Aug 01 2002 · Chatter that limits ground surface finish has been observed in the deterministic microgrinding of brittle optical materials In this article the classical single degree of freedom model for chatter accounting for both work and tool regenerative effects is adapted for contour
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More DetailsInitial data indicates that the newly developed deterministic microgrinding process will generate specular optical surfaces Deterministic microground surfaces with 100 300 angstroms surface finishes 1 2 microns of subsurface damage and 1 wave peaktovalley surface figure have been produced on a range of glass types
Read MoreContour deterministic microgrinding is performed on a Pro80 or eSX platform These platforms utilize software and the latest advancements in machine motion to accurately contour the aspheric shape Then the optics are finished using UltraForm Finishing UFF which is a subaperture polishing process
Read MoreChatter in deterministic microgrinding of optical glasses Chatter in deterministic microgrinding of optical glasses Li Yi 19991111 000000 ABSTRACT In this paper the chatter observed in the deterministic microgrinding of optical glasses is examined Because chatter adversely affects ground surface quality understanding and eliminating chatter could significantly reduce total fabrication
Read MoreThe microstructures arrays are widely used and have good prospects in different applications because of their special and unique engineering functions Micro Vgrooves array is one of the most common micro structures used for optical and biomedical functions Precision grinding is one of the micro mechanical machining technologies for a wide range of hard nonferrous materials to fabricate
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Read MoreInitial data indicates that the newly developed deterministic microgrinding process will generate specular optical surfaces Deterministic microground surfaces with 100 300 angstroms surface finishes 1 2 microns of subsurface damage and 1 wave peaktovalley surface figure have been produced on a range of glass types
Read MoreDETERMINISTIC MICROGRINDING DETERMINISTIC MICROGRINDING Roughness vs Abrasive size Twyman effect E 2 GC1 to E 1 U to C GC3 GC1 to C C I V C I05 to C to U to C to to abr 24 abrasive size L tm 0 ize m 120 130 140 150 Indentation crack size 2c 0 1 kgf jim FIG 4 Dependence of surface microroughness on abrasive size in
Read MoreChatter in deterministic microgrinding of optical glasses Chatter in deterministic microgrinding of optical glasses Li Yi 19991111 000000 ABSTRACT In this paper the chatter observed in the deterministic microgrinding of optical glasses is examined Because chatter adversely affects ground surface quality understanding and eliminating chatter could significantly reduce total fabrication
Read MoreUnlike polishing or lapping however grinding is a deterministic process permitting finely controlled contour accuracy and complex shapes In this paper the development of a research apparatus capable of ductileregime grinding is described Furthermore an analytical and experimental investigation of the infeed rates necessary for ductile
Read MoreIn the Twyman effect 1905 when one side of a thin plate with both sides polished is ground the plate bends The ground side becomes convex and is in a state of compressive residual stress described in terms of force per unit length Newtons per meter induced by grinding the stress Newtons per square meter induced by grinding and the depth of the compressive layer micrometers
Read Morecontour mode deterministic microgrinding cement mill inlet head automatic crusher for stone aggregate in india crushers manufactured in russia shyhdear ade lq
Read MoreHowever its high hardness and large grain size on the order of 100200 micrometers s produced by current powder metallurgy processes present challenges to deterministic microgrinding For example typical contact areas between the tool and work surface for contour grinding are on the order of
Read MoreMicrogrinding Chapter A Tutorial on Deterministic Microgrinding News letter of Center for Optics Manufacturing Convergence Vol 7 number 6 NovDec 1999 Ultraprecision High Stiffness CNC Grinding Machines for Ductile Mode Grinding of Brittle Materials Infrared Technology and Applications SPIE 1320301–313 Google Scholar 91
Read MoreContour Profile 12 Cutting conditions • Milling cutters – Plain milling cutters – Form milling cutters – Face milling cutters – End milling cutters • Cutting conditions Spindle rotation speed D v N
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Read Moretool based micro and ultra precision machining grinding Precision and micro CVD diamond Precision and micro CVD diamondcoated grinding tools Gäbler Jan Pleger Sven 20100401 000000 Both for ultraprecision and for micromachining diamond is used very often as tool material The reason is the very high dimensional stability of diamond due to its extreme hardness
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