Surface Integrity In Machining
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Surface Integrity In Machining
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Author : J. Paulo Davim
language : en
Publisher: Springer Science & Business Media
Release Date : 2010-01-10
Surface Integrity In Machining written by J. Paulo Davim 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 2010-01-10 with Technology & Engineering categories.
"Surface Integrity in Machining" describes the fundamentals and recent advances in the study of surface integrity in machining processes. "Surface Integrity in Machining" gathers together research from international experts in the field. Topics covered include: the definition of surface integrity and its importance in functional performance; surface topography characterization and evaluation; microstructure modification and the mechanical properties of subsurface layers; residual stresses; surface integrity characterization methods; and surface integrity aspects in machining processes. A useful reference for researchers in tribology and materials, mechanical and materials engineers, and machining professionals, "Surface Integrity in Machining" can be also used as a textbook by advanced undergraduate and postgraduate students.
Surface Integrity Of Machined Structural Components
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Author : William P. Koster
language : en
Publisher:
Release Date : 1970
Surface Integrity Of Machined Structural Components written by William P. Koster and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with Metals categories.
A program has been run to evaluate the effects of different metal removal methods and variations of these methods on surface integrity. Three alloys were studied: beta rolled Ti-6Al-4V; AISI 4340, quenched and tempered, 50 Rc; and Inconel 718, solution treated and aged. Various grinding procedures caused the titanium alloy to exhibit a fatigue strength range of 13 to 62 ksi. The fatigue strength of 4340 due to grinding variables ranged from 62 to 102 ksi, while Inconel 718 showed a range of 24 to 60 ksi. Abusive grinding conditions always resulted in fatigue strengths at the minimum of these ranges. Milling variables exhibited a fatigue strength range of 32 to 72 ksi in the beta rolled titanium alloy. EDM and ECM on Inconel 718 yielded 22 and 39 ksi, respectively, compared to 60 ksi for gentle grinding. Guidelines for processing aerospace hardware considering surface integrity requirements are presented in the report.
Manufacturing Surface Technology
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Author : Brian Griffiths
language : en
Publisher: CRC Press
Release Date : 2001
Manufacturing Surface Technology written by Brian Griffiths and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with Technology & Engineering categories.
Some Studies On Surface Integrity Of Machined Surfaces
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Author : Pankul Goyal
language : en
Publisher: LAP Lambert Academic Publishing
Release Date : 2012-07
Some Studies On Surface Integrity Of Machined Surfaces written by Pankul Goyal and has been published by LAP Lambert Academic Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-07 with categories.
Surface Integrity of machined surfaces is defined based on various constituents e.g. surface roughness, microstructure, surface hardening and microhardness, which all are influenced by machining parameters such as coolant, cutting speed, tool wear, feed, depth of cut and tool material and its geometry. An effort has been made in this book to study the effect of slab down milling process parameters on surface integrity of HSLA (ASTM A572 Grade 50). Experiments were performed as per Taguchi L18 orthogonal array for different combinations of machining parameters to collect data which were subsequently statistically analysed to optimize multi-performance characteristics. This book explains in detail the procedure for conducting experiments and using grey relational analysis for multi-performance characteristics optimization. It is meant for students and researchers of production and industrial engineering.
Advances In Hard To Cut Materials
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Author : Grzegorz M. Królczyk
language : en
Publisher: MDPI
Release Date : 2020-03-13
Advances In Hard To Cut Materials written by Grzegorz M. Królczyk and has been published by MDPI this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-03-13 with Technology & Engineering categories.
The rapid growth of modern industry has resulted in a growing demand for construction materials with excellent operational properties. However, the improved features of these materials can significantly hinder their manufacture and, therefore, they can be defined as hard-to-cut. The main difficulties during the manufacturing/processing of hard-to-cut materials are attributed especially to their high hardness and abrasion resistance, high strength at room or elevated temperatures, increased thermal conductivity, as well as resistance to oxidation and corrosion. Nowadays, the group of hard-to-cut materials is extensive and still expanding, which is attributed to the development of a novel manufacturing techniques (e.g., additive technologies). Currently, the group of hard-to-cut materials mainly includes hardened and stainless steels, titanium, cobalt and nickel alloys, composites, ceramics, as well as the hard clads fabricated by additive techniques. This Special Issue, “Advances in Hard-to-Cut Materials: Manufacturing, Properties, Process Mechanics and Evaluation of Surface Integrity”, provides the collection of research papers regarding the various problems correlated with hard-to-cut materials. The analysis of these studies reveals the primary directions regarding the developments in manufacturing methods, characterization, and optimization of hard-to-cut materials.
