Download or read book Multi physics Modeling of Plasma Discharge and Material Removal in Micro Electro discharge Machining Process written by Soham Sanjeev Mujumdar and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 278 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 Electro Micromachining and Microfabrication written by Sandip Kunar and published by CRC Press. This book was released on 2024-04-09 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bridging the gap between the need for micro elements and the profitable microfabrication of goods, this new book provides an informative overview of the electro-micromachining and microfabrication processes, varieties, and important applications. Opening with an overview of a variety of micromachining technologies, with an emphasis on nontraditional approaches and recent advances in each, the volume discusses the ultrasonic micromachining processes for producing a variety of micro-shapes, such as micro-holes, micro-slots, and micro-walls, as well as assisted hybrid micromachining with ultrasonic vibration of the tool or workpiece, all which help to improve precision and to advance research. Computer-aided design and computer-aided manufacturing dental micromachining technologies are discussed. Micro-electrical discharge machining, laser micro grooving, and laser micromachining are among the advanced micro-manufacturing processes addressed as well. The volume also covers the use of an electrochemical micromachining method to improve micro texturing and the use of nano-additives to enhance MQL and micromachining process optimization.

Download or read book Modeling and Simulation of Micro Electrical Discharge Machining Process written by Bai Shao and published by . This book was released on 2015 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: Micro-EDM is the cumulative result of numerous single discharges; therefore, it is crucial to understand the single discharge material removal process in micro-EDM. However, due to the stochastic nature and complex process mechanism, micro-EDM, including its material removal mechanism, has not been fully understood. Process modeling is an effective way to learn and predict the process.

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 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.

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 Multi physics Modeling of Electromagnetically Driven Surface Plasma Discharges written by Yunho Kim and published by . This book was released on 2019 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation presents the computational modeling of non-equilibrium plasma discharges on an electromagnetically driven surface and its application to plasma assisted combustion. We address challenges often encountered in high pressure plasma discharges such as the non-uniform formation of plasmas due to filamentations and show how they could be handled by using a particular type of metamaterial. A metamaterial in the present context is an artificial composite assembled with periodic elements smaller than an incident wavelength. Metamaterials have drawn significant interest in engineering communities during the past few decades due to their extraordinary electromagnetic (EM) characteristics, e.g., a negative refractive index, that cannot be naturally excited using conventional methods or materials. An interesting electrodynamic phenomenon associated with metamaterials is the possible surface wave excitation on the artificially engineered surfaces. In particular, by carefully designing the assembly of periodic elements consisting of conductors and dielectrics, a strongly localized surface wave mode known as a spoof surface plasmon polariton (SSPP) can be efficiently excited. The extraordinary electromagnetic property of SSPP is its ability to imitate the behaviors of a surface plasmon polariton (SPP) in a wide range of frequencies (GHz -THz) while SPP can exist only in the optical regime (100's THz). In this study, our goal is to provide the in-depth analysis of the electrodynamics of SSPP, transients of surface plasma generation due to SSPP resonances, and to demonstrate the feasibility of using it for plasma assisted combustion. We have used multiple computational models that have been developed by our group and added necessary features to simulate the phenomena more accurately. In the first part of this work, we describe the numerical schemes employed for simulations. The computational tool consists of solvers for three different sets of equations: Maxwell's equations for high frequency (HF) electromagnetics, plasma governing equations for discharge physics, and reactive Navier Stokes equations for combustion. Coupling of these equations must be done carefully due to the multi-scale nature of the high frequency plasma discharges and combustion. The length and time scales range from micrometers to centimeters and nanoseconds to milliseconds, respectively. We provide the details of the coupling of the equations as well as the discretization methods for each set of equations. In this work, one of chief contributions to improving the models is the implementation of an enhanced version of absorbing boundary condition (CFS-PML) for second order Maxwell's equations. CFS-PML is especially suited for electromagnetic wave simulations that involve conductors which we demonstrate by solving a model problem for the verification of the code. In the second part, we present the computational study of argon surface plasma discharges generated by SSPP. The EM surface wave excitation is first analyzed in depth because the electromagnetic power absorption by electrons determines the transients of plasma breakdown. Electrodynamics of the SSPP excitation is investigated using broadband and monochromatic wave simulations. Instead of the infinite array of periodic elements, we have studied the metamaterial with a finite length for practical engineering applications. It is found that over a wide range of length scales from millimeters to centimeters, the EM waves always have a single node structure at resonance frequencies. The surface wave excited on the metasurface is characteristic of coupling between the cavity mode and surface wave mode. We refer to the resonance pertinent to such coupling as hybrid resonance. The shift of the hybrid resonance frequency is investigated in terms of varying dielectric permittivities, distances between perforations, and the whole lengths of the metasurfaces. Using an optimal configuration of the metasurface, the transients of the surface plasma generation due to the field intensification is studied. Interactions among the surface plasma, SSPP and the incident wave are presented. Multiple simulations show that even if the metasurfaces have different lengths, the transients of surface plasma formation are qualitatively identical at the hybrid resonance frequencies. Such scalability is one of the primary features of metamaterials that can be extended to the plasma discharge. In the third part, plasma assisted combustion induced by microwave sources is studied. Previous research in combustion engineering communities have addressed the importance of volumetric formation of flame kernel for successful combustion. Another key point in plasma assisted combustion is the volumetric generation of radical species in nanosecond timescale, which can significantly reduce the ignition delay for lean fuel-air mixtures. Motivated by the need for mechanisms that can generate combustion enhancing radicals over a large area, we have investigated the feasibility of using the SSPP generated surface plasmas for plasma assisted combustion. A kinetic mechanism of H2 - air mixture that was previously established by our group is used for this study. A mixture with the equivalence ratio of 0.3 at the initial pressure and temperature of 1 atm and 1000 K is assumed, respectively. Fully coupled simulations show that the cm-scale plasma kernel can be efficiently transitioned into successful ignition and flame propagation with shortened ignition delay. In the last part, we discuss strategies to parallelize the simulation tools for high performance computing. The governing equations solved in this study are spatially discretized using either finite edge element method or cell-centered finite volume method. They require different approaches to achieve parallel scalability, and in particular, the Maxwell's equations needs a special preconditioning technique to reduce computational time. The technique is known as nodal auxiliary space preconditioning whose theoretical background and performance on a supercomputer are presented. Additionally, the module which solves reactive Navier-Stokes equations is also parallelized to study large scale (centimeters) ignition phenomena. For both plasma-wave coupled solver and combustion solver, we discuss the details of MPI(Message Passing Interface)-based parallelization processes

