Download or read book Development of Cylindrical Wire Electrical Discharge Machining Process and Investigation of Surface Integrity and Mechanical Property of EDM Surface Layers written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The cylindrical wire Electrical Discharge Machining (EDM) process was developed to generate precise cylindrical forms on hard, difficult-to-machine materials. A precise, flexible, and corrosion-resistant underwater rotary spindle was designed and added to a conventional two-axis wire EDM machine to enable the generation of free-form cylindrical geometries. A detailed spindle error analysis identified the major source of error at different frequencies. The mathematical models for material removal rate and surface finish were derived. Experimental results indicated that higher maximum material removal rate might be achieved in the cylindrical wire EDM than the 2D wire EDM. Effects of some key process parameters, wire feed rate, pulse on-time and part rotational speed, on the surface finish and roundness are explored. For WC-Co parts, an arithmetic average surface roughness and roundness as low as 0.68 and 1.7 mm, respectively, can be achieved. Surfaces of the cylindrical EDM parts were examined using Scanning Electron Microscopy (SEM) to identify the macro-ridges and craters on the surface. Cross-sections of the EDM parts are examined using the SEM to quantify the recast layer and heat-affected zone under various process parameters. This study also used nanoindentation to investigate the influence of cylindrical wire EDM process on the mechanical properties of WC-Co composite. Multiple indents were conducted on the cross-section of the recast layer, heat-affected zone, and bulk material. The SEM micrographs were used to correlate the individual nano-indent to the measured hardness and modulus of elasticity. The experimental results showed that the heat-affected zone had more compact microstructure less indentation cracking. The recast layer had lower hardness and modulus of elasticity than the original material and heat-affected zone. EDS X-ray and X-ray diffraction were used to analyze the material compositions of the heat-affected zone and recast layer and to unders.
Download or read book Development of Cylindrical Wire Electrical Discharge Machining Process and Investigation of Surface Integrity and Mechanical Property of EDM Surface Layers written by Jun Qu and published by . This book was released on 2002 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt: Keywords: EDM, cylindrical, surface integrity, mechanical property.
Download or read book Development of the Cylindrical Wire Electrical Discharge Machining Process written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Results of applying the wire Electrical Discharge Machining (EDM) process to generate precise cylindrical forms on hard, difficult-to-machine materials are presented. A precise, flexible, and corrosion-resistant underwater rotary spindle was designed and added to a conventional two-axis wire EDM machine to enable the generation of free-form cylindrical geometries. A detailed spindle error analysis identifies the major source of error at different frequency. The mathematical model for the material removal of cylindrical wire EDM process is derived. Experiments were conducted to explore the maximum material removal rate for cylindrical and 2D wire EDM of carbide and brass work-materials. Compared to the 2D wire EDM, higher maximum material removal rates may be achieved in the cylindrical wire EDM. This study also investigates the surface integrity and roundness of parts created by the cylindrical wire EDM process. For carbide parts, an arithmetic average surface roughness and roundness as low as 0.68 and 1.7[micro]m, respectively, can be achieved. Surfaces of the cylindrical EDM parts were examined using Scanning Electron Microscopy (SEM) to identify the craters, sub-surface recast layers and heat-affected zones under various process parameters. This study has demonstrated that the cylindrical wire EDM process parameters can be adjusted to achieve either high material removal rate or good surface integrity.
Download or read book Spin While Burn written by Mohd Shahir Bin Kasim and published by Springer Nature. This book was released on with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2003 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis of Electrical Discharge Machining EDM Process written by C. P. Khatter and published by LAP Lambert Academic Publishing. This book was released on 2012 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: ELECTRICAL DISCHARGE MACHINING (EDM) This book is meant for the students, research scholars and teachers using EDM process. The author presented the detailed study of Input energy parameters include peak current, pulse duration and polarity. Output in the form of surface integrity has been explained in detail, which includes surface roughness, micro hardness and microstructure. The key interest of scientists and technologist is for the higher rates of metal removal with excellent surface finish and low tool wear. The detail study on effect of processing parameters, the nature of cracks observed at the surface and on structural features of cermet after EDM is precisely described. In order to improve the technological performance during EDM process it is essential to understand the formation of cracks, distribution of cracks, size of the cracks, and the structure of cracks to distinguish between fatigue cracks and EDM cracks. The amount of energy available for this process is generated through plasma. Account of the total energy input and out put is explained. It is an ideal text book on practical EDM.
