at the investigation of performance and structure of the surface layer in hot-forging die following die-sinking EDM. The machining conditions included the use of copper (Cu) and titanium (Ti) as electrode materials. A cross-sectional micrographic and hardness analysis was performed, as well as surface roughness measurements, in order to study the thermally affected zones of the hot-forging die surface layer of the SKD61 steel after EDM using oil as the dielectric fluid. The results showed that the performance of the die was reduced due to changes in the hardness and the chemical composition of the workpiece surface. The surface quality of hot-forging die after EDM with Ti or Cu electrode are similar. In this case, EDM using Ti electrode to improve the quality of hot die surface layer was unreasonable.

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Hourmand, M. y M. Y. Noordin. "Micro-Electrode Fabrication Process Using EDM". Advanced Materials Research 845 (diciembre de 2013): 980–84. http://dx.doi.org/10.4028/www.scientific.net/amr.845.980.

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Micro-machining is a fundamental process for manufacturing parts and products with dimensions of between 1 to 999 μm. Micro-Electro Discharge Machining (micro-EDM) has been used for producing of parts, molds, dies, cavities and complex three dimensional shape regardless of hardness and strength. Micro-electrodes are required for these purposes and usually micro EDM machines are used for fabricating them. Moving block electro discharge grinding (Moving BEDG) is one of the processes that can be used to fabricate micro-electrode. In this study a conventional EDM machine is used for fabricating the micro-electrode. Based on the characteristics of this machine some changes need to be applied to the moving BEDG for micro-electrode fabrication. Modification made to the moving BEDG include changing the direction of movement and control gap, use of roughing, semi finishing and finishing electrodes in one electrode. Consequently set up and machining time was decreased due to the use of roughing, semi finishing and finishing parameters. Finally, high aspect ratio micro electrode with diameter of 160.8μm was fabricated. As this process is simple and does not require high investment for special equipment; it can be used even by an ordinary workshop equipped with a conventional EDM machine.

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Subbian, Kanmani Subbu, Ramkumar Janakarajan y Dhamodaran Santhanagopalan. "Plasma Temperature and Electron Density of Dry µ-EDM on Stainless Steel and Silicon: A Comparison". International Journal of Automation Technology 5, n.º 1 (5 de enero de 2011): 45–51. http://dx.doi.org/10.20965/ijat.2011.p0045.

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Fabricating micro/nano-features in devices and largescale production with short lead times is challenging, and many individual and hybrid processes have been developed to meet this challenge. Among nonconventional processes, micro-electric discharge machining (µ-EDM) has many advantages due to the possibility of precise and accurate 2D and 3D machining of complex shapes. Dry µ-EDM is used to process assembled or semi-assembled products. Attempts are being made to improve the µ-EDM process, and further improvement is possible through better understanding the role of discharge plasma in the machining process. We studied plasma and crater characteristics during dry µ-EDM, calculating plasma parameters for different discharge energies using optical emission spectroscopy. Line pair method and modified Saha equations are used to calculate plasma temperature and electron density respectively. Craters were morphologically analyzed using scanning electron microscopy (SEM), and plasma and crater characteristics on stainless steel and silicon were compared.

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Straka, Luboslav y Gabriel Dittrich. "Design of Manufacturing Process of Mould for Die Casting by EDM Technology with the Computer Aided". International Journal of Engineering and Management Sciences 5, n.º 2 (15 de abril de 2020): 57–63. http://dx.doi.org/10.21791/ijems.2020.2.7.

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At present, we cannot imagine a modern production process without computer support. At the same time, its integral part is the implementation of advanced and highly sophisticated production processes and technologies. Their aim is first and foremost to ensure quality production of products with high economic efficiency of the production process. EDM technology is one of the currently active progressive technologies. This is a technology that in practice is characterized by high product quality. The high quality of products not only through this progressive technology, but also other, whether conventional or progressive, is difficult to achieve without computer support. The aim of the paper is therefore to demonstrate the process of manufacturing a die-casting mould using progressive EDM technology using computer support.

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Tebni, Wissem, M. Boujelbene y E. Bayraktar. "Parametric Approach Model for Determining Electrical Discharge Machining (EDM) Conditions: Effect of Cutting Parameters on the Surface Integrity". Advanced Materials Research 83-86 (diciembre de 2009): 725–37. http://dx.doi.org/10.4028/www.scientific.net/amr.83-86.725.

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Electrical discharge machining (EDM) is one of the earliest non-traditional machining processes. EDM process is based on thermoelectric energy between the work piece and an electrode. There are various types of products which can be produced by using the EDM such as dies and moulds. Today many parts used in aerospace and automotive industry and also final processes of surgical components can be finished by EDM process. A simple and easily understandable model was proposed for predicting the relative importance of different factors (composition of the steels and Electro Discharge Machining processing conditions) in order to obtain an efficient pieces. A detail application on the tool steels machined by EDM was given in this study. This model is based on thermal, metallurgical and mechanical and also in situ test conditions. It gives detail information on the effect of electrochemical parameters on the surface integrity and sub-surface damage of the material (Heat Affected Zone, HAZ), the level of residual stresses, and the surface texture. This approach is an efficient way to separate the responsibilities of the steel maker and machining process designer for increasing the reliability of the machined structures.

