loose abrasive grinding mirror with draper machine

  • Measurement of large convex aspheres

    2016-9-1 · pointing. A swing-arm profilometer is used to guide the aspherizing and loose-abrasive grinding. This instrument which is mounted to the polishing machine measures surface profiles with 50 nm rms accuracy. Both of these tests have been successfully used at the Steward Mirror Lab for measuring the 1 .15-rnsecondary for the Sloan Digital Sky

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  • Polishing Sponges Polishing Power Tool Draper Tools

    180mm Polishing SpongeLight Cut for 44190. For use with 180mm angle polishers. Hook and loop fixing. Packed in polythene bag with header card. more. Stock No 46298 Part No APT121 View more.

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  • Processing (Grinding and Polishing) SpringerLink

    W. Rupp "Loose Abrasive Grinding of Optical Surfaces" Appl. Opt. 11 (12) 2797–2810 (1972) ADS CrossRef Google Scholar 7.21 M.G. Schinker W. Döll "Basic investigations into the high speed processing of optical glasses with diamond tools" Proc. SPIE 381

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  • US6042459ASurface machining method and apparatus

    Loose abrasive for lapping polishing etc. is mainly used in mirror grinding for brittle materials such as semiconductor materials and ceramics. The loose abrasive is suitable for obtaining a flat and smooth surface however it is not suitable for the grinding which

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  • Polishing Sponges Polishing Power Tool Draper Tools

    180mm Polishing SpongeLight Cut for 44190. For use with 180mm angle polishers. Hook and loop fixing. Packed in polythene bag with header card. more. Stock No 46298 Part No APT121 View more.

    Chat Online
  • What laser optics designers need to know about high-LIDT

    2021-5-19 · Grinding and lapping. Fabrication of laser optics begins with multiple steps of each of two processes 1) fixed abrasive grinding and 2) loose abrasive grinding also known as lapping. Each step gets the optic closer to its finished shape and size.

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  • Advanced Abrasive Processes For Manufacturing

    heywords polishing smoothing off-axis asphere mirror segment edge mid-spatial frequency Abstract. This paper describes the application of loose-abrasive processes to the manufacture of 1.4 meter off-axis aspheric hexagonal mirror-segments. These are prototypes for the 39 m European Extremely iarge Telescope (E-ELT).

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  • Surface Finish QualityLeader in Precision Machine

    Grit size and Surface Finish. As an example on a steel part hardened to 60 HRc lapped using silicon carbide 500 grit a pressure of 250 g/cm squared will produce a surface finish of about Ra= 0.2 my (N4) or Rz 0.6-0.8 whereas by reducing the pressure to 50 g/cm squared a surface finish of about Ra= 0.05 my (N2) or Rz 0.2-0.3 can be obtained.

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  • Processing (Grinding and Polishing) SpringerLink

    W. Rupp "Loose Abrasive Grinding of Optical Surfaces" Appl. Opt. 11 (12) 2797–2810 (1972) ADS CrossRef Google Scholar 7.21 M.G. Schinker W. Döll "Basic investigations into the high speed processing of optical glasses with diamond tools" Proc. SPIE 381

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  • The Lapping ProcessLeader in Precision Machine

    If there is prevention from the abrasive grain rolling either by a corresponding selection of the carrier plate pressure or the fluid this will cause the particles to stick. If the abrasive grain particles stick then it will lead to a more abrasive material deformation process in a similar manner to grinding or honing.

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  • Measurement of large convex aspheres — University of

    In addition to this test a swing arm profilometer was built to measure the rough surface during aspherization and loose abrasive grinding. The machine uses simple motions and high quality components to achieve 50 nm rms measurement accuracy over 1.8-m mirrors.

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  • 1.- Fabrication ProcessesSPIE

    1999-4-23 · Transition between brittle and ductile mode in loose abrasive grinding Donald Golini Stephen D. Jacobs 1990 Ductile regime grinding of glass and other brittle materials by the use of ultrastiff machine tools William J. Wills-Moren Keith Carlisle Patrick A. McKeown Paul Shore 1990 Center for Optics Manufacturing deterministic microgrinding

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  • Polishing of a 6.5 m f/1.25 mirror for the first Magellan

    2016-9-1 · For loose-abrasive grinding and polishing we use the same stressed lap comprising a 1.5 m aluminum plate 50 mm thick and 18 moment-generating actuators around the edge of the plate to bend it elastically. Three more actuators apply lifting forc-es to control polishing pressure and pressure gradients.

