Page 1 of 2 - Fine Grinding Plate glass 7 mirror, questions - posted in ATM, Optics and DIY Forum: Ive just finish about 1 hour of fine grinding with 25 micron. The surface looks evenly smooth to the naked eye, under a magnifier of about 4-6x its not much different. I looked under my bino inspection microscope of about 10-20 power and I can now see individual pits, all about the same size ...
Get Quote
After having the ground and face of the mirror flat through the 220, you are good to begin rough grinding the curve into the mirror; Do some fine grinding; Proceed and trying getting a sphere; After getting your final abrasive, you can now perform polishing; There is a question on whether to build or buy a telpe mirror amongst most astronomers.
Get Quote
Grinding – moving the mirror over the tool with grit between) Grinding compound will make tool convex, mirror concave . Grinding Compounds Grinding compound is material much stronger than glass Made of fine powders, grit, in water solution Typical materials silicon carbide, aluminum oxide (sapphire) Start with largest grit
Get Quote
For hand grinding, the coarse grit sequence of 40, 60, 80, 120, 220 is typical (start at the grit size appropriate for your mirror diameter as given in the section above). Silicon Carbide is used almost exclusively. Fine grit sequences vary more, and are often …
Get Quote
Mirror grinding is a grinding that the surface roughness of the workpiece is Ra< 0.01μm, and the light is like a mirror after grinding, so it can be clearly photographed. The flatness of the grinding surface is not greater than 3μm /1000mm. The surface machining of high precision and high added value parts requires mirror grinding. 2. Grinder ...
Get Quote
Draw a grid on the mirror surface with a permanent marker (<--picture) Add the usual half teaspoon of grit, sprinkle with water and grind for a couple of minutes, rotating tool and mirror often. Rinse the mirror and inspect the grid lines. If the grid is …
Get Quote
· The center will deepen during the first stage of fine grinding as contact is achieved …
Get Quote
Fine rotation grinding (FRG) is a typical efficient method for silicon mirror manufacture. A geometric model is developed in this paper to research silicon mirror surface figure control mechanism in FRG process. The model demonstrates the relationship between the grinding spindle obliquity and the mirror surface figure.
Get Quote
Tools for grinding, polishing and machining various materials. Vitrified. Ceramic Grain CX Wheel. Vitrified-bonded Wheel for Gear Grinding "Gear Ace". New Super-finishing Wheel "Keen Stone". Vitrified-Bonded Wheel for Precision Grinding "LIFE KING". New Mirror Grinding Super-finishing Wheel "Mr. …
Get Quote
The fine grade silicon carbide abrasive and nylon fibres in grade 2SF (soft & semi-conformable), or in grade 3SF(slightly harder & more durable) imparts a finer / brighter finish. By the end of this process, you should have a smooth, bright satin …
Get Quote
Grinding an 8″ F/10 Telpe Mirror. For this project (my first time ever grinding a mirror) I ordered an 8″ Black Vitrified Ceramic (BVC) blank without a pregenerated curve from ASM Products in Ste-Basile PQ. Ordering from Canada is always cheaper once you factor in all the taxes – all told the kit cost about $185.
Get Quote
China Grinding Mirror manufacturers - Select 2021 high quality Grinding Mirror products in best price from certified Chinese Ceramics, China Tile suppliers, wholesalers and factory on Made-in-China, page 2
Get Quote
Dry grind is often used in fine grinding, and the grinding grain size of the micro-powder is fine in the W grinding machine 7. Semi-dry research: similar to wet research, used abrasive paste is paste. Grinding can be done both by hand and by grinding machine.
Get Quote
Mirror grinding and figuring consists of four major steps (plus aluminizing). Rough and Fine grinding use hard tools (glass, tile or metal) and harder then glass abrasive grit (Silicon Carbide or Aluminum Oxide). Polishing and Figuring use a soft pitch tool and ultra fine abrasive (Cerium Oxide or Rouge).
Get Quote
In fine grinding, the energy u is over 80 J/mm 3 because of the increased energies of plowing and sliding actions of grains. In abrasive fine-finishing, the equivalent chip thickness becomes smaller than that in the fine grinding, and the total specific energy u is …
Get Quote
Before You Start. Use this checklist to make sure you are ready to start fine grinding: You have completed Rough Grinding, and all the tools and materials used in rough grinding, most of which are also used in fine grinding.; You have the necessary Grit.; You have Plastic Bottles to hold grit-water slurry for your finer abrasives.; You have a Magnifying Lens to inspect pit sizes on your mirror ...
Get Quote
grinding mirror fine Mirror Making During fine grinding these chips will make little scratches. The scratches won't hurt the performance of the mirror but some people are perfectionists. To avoid the scratches keep the mirror edge dull with alumina sandpaper and a bloc
Get Quote
FINE GRINDING THE MIRROR. After generating the mirror curve by rough grinding it remains for us to smooth it by fine grinding and polishing before finally correcting it to a parabola of revolution. Fine grinding is done in about the same way as the last wets of rough grinding, but with a series of finer and finer grits such as 100, 220, 320 ...
Get Quote
debris created during the grinding process. Polishing After the lens is generated and fine ground, it undergoes polishing. Depending on how precise the generation is, the lens may go through several stages of polishing. Whereas the grinding process mechanically removes material by …
Get Quote
The mirror ended up with a very smooth, zone free, nearly spherical figure ready for final figuring. Figure 1: Polishing pads applied to a 9 inch grinding tool. Another local ATM has also tried the polishing pads with abrasive and CeO. His own 17.5" …
Get Quote
Fine grinding produces a surface with little deformation that can easily be removed during polishing. Because of the drawbacks with grinding papers, alternative fine grinding composite surfaces are available, in order to improve and facilitate fine grinding, A …
Get Quote
Fine Grinding The goals of fine grinding are to prepare the curved mirror face so that it is ready for polishing and figuring and make any adjustments of the focal length. Previously in rough grinding we deepened the center of the mirror's face either by …
Get Quote
Grinding the back flat is just the first step in preventing astigmatism. The next step is the proper mirror support. Fine grind and polish the mirror face up. A thin mirror bends over the edge of the tool if it's worked on top, so the problem reduces to supporting the mirror from its underside.
Get Quote
After fine grinding, the mirror has to be polished. The tool - made from plaster - is the same as used for fine grinding but now carries a special polishing layer. The polish commonly used is cerium oxide. In the later stages, several other tools, coated with polishing pitch are in use.
Get Quote
grinding mirror manufacturer/supplier, China grinding mirror manufacturer & factory list, find qualified Chinese grinding mirror manufacturers, suppliers, factories, exporters & …
Get Quote
CNC Grinding of Precision Mirror Surface of Alloy Parts. Cemented carbide is prepared by powder metallurgy with tool steel or alloy steel as the binder phase and refractory metal carbides (mainly WC, TiC) as the hard phase. Its structure is …
Get Quote
So, long story short, I am back to grinding a 6' f/8 this time, The FL now stands at 49" (f/8.1). I had finished fine grinding with 1000 grit SiC and moved to 1200 grit SiC but only to realize (after 30mins of grinding) that the seller had incorrectly labelled the powder as 1200 grit. I ended up with large pits all over the mirror and had to ...
Get Quote