Download or read book Product Process Fingerprint in Micro Manufacturing written by Guido Tosello and published by MDPI. This book was released on 2019-05-31 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: The continuous miniaturization of products and the growing complexity of their embedded multifunctionalities necessitates continuous research and development efforts regarding micro components and related micro manufacturing technologies. Highly miniaturized systems, manufactured using a wide variety of materials, have found application in key technological fields, such as healthcare devices, micro implants, mobility, communications, optics, and micro electromechanical systems. Innovations required for the high-precision manufacturing of micro components can specifically be achieved through optimizations using post-process (i.e., offline) and in-process (i.e., online) metrology of both process input and output parameters, as well as geometrical features of the produced micro parts. However, it is of critical importance to reduce the metrology and optimization efforts, since process and product quality control can represent a significant portion of the total production time in micro manufacturing. To solve this fundamental challenge, research efforts have been undertaken in order to define, investigate, implement, and validate the so-called “product/process manufacturing fingerprint” concept. The “product manufacturing fingerprint” concept refers to those unique dimensional outcomes (e.g., surface topography, form error, critical dimensions, etc.) on the produced component that, if kept under control and within specifications, ensure that the entire micro component complies to its specifications. The “process manufacturing fingerprint” is a specific process parameter or feature to be monitored and controlled, in order to maintain the manufacture of products within the specified tolerances. By integrating both product and process manufacturing fingerprint concepts, the metrology and optimization efforts are highly reduced. Therefore, the quality of the micro products increases, with an obvious improvement in production yield. Accordingly, this Special Issue seeks to showcase research papers, short communications, and review articles that focus on novel methodological developments and applications in micro- and sub-micro-scale manufacturing, process monitoring and control, as well as micro and sub-micro product quality assurance. Focus will be on micro manufacturing process chains and their micro product/process fingerprint, towards full process optimization and zero-defect micro manufacturing.

Download or read book Recommended Values of Thermophysical Properties for Selected Commercial Alloys written by K. C. Mills and published by Woodhead Publishing. This book was released on 2002 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Principles of Plasma Discharges and Materials Processing written by Michael A. Lieberman and published by John Wiley & Sons. This book was released on 2024-10-15 with total page 837 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new edition of this industry classic on the principles of plasma processing Plasma-based technology and materials processes have been central to the revolution of the last half-century in micro- and nano-electronics. From anisotropic plasma etching on microprocessors, memory, and analog chips, to plasma deposition for creating solar panels and flat-panel displays, plasma-based materials processes have reached huge areas of technology. As key technologies scale down in size from the nano- to the atomic level, further developments in plasma materials processing will only become more essential. Principles of Plasma Discharges and Materials Processing is the foundational introduction to the subject. It offers detailed information and procedures for designing plasma-based equipment and analyzing plasma-based processes, with an emphasis on the abiding fundamentals. Now fully updated to reflect the latest research and data, it promises to continue as an indispensable resource for graduate students and industry professionals in a myriad of technological fields. Readers of the third edition of Principles of Plasma Discharges and Materials Processing will also find: Extensive figures and tables to facilitate understanding A new chapter covering the recent development of processes involving high-pressure capacitive discharges New subsections on discharge and processing chemistry, physics, and diagnostics Principles of Plasma Discharges and Materials Processing is ideal for professionals and process engineers in the field of plasma-assisted materials processing with experience in the field of science or engineering. It is the premiere world-wide basic text for graduate courses in the field.

