Mechanistic Identification Of Specific Force Coefficients In Endmilling Inconel 718 Under Four Cooling Strategies
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Mechanistic Identification Of Specific Force Coefficients In Endmilling Inconel 718 Under Four Cooling Strategies
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Author : Mahmood Shaman Ameen
language : en
Publisher:
Release Date : 2014
Mechanistic Identification Of Specific Force Coefficients In Endmilling Inconel 718 Under Four Cooling Strategies written by Mahmood Shaman Ameen and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.
"This thesis presents the results of experimental investigations of the mechanistic identification of specific force coefficients for uncoated bull-nose and uncoated wavy-edge/bull-nose helical endmilling of Inconel 718 under emulsion, minimum quantity lubrication (MQL), cryogenic (LN2), and combined (MQL + LN2) cooling. Several slot milling tests were conducted on Inconel 718 workpiece block with depth of cut 1.25 mm. The cutting parameters were varied as: spindle speed, n = 250 and 750 rev/min, feedrate, f = 25-75 mm/min by using uncoated carbide bull-nose helical endmill. Also 24 peripheral milling tests were conducted on Inconel 718 workpiece block with axial depth of cut 18.75 mm and radial depth of cut 1.75 mm. The cutting parameters were varied as: spindle speed, n = 62 and 93 rev/min, feedrate, f = 27.9-55.8 mm/min by using uncoated cobalt wavy-edge/bull-nose helical endmill. Cutting force components and specific force coefficients have been experimentally determined to compare the effects of different cooling methods. Eventually, six specific cutting and edge force coefficients (Ktc, Krc, Kac, Kte, Kre, Kae) have been determined for uncoated bull- nose and uncoated wavy-edge/bull-nose helical endmilling of Inconel 718 workpiece under the four cooling methods (Emulsion, MQL, LN2, and combined (MQL+LN2)), thus a new database that hitherto does not exist in published literature has been created to be used for accurate prediction of cutting forces under typical industrial machining conditions"--Abstract, page iv.
Mechanistic Modeling Of Cutting Forces In Wavy Edge Bull Nose Helical End Milling Of Inconel 718 Under Different Cooling Lubrication Strategies
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Author : Abdulhakim Ali Sultan
language : en
Publisher:
Release Date : 2015
Mechanistic Modeling Of Cutting Forces In Wavy Edge Bull Nose Helical End Milling Of Inconel 718 Under Different Cooling Lubrication Strategies written by Abdulhakim Ali Sultan and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
"This research presents the results of the development of a mechanistic cutting force prediction model for the wavy-edge bull-nose helical endmill (WEBNHE). The mechanistic model was developed to predict cutting force components and the resultant cutting force in high-speed end-milling of Inconel 718 under two cooling strategies: emulsion and Minimum Quantity Lubrication (MQL). The effects of the cooling strategies are incorporated into the mechanistic model through six cutting force coefficients (K[sub tc] ,K[sub rc] ,K[sub ac]), and edge force coefficients (K[sub te], K[sub re], K[sub ae]), which have been experimentally identified in a separate research. The mechanistic model was validated by conducting end-milling experiments on Inconel 718 using a WEBNHE of 1.25'' diameter under emulsion and MQL cooling strategies. In addition to cutting forces prediction, the mechanistic cutting force prediction model is used to investigate the effects of the cooling strategy, and the effects of the geometric parameters of the WEBNHE on the predicted cutting force components and the resultant cutting force. The geometric parameters investigated in this research were: wave magnitude, wave length, axial shift, and the helix angle. The cutting force components and the resultant cutting force predicted by this mechanistic cutting force model under the two cooling strategies were in good agreement with the experimental results. Additionally, the results show that an increase in the depth of cut under MQL generates less cutting force than the same increase under emulsion. Moreover, all predicted cutting force components increase when the magnitude of the WEBNHE increases, whereas they decrease when the wave length, axial shift, and the helix angle increase"--Abstract, page iv.
High Speed Machining
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Author : Kapil Gupta
language : en
Publisher: Academic Press
Release Date : 2020-01-31
High Speed Machining written by Kapil Gupta and has been published by Academic Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-01-31 with Technology & Engineering categories.
