Author: Philip King
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Metal casting is an old but important manufacturing technology, with an estimated 90% of durable manufactured products containing a casting. While traditional metal casting has existed for thousands of years, it remains a complex process under controlled conditions that suffers from variable casting outcomes, where the same casting design can have on casting run be defect free, and another casting run that must be scrapped. This variability has long been considered unavoidable, and even acceptable by the metal casting community. However, this outlook is no longer feasible, as nations across the world try to improve sustainability and reduce energy consumption. This dissertation presents original research to improve the performance of sand casting, the most widely used metal casting process, so that the industry can improve its sustainability. Leveraging additive manufacturing (AM) via 3D sand-printing enables us to reimagine the design principles of 3D mold geometry to improve casting quality and reduce casting variation. In this research, 3D sprue geometries were systematically studied for the naval alloy nickel aluminum bronze (NAB). When compared to the straight sprue geometry traditionally used in industry, the optimized 3D sprue geometries increased the ultimate flexural strength by 28% with while also reducing the variation with statistical significance. In addition to 3D sprue geometries, this dissertation studied 3D runner geometries for both AM and traditional molds. The optimized 3D runner geometries improved casting consistency by reducing the variance of the ultimate flexural strength by a statistically significant 74%. To accelerate our understanding of melt filling in sand molds, this dissertation also investigated new process monitoring techniques that can be integrated with IoT sensors (internet-of-things) with the potential to rapidly identify defective castings. Computer vision tracked the melt head in the runner system of open molds to extract its velocity, while ultrasonic sensors provided a means to measure in-gate velocity that previously could not be measured. This novel process measured the liquid metal surface height as the mold filled and then calculated the in-gate velocity using the surface height data. Overall, the innovations presented in the dissertation have made original contributions to the science of 3D mold design via 3D sand-printing to improve casting performance and in-process monitoring capabilities.
Author: Westport Museum for History & Culture
Publisher: Arcadia Publishing
ISBN: 1439670706
Category : History
Languages : en
Pages : 128
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Book Description
Westport, Connecticut, started as a 17th-century colonial English settlement. Nestled on the shores of Long Island Sound and at the mouth of the Saugatuck River, the area was ideally placed for farming, fishing, and commerce. Westport was formally incorporated as a distinct municipality in 1835 and would evolve into a factory town, a bucolic retreat for both the wealthy and the common man, an enclave for artists and performers, and finally, a bedroom community for New York City. Notable townsfolk have included E.T. Bedford, a Standard Oil executive and philanthropist; inventor Benjamin Toquet; and William Phelps Eno, the "father of traffic safety." F. Scott Fitzgerald penned The Great Gatsby while summering in Westport in 1920. Silent film star W.S. Hart called the town home, as did Paul Newman and Joanne Woodward, Bette Davis, and many more. Artists George Hand Wright, Robert Lamdin, Tracy Sugarman, and others were part of a vibrant art community that spanned nearly 100 years. The town retains its cultural flair with several institutions, such as the Westport Country Playhouse and Museum of Contemporary Art.
