(PDF) Grinding of aspherical SiC mirrors
Toroidal mirrors, circular and elliptic cylinder mirrors made of SiC were successfully obtained by automatic grinding operations with high shape accuracy and very low surface roughness The time A precision grinding with electrolytic dressing process was applied to finish mirrors; figure 2 illustrates the experimental grinding setup, which was developed in our previous research A rotary surface grinder, with air hydrostatic bearings for the wheel and work piece spindles, was employed for the experiment Detailed specifications of the setup and grinding conditions are shown in tableA high quality surface finish grinding process to produce Abstract: The characteristics, structural characteristics and composition of the grinding wheel oxide film is revealed by the theoretical analysis and simulating test in predressing process of the ELID ultra precision mirror grinding, and the validity of oxide film formation mechanism analysis is Research on Formation Mechanism of Grinding Wheel Oxide For hogging out, we start with the "chordal stroke" Put the tool on the bottom, add half a teaspoon of #80 grit, sprinkle with water and place the mirror center near the edge of the tool Use 1/3 mirror diameter strokes This means that stroke is 1/3 length in total, 1/6 forward, 1/6th backwardsMirror grinding scope makingMirror Grinding Research kleinkaroovalleycoza Study on a 5axis precision and mirror grinding of glass freeform surface without onmachine wheelprofile truing but the research was only focused on the computer numerical control of grinding machine The mirror grinding of curve surface may be fabricated by the ELID grinding grinding Articles News and Company results for grindingget price mirror grinding research bdrumesbe
Joy of Mirror Making: Rough Grinding BBAstroDesigns
The curve is ground into the mirror face using a grinding tool The curve is pregenerated for you The curve is created by slumping the blank in a kiln over a mold Here are 42 inch [107cm] and 30 inch [762cm] mirrors slumped and annealed to F28 ready for fine grindingÝÝÝÝÝÝÝÝÝÝÝ In his Codice Atlantico, Leonardo offers two of sketches of mirror making machinesÝ One machine is designed for grinding concave mirrors of small focal lengthÝ The other machine, a much larger piece to implement, grinds mirrors of large focal lengthsÝ Though Leonardo da Vinci creates sketches of mirror grinding, one crucial and logical question to ask is whether he Leonardo Da Vinci's mirror making machines At which point of the mirror grinding and polishing process do you begin foucault testing? I am currently working on my first mirror a 9 3/8" dia f59 ground down to 5 microns 1 answer 0 maewert rgyesky Answer 2 years ago Reply Upvote During the rough grinding process you are simply trying to 'hog' out the glass to get the rough figure close to the desired focal point Here we can use the Optical Testing of Parabolic Mirrors : 9 Steps (with How to grind a mirror blank into the wellfigured basis for a Dobsonian telescope How to grind the glass, how to carry out a focus test, how to polish with How to grind a mirror for a telescope YouTubeAll our Mirror Kits contain a Pilkington Float Glass mirror blank and Grinding Tool These arefinished with fine ground edges 180 grade first stage ginding powder 400 grade ginding powder 303 grade smoothing powder Top quality Cerium Oxide Polishing powder Part No Data Sheet: Description: Product Type: Thickness (MM) Specification: Unit Price : QTY: BASKET: QUOTE: MKIT150: 150mm mirror grinding kit grind and polish telescope mirror at
(PDF) Grinding of aspherical SiC mirrors
The mirror freeform grinding may be parameterized by material behavior, tool size and posture, grinding conditions and abrasive tool performance On the base of virtual ballend algorithm, the Fine ceramics have the properties of high hardness, chemical inertness, high thermal resistance and low electrical conductivity, but, because of high hardness and brittleness, they are very difficult to machine Therefore, a superabrasive diamond wheel is used for mirrorlike grinding of this material In this study, an inprocess electrolytic dressing system for carrying out mirrorlike A study of mirrorlike grinding of fine ceramics with in The characteristics, structural characteristics and composition of the grinding wheel oxide film is revealed by the theoretical analysis and simulating test in predressing process of the ELID ultra precision mirror grinding, and the validity of oxide film formation mechanism analysis is verified by ELID experiments Mirror grinding of hard brittle materials can be realized by online real Research on Formation Mechanism of Grinding Wheel Oxide Mirror grinding mainly depends on the precision of the machine tool, cutting and grinding amount and wheel selection and dressing This paper mainly studies the MG1432 highprecision universal cylindrical grinder, exploring the impact on the workpiece roughness through selection and design of various process parameters in grinding, such as changing work table speed in dressing the grinding Mirror Grinding Process Parameter Selection and Design A precision grinding with electrolytic dressing process was applied to finish mirrors; figure 2 illustrates the experimental grinding setup, which was developed in our previous research A rotary surface grinder, with air hydrostatic bearings for the wheel and work piece spindles, was employed for the experiment Detailed specifications of the setup and grinding conditions are shown in tableA high quality surface finish grinding process to produce
Grinding metre scale mirror segments for the EELT ground
