According to the evaluation and purchase garnet color, transparency, granularity as the basis. Gem garnet CBN abrasive grit standard requirements: transparency, bright colors, particle size greater than 5 mm. In the international gemstone market, pristine, bright colors, high value garnet crystal clear. Emerald green chrome vanadium aluminum garnet highest value,alluvial garnet gbrasives quality can be compared with those emerald. Red, orange and red garnet is also very valuable. Purple teeth Ukraine is now one of the more common middle and low gems. Gaudy colors, pure, transparent varieties are purple teeth black share. Its refractive index is high, strong luster, color beautiful and diverse, is a favorite gem varieties. Many countries of the purple teeth black as "January birthstone", a symbol of fidelity, love and chastity. Westerners think purple teeth black with a life-saving magic; in the Middle East, White fused aluminum oxide purple teeth black was elected to do the royal family keepsake. Geological Museum of China, the possession of an orange-red spessartite Shida Jing body, weighing 1397 karats, produced in Xinjiang. U.S. National Museum of Natural History in the collection of the world's best a cinnamon brown yellow transparent stone (iron, calcium and aluminum garnet), is a picture of Christ carved delicate, heavy 61.5 kt, priceless.
Abrasive is a sharp, hard material, relatively soft material to the grinding surface. There are natural and artificial abrasive abrasive abrasive two categories. Classification according to the hardness of range of abrasives, from softer household detergents, abrasive gem diamond to the hardest material
2014年8月27日星期三
2014年8月20日星期三
waterjet abrasives Scope
The abrasive is sharp, hard material, relatively soft material to the grinding surface. There are natural and artificial abrasive abrasive abrasive two categories. Classification according to the hardness of superhard abrasive abrasive and general extravagant two categories. A wide range of abrasives, from softer household detergents,alluvial garnet gbrasives abrasive stones hardest material to diamond. Each product is a precision abrasive essential materials. Many natural abrasives, has been replaced by artificial abrasive. In addition to diamonds, the natural abrasive properties are not very stable, but still has its value. Diamond is the hardest abrasive, origin in South Africa, accounting for 95% of world production, and the rest of Brazil, Australia, Guyana and Venezuela. Industries ranging from white to black diamond, can be made after the crushing wheel, abrasive, polishing wheels and grinding powder.
This technology can be designed for white aluminum oxide general-purpose devices such as two-axis plane cutting machine, the machine adopts microcomputer control, adapt to a variety of sheet metal forming cutting arbitrary curves, such as non-metallic materials sheet: marble, granite, glass, ceramics and other works; sheet metal materials: titanium, stainless steel, ordinary steel, etc.; composite sheet: carbon fiber / epoxy, fiberglass / epoxy and so on.
This technology can be designed for white aluminum oxide general-purpose devices such as two-axis plane cutting machine, the machine adopts microcomputer control, adapt to a variety of sheet metal forming cutting arbitrary curves, such as non-metallic materials sheet: marble, granite, glass, ceramics and other works; sheet metal materials: titanium, stainless steel, ordinary steel, etc.; composite sheet: carbon fiber / epoxy, fiberglass / epoxy and so on.
2014年8月16日星期六
alluvial garnet gbrasives, glass beads
Chemical formula: 3Al2O3 · 2SiO2. Colorless. Red or blue with rose-containing impurities. Orthorhombic, a columnar or needle-like crystals. Melting temperature of about 1910 ℃. alluvial garnet gbrasives Generated calcined clay, high alumina raw material (such as kyanite, andalusite, sillimanite) and ceramics. