[PDF] Temperatures In High Efficiency Deep Grinding eBook

Author :
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Page : pages
File Size : 28,13 MB
Release : 2010
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ISBN :

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This research considers the temperatures generated in the workpiece during profile and cylindrical traverse grinding in the High Efficiency Deep Grinding (HEDG) regime. The HEDG regime takes large depths of cut at high wheel and workpiece speeds to create a highly efficient material removal process. This aggressive processing generates high temperatures in the contact zone between the wheel and workpiece. However, the beneficial contact angle and the rapid removal of the heated wheel - workpiece contact zone results in low temperatures in the finished surface. Temperatures in the ground surface can be predicted with knowledge of the specific grinding energy and the grinding parameters used. Specific grinding energies recorded at high specific material removal rates demonstrated a constant value of specific grinding energy dependent on cutting and contact conditions, improving accuracy of the predictive model. This was combined with a new approach to burn threshold modelling, which demonstrated an improved division of damaged and undamaged surfaces. Cutting and contact conditions in the grinding profile vary dependent on their position. This thesis shows how temperatures vary with location and estimates the partitioning of the heat flux to the regions of the grinding profile. This suggested a constant partitioning of energy to each of the three surfaces considered independently of specific material removal rates. Further a potential link was shown between the surface and the sidewall of the grinding profile, which allows temperatures in a secondary surface to be predicted given knowledge of that in the primary. Finally, the work has demonstrated the feasibility of the Superabrasive Turning process. Using small values of feed per turn and high workpiece feedrates promoted high values of removal rate with low depths of thermal penetration in the as ground surface. Thus the process has become viable for high speed cylindrical traverse grinding.

Author : Andrew John Bell
Publisher :
Page : pages
File Size : 24,19 MB
Release : 2009
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ISBN :

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This research considers the temperatures generated in the workpiece during profile and cylindrical traverse grinding in the High Efficiency Deep Grinding (HEDG) regime. The HEDG regime takes large depths of cut at high wheel and workpiece speeds to create a highly efficient material removal process. This aggressive processing generates high temperatures in the contact zone between the wheel and workpiece. However, the beneficial contact angle and the rapid removal of the heated wheel? workpiece contact zone results in low temperatures in the finished surface. Temperatures in the ground surface can be predicted with knowledge of the specific grinding energy and the grinding parameters used. Specific grinding energies recorded at high specific material removal rates demonstrated a constant value of specific grinding energy dependent on cutting and contact conditions, improving accuracy of the predictive model. This was combined with a new approach to burn threshold modelling, which demonstrated an improved division of damaged and undamaged surfaces. Cutting and contact conditions in the grinding profile vary dependent on their position. This thesis shows how temperatures vary with location and estimates the partitioning of the heat flux to the regions of the grinding profile. This suggested a constant partitioning of energy to each of the three surfaces considered independently of specific material removal rates. Further a potential link was shown between the surface and the sidewall of the grinding profile, which allows temperatures in a secondary surface to be predicted given knowledge of that in the primary. Finally, the work has demonstrated the feasibility of the Superabrasive Turning process. Using small values of feed per turn and high workpiece feedrates promoted high values of removal rate with low depths of thermal penetration in the as ground surface. Thus the process has become viable for high speed cylindrical traverse grinding.

Author : W. Brian Rowe
Publisher : William Andrew
Page : 476 pages
File Size : 32,59 MB
Release : 2013-11-11
Category : Technology & Engineering
ISBN : 0323297986

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Principles of Modern Grinding Technology, Second Edition, provides insights into modern grinding technology based on the author’s 40 years of research and experience in the field. It provides a concise treatment of the principles involved and shows how grinding precision and quality of results can be improved and costs reduced. Every aspect of the grinding process--techniques, machines and machine design, process control, and productivity optimization aspects--come under the searchlight. The new edition is an extensive revision and expansion of the first edition covering all the latest developments, including center-less grinding and ultra-precision grinding. Analyses of factors that influence grinding behavior are provided and applications are presented assisted by numerical examples for illustration. The new edition of this well-proven reference is an indispensible source for technicians, engineers, researchers, teachers, and students who are involved with grinding processes. Well-proven source revised and expanded by undisputed authority in the field of grinding processes Coverage of the latest developments, such as ultra-precision grinding machine developments and trends in high-speed grinding Numerically worked examples give scale to essential process parameters The book as a whole and in particular the treatment of center-less grinding is considered to be unchallenged by other books

Author : Konstantinos Salonitis
Publisher : Springer
Page : 102 pages
File Size : 45,76 MB
Release : 2015-05-25
Category : Technology & Engineering
ISBN : 3319193724

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This book presents the grind-hardening process and the main studies published since it was introduced in 1990s. The modelling of the various aspects of the process, such as the process forces, temperature profile developed, hardness profiles, residual stresses etc. are described in detail. The book is of interest to the research community working with mathematical modeling and optimization of manufacturing processes.

