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Optics Manufacturing Using Magnetorheological Finishing
Key Engineering Materials, 2008Magnetorheological finishing (MRF) is a novel precision optical machining technology. Owing to its flexible finishing process, MRF can eliminate subsurface damage, smooth rms micro roughness and correct surface figure errors. The finishing process can be easily controlled by a computer.
Gui Wen Kang, Fei Hu Zhang
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Progress Update in Magnetorheological Finishing
International Journal of Modern Physics B, 1999In magnetorheological finishing (MRF), magnetically stiffened magnetorheological (MR) abrasive fluid flows through a preset converging gap that is formed by a workpiece surface and a moving rigid wall, to create precise material removal and polishing. Theoretical analysis of MRF, based on Bingham lubrication theory, illustrates that the formation of a
William Kordonski, Don Golini
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Magnetorheological Finishing of freeform optics
Optifab 2007: Technical Digest, 2007New optical designs containing freeform optics have recently begun appearing in systems. Applications have incorporated parts ranging in size from small (e.g.: ~5 – 10 mm rectangles) to large (e.g.: astronomical applications). To meet these needs, QED Technologies recently introduced two solutions using its Q22-Y and Q22-950F platforms ...
Christopher Hall +3 more
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Magnetorheological Ball End Finishing Process
Materials and Manufacturing Processes, 2012Finishing of three-dimensional (3D) surfaces such as grooves, projections, or complex in depth profiles on workpiece surfaces is a challenging task for the many existing advanced fine finishing processes. The advanced fine finishing processes have been developed to precisely control the abrading forces through external magnetic field.
Anant Kumar Singh +2 more
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Magnetorheological-suspension-based finishing technology
SPIE Proceedings, 1998In magnetorheological finishing (MRF) the mechanical energy for material removal is generated by the hydrodynamic flow of a magnetorheological (MR) polishing suspension through a converging gap that is formed by a workpiece surface and a moving rigid wall.
William I. Kordonski +4 more
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Automated insular surface finishing by ball end magnetorheological finishing process
Materials and Manufacturing Processes, 2021Ball end magnetorheological finishing (BEMRF) is a process employed for precision finishing of flattened, intricate form complex 3D surfaces up to the nano level.
Faiz Iqbal +3 more
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Mathematics model of magnetorheological finishing
SPIE Proceedings, 2000According to Preston equation, mathematics model of magnetorheological finishing (MRF) is established in this paper. We analyze the pressure acting on workpiece of this model, and find out that the pressure consists of hydrodynamic pressure and magnetization pressure.
Fengdong Zhang, Xuejun Zhang, Jingchi Yu
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Fine-finishing of stepped cylindrical workpiece using magnetorheological finishing process
Materials Today: Proceedings, 2021Abstract A various stepped cylindrical workpieces are commonly known for their functionality in different industrial components such as hydraulic or pneumatic actuators, plungers, etc. However, fine-finishing of stepped cylindrical workpiece (made of softer materials) is difficult by grinding operation because of its rigid tool structure.
Ajay Singh Rana +2 more
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Magnetorheological (MR) Jet Finishing Technology
Fluids Engineering, 2004Conformal (or freeform) and steep concave optics are important classes of optics that are difficult to finish using conventional techniques due to mechanical interferences and steep local slopes. One suitable way to polish these classes of optics is by using a jet of abrasive/fluid mixture. In doing so, the energy required for polishing may be supplied
William I. Kordonski +2 more
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Ball End Magnetorheological Finishing Using Bidisperse Magnetorheological Polishing Fluid
Materials and Manufacturing Processes, 2014A scheme to finish workpiece surface in nanometer range and obtain defect free surface using bidisperse magnetorheological polishing fluid (MRPF) by ball end magnetorheological finishing (BEMRF) tool is presented. Bidisperse MRPF consist of micron size CS and HS grade of carbonyl iron powder (CIP) with different volume fraction combinations within 20 ...
Mahendra Niranjan +2 more
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