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Baghel, Rupali. "Machinability of Non-Conductive Ceramic by EDM: A Review". IOP Conference Series: Materials Science and Engineering 1224, n.º 1 (1 de enero de 2022): 012003. http://dx.doi.org/10.1088/1757-899x/1224/1/012003.

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Abstract AdvancedCeramics are gaining a foothold in the lightweight aerospace, electronics, and structural engineering component markets. These ceramics could be extensively used in modern industry, such as ballistic body armour, ceramic carbon fibre composite automoti ve brakes, diesel particulate filters, prosthetic limbs, piezoelectric sensors, and computer memory products, due to their higher compressive strength, resistance to abrasion, lower thermal expansion coefficient, higher density, and chemical stability. Ceramics are notori ously difficult to handle due to the increased hardness and brittleness. Low electric-conductive ceramics, on the other hand, can be machined using the EDM technique, in which plasma energy is used to accurately remove the material by continuous sparking between the surface and the electrode submerged in dielectric. It is observed that EDM can be applied to the material having electrical resistivity below 100 ?.cm. Most recently it has been observed that EDM could be applied to insulating ceramics too. An attempt has been made in this paper to critically review the machining of ceramics by the EDM process.

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Pereira Navaza, P., E. Ares, Jose L. Diéguez y A. Pereira. "Manufacture of Electrodes for Electro-Discharge Machining (EDM) of Complex Surfaces in Moulds". Materials Science Forum 526 (octubre de 2006): 145–50. http://dx.doi.org/10.4028/www.scientific.net/msf.526.145.

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In the present consumer, the personalization and originality of the made polymeric products it is one of the area in which dwells efforts of investigation take it pleases. Many companies uses plastic recipients that dog be painted or wrapped with to plastic but to however, the development of artistic relief plows not developed. The biggest problem was obtaining an artistic process out. In manual a way, it is very complicated, and there was not specific software to develop this kind of work because they were designed to carry out tech-line pieces. The aim of this work is to develop to method to produces to 3-D relief, an artistic appears and some letters, in a mould.

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Abbas, Norliana Mohd y Darius Gnanaraj Solomon. "Electrical Discharge Machining (EDM): Selection of Dielectric in Machining ASSAB 718HH". Advanced Materials Research 622-623 (diciembre de 2012): 520–24. http://dx.doi.org/10.4028/www.scientific.net/amr.622-623.520.

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Electrical Discharge Machining (EDM) in Malaysia is widely used in mould making industries. Parts for automotive, defence and telecommunication industries are also other examples of the products produced. The process is based on removing material from a part by a series of repeated electrical discharges between a tool called electrode and the work piece with the presence of dielectric. The dielectric serves as transportation of removed particles, remains electrically non-conducting until the breakdown voltage is reached, reconditions the dielectric strength, increases the energy density in plasma channel and cools the electrode. This paper presents the machining of ASSAB 718HH work pieces with copper tool using EDM die sinking method. Three commercial EDM dielectrics; Kerosene, Novis and Amoil were tested and comparison between material removal rate (MRR), tool wear ratio (TWR) and surface finish (SF) are given. Through Pugh Method, result shows that ASSAB 718HH is best machined with Novis.

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Yi, Guanwei, Guangyu Guo, Mingfang Zhang y Mengyou Huo. "Simulation and Experimental Research on Low-Frequency Vibration and Rotation Assisted Micro-EDM Gap Flow Field". Journal of Physics: Conference Series 2463, n.º 1 (1 de marzo de 2023): 012032. http://dx.doi.org/10.1088/1742-6596/2463/1/012032.

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Abstract As the depth increases when the Electrical Discharge Machining (EDM) process is applied to the machining of micro-holes, it becomes more difficult to remove the corrosion products, leading to a decrease in machining efficiency. In order to study the mechanism and effect of the additional low-frequency vibration and rotating motion of the electrode on the improvement of micro-EDM chip removal, this paper firstly conducted a simulation study on the flow field of the machining gap, and analyzed the pressure, velocity and electrical erosion of the gap flow field by adding different auxiliary motions. The simulation results show that the auxiliary motion has a greater promotion effect on the elimination of electro-erosion products; after further experimental tests, the processing results show that adjusting the appropriate vibration frequency and rotation speed can greatly improve the chip removal ability, and then the processing efficiency has been greatly improved.

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Jatti, Vijaykumar S., Nitin K. Khedkar, Vinaykumar S. Jatti y Pawandeep Dhall. "Investigating the effect of cryogenic treatment of workpieces and tools on electrical discharge machining performance". AIMS Materials Science 9, n.º 6 (2022): 835–62. http://dx.doi.org/10.3934/matersci.2022051.