Author : Brian Rowe
Publisher : MDPI
Page : 148 pages
File Size : 27,15 MB
Release : 2019-06-13
Category : Technology & Engineering
ISBN : 3038429384

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This specialist edition features key innovations in the science and engineering of new grinding processes, abrasives, tools, machines, and systems for a range of important industrial applications. Topics written by invited, internationally recognized authors review the advances and present results of research over a range of well-known grinding processes. A significant introductory review chapter explores innovations to achieve high productivity and very high precision in grinding. The reviewed applications range from grinding systems for very large lenses and reflectors, through to medium size grinding machine processes, and down to grinding very small components used in MEMS . Early research chapters explore the influence of grinding wheel topography on surface integrity and wheel wear. A novel chapter on abrasive processes also addresses the finishing of parts produced by additive manufacturing through mass finishing. Materials to be ground range from conventional engineering steels to aerospace materials, ceramics, and composites. The research findings highlight important new results for avoiding material sub-surface damage. The papers compiled in this book include references to many source publications which will be found invaluable for further research, such as new features introduced into control systems to improve process efficiency. The papers also reflect significant improvements and research findings relating to many aspects of grinding processes, including machines, materials, abrasives, wheel preparation, coolants, lubricants, and fluid delivery. Finally, a definitive chapter summarizes the optimal settings for high precision and the achievement of centerless grinding stability.

Author : Feng Zhu
Publisher : Trans Tech Publications Ltd
Page : 563 pages
File Size : 22,21 MB
Release : 2011-07-27
Category : Technology & Engineering
ISBN : 3038135070

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Volume is indexed by Thomson Reuters CPCI-S (WoS). The papers were selected for this volume on the basis of their quality and relevance to the topic of abrasive technology. The volume presents the reader with recent advances in the field of abrasive technology; including the mechanics and control of abrasive processes, modeling, simulation and optimization of abrasive processes, green and clean production in abrasive processes, measurement and surface-quality assessment, cooling and coolants, polishing, wheel-truing and dressing, novel abrasive techniques and novel machining techniques. It will therefore be of great value to production and research engineers, research students and academics working in the field.

Author : Tim O'Hagan
Publisher : John Wiley & Sons
Page : 506 pages
File Size : 16,11 MB
Release : 2001-11-28
Category : Technology & Engineering
ISBN : 9781860583254

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An overview of the latest advances in manufacturing In manufacturing, staying up to date with the newest technology has a direct impact on the bottom line. To this end, Advances in Manufacturing Technology XV provides an invaluable resource: papers presented at the 15th National Conference on Manufacturing Research, highlighting the latest findings and ongoing work of the world's leading labs. Showcasing innovation in efficiency, speed, safety, capability, and much more, these works represent the forefront of manufacturing today.

Author : Changhe Li
Publisher : Springer Nature
Page : 412 pages
File Size : 20,26 MB
Release : 2023-12-01
Category : Technology & Engineering
ISBN : 981996265X

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This book discusses the thermodynamic mechanism of MQL grinding with nano-biological lubricant from the force, heat, surface integrity, and micro-morphology. It makes up the fatal defect of the lack of heat transfer capability of traditional MQL grinding. The machining accuracy, surface quality, especially surface integrity of the workpiece, are significantly improved; at the same time, the service life of the grinding wheel is increased and the working environment is improved. The general scope of the book’s content is the effects of MQL grinding with nano-bio-lubricant on grinding force, thermal mechanism, and surface. It provides a new method of sustainable green grinding for environment-friendly, resource-saving, and energy-efficient utilization and solves the technical bottleneck of the insufficient capacity in MQL heat transfer.

Author : Ioan D. Marinescu
Publisher : CRC Press
Page : 629 pages
File Size : 47,60 MB
Release : 2006-12-21
Category : Science
ISBN : 1420017640

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Grinding offers capabilities that range from high-rate material removal to high-precision superfinishing, and has become one of the most widely used industrial machining and surface finishing operations. Reflecting modern developments in the science and practice of modern grinding processes, the Handbook of Machining with Grinding Wheels presents a

Author : Liu, Mingzheng
Publisher : IGI Global
Page : 412 pages
File Size : 13,23 MB
Release : 2024-05-02
Category : Science
ISBN :

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The achievement of high-efficiency and precise grinding of difficult-to-cut metals—like titanium alloys—is essential in the aerospace industry. However, the process often results in thermal damage to the workpiece surface, posing a significant technical challenge. While minimum quantity lubrication (MQL) has been used to aid titanium alloy grinding, its effectiveness is limited by insufficient heat dissipation and lubrication. As an alternative to normal temperature air for carrying micro-lubricants, Cryogenic air has shown promise in improving oil film heat transfer and lubrication performance in the grinding zone, thus reducing workpiece surface thermal damage. The experimental state of the technology demands more comprehensive studies on its effectiveness and on the underlying mechanisms. Thermodynamic Mechanism of Cryogenic Air Minimum Quantity Lubrication Grinding addresses these challenges by providing a theoretical framework for understanding and optimizing cryogenic air minimum quantity lubrication in grinding processes, particularly for titanium alloys. It explores the physical characteristics of lubricants under cryogenic conditions, the influence of low temperatures on atomization effects, droplet formation dynamics, and heat transfer mechanisms within the grinding zone. By establishing quantitative relationships between cryogenic air parameters and lubricant properties, the book lays a foundation for enhancing the cooling lubrication mechanism of cryogenic air MQL in grinding processes. Researchers, scholars, and graduate students in universities and research institutes focusing on machining will find this book invaluable, as it goes beyond the theoretical insights into practical solutions to enhance grinding efficiency and reduce thermal damage.