Download or read book Surface Generation and Damage Mechanism in Ultra precision Grinding of Brittle Materials written by Quanli Zhang and published by . This book was released on 2016 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effects of materials microstructure on the surface damage mechanism and surface generation is then studied in the third part, focusing on the effect of binder addition. Even though Co and Si can improve the density and toughness of bulk materials, the different mechanical properties between the composition phases and the existence of phase boundaries both contributed to the non-uniform material removal rate and resulted in the formation of reliefs, edge chipping and grain dislodgement. Moreover, the phase transformation induced volume change of Si and the extrusion of Co under the dynamic pressure of the diamond grits lead to the generation of projections on the machined surface. No obvious oxidation of Co and Si occurred for WC/Co and RB-SiC/Si under high spindle speed grinding (HSSG) with minimum quantity lubrication (MQL). In the fourth part, the wear mechanism of the diamond wheel is studied, and its impact on the surface generation is analyzed. The wheel wear mechanism involves rapid loss of the sharp edge, grit splintering, flattening, and oxidation. Two appropriate dressing methods are proposed to obtain a sharp edge on the diamond wheel. With the well prepared wheels, two types of functional surfaces are machined by ultra-precision grinding. The results showed that with the proposed grinding protocol, the form accuracy and surface finish could reach 0.28 Îơm (PV), 9 nm (Ra) for the ÎŒ15 mm TiC based hemisphere couples and 0.64 Îơm (PV), 6 nm (Ra) for the ÎŒ20 mm 'Water-drop' surface on binderless tungsten carbide. The originality and significance of the present research is shown in the following three aspects: (i) new grinding induced surface damage mechanism is identified, including the impact of C segregation, preferred phase growth, etc., so the present research contributes to the understanding of the machining induced surface damage mechanism; (ii) the effects of materials microstructure and wheel wear on the surface characteristics of typical engineering carbides in ultra-precision grinding with a sharp edge wheel are analyzed, and comprehensive knowledge of the surface generation in ultra-precision grinding of brittle materials is achieved; (iii) this study provides clear comprehension on the technique to machine functional surfaces by wheel normal grinding, and it promotes the development of the grinding technology of hard and brittle materials.
Download or read book Microfabrication and Nanomanufacturing written by Mark J. Jackson and published by CRC Press. This book was released on 2005-11-10 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanotechnology, seen as the next leap forward in the industrial revolution, requires that manufacturers develop processes that revolutionize the way small products are made. Microfabrication and Nanomanufacturing focuses on the technology of fabrication and manufacturing of engineering materials at these levels. The book provides an overview of techniques used in the semiconductor industry. It also discusses scaling and manufacturing processes operating at the nanoscale for non-semiconductor applications; the construction of nanoscale components using established lithographic techniques; bulk and surface micromachining techniques used for etching, machining, and molding procedures; and manufacturing techniques such as injection molding and hot embossing. This authoritative compilation describes non-traditional micro and nanoscale processing that uses a newly developed technique called pulsed water jet machining as well as the efficient removal of materials using optical energy. Additional chapters focus on the development of nanoscale processes for producing products other than semiconductors; the use of abrasive particles embedded in porous tools; and the deposition and application of nanocrystalline diamond. Economic factors are also presented and concern the promotion and commercialization of micro and nanoscale products and how demand will eventually drive the market.
Download or read book Modelling and Experimental Investigation on the Ductile Machining Mechanism in Ultra precision Fly Cutting of Brittle Materials for Functional Surface written by Zhanwen Sun and published by . This book was released on 2019 with total page 197 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Materials Processing and Manufacturing III written by Xiao Ming Sang and published by Trans Tech Publications Ltd. This book was released on 2013-08-30 with total page 3444 pages. Available in PDF, EPUB and Kindle. Book excerpt: Selected, peer reviewed papers from the 3rd International Conference on Advanced Engineering Materials and Technology (AEMT 2013), May 11-12, 2013, Zhangjiajie, China
Download or read book Process Diagnostics for Precision Grinding Brittle Materials in a Production Environment written by and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Precision grinding processes are steadily migrating from research laboratory environments into manufacturing production lines as precision machines and processes become increasingly more commonplace throughout industry. Low-roughness, low-damage precision grinding is gaining widespread commercial acceptance for a host of brittle materials including advanced structural ceramics. The development of these processes is often problematic and requires diagnostic information and analysis to harden the processes for manufacturing. This paper presents a series of practical precision grinding tests developed and practiced at Lawrence Livermore National Laboratory that yield important information to help move a new process idea into production.
Download or read book Fly Cutting Technology for Ultra precision Machining written by Suet To and published by Springer Nature. This book was released on 2023-09-24 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt: This handbook covers the fly cutting technique, an ultra-precision mechanical machining technology which is regarded as the fastest and most reliable low-cost machining method to generate high quality complex surfaces. The ultra-precision raster milling provides more flexibility and suitability for freeform and structural surfaces with a uniform quality with sub-micrometric form error and nanometric surface roughness. These surfaces are widely applied into optics, medicine, biotechnology, electronics, and communications. The fundamental and latest advancing knowledge of fly-cutting technology is important for the future development and applications in ultra-precision mechanical machining technology. This book provides a good reference for fly-cutting technology in ultra-precision machining for undergraduate and postgraduate students, researchers, engineers, and postdoctoral fellow in advanced manufacturing area. It gives the audience an overview of the working principles, process mechanism, salient features, applications, and research directions of ultra-precision fly-cutting technology.