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<abstract> <p>In this competitive world, manufacturers must embrace new technology in order to differentiate their products and capture market leadership. This can be achieved using advanced materials; however, these materials are difficult to machine by using traditional machining processes. A very viable and practical unconventional machining process is electrical discharge machining (EDM). EDM processes need proper selection of input parameters to get optimum productivity aspects, namely, the material removal rate and tool wear rate. Thus, the present study aims at investigating the effect of cryogenically treated work pieces and tools, gap currents, gap voltages, pulse on time and pulse off time on the material removal rate and tool wear rate during EDM of Nitinol (NiTi) alloy, Monel (NiCu) alloy and beryllium copper (BeCu) alloy. The experimental results showed that cryogenic treatment significantly improved the electrical conductivity of the workpieces and tool electrodes, which resulted in an enhanced material removal rate and reduced tool wear rate.</p> </abstract>

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Olinik, Ricardo y Paulo Andre de Camargo Beltrão. "Influence of Correlation between Electrical Discharge Machining Parameters with the Formation of Surface Defect’s in Products Machined by EDM". Advanced Materials Research 223 (abril de 2011): 950–59. http://dx.doi.org/10.4028/www.scientific.net/amr.223.950.

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This paper shows a study of correlation between EDM´s parameters with the level of superficial defects development, which can lead to premature failure of die cast mold machined by EDM. The correlation of parameters was determined through experimental matrix that uses the DOE methodology (Design of Experiment). In order to evaluate the surfaces of some machined samples a stereo optical microscopy, SEM (the scanning electron microscope) and a micro hardness profile machine were used. The results show that in the worst machining condition, which is caused by association of long electric discharge pulse time-on and graphite machine-electrode, it is possible to minimize the amount of surface defects, without applying a subsequent machining process such as polishing, just using the reduced time-on´s electric discharge pulse, copper electrode and dielectric fluid with base of hydrocarbon.

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Tanaka, Hidetake, Yuta Fukada y Ryuta Kuboshima. "Feasibility Study of EDM-Assisted Combined Turning for Unidirectional CFRP". International Journal of Automation Technology 16, n.º 5 (5 de septiembre de 2022): 536–42. http://dx.doi.org/10.20965/ijat.2022.p0536.

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Carbon fiber-reinforced plastics (CFRP), which are classified as functional resins, are rapidly replacing conventional materials because of their excellent properties. Typically, they have been used to fabricate components of airplanes or cars. In the field of medicine, the demand for micro-machined products manufactured with lathes is also increasing. However, owing to the significant tool wear caused by the carbon fiber, CFRP machining can result in burrs and inaccuracies in the finished product. The tool wear caused by carbon fiber must be reduced to ensure high dimensional accuracy. In this study, the possibility of combining conventional turning with electric current or electrical discharge machining was explored.

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Olenovych, О. А. "Peculiarities of acid-releasing renal function of rats in the dynamics of experimental diabetes mellitus with underlying pharmacological blockade of renin-angiotensin-aldosterone system". Reports of Vinnytsia National Medical University 24, n.º 3 (12 de octubre de 2020): 381–88. http://dx.doi.org/10.31393/reports-vnmedical-2020-24(3)-02.

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Annotation. The aim of the study was to explore the peculiarities of acid-releasing renal function of rats in the dynamics of alloxan-induced experimental diabetes mellitus (EDM) with underlying pharmacological blockade of the renin-angiotensin-aldosterone system (RAAS). The experiments were carried out on 78 white non-linear mature male rats with 11-, 26- and 46-day long alloxan-induced EDM with underlying pharmacological blockade of RAAS by administration of captopril. The study of acid-releasing renal function was provided under the condition of water 2-hour diuresis by changes in urine pH, excretion of titrated acids (TA), ammonia and active hydrogen ions with calculations of their excretion and ratio indices, standardization per 100 μl of glomerular filtrate (GF) volume. It was found that after administration of captopril to rats with 11-day long EDM urine pH, excretion of active hydrogen ions, ammonia excretion increased, TA excretion reduced, including it standardized by the volume of GF, as well as standardized excretion of ammonium compounds. After captopril administration to the animals with a 26-day long EDM, urine pH and TA excretion raised, and the excretion of ammonium and hydrogen ions decreased, still exceeding the control values. Standardized by GF, these indices changed similarly. After pharmacological blockade of RAAS on the 46th day of EDM urine pH, TA excretion, including it standardized by GF, excretion of hydrogen ions enhanced. Excretion of ammonium compounds, including it standardized by GF, and standardized excretion of hydrogen ions declined as compared with control parameters. Thus, the intensification of acid-release at the early stages of EDM is systemic by character and develops due to glomerular hyperfiltration, overload of the nephron with acidic products of metabolism and accompanied by structural intactness of the tubular apparatus of the kidneys. Prolonged glomerular hyperfiltration, probably, is the initiating damaging factor for the tubular apparatus of the diabetic kidney, which in 26-day long EDM is accompanied by the inability of enzyme systems of tubular epithelial cells of proximal tubules, mostly, to provide adequate ammoniogenesis, despite the high efficacy of renal transport mechanisms of acid-release. Proximal tubulopathy on the background of augmented aciduria in animals with 46-day long EDM causes relative functional insufficiency of the distal tubular apparatus.

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Shlykov, E. S., T. R. Ablyaz, K. R. Muratov y D. I. Tokarev. "Influence of Wire EDM on the Surface Roughness of Products Obtained by Laser Surfacing". Russian Engineering Research 40, n.º 10 (octubre de 2020): 876–77. http://dx.doi.org/10.3103/s1068798x20100263.