High-Speed Machining covers every aspect of this important subject, from the basic mechanisms of the technology, right through to possible avenues for future research. This book will help readers choose the best method for their particular task, how to set up their equipment to reduce chatter and wear, and how to use simulation tools to model high-speed machining processes. The different applications of each technology are discussed throughout, as are the latest findings by leading researchers in this field. For any researcher looking to understand this topic, any manufacturer looking to improve performance, or any manager looking to upgrade their plant, this is the most comprehensive and authoritative guide available. Summarizes important R&D from around the world, focusing on emerging topics like intelligent machining Explains the latest best practice for the optimization of high-speed machining processes for greater energy efficiency and machining precision Provides practical advice on the testing and monitoring of HSM machines, drawing on practices from leading companies
Machinability Improvement During High Speed End Milling Of Inconel 718 Alloy
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Author : Chukwujekwu Ikwy Nnadi
language : en
Publisher:
Release Date : 2014
Machinability Improvement During High Speed End Milling Of Inconel 718 Alloy written by Chukwujekwu Ikwy Nnadi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.
"This thesis presents the results of the experimental investigation of the effects of machining parameters (spindle speed and feedrate) and cooling strategies [Minimum Quantity Lubrication (MQL), Cryogenic Liquid Nitrogen (LN2), and combined (MQL+LN2)] on cutting force components, cutting temperature, tool wear and surface roughness during high-speed slot end-milling of Inconel 718 alloy. In addition, a comparative evaluation of the three cooling strategies was conducted for cutting force components, surface roughness and residual stresses. All end-milling experiments were conducted on a Cincinnati Milacron Vertical Machining center (VMC), using a 0.5 inch (12.7 mm) diameter, 0.03 inch (0.762 mm) corner radius four-flute uncoated carbide end-mill. A one-third fractional factorial design of experiments was constructed (nine experimental runs) and used in analyzing all experimental results. Cutting force components were acquired using a Kistler type 9272 4-component dynamometer, which was connected to an amplifier and a junction box. Cutting temperature was measured using a 0.125 inch (3.175 mm) diameter ungrounded k-type thermocouple, while tool wear was investigated indirectly by analyzing the maximum cutting force components of the last two passes (19 and 20). Surface roughness and residual stresses were measured using a profilometer and X-ray diffraction respectively. The results showed that high spindle speed (750 rpm) and medium feed rate (2 ipm) gave the lowest cutting force components, while low spindle speed (250 rpm) gave the lowest cutting temperature and tool wear. Furthermore, a low spindle speed (250 rpm) and feed rate (1 ipm) gave the least surface roughness, while MQL cooling strategy induced the highest compressive stresses"--Abstract, page iv.
Machining Of Titanium Alloys
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Author : J. Paulo Davim
language : en
Publisher: Springer
Release Date : 2014-07-05
Machining Of Titanium Alloys written by J. Paulo Davim and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-07-05 with Technology & Engineering categories.
This book presents a collection of examples illustrating the resent research advances in the machining of titanium alloys. These materials have excellent strength and fracture toughness as well as low density and good corrosion resistance; however, machinability is still poor due to their low thermal conductivity and high chemical reactivity with cutting tool materials. This book presents solutions to enhance machinability in titanium-based alloys and serves as a useful reference to professionals and researchers in aerospace, automotive and biomedical fields.
Metal Cutting Theory And Practice
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Author : David A. Stephenson
language : en
Publisher: CRC Press
Release Date : 2018-09-03
Metal Cutting Theory And Practice written by David A. Stephenson and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-09-03 with Technology & Engineering categories.
A Complete Reference Covering the Latest Technology in Metal Cutting Tools, Processes, and Equipment Metal Cutting Theory and Practice, Third Edition shapes the future of material removal in new and lasting ways. Centered on metallic work materials and traditional chip-forming cutting methods, the book provides a physical understanding of conventional and high-speed machining processes applied to metallic work pieces, and serves as a basis for effective process design and troubleshooting. This latest edition of a well-known reference highlights recent developments, covers the latest research results, and reflects current areas of emphasis in industrial practice. Based on the authors’ extensive automotive production experience, it covers several structural changes, and includes an extensive review of computer aided engineering (CAE) methods for process analysis and design. Providing updated material throughout, it offers insight and understanding to engineers looking to design, operate, troubleshoot, and improve high quality, cost effective metal cutting operations. The book contains extensive up-to-date references to both scientific and trade literature, and provides a description of error mapping and compensation strategies for CNC machines based on recently issued international standards, and includes chapters on cutting fluids and gear machining. The authors also offer updated information on tooling grades and practices for machining compacted graphite iron, nickel alloys, and other hard-to-machine materials, as well as a full description of minimum quantity lubrication systems, tooling, and processing practices. In addition, updated topics include machine tool types and structures, cutting tool materials and coatings, cutting mechanics and temperatures, process simulation and analysis, and tool wear from both chemical and mechanical viewpoints. Comprised of 17 chapters, this detailed study: Describes the common machining operations used to produce specific shapes or surface characteristics Contains conventional and advanced cutting tool technologies Explains the properties and characteristics of tools which influence tool design or selection Clarifies the physical mechanisms which lead to tool failure and identifies general strategies for reducing failure rates and increasing tool life Includes common machinability criteria, tests, and indices Breaks down the economics of machining operations Offers an overview of the engineering aspects of MQL machining Summarizes gear machining and finishing methods for common gear types, and more Metal Cutting Theory and Practice, Third Edition emphasizes the physical understanding and analysis for robust process design, troubleshooting, and improvement, and aids manufacturing engineering professionals, and engineering students in manufacturing engineering and machining processes programs.