Author: David Hounshell
Publisher: Plunkett Lake Press
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 745
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Book Description
“In From the American System to Mass Production, David A. Hounshell has provided a detailed, thoughtful, and comprehensive examination of American industrial technology from the early 1800s through the 1930s. Lavishly illustrated with 19th-century prints and more recent photographs of factory interiors and industrial products, this important work traces the direct and indirect routes down the road toward modern American industrial civilization. For business and labor historians and for historians of American technology and industrialization, Hounshell’s book will fill many gaps in the history of the technical contours of modern industrial America... [the book] begins with an examination of the origins of the American system of manufactures in government and private arms production and then moves to the sewing machine, woodworking, agricultural equipment, bicycle, and automobile industries. It touches on the important inventors and innovators and describes their fundamental contributions in these American industries. Most of the principal figures and institutions are covered: Simeon North, Eli Whitney, Thomas Blanchard, John H. Hall, and Samuel Colt in armories, Eli Terry and Seth Thomas in the clockmaking industry, the Wheeler and Wilson, Willcox and Gibbs, and Singer sewing machine firms, the Singer woodworking plant, the McCormick Reaper works, the Columbia, Pope, and Western Wheel Works bicycle companies, and the Ford and General Motors automotive corporations... Hounshell’s work is a major contribution to the social history of technical innovators and their innovations... All in all, From the American System to Mass Production is an impressive work. In his documentation of the history of American industrial technology, Hounshell has demonstrated the slow evolution and the near-failure of large-scale, capital-intensive, and work-degrading industrial systems. Whereas other historians of technology have tended to tread too lightly on the social dimensions of technical change, Hounshell has provided an excellent social analysis of the networks of innovators and their role in the diffusion of armory practices and other industrial advances from industry to industry.” — Technology and Culture “Mr. Hounshell is an enthusiastic, lively writer, yet very careful scholar. He is cautious in his conclusions and candid about what is debatable. He offers several sides of every issue; he does not judge particular technologies as good or bad... What stands out in this history is how slowly what appears to be a sensible, productive and efficient system of manufacturing was adopted, chiefly because it required a change in the mind-set of managers, changes in skills and work habits of workers, and disciplined procedures and practices throughout the plants.” — New York Times Book Review “David Hounshell’s history of the evolution of American production methods has few rivals; in execution of the theme, it has none... Hounshell carefully documents the development, transfer, and modification of the technology of the manufacture of interchangeable parts from firm to firm and industry to industry... A series of excellent technical photographs and Hounshell’s own field trials support his argument.” — Science “[A] meticulous study of mass production’s roots and early flowering... An able researcher, [Hounshell] follows the trail of early manufacturing ideas and shows how they were gradually perfected and diffused throughout different industries before converging in Ford’s miracle at Highland Park.” — Wall Street Journal “[An] important study which offers a convincing reinterpretation of the development of mass production in the United States. [Hounshell] has combined substantial new archival research with a synthesis of the mass of new work completed by others in the past three decades.” — Journal of Economic History
Author: Evan N. Kantwell
Publisher: Nova Publishers
ISBN: 9781604560978
Category : Current Events
Languages : en
Pages : 198
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Book Description
Has anyone actually seen a bridge being built in America? This editor has travelled for almost 40 years in America without seeing a single one being constructed -- and few even being repaired. Some critics point out that America has built excellent bridges in Vietnam and Iraq which indicates that the knowledge base remains intact. Others say that individual states cannot feed their armies of bureaucrats and fund their plush pensions and health care programs and still expect to build bridges. And the federal government cannot be counted on for much of anything useful. This book presents recent reports focusing on this part of America's crumbling infrastructure.
Author: M. G. Lay
Publisher: CRC Press
ISBN: 0203892534
Category : Technology & Engineering
Languages : en
Pages : 942
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Book Description
This fully revised fourth edition of Max Lay’s well-established reference work covers all aspects of the technology of roads and road transport, and urban and rural road technology. It forms a comprehensive but accessible reference for all professionals and students interested in roads, road transport and the wide range of disciplines involved with roads. International in scope, it begins with the preliminary construction procedures; from road planning policies and design considerations to the selection of materials and the building of roads and bridges. It then explores road operating environments that include driver behaviour, traffic flow, lighting and maintenance, and assesses the cost, economics, transport implications and environmental impact of road use. It draws on Max Lay’s unparalleled consulting and operational experience in the financing, planning, design, construction, operation and management of roads in various countries. It forms an indispensable resource for transport planning, engineering, operations and economics.
Author: Zhichao Lian
Publisher: BoD – Books on Demand
ISBN: 9533072121
Category : Technology & Engineering
Languages : en
Pages : 456
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Book Description
The grandest accomplishments of engineering took place in the twentieth century. The widespread development and distribution of electricity and clean water, automobiles and airplanes, radio and television, spacecraft and lasers, antibiotics and medical imaging, computers and the Internet are just some of the highlights from a century in which engineering revolutionized and improved virtually every aspect of human life. In this book, the authors provide a glimpse of new trends in technologies pertaining to devices, computers, communications and industrial systems.
Author:
Publisher:
ISBN:
Category : Industrial arts
Languages : en
Pages : 872
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Author: P.F. Mcgoldrick
Publisher: Springer
ISBN: 9781475713572
Category : Science
Languages : en
Pages : 506
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Author:
Publisher: National Academies
ISBN:
Category : Business & Economics
Languages : en
Pages : 196
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Book Description
Author:
Publisher:
ISBN:
Category : Civil engineers
Languages : en
Pages : 624
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