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Chen, Qing, Zhengwu Jiang, Hehua Zhu, J. Woody Ju, Zhiguo Yan y Yaqiong Wang. "An Improved Micromechanical Framework for Saturated Concrete Repaired by the Electrochemical Deposition Method considering the Imperfect Bonding". Journal of Engineering 2016 (2016): 1–11. http://dx.doi.org/10.1155/2016/1894027.

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The interfaces between the deposition products and concrete are not always well bonded when the electrochemical deposition method (EDM) is adopted to repair the deteriorated concrete. To theoretically illustrate the deposition healing process by micromechanics for saturated concrete considering the imperfect interfaces, an improved micromechanical framework with interfacial transition zone (ITZ) is proposed based on our recent studies. In this extension, the imperfect bonding is characterized by the ITZ, whose effects are calculated by modifying the generalized self-consistent model. Meanwhile, new multilevel homogenization schemes are employed to predict the effective properties of repaired concrete considering the ITZ effects. Moreover, modification procedures are presented to reach the properties of repaired concrete with ITZs in the dry state. To demonstrate the feasibility of the proposed micromechanical model, predictions obtained via the proposed micromechanical model are compared with those of the existing models and the experimental data, including results from extreme states during the EDM healing process. Finally, the influences of ITZ and deposition product on the healing effectiveness of EDM are discussed based on the proposed micromechanical model.

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30

Gupta, Kapil. "Investigation on Fabrication of SS316 Gear by Wire-EDM". MATEC Web of Conferences 346 (2021): 01044. http://dx.doi.org/10.1051/matecconf/202134601044.

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Manufacturing of miniature gears with good accuracy and quality, and at low cost is a challenging task for traditional manufacturing processes. Wire-cut electric discharge machining (WEDM) has the capacity to machine any conductive material to fabricate typical shaped products like gears with high level of accuracy and quality. In present research, stainless steel (SS) alloy 316 is used to fabricate miniature gears by WEDM. The experimental array is designed according to Response Surface Methodology (RSM) based central composite face centered (CCFC). Four input parameters namely servo feed (SF), duty factor (DF), servo voltage (SV) and wire feed (WF) with three levels each are used for experimental array to investigate the process performance in terms of cutting rate (CR), and product i.e. gear quality in terms of mean roughness depth (Rz) and dimensional deviation (DD). After WEDM parameter optimization, confirmation experiments are performed at the parametric setting by considering equal importance to all response variables. A very close agreement between the experimental and predicted values have been observed.

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31

Kaneko, Kensei, Ken Yamashita y Yasushi Fukuzawa. "The Machining Characteristics of Insulating AlN Ceramics by EDM". Key Engineering Materials 523-524 (noviembre de 2012): 328–31. http://dx.doi.org/10.4028/www.scientific.net/kem.523-524.328.

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AlN ceramic materials have high thermal conductivity and electrical insulation, prompting consideration of their use as a semiconducting material. Although AlN should be machined with a high accuracy of form and dimension to achieve products and components with requisite precision, mechanical and other machining methods such as the micro blasting technology or laser method cannot be used because of the brittleness and high thermal conductivity of AIN. Recently, we have succeeded in machining many insulating ceramics by EDM with the assisting electrode method. We have already machined many insulating ceramic materials such as Si3N4, ZrO2 and Al2O3. However, inferior machining characteristics were obtained with AlN than with other materials. In this study, the effects of several electrical discharge conditions were examined to obtain better machining properties, such as high material removal rate and a low electrode wear ratio. It was found that machining time decreased with an increase in capacitance, while the electrode wear ratio increased. In addition, the machining hole profiles were straight along the depth direction, and the shape of holes was non-tapered

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32

Sundriyal, S., Vipin y RS Walia. "Experimental investigation and performance enhancements characteristics of gaseous assisted powder mixed near dry electric discharge machining". Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering 235, n.º 4 (18 de enero de 2021): 1048–58. http://dx.doi.org/10.1177/0954408920988424.

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Gaseous assisted powder mixed near dry EDM (GAPMND-EDM) is one of the recent hybrid technologies, which not only enhance the machining performance, but at the same time, high quality products with better surface quality characteristics can also be achieved. In this study, the response parameters were material removal rate, surface finish, micro hardness and residual stress. It was found that the maximum material removal rate (MRR 3.379 mg/min) was achieved with combination of (dielectric) oxygen gas with graphite powder while lowest surface roughness (SR 1.11 μm) was found to be with dielectric argon gas with graphite additives. Highest micro hardness (MH) and lowest residual stress (RS) was 820.30 Vickers hardness number (VHN) and 229 MPa found with dielectric combination of zinc additives with argon gas.

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33

Nieciąg, Halina, Rafał Kudelski y Krzysztof Zagórski. "The use of artificial intelligence to model the geometric state of the surface after EDM machining of tool steels". AUTOBUSY – Technika, Eksploatacja, Systemy Transportowe 19, n.º 12 (31 de diciembre de 2018): 570–74. http://dx.doi.org/10.24136/atest.2018.454.