Metal Cutting Principles
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Author : Milton C. Shaw
language : en
Publisher: MIT Press
Release Date : 1960
Metal Cutting Principles written by Milton C. Shaw and has been published by MIT Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1960 with Metal-cutting categories.
Toward developing a rational basis for the metal cutting process.
Sustainable Machining
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Author : J. Paulo Davim
language : en
Publisher: Springer
Release Date : 2017-03-19
Sustainable Machining written by J. Paulo Davim and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-03-19 with Technology & Engineering categories.
This book provides an overview on current sustainable machining. Its chapters cover the concept in economic, social and environmental dimensions. It provides the reader with proper ways to handle several pollutants produced during the machining process. The book is useful on both undergraduate and postgraduate levels and it is of interest to all those working with manufacturing and machining technology.
Metal Machining
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Author : P.R.N. Childs
language : en
Publisher: Butterworth-Heinemann
Release Date : 2013-10-22
Metal Machining written by P.R.N. Childs and has been published by Butterworth-Heinemann this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-10-22 with Technology & Engineering categories.
Metal machining is the most widespread metal-shaping process in the mechanical manufacturing industry. World-wide investment in metal machining tools increases year on year - and the wealth of nations can be judged by it. This text - the most up-to-date in the field - provides in-depth discussion of the theory and application of metal machining at an advanced level. It begins with an overview of the development of metal machining and its role in the current industrial environment and continues with a discussion of the theory and practice of machining. The underlying mechanics are analysed in detail and there are extensive chapters examining applications through a discussion of simulation and process control. "Metal Machining: Theory and Applications" is essential reading for senior undergraduates and postgraduates specialising in cutting technology. It is also an invaluable reference tool for professional engineers. Professors Childs, Maekawa, Obikawa and Yamane are four of the leading authorities on metal machining and have worked together for many years. Of interest to all mechanical, manufacturing and materials engineers Theoretical and practical problems addressed
Virtual Testing And Predictive Modeling
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Author : Bahram Farahmand
language : en
Publisher: Springer Science & Business Media
Release Date : 2009-06-29
Virtual Testing And Predictive Modeling written by Bahram Farahmand and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009-06-29 with Science categories.
Thematerialsusedinmanufacturingtheaerospace,aircraft,automobile,andnuclear parts have inherent aws that may grow under uctuating load environments during the operational phase of the structural hardware. The design philosophy, material selection, analysis approach, testing, quality control, inspection, and manufacturing are key elements that can contribute to failure prevention and assure a trouble-free structure. To have a robust structure, it must be designed to withstand the envir- mental load throughout its service life, even when the structure has pre-existing aws or when a part of the structure has already failed. If the design philosophy of the structure is based on the fail-safe requirements, or multiple load path design, partial failure of a structural component due to crack propagation is localized and safely contained or arrested. For that reason, proper inspection technique must be scheduled for reusable parts to detect the amount and rate of crack growth, and the possible need for repairing or replacement of the part. An example of a fail-sa- designed structure with crack-arrest feature, common to all aircraft structural parts, is the skin-stiffened design con guration. However, in other cases, the design p- losophy has safe-life or single load path feature, where analysts must demonstrate that parts have adequate life during their service operation and the possibility of catastrophic failure is remote. For example, all pressurized vessels that have single load path feature are classi ed as high-risk parts. During their service operation, these tanks may develop cracks, which will grow gradually in a stable manner.