[PDF] Top 20 On the removal of material for polishing aspheric optics

... each aspheric required different null lens to test with, which required extra production of testing ...of polishing is not deterministic, numerous iterative polishing and testing cycles were often ... See full document

... The high-performance machining of curved surfaces is a highly critical process that is crucial in modern engineering applications. Different methodologies and CAM tools have been developed by manufacturers to improve the ... See full document

... and material removal ...and material removal rate in turning of Al6063 aluminium alloy using uncoated carbide insert under dry ...maximum material removal ... See full document

... removal rate, and enhanced surface finish [10]-[12]. Mwangi et al. [11] and Gunawan et al. [12] found that the ultrasonic vibration had successfully enhanced the Electro-Discharge Machining (EDM) capability. While ... See full document

... In EDM, as has been discussed earlier, material removal mainly occurs due to thermal evaporation and melting. As thermal processing is required to be carried out in absence of oxygen so that the process can ... See full document

... H. Dam et.al. [15] presented that a general survey of the processes that govern the ultrasonic machining of ceramics. The results were based on the drilling of holes in seven different ceramics and the aspects considered ... See full document

... The material removal was the convolution of the tool’s local dwell time and influence ...surface removal (mid column of ...of material removal of the whole part’s surface, transacts of ... See full document

... In ECM, the principles of electrolysis are used to remove metal from the workpieces. Faraday’s Laws of electrolysis may be stated as: “the weight of substance produced during electrolysis is directly proportional to the ... See full document

... Wire EDM (WEDM) is a kind of EDM in which a thin wire is utilized to machine electrically conductive material. A spark is created because of the dielectric material between the tool and the workpiece. This ... See full document

... on Material Removal Rate, Electrode Wear Rate and surface roughness in M2 tool ...present material used for the work were Harden up to 62 HRC and then machined with electrode materials of copper and ... See full document

... active polishing developed in this Section has the primary apphcation of figuring the secondary ...lap polishing, the REOSC s pushing-roller and Itek’s CCOS can be categorised into ‘pseudo-active ... See full document

... The polishing robot was developed based on an open architectural industrial robot, where the kinematics and servo control are ...the polishing process after NC machining has hardly automated ...several ... See full document

... Moreover, naked metallic nanoparticles are chemically highly active, and are easily oxidized in air, resulting generally in loss of magnetism and dispersibility, coating helps not only in protecting the core shell but is ... See full document

... By using a Digitised Thesis, I accept that Trinity College Dublin bears no legal responsibility for the accuracy, legality or comprehensiveness of materials contained within the thesis, and that Trinity College Dublin ... See full document

... tooth polishing process by inhibiting the plaque forming bacteria as inferred by the significant reduction of CFU count on in vitro culture plates (Supplementary Figure 1, Supplementary Figure ...to ... See full document

... These are very soft and make polishing difficult and, more importantly, parts of the shell are removed by the replicatillg material so high power magnification of the peel surface is pre[r] ... See full document

... Natural composites exist in both animals and plants. Wood is a composite – it is made from long cellulose fibers (a polymer) held together by a much weaker substance called lignin. Cellulose is also found in cotton, but ... See full document

... planetary polishing process stable flow is provided under the condition that a portion of the workpiece surface deviation from circularity is able to communicate with the densified abrasive medium at least during ... See full document

... silicon [27, 40], and achieved enhanced FWM CE in GO-coated doped silica waveguides of up to 6.9 dB for a 1.5-cm-long waveguide uniformly coated with 2 layers of GO [29]. Moreover, GO has a material absorption ... See full document

... Ideal restoration of the teeth can be developed by restoring the natural contours of extracted teeth. The successful result of restoration has shown the signi fi cance of early initiation of soft tissue contouring when ... See full document