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The article presents the application of artificial intelligence methods in the form of artificial neural networks (SSN) for modeling the geometrical state of a product shaped in the EDM process. The SSN with different architecture and different learning algorithms were implemented. The models' quality and their effectiveness in predicting some geometrical features of tool steel products were examined.

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34

Ghani, Jaharah A., Geok Yong Goh y Che Hassan Che Haron. "Surface Integrity of AISI H13 in End Milling and Electrical Discharge Machining Process". Advanced Materials Research 264-265 (junio de 2011): 1044–49. http://dx.doi.org/10.4028/www.scientific.net/amr.264-265.1044.

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Industries are forced to seriously evaluate their design and manufacturing of their products due to the competition in the marketplace. Product characteristics such as tolerance specification, appearance, and service life now become a major concern for machined components. One of the most important aspects in machined components is surface integrity. It involves mainly the surface roughness and micro hardness changes during machining operation, which should be controlled and monitored to fulfill the product functions and customer needs. This paper presents the comparison effect of the end milling and EDM parameters on the surface integrity of AISI H13 tool steel (HRC50 3). The parameters studied were the cutting speed (224 m/min – 280 m/min), feed rate (0.25 mm/tooth) and depth of cut (0.3 mm-0.8 mm for end milling process. Whereas for EDM, the parameters studied were the peak current (1 and 4 A), pulse ON-time (6 and 12 μs), and pulse OFF-time (2 μs). The electrodes used were graphite and copper. In this study, the workpiece surface and recast layer were examined using an optical microscope. The observation revealed that both processes of end milling and EDM had cause the formation of three layers structure, i.e. white, martensite quenched and bulk material layers. The subsurface alteration for EDM process is considered rigorous as compared with the end milling process. Damages beneath the machined surface such as micro cracks and void were observed for EDM process, and microscopic pitting and surface roughning for end milling process. The measurement of the microhardness beneath the machined surface of AISI H13 was carried out using Vickers microhardness tester to characterize its mechanical properties. It was found that the highest hardness of 1010 Hv was in the white layer, and hardness of martensite quench layer was 423 Hv, which was lower than the bulk material layer of 430 Hv in EDM process. Whereas, a maximum of 550 Hv was measured directly underneath the generated surface, i.e. 30% more as compared to the hardness of the basic material in the end milling process.

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Ablyaz, Timur Rizovich, Evgeny Sergeevich Shlykov y Karim Ravilevich Muratov. "Improving the Efficiency of Electrical Discharge Machining of Special-Purpose Products with Composite Electrode Tools". Materials 14, n.º 20 (15 de octubre de 2021): 6105. http://dx.doi.org/10.3390/ma14206105.

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The article is devoted to increasing the efficiency of electrical discharge machining of special-purpose items with composite electrode tools. The subject of research is the parameter of the roughness of the processed surface and the work of the electro-discharge machining (EDM) of 40Crsteel in various modes of electrical discharge machining. The aim of the work is to increase the efficiency of the process of copy-piercing electrical discharge machining of parts introduced into the composition of a special-purpose product and the use of electrode tools with the introduction of 20% graphite. Experimental studies were carried out using the method of a full factorial experiment with a subsequent regression analysis. The experiments were carried out using a copy-piercing Smart CNC EDM machine, a tool electrode, and a profile composite electrode. Empirical dependencies were established, reflecting the relationship between the processing modes, productivity, and surface roughness parameter after processing. A theoretical model for calculating the roughness parameter was developed, which makes it possible to predict the quality of the processed surface with a reliability of 10–15%. To ensure the required ratios of the quality of the processed surface at the maximum performance indicators, technological recommendations were obtained, as a result of which a 35% reduction in machine time was achieved when processing the “screw” part with the required indicators of surface quality.

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36

Abbas, Ahmed Mohammed y Ali Abbar Khleif. "EDM Electrode Design and Analysis to Enhance Process Performance". Tikrit Journal of Engineering Sciences 30, n.º 4 (13 de diciembre de 2023): 145–52. http://dx.doi.org/10.25130/tjes.30.4.15.

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Electric discharge machining (EDM) is regarded as one of the most energy-efficient manufacturing processes for exceptionally accurate processing of any electrically conductive material, regardless of mechanical properties. EDM is a non-contact process utilized in various industries, including aerospace, industrial, instruments, molds, dies, and medical tools; also, it is beneficial for hard materials with simple or proficient geometries and shapes. Although EDM is for machining "difficult to machine" metals, such as those used in the mold and die industries, metal properties indicate potential capability in the domain of surface modification due to the electrical spark between the tool and the work material. This paper investigates the machining of Alloy steel X210 by using the most affecting parameters and how electrode angles contribute to responses, as MRR, Electrode wear ratio, and surface finish, which the manufacturing industry uses to make die tools, molds, automotive parts, and other products. Electrodes with angles of 0o and 90o are used to machine workpieces using WEDM (dk7740). Electrode Angle, peak discharge current, pulse-on time, and pulse-off time were controllable parameters in this study. While all other criteria are constant, variables have been studied. The effects of the four aspects on the four variables were statistically analyzed using ANOVA by MINITAB. Regression models for the responses were developed. Regression mathematical models have been developed for Alloy steel X210 workpieces to increase productivity and industry results.