Surface Integrity Evaluation And The Effect Of Machining Induced Surface Integrity Characteristics On Part S Performance
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Author : Quanren Zeng
language : en
Publisher:
Release Date : 2015
Surface Integrity Evaluation And The Effect Of Machining Induced Surface Integrity Characteristics On Part S Performance written by Quanren Zeng 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.
Surface integrity (SI) is the integrated surface behavior and condition of a material after being modified by a manufacturing process; it describes the influence of surface properties and characteristics upon material functional performance. As the leading-edge field of manufacturing research, SI finishing/machining and the consequent machining-induced complex combination of surface roughness, residual stress, work-hardening, macro and microstructure transformation, strongly affect the fatigue and stress behavior of machined parts. This kind of influence is particularly sensitive and pronounced in the difficult-to-machine materials, which are typically chosen for the most critical applications in the automobile, aerospace and nuclear industry. Thus, well-designed SI processing requirement and accurate SI evaluation model are essential to control and ensure the surface quality and functional performance for these key parts. In this thesis, an SI descriptive model for quantitative characterization and evaluation of surface integrity is proposed based on five principal SI characteristics. Considering the nature of surface integrity, a conceptual framework of an SI model for machined parts is established, in which the SI model is constructed based on the correlations between SI manufacturing processes, SI characteristics and final functionality. This model offers a theoretical basis and guideline for controlling SI characteristics and improving fatigue properties for machined parts. An empirical model for estimating the SI-characteristics-caused effective stress concentration factor (SCF) is established with fatigue life as the evaluating indicator. For a typical difficult-to-machine material, GH4169 superalloy, usually used in internal combustion engines, its grindability and the influence of processing parameters on the five principal SI characteristics are investigated in detail. The correlations between the processing parameters and the SI characteristics, between the processing parameters and the fatigue properties, and between the SI characteristics and the fatigue properties, are analyzed based on an orthogonally-designed grinding experiment and corresponding rotary bending fatigue testing for GH4169 samples within the selective range of grinding processing parameters. The feasibility and effectiveness of the proposed model for estimating the SI effective SCF are also validated by the experimental results, and this has actually offered an equivalent and convenient means for evaluation of SI and fatigue properties. Finally, the conclusions and contribution of the research are discussed, and potential future work to build on this research is identified.
Advanced Machining Processes Of Metallic Materials
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Author : Wit Grzesik
language : en
Publisher: Elsevier
Release Date : 2016-11-15
Advanced Machining Processes Of Metallic Materials written by Wit Grzesik and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-11-15 with Technology & Engineering categories.
Advanced Machining Processes of Metallic Materials: Theory, Modelling and Applications, Second Edition, explores the metal cutting processes with regard to theory and industrial practice. Structured into three parts, the first section provides information on the fundamentals of machining, while the second and third parts include an overview of the effects of the theoretical and experimental considerations in high-level machining technology and a summary of production outputs related to part quality. In particular, topics discussed include: modern tool materials, mechanical, thermal and tribological aspects of machining, computer simulation of various process phenomena, chip control, monitoring of the cutting state, progressive and hybrid machining operations, as well as practical ways for improving machinability and generation and modeling of surface integrity. This new edition addresses the present state and future development of machining technologies, and includes expanded coverage on machining operations, such as turning, milling, drilling, and broaching, as well as a new chapter on sustainable machining processes. In addition, the book provides a comprehensive description of metal cutting theory and experimental and modeling techniques, along with basic machining processes and their effective use in a wide range of manufacturing applications. The research covered here has contributed to a more generalized vision of machining technology, including not only traditional manufacturing tasks, but also potential (emerging) new applications, such as micro and nanotechnology. Includes new case studies illuminate experimental methods and outputs from different sectors of the manufacturing industry Presents metal cutting processes that would be applicable for various technical, engineering, and scientific levels Includes an updated knowledge of standards, cutting tool materials and tools, new machining technologies, relevant machinability records, optimization techniques, and surface integrity
Finishing Operations To Enhance Surface Integrity Of Parts
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Author : Gilles Dessein
language : en
Publisher: Mdpi AG
Release Date : 2023-11-13
Finishing Operations To Enhance Surface Integrity Of Parts written by Gilles Dessein and has been published by Mdpi AG this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-11-13 with Science categories.
