Journal ArticleDOI
Material removal in magnetorheological finishing of optics
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TLDR
A load for surface indentation by abrasive particles is provided at their interaction near the wall with heavier basic (magnetic) particles, which fluctuate (due to collision) in the shear flow of concentrated suspension.Abstract:
A concept of material removal based on the principle of conservation of particles momentum in a binary suspension is applied to analyze material removal in magnetorheological finishing and magnetorheological jet processes widely used in precision optics fabrication. According to this concept, a load for surface indentation by abrasive particles is provided at their interaction near the wall with heavier basic (magnetic) particles, which fluctuate (due to collision) in the shear flow of concentrated suspension. The model is in good qualitative and quantitative agreement with experimental results.read more
Citations
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Journal ArticleDOI
Physical characteristics of magnetorheological suspensions and their applications
TL;DR: In this paper, the potential applications of magnetorheological suspensions along with their rheological and electro-conductive properties under an applied magnetic field are reviewed, and the range of potential engineering applications of their linear and revolving vibrations include shock absorbers, dampers, clutches, magneto-resistors, magnetic field sensors and ultrafine polishing technology.
Journal ArticleDOI
Recent advances and challenges of abrasive jet machining
TL;DR: Abrasive jet machining (AJM) is a manufacturing technology based on erosion localization and intensification as discussed by the authors, which has a progressively important influence on the machining technology market.
Journal ArticleDOI
Development, fabrication, and testing of an anamorphic imaging snap-together freeform telescope
Matthias Beier,Johannes Hartung,Thomas Peschel,Christoph Damm,Andreas Gebhardt,Sebastian Scheiding,Daniela Stumpf,Uwe D. Zeitner,Stefan Risse,Ramona Eberhardt,Andreas Tünnermann +10 more
TL;DR: In this article, the fabrication chain for the development of an afocal all aluminum telescope using four anamorphic aspherical mirrors is described, and the optical and mechanical design are intended to achieve an enhanced system integration with reduced alignment effort by arranging two optical surfaces monolithically on common mirror bodies.
Journal ArticleDOI
Manufacturing technologies toward extreme precision
TL;DR: In this paper, state-of-the-art high-precision material removal manufacturing technologies, especially ultraprecision cutting, grinding, deterministic form correction polishing, and supersmooth polishing are reviewed and compared with insights into their principles, methodologies, and applications.
Journal ArticleDOI
Advances in polishing of optical freeform surfaces: A review
TL;DR: In this article, the basic concepts and classification of ultra-precision polishing, introduces typical polishing processes, discusses polishing mechanisms and characteristics, and finally indicates the directions for future development of ultra precision polishing.
References
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TL;DR: The fundamental assumption of all theories of plasticity, that of time independence of the equations of state, makes simultaneous description of the plastic and rheologic properties of a material impossible as mentioned in this paper.
Journal ArticleDOI
Chemical processes in glass polishing
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Principles of Abrasive Water Jet Machining
TL;DR: In this article, the authors classified and characterised abrasive materials and the generation of Abrasive Water Jets, and the structure and hydrodynamics of these materials.
Journal ArticleDOI
Particle dynamics in sheared granular matter
TL;DR: The particle dynamics and shear forces of granular matter in a Couette geometry are determined experimentally and agree with a locally Newtonian, continuum model, where the granular medium is assumed to behave as a liquid with a local temperature [deltaV(y)](2) and density dependent viscosity.
Journal ArticleDOI
CFD analysis of journal bearing hydrodynamic lubrication by Bingham lubricant
TL;DR: In this paper, the performance characteristics of a hydrodynamically lubricated journal bearing with a Bingham fluid are derived by means of three-dimensional computational fluid dynamics (3-D CFD) analysis.