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37

Yu, Z. Y., K. P. Rajurkar y A. Tandon. "Study of 3D Micro-Ultrasonic Machining". Journal of Manufacturing Science and Engineering 126, n.º 4 (1 de noviembre de 2004): 727–32. http://dx.doi.org/10.1115/1.1813482.

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Many manufacturing processes, such as lithography, etching, laser, electrical discharge machining (EDM), and electrochemical machining (ECM), are being applied to produce the meso- and microscale parts and products. Materials such as silicon, glass, quartz crystal, and ceramics are being increasingly used in microelectromechanical system (MEMS) devices. Ultrasonic machining (USM) offers an attractive alternative to machine some of the hard and brittle materials. However, the tool wear in micro-ultrasonic machining adversely affects the machining accuracy. Therefore, it is necessary to account for and to compensate the tool wear during machining. This paper reports the feasibility of applying the uniform wear method developed for micro electrical discharge machining and its integration with CAD/CAM to microultrasonic vibration process for generating accurate three-dimensional (3D) microcavities. Experimental results show that the tool shape remains unchanged and the tool wear has been compensated.

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38

Yudo, Eko y Zaldy Kurniawan. "Analisa Kekasaran Permukaan Pada Proses Edm Sinking Menggunakan Metoda Response Surface Methodology". Manutech : Jurnal Teknologi Manufaktur 10, n.º 01 (17 de mayo de 2019): 17–23. http://dx.doi.org/10.33504/manutech.v10i01.54.

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The development of technology in the manufacturing sector is very fast, the market demand is diverse will the needs of products and components with complex shapes and high level of precision and hardness of material that has high strength. High degree of hardness and precision are widely used nonconventional EDM machine sinking. the electrode wear rate (LKE) and surface roughness (KP) are at least the performance of the EDM sinking machine process to be achieved. The study was conducted to determine the contribution of process parameters in order to reduce the variation of response parameters simultaneously and to determine the appropriate process parameter setting value. Parameters varied current, on time, off time and machining voltage. This research uses experimental design from Response Surface Methodology (RSM) method. And obtained the most refined Ra roughness results on Ton 100 µs, and Toff 15 µs with 10 A Ampere, and the roughest Ra roughness is obtained at Ton 300 µs, and Toff 15 µs with Ampere 20 A.

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39

Kaneko, Kensei y Yasushi Fukuzawa. "Characteristics of Micro EDM for Insulating Aluminum Nitride Ceramics". Advanced Materials Research 579 (octubre de 2012): 86–91. http://dx.doi.org/10.4028/www.scientific.net/amr.579.86.

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Aluminum Nitride (AlN) ceramic materials have high thermal conductivity and electrical insulation, prompting consideration of their use as a semiconducting material. Although AlN should be machined with a high accuracy of form and dimension to achieve products and components with requisite precision, mechanical and other machining methods such as the laser method cannot be used because of the brittleness and high thermal conductivity of AIN. Recently, we have succeeded in machining many insulating ceramics by sinking (SEDM) and Wire-Electrical Discharge Machining (WEDM) with the assisting electrode method. We have already machined many insulating ceramic materials such as Si3N4, ZrO2 and Al2O3. However, inferior machining characteristics were obtained with AlN than with other materials. In this study, the effects of several electrical discharge conditions were examined to obtain better machining properties, such as high material removal rate and a low electrode wear ratio. It was found that machining time decreased with an increase in capacitance, while the electrode wear ratio increased. The electrode wear ratio of the W electrode was low, suggesting that it is suited for accurate machining of AlN. Additionally, the electrically conductive layer was analyzed using Energy Dispersive X-ray Spectrometry (EDS) and X-ray Diffraction (XRD). As a result, the architectural component of the EDMed AlN surface is considered mostly Al that is resolution of the workpiece. Therefore, in the EDM of AlN using the assisting electrode method, machinability using deionized water may be superior to dielectric oil. To investigate the effect of the dielectric working fluid, AlN was machined using deionized water and dielectric oil. In the case of machining with deionized water, the removal rate was faster and electrode wear ratio was lower, compared to dielectric oil.

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40

Nieciąg, Halina, Rafał Kudelski y Krzysztof Zagórski. "Pareto ANOVA analysis of geometrical features of the products machined during EDM adaptative cycle in the Integrated Manufacturing System". Pomiary Automatyka Robotyka 21, n.º 4 (30 de diciembre de 2017): 67–74. http://dx.doi.org/10.14313/par_226/67.

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41

Shlykov, Evgenii, Timur Ablyaz y Karim Muratov. "Ensuring the Accuracy of Wire-cutting EDM processing of Products made of Hard-to-Handle Materials". Metal Working and Material Science 22, n.º 3 (15 de septiembre de 2020): 6–17. http://dx.doi.org/10.17212/1994-6309-2020-22.3-6-17.