Surface integrity management is remarkably important when metal alloys are used to manufacture relevant parts. Advanced materials such as titanium, nickel alloys, non-ferrous alloys, or special steels make surface integrity preservation after machining particularly difficult. Consequently, thorough finishing techniques are required to rectify the surface integrity. Engineering surfaces that exemplify the importance of surface integrity control are typically found in the transportation industry. Pieces formed using complex curved surfaces, such as turbine blades or landing gears, and molds and dies for upsetting operations are good examples. These kinds of parts are often manufactured through 3- or 5-axis machining with the aid of successive adjacent passes of hemispherical tools, whereas this ball-end milling strategy allows one to achieve complex surfaces by following the desired shape through NC interpolations generated by a CAM (it also has deep constraints). In this context, processes such as burnishing, honing, plateau-honing, grinding, and shot-peening can contribute to improving the described surfaces in terms of texture, residual stress, and hardness, and are easily maneuverable from a procedural point of view. This Special Issue collected the research results on these kinds of finishing processes, which are very important to the transportation industry.
Machining Of Metal Matrix Composites
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Author : J. Paulo Davim
language : en
Publisher: Springer Science & Business Media
Release Date : 2011-09-18
Machining Of Metal Matrix Composites written by J. Paulo Davim 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 2011-09-18 with Technology & Engineering categories.
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.
A Cost Effective Approach To Enhance Surface Integrity And Fatigue Life Of Precision Milled Forming And Forging Dies
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Author : Andreas Reimer
language : en
Publisher:
Release Date : 2019
A Cost Effective Approach To Enhance Surface Integrity And Fatigue Life Of Precision Milled Forming And Forging Dies written by Andreas Reimer and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with categories.
The machining process determines the overall quality of produced forming and forging dies, including surface integrity. Previous research found that surface integrity has a significant influence on the fatigue life of the dies. This thesis aims to establish a cost-effective approach for precision milling to obtain forming and forging dies with good surface integrity and long fatigue life. It combined experimental study accompanied by Finite Element Modelling and Artificial Intelligence soft modelling to predict and enhance forming and forging die life. Four machining parameters, namely Surface Speed, Depth of cut, Feed Rate and Tool Lead Angle, each with five levels, were investigated experimentally using Design of Experiment. An ANOVA analysis was carried out to identify the key factor for every Surface Integrity (SI) parameter and the interaction of every factor. It was found that the cutting force was mostly influenced by the tool lead angle. The residual stress and microhardness were both significantly influenced by the surface speed. However, on the surface roughness it was found that the feed rate had the most influence. After the machining experiments, four-point bending fatigue tests were carried out to evaluate the fatigue life of precision milled parts at an elevated temperature in a low cycle fatigue set-up imitated for the forming and forging production. It was found that surface roughness and hardness were the most influential factors for fatigue life. A 3D-FE-Modelling framework including a new material model subroutine was developed; this led to a more comprehensive material model. A fractional factorial simulation with over 180 simulations was carried out and validated with the machining experiment. Based on the experimental and simulation results, a soft prediction model for surface integrity was established by using Artificial Neural Networks (ANN) approach. These predictions for SI were then used in a Genetic Algorithm model to optimise the SI. The confirmation tests showed that the machining strategy was successfully optimised and the average fatigue duration was increased by at least a factor of two. It was found that a surface speed of 270 m/min, a feed rate of 0.0589 mm/tooth, a depth of cut of 0.39 mm and a tool lead angle of 16.045° provided the good surface integrity and increased fatigue performance. Overall, these findings conclude that the fundamentals and methodology utilised have developed a further understanding between machining and forming/forging process, resulting in a good foundation for a framework to generate FE and soft prediction models which can be used to in optimisation of precision milling strategy for different materials.