Download or read book Handbook of Manufacturing Engineering and Technology written by Andrew Y. C. Nee and published by Springer. This book was released on 2014-10-31 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Springer Reference Work Handbook of Manufacturing Engineering and Technology provides overviews and in-depth and authoritative analyses on the basic and cutting-edge manufacturing technologies and sciences across a broad spectrum of areas. These topics are commonly encountered in industries as well as in academia. Manufacturing engineering curricula across universities are now essential topics covered in major universities worldwide.

Download or read book Innovative Development in Micromanufacturing Processes written by Pawan Kumar Rakesh and published by CRC Press. This book was released on 2023-11-23 with total page 463 pages. Available in PDF, EPUB and Kindle. Book excerpt: Innovative Development in Micromanufacturing Processes details cutting edge technologies in micromanufacturing processes, an industry which has undergone a technological transformation in the past decade. Enabling engineers to create high performance, low cost, and long-lasting products, this book is an essential companion to all those working in micro and nano engineering. As products continue to get smaller and smaller, the field of micromanufacturing has gained an international audience. This book looks at both approaches of micromanufacturing: top-down and bottom-up. The top-down approach includes subtractive micromanufacturing processes such as microturning, micromilling, microdrilling, laser beam micromachining, and magnetic abrasive finishing. The bottom-up approach involves additive manufacturing processes such as micro-forming, micro deep drawing, microforging, microextrusion, and microwelding. Additionally, microjoining and microhybrid manufacturing processes are discussed in detail. The book also aids engineers and students in solving common manufacturing issues such as choice of materials and testing. The book will be of interest to those working in micro and nano engineering and machining, as well as students in manufacturing engineering, materials science, and more.

Download or read book Physical Modeling of Wire cut Electrical Discharge Machining written by Chien-Nan Yang and published by . This book was released on 1995 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Unit Manufacturing Processes written by National Research Council and published by National Academies Press. This book was released on 1995-01-03 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: Manufacturing, reduced to its simplest form, involves the sequencing of product forms through a number of different processes. Each individual step, known as an unit manufacturing process, can be viewed as the fundamental building block of a nation's manufacturing capability. A committee of the National Research Council has prepared a report to help define national priorities for research in unit processes. It contains an organizing framework for unit process families, criteria for determining the criticality of a process or manufacturing technology, examples of research opportunities, and a prioritized list of enabling technologies that can lead to the manufacture of products of superior quality at competitive costs. The study was performed under the sponsorship of the National Science Foundation and the Defense Department's Manufacturing Technology Program.

Download or read book Comprehensive Materials Finishing written by M.S.J. Hashmi and published by Elsevier. This book was released on 2016-08-29 with total page 1467 pages. Available in PDF, EPUB and Kindle. Book excerpt: Finish Manufacturing Processes are those final stage processing techniques which are deployed to bring a product to readiness for marketing and putting in service. Over recent decades a number of finish manufacturing processes have been newly developed by researchers and technologists. Many of these developments have been reported and illustrated in existing literature in a piecemeal manner or in relation only to specific applications. For the first time, Comprehensive Materials Finishing, Three Volume Set integrates a wide body of this knowledge and understanding into a single, comprehensive work. Containing a mixture of review articles, case studies and research findings resulting from R & D activities in industrial and academic domains, this reference work focuses on how some finish manufacturing processes are advantageous for a broad range of technologies. These include applicability, energy and technological costs as well as practicability of implementation. The work covers a wide range of materials such as ferrous, non-ferrous and polymeric materials. There are three main distinct types of finishing processes: Surface Treatment by which the properties of the material are modified without generally changing the physical dimensions of the surface; Finish Machining Processes by which a small layer of material is removed from the surface by various machining processes to render improved surface characteristics; and Surface Coating Processes by which the surface properties are improved by adding fine layer(s) of materials with superior surface characteristics. Each of these primary finishing processes is presented in its own volume for ease of use, making Comprehensive Materials Finishing an essential reference source for researchers and professionals at all career stages in academia and industry. Provides an interdisciplinary focus, allowing readers to become familiar with the broad range of uses for materials finishing Brings together all known research in materials finishing in a single reference for the first time Includes case studies that illustrate theory and show how it is applied in practice