In order to reduce manufacturing time for large mirrors, a new UK based research initiative was established with the prime objective to reduce processing time of large scale complex shape surfaces The research proposed a manufacturing chain with rapid lowdamage precision grinding followed by an iterative polishing stage and finally reactive atom plasma figuring, see Fig 2 ELID Mirror Grinding Technology ZHOU Shuguang (Dalian Institute of Technology), et al s:The text introduces the principle, process, features as well as the study and application status both at home and abroad for ELID grinding technology, and describes the wide application prospects for the technology in precision machining manufacturing industry of our countryELID Mirror Grinding Technology《Manufacturing Technology ÝÝÝÝÝÝÝÝÝÝÝ In his Codice Atlantico, Leonardo offers two of sketches of mirror making machinesÝ One machine is designed for grinding concave mirrors of small focal lengthÝ The other machine, a much larger piece to implement, grinds mirrors of large focal lengthsÝ Though Leonardo da Vinci creates sketches of mirror grinding, one crucial and logical question to ask is whether he Leonardo Da Vinci's mirror making machines Gordon Waite used a digital spherometer to test the radius of curvature on one of the two 22" f/40 binoscope mirrorsTesting the 22" Binoscope Mirror After Fine Grinding YouTubeBuy a New 20" Waite Research Mirror If you are thinking about moving up to a large aperture telescope mirror, we have a new Waite Research premium 20" mirror just for you gordon@waiteresearch today Telescope Mirror Fabrication Waite Research has primary mirror blanks in stock and ready to begin polishing Contact gordon@waiteresearch for mirror sizes Waite Research :: Home
A study of mirrorlike grinding of fine ceramics with in
Fine ceramics have the properties of high hardness, chemical inertness, high thermal resistance and low electrical conductivity, but, because of high hardness and brittleness, they are very difficult to machine Therefore, a superabrasive diamond wheel is used for mirrorlike grinding of this material In this study, an inprocess electrolytic dressing system for carrying out mirrorlike In order to reduce manufacturing time for large mirrors, a new UK based research initiative was established with the prime objective to reduce processing time of large scale complex shape surfaces The research proposed a manufacturing chain with rapid lowdamage precision grinding followed by an iterative polishing stage and finally reactive atom plasma figuring, see Fig 2 Grinding metre scale mirror segments for the EELT ground Though Leonardo da Vinci creates sketches of mirror grinding, one crucial and logical question to ask is whether he used such mirrors in his artwork or drawing On this subject, a bevy of scholarly research has surfaced both proclaiming and refuting da Vinci’s use of concave mirrors and lenses Of all the scholarly research debating whether Leonardo used concave mirrors, David Hockney Leonardo Da Vinci's mirror making machines Nowadays telescope mirrors are made from glass which is ground into shape before receiving a reflective coating, but the handgrinding techniques are similar to those that would have been used for speculum metal mirrors In fact, metal mirror grinding itself developed out of the materials, tools and techniques used for grinding spectacle lenses and other forms of glassLooking at the mirror: the craftsmanship of reflecting ELID Mirror Grinding Technology ZHOU Shuguang (Dalian Institute of Technology), et al s:The text introduces the principle, process, features as well as the study and application status both at home and abroad for ELID grinding technology, and describes the wide application prospects for the technology in precision machining manufacturing industry of our countryELID Mirror Grinding Technology《Manufacturing Technology
Testing the 22" Binoscope Mirror After Fine Grinding YouTube
Gordon Waite used a digital spherometer to test the radius of curvature on one of the two 22" f/40 binoscope mirrorsThe ELID (ELectrolytic Inprocess Dressing)grinding is a mirror surface grinding method was invented by ProfOhmori at Materials Fabrication Laboratory of RIKEN (The Institute of Physical and Chemical Research) It is a new technique capable of highly efficient and high quality mirrorsurface grinding for hard and difficulttogrind functional materials such as silicon, ceramics, glass RD｜IMAX Co,LtdHand grinding takes care of this automatically For the smaller sizes of mirrors you will also want to be able to exchange the mirror and tool positions from time to time as the grinding progresses You should research the back issues of the astronomy magazines (Astronomy, Sky and Telescope, etc) as well as the books on the subject in the Mirror grinding machine The Home Shop Machinist Waite Research Debuts New Renegade 20" Newtonian Telescope at Northeast Astronomy Forum Precision optical components and revolutionary "feetontheground" design for ultimate performance April 20, 2013With the introduction of their Renegade 20" f/30 reflector, Waite Research has expanded from the fabrication of precision telescope mirrors into the manufacture of complete Newtonian Waite Research Telescope Mirrors :: HomeBuy a New 20" Waite Research Mirror If you are thinking about moving up to a large aperture telescope mirror, we have a new Waite Research premium 20" mirror just for you gordon@waiteresearch today Telescope Mirror Fabrication Waite Research has primary mirror blanks in stock and ready to begin polishing Contact gordon@waiteresearch for mirror sizes Waite Research :: Home
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