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42

Amrullah, Amrullah y Rahman Hakim. "THE EFFECT OF THE PULSE CURRENT IN WIRE ELECTRIC DISCHARGE MACHINE ON MEASUREMENT ERROR TOWARD ALUMINUM ALLOY: AN EXPERIMENTAL STUDY". JURNAL INTEGRASI 12, n.º 2 (31 de octubre de 2020): 112–15. http://dx.doi.org/10.30871/ji.v12i2.2398.

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This research investigates the measurement error on Wire EDM cutting products to find the pulse current's problem-solving. One of the machining parameters that affect the precision of Wire EDM is the magnitude of the current. The experimental study carried out by using the pulse current started from 4-Ampere up to 8-Ampere as the research parameters. A chamfer dimension on 6061 Aluminum alloy was investigated with the gd&t method with ISO 5459 and ISO 1101 standard. Statistic method applied and processed on Minitab with Shapiro-Wilk parameter for normal distribution. These experimental studies have a normal distribution that finds the phenomena of 8-Ampere of pulse current generate a large measurement error. Furthermore, in these experimental studies, the usage of a Profile Projector generates a massive measurement error, up to 64.5% compared with CMM. A strong commitment to calibrate the Profile Projector up to date to maintain the machining quality.

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43

Sadigh, Bahram Lotfi, Samad Nadimi Bavil Oliaei y Samad Dadvandipour. "An Ontology Based Semantic Machine Tool Selection for Multi Scale Wire EDM Processes". Solid State Phenomena 261 (agosto de 2017): 470–77. http://dx.doi.org/10.4028/www.scientific.net/ssp.261.470.

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Manufacturing high-tech complex products which contain multi-scale complex features without outsourcing considering company's capabilities is quite difficult. Outsourcing some processes to other independent companies is a crucial step toward fabricating a product. To find the most suitable partner company several critical parameters should be considered including company machine-park, skilled personnel, infrastructure, etc. Having comprehensive information about necessary machine tool(s) to outsourcing related manufacturing process is essential. Focusing on Wire Electro Discharge Machining (WEDM) process, the objective of this paper is to introduce a platform to store and analyze information and data about part(s) and machine tools and show out coming results as a list of capable machine tools to produce the desired parts with multi-scale features.

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44

Rahman, Mustafizur. "Special Issue on Micro/Nano Machining – Processes, Systems and Control". International Journal of Automation Technology 5, n.º 1 (5 de enero de 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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Kumar, Sandeep, Subramanian Dhanabalan, Wilma Polini y Andrea Corrado. "Form variation management of products in Inconel 718 obtained through EDM process with circular shape brass electrodes". International Journal of Machining and Machinability of Materials 24, n.º 1/2 (2022): 165. http://dx.doi.org/10.1504/ijmmm.2022.122789.

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46

Corrado, Andrea, Sandeep Kumar, Subramanian Dhanabalan y Wilma Polini. "Form variation management of products in Inconel 718 obtained through EDM process with circular shape brass electrodes". International Journal of Machining and Machinability of Materials 24, n.º 1 (2022): 1. http://dx.doi.org/10.1504/ijmmm.2022.10045605.

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47

Sundriyal, Sanjay, Vipin y Ravinderjit Singh Walia. "Experimental Investigation of the Micro-hardness of EN-31 Die Steel in a Powder-Mixed Near-Dry Electric Discharge Machining Method". Strojniški vestnik – Journal of Mechanical Engineering 66, n.º 3 (15 de marzo de 2020): 184–92. http://dx.doi.org/10.5545/sv-jme.2019.6474.

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The Powder-Mixed Near-Dry Electric Discharge Machining (PMND-EDM) methodology has proven to be efficient in terms of machining rate, surface morphology, and environmental friendliness, unlike traditional EDM. In this study, the presence of a conductive metallic powder (zinc) in the dielectric medium was responsible for changing the topography of the workpiece (EN-31) and resulted in a higher micro-hardness value of the machined component. In this research, an approach has been made to optimize the significant process parameters by using a Taguchi L9 orthogonal array (OA) to obtain machined components with higher values of micro-hardness, which was measured in terms of Vickers hardness HV. The selected process parameters were tool diameter, mist flow rate, metallic powder concentration, and dielectric mist pressure. By introducing foreign particles (metallic powder), the topography of the machined products has been improved, and the micro-hardness value was found to be enhanced. The confirmation experiment was performed for optimal process parameter settings, and the enhanced microhardness value was found to be 506.63 HV in the machined EN-31 die steel.

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48

KiselevG., M. G., P. S. Bohdan, M. M. Kryshnev y V. P. Semenkovich. "INFLUENCE OF EDM WORN SURFACE OF THE WORKING PART OF STEEL BORON TOOTH TO RESTORE ITS CUTTING ABILITY". Science & Technique 16, n.º 3 (26 de mayo de 2017): 189–95. http://dx.doi.org/10.21122/2227-1031-2017-16-3-189-195.