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  • Manufacture of the second 8.4 m primary mirror for the

    The new polishing machine has two carriages for polishing tools allowing use of two 1.2 m stressed laps during loose-abrasive grinding and early polishing followed by final figuring with a stressed lap and a small tool for local figuring. KWActive optics. KWOptical fabrication. KWOptical testing. KW

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  • What laser optics designers need to know about high-LIDT

    2021-5-19 · Grinding and lapping. Fabrication of laser optics begins with multiple steps of each of two processes 1) fixed abrasive grinding and 2) loose abrasive grinding also known as lapping. Each step gets the optic closer to its finished shape and size.

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  • Exploration on Processing and Treatment Techniques of

    2021-1-21 · 3 Image 3 Drilling machine4 Image 4 Hollow trepanning drill. Grinding . Grinding level rough grinding fine grinding and accurate grinding. Rough grinding the purpose is to mold and enable the workpiece with a certain geometric shape. Using loose abrasive or binding abrasive on the surface of the quartz glass.

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  • What is Single Double Side Fine Grinding

    Fine Grinding (flat partssingle or double-side) is the abrasive machining process for removing material using a bonded Superabrasive wheel at low speed with a liquid to keep the part cool. The fixed grain of a geometrically indefinable cutting shape acts like a plow (fig. 3) and material is

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  • Manufacture of the second 8.4 m primary mirror for the

    The new polishing machine has two carriages for polishing tools allowing use of two 1.2 m stressed laps during loose-abrasive grinding and early polishing followed by final figuring with a stressed lap and a small tool for local figuring. KWActive optics. KWOptical fabrication. KWOptical testing. KW

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  • KEY PARAMETERS IN LOOSE ABRASIVE MACHINING

    2021-3-9 · onto the workpiece. Common processes in bonded abrasive are Grinding Honing Tape finishing Buffing and Abrasive sawing 2. In loose abrasive processes there is no structure connecting the grains. They may be applied without lubrication as dry powder or they may be mixed with a lubricant to form a slurry. Since the

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  • US6042459ASurface machining method and apparatus

    Loose abrasive for lapping polishing etc. is mainly used in mirror grinding for brittle materials such as semiconductor materials and ceramics. The loose abrasive is suitable for obtaining a flat and smooth surface however it is not suitable for the grinding which

    Chat Online
  • FIXED-ABRASIVE POLISHING OF GLASS WITH THE

    2019-10-24 · polishing. Grinding may be fulfilled both by loose and fixed abrasive grinding. Loose abrasive grinding generally involves the use of emery and corundum that are much stiffer than fused silica (Fig. 1.3). On some occasions synthetic diamond and alumina are employed for further grinding which can drastically decrease surface roughness

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  • Study on experiment of grinding SiC mirror with fixed abrasive

    2009-5-20 · A brand-new technology for manufacturing SiC reflecting mirror that is different from the traditional method is adopted which is called as fixed abrasive surfacing technology. Not only the new method achieves better mirror quality with bigger diamond in diameter quickly but also because of the fixed motion between the abrasive and workpiece

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  • Advanced Abrasive Processes For Manufacturing

    heywords polishing smoothing off-axis asphere mirror segment edge mid-spatial frequency Abstract. This paper describes the application of loose-abrasive processes to the manufacture of 1.4 meter off-axis aspheric hexagonal mirror-segments. These are prototypes for the 39 m European Extremely iarge Telescope (E-ELT).

    Chat Online
  • Processing (Grinding and Polishing) SpringerLink

    W. Rupp "Loose Abrasive Grinding of Optical Surfaces" Appl. Opt. 11 (12) 2797–2810 (1972) ADS CrossRef Google Scholar 7.21 M.G. Schinker W. Döll "Basic investigations into the high speed processing of optical glasses with diamond tools" Proc. SPIE 381

    Chat Online
  • Exploration on Processing and Treatment Techniques of

    2021-1-21 · 3 Image 3 Drilling machine4 Image 4 Hollow trepanning drill. Grinding . Grinding level rough grinding fine grinding and accurate grinding. Rough grinding the purpose is to mold and enable the workpiece with a certain geometric shape. Using loose abrasive or binding abrasive on the surface of the quartz glass.

    Chat Online
  • FIXED-ABRASIVE POLISHING OF GLASS WITH THE

    2019-10-24 · polishing. Grinding may be fulfilled both by loose and fixed abrasive grinding. Loose abrasive grinding generally involves the use of emery and corundum that are much stiffer than fused silica (Fig. 1.3). On some occasions synthetic diamond and alumina are employed for further grinding which can drastically decrease surface roughness

    Chat Online
  • 1.- Fabrication ProcessesSPIE

    1999-4-23 · Transition between brittle and ductile mode in loose abrasive grinding Donald Golini Stephen D. Jacobs 1990 Ductile regime grinding of glass and other brittle materials by the use of ultrastiff machine tools William J. Wills-Moren Keith Carlisle Patrick A. McKeown Paul Shore 1990 Center for Optics Manufacturing deterministic microgrinding

    Chat Online

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