Download or read book Surface Generation in Ultra precision Diamond Turning written by W. B. Lee and published by John Wiley & Sons. This book was released on 2003-02-07 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: An Engineering Research Series title. One of the remarkable achievements of modern manufacturing techniques is the ability to achieve nano-metre surface finishes. Ultraprecision machining based on single-point diamond turning (SPDT) is a very important technique in the manufacture of high-precision components where surface finish is critical. Complex optical surfaces, for example, can be produced without the need for post-machining polishing. This book focuses on the aspect of modelling nano-surface generation in ultra precision SPDT. Potential industrial applications in the prediction of surface quality, the process optimization, and precision mould manufacturing are also studies. The essential differences between single-point diamond turning and conventional machining are described. The history and technology of single-point diamond turning are presented and single chapters emphasize the related metrology and cutting mechanics. Important aspects of surface generation are also discussed. Features of the text are the sound approach, systematic mathematical modelling, and computer-aided simulation of surface generation in the development of surfaces exhibiting nano-surface qualities. TOPICS COVERED INCLUDE: Fundamentals of ultra-precision diamond turning technology Cutting mechanics and analysis of microcutting force variation Mechanisms of surface generation Characterization and modelling of nano-surface generation Computer-aided simulation of nano-surface generation Diamond turning of aspheric optics. Based upon the extensive experience of the authors Surface Generation in Ultra-precision Diamond Turning: Modelling and Practices will be of interest to engineers, scientists, and postgraduate students.
Download or read book Advanced Optical Manufacturing Technologies written by Li Yang and published by SPIE-International Society for Optical Engineering. This book was released on 2006 with total page 808 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of SPIE present the original research papers presented at SPIE conferences and other high-quality conferences in the broad-ranging fields of optics and photonics. These books provide prompt access to the latest innovations in research and technology in their respective fields. Proceedings of SPIE are among the most cited references in patent literature.
Download or read book Processing Technology of Brittle Crystal Materials written by Chen Li and published by Mdpi AG. This book was released on 2023-09-14 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this reprint, the mechanical properties and material removal behaviors of brittle crystals and ceramics are evaluated using the nanoindentation and scratch tests. Some advanced processing technologies oforf brittle crystals, ceramics, and composite materials are proposed, such as precision grinding, rotary ultrasonic milling and drilling, continuous polishing, thermal-controlled fracture cutting, laser processing, abrasive flow machining, and the additive manufacturing process. In addition, the relationship between the critical cutting depth and the maximum undeformed chip thickness on the removal mode of brittle materials is analyzed. The theoretical models of grinding force and surface generation are developed by considering the brittle-to-ductile transition, arc-shaped effect, and synchronous vibration of the wheel. These advanced theoretical models and processing methods effectively improve the surface integrity of the workpiece and machining efficiency, and reduced the cutting force and tool wear.
Download or read book Journal of Research of the National Institute of Standards and Technology written by and published by . This book was released on 1994 with total page 904 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reports NIST research and development in the physical and engineering sciences in which the Institute is active. These include physics, chemistry, engineering, mathematics, and computer sciences. Emphasis on measurement methodology and the basic technology underlying standardization.
Download or read book Biomanufacturing written by Chander Prakash and published by Springer. This book was released on 2019-03-20 with total page 271 pages. Available in PDF, EPUB and Kindle. Book excerpt: Current Trends in Biomanufacturing focuses on cutting-edge research regarding the design, fabrication, assembly, and measurement of bio-elements into structures, devices, and systems. The field of biomaterial and biomanufacturing is growing exponentially in order to meet the increasing demands of for artificial joints, organs and bone-fixation devices. Rapid advances in the biological sciences and engineering are leading to newer and viable resources, methods and techniques that may providing better quality of life and more affordable health care services. The book covers the broad aspects of biomanufacturing, including: synthesis of biomaterials; implant coating techniques; spark plasma sintering; microwave processing; and cladding, powder metallurgy and electrospinning. The contributors illustrate the recent trends of biomanufacturing, highlighting the important aspects of biomaterial synthesis, and their use as feedstock of fabrication technologies and their characterization, along with their clinical practices. Current Trends in Biomanufacturing updates researchers and scientists the novelties and techniques of the field, as it summarises numerous aspects of biomanufacturing, including synthesis of biomaterials, fabrication of biomedical structures, their in-vivo/ in-vitro, mechanical analysis and associated ISO standards.
Download or read book Micromanufacturing Processes written by V.K. Jain and published by CRC Press. This book was released on 2016-04-19 with total page 429 pages. Available in PDF, EPUB and Kindle. Book excerpt: Increased demand for and developments in micromanufacturing have created a need for a resource that covers both the science and technology of this rapidly growing area. With contributions from eminent professors and researchers actively engaged in teaching, research, and development, Micromanufacturing Processes details the basic principles, tools,
Download or read book Proceedings Of Precision Grinding of Brittle Materials written by American Society for Precision Engineering. Spring Topical Meeting on Precision Grinding of Brittle Materials and published by . This book was released on 1996 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Manufacturing Engineering Transactions written by Society of Manufacturing Engineers and published by . This book was released on 1983 with total page 514 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nanofinishing Science and Technology written by Vijay Kumar Jain and published by CRC Press. This book was released on 2016-12-12 with total page 487 pages. Available in PDF, EPUB and Kindle. Book excerpt: Finishing is the final operation after a part is sized and shaped. Currently in high tech industries, there is a demand for nano level surface finishing of components. This process is done to improve the surface finish, to remove the recast layer, or to remove surface and sub-surface defects. The result is low friction, longer product life, and low power requirements. Equally important is the aesthetic aspect of the product. This subject is growing very fast from the technology as well as a science point of view. Books on this subject are very limited, particularly those ones that deal with both the science as well as the technology aspects.
Download or read book Applied mechanics reviews written by and published by . This book was released on 1948 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