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The article is devoted to the experimental evaluation of the efficacy of electrical discharge machining (modification) worn cylindrical working surface of the steel of boron in order to restore its cutting ability. It provides basic informationabout steel dental forests, including their structure and the main stages of production. It is noted that for such resource hog maximum computing time is about 9 minutes and then further worn drills are used and recycled. Based on an analysis of previous studies on the use of EDM surface modification of the wire, tape and disk recovery tools grounded prospect worn cutting ability of the working surface of the steel by its boron EDM with a view to its use in dental practice as well as in the production of dental products. Provides basic information about how to conduct experimental studies, including a description of the device for modifying the EDM worn working surface boron, as well as the device to determine its cutting ability on the intensity of cutting them a sample of the PCB. It was established experimentally that the resulting EDM modifying worn working surface boron therein forming wells having on the edges of the metal beading beyond the original contour of the surface, the height of which increases as the process of modifying U voltages on the storage capacitor, which leads to an increase in surface finish diameter boron. It has been shown that these spatter justified regarded as a kind of cutting elements (teeth) on the modified surface of the boron, giving it a worn surface of the cutting ability. It was established experimentally that the spark erosion boron worn surface modification can restore its cutting performance with respect to the original when U = 75 to 33.3%, and when U = 120 V - 43%, indicating a relatively high recovery efficiency of the proposed method of cutting the ability of the worn surface of steel dental burs.

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Elmenshawy, S. K., Mohammad A. Younes y Hassan El-Hofy. "Electro Discharge Machining of AL₂O₃ Based Ceramic". Key Engineering Materials 625 (agosto de 2014): 511–17. http://dx.doi.org/10.4028/www.scientific.net/kem.625.511.

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Products such as parts of die sets and cutting tool inserts are normally produced with complex shapes in materials of high hardness and wear resistance such as ceramics. Electro discharge machining (EDM) can be used to manufacture complex shapes in high hardness materials, but the material should be conductive. Being conductive, Aluminum oxide (Al2O3) based ceramics represent a good alternative for manufacturing hard complex shape parts. However, the integrity of the produced surfaces and the material removal rate need to be investigated. A full factorial experimental design was used to investigate the effect of some selected process variables, namely; pulse-on time, pulse-off time, and pulse current on specific EDM performance measures. The considered performance measures are; crater diameter (D), material removal rate (MRR), and average roughness value (Ra). An analysis of variance (ANOVA) test was carried out to evaluate the experimental results. Empirical models have been developed using DESIGN EXPERT V.8 to predict the average crater diameter (D), material removal rate (MMR), and average roughness value (Ra). Machining conditions that should result in optimum process performance measures have also been considered.

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Rachman, Farizi Rachman, Tri Andi Setiawan, Bayu Wiro Karuniawan y Risma Aris Maya. "Penerapan Metode Taguchi Dalam Optimasi Parameter Pada Proses Electrical Discharge Machining (EDM)". J Statistika: Jurnal Ilmiah Teori dan Aplikasi Statistika 12, n.º 1 (31 de julio de 2019): 7–12. http://dx.doi.org/10.36456/jstat.vol12.no1.a1991.

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EDM is a non-conventional machining process with feeding material carried out by electric spark (spark) through a gap between the electrode and the workpiece containing liquid in the electric. The usefulness of the liquid is as a medium for rinsing the remnants of erosion material, electrodes and workpieces as electrical conductors. In the manufacturing industry, EDM is widely used for the manufacture of products that demand the quality of surface roughness resulting from smooth cutting and high precision. The Taguchi method is one method in experimental design that can be used to control product quality. This study considers 3 parameters, namely gap voltage, on time, and off time on the SKD-11 material as one of the 13 mm thick dies / dies. This study uses the Taguchi method to obtain optimal parameters with smaller criteria better. Based on the table above the highest voltage parameter gap at level 1 which is 30 volts, the parameters at the most agreed time at level 3 are 120 μs and the most difficult off time parameter to be reached at level 1 is 20 μs to roughness. EDM adalah suatu proses permesinan yang bersifat non konvensional dengan pemakanan material benda kerja yang dilakukan oleh loncatan bunga api listrik (spark) melalui celah antara elektroda dan benda kerja yang berisi cairan di elektrik. Kegunaan cairan tersebut adalah sebagai medium untuk flushing sisa-sisa partikel material hasil erosi,pendinginan elektroda dan benda kerja serta sebagai konduktor listrik. Dalam industri manufaktur, EDM banyak digunakan untuk pembuatan produk-produk yang menuntut kualitas kekasaran permukaan hasil pemotongan yang halus dan kepresisian yang tinggi. Metode Taguchi merupakan salah satu metode dalam desain eksperimen yang dapat digunakan untuk mengendalikan kualitas produk. Penelitian ini mempertimbangkan 3 parameter yaitu gap voltage, on time, dan off time pada pengerjaan material SKD-11 sebagai salah satu bahan pembuatan cetakan/dies dengan tebal 13 mm. Penelitian ini menggunakan metode Taguchi untuk mendapatkan parameter yang optimum dengan kriteria smaller is better. Berdasarkan tabel diatas parameter gap voltage paling berpengaruh pada level 1 yaitu 30 volt, parameter on time paling berpengaruh pada level 3 yaitu 120 µs dan parameter off time paling berpengaruh pada level 1 yaitu 20 µs terhadap kekasaran.

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