Download or read book Processing surface Integrity fatigue Relationship in Electrical Discharge Machining of Nitinol Shape Memory Alloy written by Jingfu Liu and published by . This book was released on 2016 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nitinol is a nearly equiatomic nickel-titanium shape memory alloy (SMA) with two unique properties, i.e., thermal shape memory and superelasticity. Nitinol has broad applications in medical device, aerospace, actuator, machine tool, and civil industries due to its excellent mechanical properties, high fatigue strength, superior corrosion resistance, and good biocompatibility. However, the grand challenges for manufacturing Nitinol components are manifested in two aspects: (i) Nitinol is exceedingly difficult to machine by mechanical cutting due to the very high material strength, high ductility, low temperature of phase transformation, rapid tool wear, and burr formation; and (ii) The requirements of complex geometry, delicate micro features, and superior surface integrity are very stringent for Nitinol components. Electrical discharge machining (EDM) is a competitive technique to machine difficult-to-cut materials. The contact free nature between the workpiece and the electrode avoids severe tool wear and other issues inherited in mechanical cutting processes. In addition, EDM has the advantages in machining of high aspect ratio and complex structures. However, very few studies have been done on EDM of Nitinol. The influence of EDM induced thermal damage on surface integrity and fatigue performance of Nitinol components has not been understood yet. The fundamental relationship between process-surface integrity-fatigue is still unknown. To reveal the underlying EDM process mechanism and its impact on surface integrity and fatigue of Nitinol components, the research focuses are to: (1) Perform a critical assessment on the challenges and outlooks on EDM of Nitinol shape memory alloys. (2) Investigate the surface integrity characteristics of Nitinol components machined by wire-EDM at main cutting and finish trim cutting. (3) Study the crystallography, compositions, and mechanical properties of white layer and reveal the relationship between microstructure and properties of white layers of EDMed Nitinol. (4) Determine the effect of surface integrity on fatigue performance of EDMed Nitinol components. (5) Create a 3-dimensional finite element model accounting for massive random discharges during EDM to simulate the random discharge phenomenon and process effects.
Download or read book Study of Electro Discharge Machining of Non Conductive Ceramic On Alumina Glass written by Dr. Chandan Deep Singh and published by BookRix. This book was released on 2018-01-12 with total page 101 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electric Discharge Machining (EDM) is very important and prominent machining process among all the newly developed non -traditional machining techniques. This process is extremely useful for “difficult to machine” conducting materials such as heat treated tool steels, composites, super alloys, heat resistant steels, ceramics, carbides, etc. In this technique i.e. in EDM, the material removal of the electrode is achieved through high frequency sparks between the tool and the work-piece immersed into the dielectric. The Material Removal Rate (MRR), Tool Wear Rate (TWR) and surface roughness are some of the important performance parameter of EDM process. The objective of EDM is to get high MRR as well as achieving reasonably good surface quality of machined component. The machining parameters that achieve the highest MRR strongly depend on the size of the machining surface i.e. Electrode used and work-piece surface. With upcoming worldwide important applications of Non-Conductive ceramics machining has become an important issue which needs to be investigated in much detail. The Alumina (Al2O3), Glass and other advanced engineering ceramics are rapidly emerging class of engineering materials possessing a wide range of remarkable properties i.e. high hardness, chemical stability, very low friction, unique electrical properties and these engineering ceramics posses high wear resistance which make them highly suitable for such engineering applications as jet engines and other aeronautical components, tools and dies and electronic sensors.
Download or read book Electrical Discharge Machining written by Elman C. Jameson and published by Society of Manufacturing Engineers. This book was released on 2001 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt: "In writing this book, the author focused on EDM fundamentals. These are the items common to all EDM machines, such as the spark, how the spark is controlled, what causes overcut, and the importance of the dielectric fluid. With regard to the workplace, covered are the affect the spark has on the metallurgy and how the surface finish is produced and controlled. The book also describes the development of Electrical Discharge Machining (EDM), the EDM system and process, the EDM sparking systems, the power supply (generator), spark voltage, electrode servo systems, di-electric systems, ionization and electrode wear, chips, the EDM surface, DC arcing, different kinds of EDM, autormatic servo systems operation, and electromagnetic radiation. It is the author's intent that this text will serve as the primer on the EDM process, allowing the people using EDM to become more efficient and the machines more productive."--Back cover.
