Proceedings Of: Precision Fabrication and Replication PDF Download
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Author: American Society for Precision Engineering. Spring Topical Meeting
Publisher:
ISBN: 9781887706216
Category : Grinding and polishing
Languages : en
Pages : 79
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Book Description
Author: American Society for Precision Engineering. Spring Topical Meeting
Publisher:
ISBN: 9781887706216
Category : Grinding and polishing
Languages : en
Pages : 79
Get Book Here
Book Description
Author: American Society for Precision Engineering. Spring Topical Meeting
Publisher:
ISBN: 9781887706216
Category : Grinding and polishing
Languages : en
Pages : 80
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Book Description
Author: Wing Bun Lee
Publisher: Trans Tech Publications Ltd
ISBN: 3038138428
Category : Technology & Engineering
Languages : en
Pages : 680
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Book Description
Volume is indexed by Thomson Reuters CPCI-S (WoS). The present volumes contain selected papers on the fields of precision engineering - including precision/ultra-precision machining, non-traditional machining, manufacturing systems and machine tools, nano and micro metrology and surface characterization, MEMS/NEMS, advanced moulding and forming, high-precision mechatronics and other technologies which are associated with micro/nano manufacturing. The work provides up-to-date and comprehensive coverage of the progress being made world wide.
Author: Svetan Ratchev
Publisher: Springer Science & Business Media
ISBN: 3642115977
Category : Computers
Languages : en
Pages : 339
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Book Description
The development of new-generation micro-manufacturing technologies and systems has revolutionised the way products are designed and manufactured today with a s- nificant impact in a number of key industrial sectors. Micro-manufacturing techno- gies are often described as disruptive, enabling and interdisciplinary leading to the creation of whole new classes of products that were previously not feasible to ma- facture. While key processes for volume manufacture of micro-parts such as mach- ing and moulding are becoming mature technologies, micro-assembly remains a key challenge for the cost-effective manufacture of complex micro-products. The ability to manufacture customizable micro-products that can be delivered in variable volumes within relatively short timescales is very much dependent on the level of development of the micro-assembly processes, positioning, alignment and measurement techniques, gripping and feeding approaches and devices. Micro-assembly has developed rapidly over the last few years and all the pred- tions are that it will remain a critical technology for high-value products in a number of key sectors such as healthcare, communications, defence and aerospace. The key challenge is to match the significant technological developments with a new gene- tion of micro-products that will establish firmly micro-assembly as a mature manuf- turing process. th The book includes the set of papers presented at the 5 International Precision - sembly Seminar IPAS 2010 held in Chamonix, France from the 14th to the 17th February 2010.
Author: Ekkard Brinksmeier
Publisher: Springer Science & Business Media
ISBN: 3642330010
Category : Technology & Engineering
Languages : en
Pages : 218
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Book Description
High quality optical components for consumer products made of glass and plastic are mostly fabricated by replication. This highly developed production technology requires several consecutive, well-matched processing steps called a "process chain" covering all steps from mold design, advanced machining and coating of molds, up to the actual replication and final precision measurement of the quality of the optical components. Current market demands for leading edge optical applications require high precision and cost effective parts in large volumes. For meeting these demands it is necessary to develop high quality process chains and moreover, to crosslink all demands and interdependencies within these process chains. The Transregional Collaborative Research Center "Process chains for the replication of complex optical elements" at Bremen, Aachen and Stillwater worked extensively and thoroughly in this field from 2001 to 2012. This volume will present the latest scientific results for the complete process chain giving a profound insight into present-day high-tech production.
Author: American Society for Precision Engineering. Annual Meeting
Publisher:
ISBN:
Category : Instrument manufacture
Languages : en
Pages : 566
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Book Description
Author: Lubomyr Taras Romankiw
Publisher: The Electrochemical Society
ISBN: 9781566772143
Category : Computers
Languages : en
Pages : 730
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Book Description
Author: Society of Plastics Engineers. Technical Conference
Publisher:
ISBN:
Category : Plastics
Languages : en
Pages : 1128
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Book Description
Author: British Library. Document Supply Centre
Publisher:
ISBN:
Category : Conference proceedings
Languages : en
Pages : 836
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Book Description
Author: Abolfazl Zolfaghari
Publisher:
ISBN:
Category : Electroforming
Languages : en
Pages : 135
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Book Description
Applications of precise optical components with complex shapes are becoming more popular because of demands for more accurate, smaller size optical components. Although fabrication techniques of the components have advanced in recent years, only molding based methods are typically suitable for mass production. On the other hand, molding based methods are less capable of creating complex optical components. To deal with these limitations, a process based on nickel electroforming is introduced to replicate mold inserts directly from a plastic optical component, which itself can be fabricated by any fabrication methods with high flexibility. Then, using the plated mold insert in precision compression molding, the optical components are replicated. To investigate replication capabilities of the developed method in fabrication of plastic optical components, a polymethylmethacrylate (PMMA) microlens array was replicated to a nickel-plated mold first from another plastic microlens array then mass-produced using compression molding process. Properties of both microlens arrays, were investigated for geometrical accuracy, surface quality, and optical performance. The results demonstrated a promising technique to manufacture plastic optical component with high production rates. Fabrication capabilities of the method in production of infrared optics was also evaluated through producing an infrared microlens array from a plastic microlens array. Comparison between the fabricated infrared microlens array and the plastic microlens array in terms of geometry, surface quality, and optical performance has shown that it is a promising technique for replicating infrared microlens arrays. Using the developed method, a new fabrication method of non-planar optical component with large area was also proposed and demonstrated by producing micro feature on a cylindrical surface. The technique was capable to transfer micro-optical features from a planar surface, which is much easier to produce, to non-planar surfaces. To assess possibility of fabricating complex glass optical surfaces using the developed fabrication technique, a nickel mold of diffractive harmonic diffractive lens (HDL) from a plastic HDL was made. Then, the mold and precision compression molding were used to fabricate glass harmonic diffractive lens. Geometrical analysis and optical performance of the plastic and the fabricated HDL showed that the method is capable to be used in fabrication of precision glass optics as well. Precision compression molding is one of the most suitable mass production methods of optical components with micro/nanoscale surface features. This process suffers from long heating and cooling cycles. To deal with the challenge, a novel precision compression molding was proposed. In the proposed process, induction heating of a thin nickel mold insert is used. In the process, the nickel mold insert is replicated from a plastic optical component as described before. To evaluate cooling and heating cycles of the method, a numerical model of the heating system using finite element method (FEM) was created and run in this research. According to simulation results, heating and cooling rates were significantly improved. Geometrical analysis and optical performance evaluation of the replicated microlens array have shown that the proposed fabrication method has a potential to reduce the problems of conventional bulk heating system.