Download or read book Micro electrical Discharge Machining Processes written by Golam Kibria and published by Springer. This book was released on 2018-12-15 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers a comprehensive collection of micro electrical discharge machining (EDM) processes, including hybrid processes. It discusses the theory behind each process and their applications in various technological as well as biomedical domains, and also presents a brief background to various micro EDM processes, current research challenges, and detailed case studies of micro-manufacturing miniaturized parts. The book serves as a valuable guide for students and researchers interested in micro EDM and other related processes.
Download or read book Electric Discharge Hybrid Machining Processes written by Basil Kuriachen and published by CRC Press. This book was released on 2022-03-30 with total page 373 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides the knowledge and insight into the fundamental aspects of Electric Discharge Machining (EDM) processes and various hybrid machining technologies derived to improve the machining efficiencies. Fundamental theory of material removal, recent research trends and future research directions have been covered in each chapter. After explaining EDM, Dry and Near-dry EDM processes, Electrochemical Spark Machining, Arc Machining processes, Electric Discharge Hybrid-Turning processes, Electrical Discharge Grinding, Electric Discharge Milling, and various assisted EDM processes have been discussed. Finally, modeling and simulation of hybrid machining processes are also included. The book reflects the recent developments and trends in electric discharge hybrid machining processes. It covers in detail the basics of EDM, various hybrid and assistive technologies in EDM. It includes the updated discussion on the significance of process parameters in various hybrid EDM processes. An overview of modelling and simulation of hybrid EDM process is provided. This book is aimed at Graduate students, researchers in manufacturing engineering, production engineering, and materials engineering.
Download or read book Micro Electro fabrication written by Tanveer Saleh and published by Elsevier. This book was released on 2021-05-14 with total page 413 pages. Available in PDF, EPUB and Kindle. Book excerpt: Micro Electro-fabrication outlines three major nanoscale electro-fabrication techniques, including electro-discharge machining, electrochemical machining and electrochemical deposition. Applications covered include the fabrication of nozzles for automobiles, miniature hole machining for aerospace turbine blade cooling, biomedical device fabrication, such as stents, the fabrication of microchannels for microfluidic application, the production of various MEMS devices, rapid prototyping of micro components, and nanoelectrode fabrication for scanning electron microscopy. This comprehensive book discusses the fundamental nature of the various electro-fabrication processes as well as mathematical modelling and applications. It is an important reference for materials scientists and engineers working at the nanoscale. Provides state-of-the-art research investigations on various topics of micro/nano EDM, micro LECD, micro/nano ECM and ECDM techniques Compares a variety of electro-fabrication techniques, outlining which is best in different situations Outlines a variety of modeling and optimization techniques relating to micro/nano EDM, micro LECD, micro/nano ECM and ECDM
Download or read book Electrical Discharge Machining EDM written by M. P. Jahan and published by Nova Science Publishers. This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electrical Discharge Machining (EDM) is one of the earliest and most widely used non-conventional machining processes. In recent years, the use of EDM has increased significantly in industries, mainly due to the extensive use of hard and difficult-to-cut materials, i.e. hardened steels, carbides, titanium alloys, nickel super alloys and so on. The EDM process is being used extensively for many important applications in die and mold, aerospace, automotive, micro-electronic and biomedical industries. As a result, extensive research has been carried out on various aspects of EDM. Taking those facts into consideration, this book aims to provide a comprehensive overview of the various types, technologies and applications of EDM. The book starts with chapters on the two major types of EDM: die-sinking EDM and wire-EDM. Subsequently, several EDM-based hybrid machining processes, such as: ultrasonically aided EDM, powder-mixed EDM, and simultanous micro-EDM/ECM have been discussed in detail. This book includes chapters on the detail of EDM surface and modeling and simulation of the EDM process. This book also contains chapters on the novel and innovative applications of EDM as well as machining of newer materials, such as: shape memory alloy, reaction-bonded silicon carbide, metal metrix composites, silicon based semiconductors, and non-conducting polymers. It is a useful resource for students and researchers who are planning to start their research on the area of EDM and related processes. It can also serve as a reference for students, academics, researchers, engineers, and working professionals in non-traditional manufacturing processes related industries.
Download or read book Micro Electro Discharge Machining written by Ajay M. Sidpara and published by CRC Press. This book was released on 2019-08-20 with total page 305 pages. Available in PDF, EPUB and Kindle. Book excerpt: Micro Electro Discharge Machining (EDM) is a prominent technology for the fabrication of micro components in many fields. Nowadays, it is used like a conventional machine tool due to favorable characteristics. This book provides the fundamental knowledge of the principles of the process and its variants, the different process parameters, the role of machine components and systems, the challenges, and how to eliminate processing errors. It also includes real life applications of micro EDM in different areas with the most relevant examples.
Download or read book Conventional and Powder Mixed Electro Discharge Machining written by Ahmad Majdi Abdul-Rani and published by CRC Press. This book was released on 2024-09-02 with total page 207 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the evolution of the electro-discharge machining (EDM) process from conventional EDM to powder mixed EDM with emphases on biomedical applications. It discusses the theory behind each process and their applications in the field of biomedical research, and presents a brief background to various EDM processes, current research challenges, and detailed case studies of powder mixed EDM of various materials. It also includes a state-of-the-art review of the EDM process. Features: Focuses on biomedical implant and device manufacturing using commercialization of powder mixed electro-discharge machining (PM-EDM) technology Discusses surface modification of biomaterials through the PM-EDM process Reviews processing of the metallic biomaterials for biomedical applications Explores optimization of the process factors for achieving optimal responses using NSGA-II Includes comprehensive mechanism and application details of the PM-EDM process This book is aimed at graduate students and researchers in manufacturing, production, materials, and biomedical engineering.
Download or read book Machining of Metal Matrix Composites written by J. Paulo Davim and published by Springer Science & Business Media. This book was released on 2011-09-18 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: Machining of Metal Matrix Composites provides the fundamentals and recent advances in the study of machining of metal matrix composites (MMCs). Each chapter is written by an international expert in this important field of research. Machining of Metal Matrix Composites gives the reader information on machining of MMCs with a special emphasis on aluminium matrix composites. Chapter 1 provides the mechanics and modelling of chip formation for traditional machining processes. Chapter 2 is dedicated to surface integrity when machining MMCs. Chapter 3 describes the machinability aspects of MMCs. Chapter 4 contains information on traditional machining processes and Chapter 5 is dedicated to the grinding of MMCs. Chapter 6 describes the dry cutting of MMCs with SiC particulate reinforcement. Finally, Chapter 7 is dedicated to computational methods and optimization in the machining of MMCs. Machining of Metal Matrix Composites can serve as a useful reference for academics, manufacturing and materials researchers, manufacturing and mechanical engineers, and professionals involved with MMC applications. It can also be used to teach modern manufacturing engineering or as a textbook for advanced undergraduate and postgraduate engineering courses in machining, manufacturing or materials.
Download or read book Micro Electro Discharge Machining written by Irene Fassi and published by . This book was released on 2021-10-25 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: Micro electrical discharge machining (micro-EDM) is a thermo-electric and contactless process most suited for micro-manufacturing and high-precision machining, especially when difficult-to-cut materials, such as super alloys, composites, and electro conductive ceramics, are processed. Many industrial domains exploit this technology to fabricate highly demanding components, such as high-aspect-ratio micro holes for fuel injectors, high-precision molds, and biomedical parts. Moreover, the continuous trend towards miniaturization and high precision functional components boosted the development of control strategies and optimization methodologies specifically suited to address the challenges in micro- and nano-scale fabrication. This Special Issue showcases 12 research papers and a review article focusing on novel methodological developments on several aspects of micro electrical discharge machining: machinability studies of hard materials (TiNi shape memory alloys, Si3N4-TiN ceramic composite, ZrB2-based ceramics reinforced with SiC fibers and whiskers, tungsten-cemented carbide, Ti-6Al-4V alloy, duplex stainless steel, and cubic boron nitride), process optimization adopting different dielectrics or electrodes, characterization of mechanical performance of processed surface, process analysis, and optimization via discharge pulse-type discrimination, hybrid processes, fabrication of molds for inflatable so���� microactuators, and implementation of low-cost desktop micro- EDM system.
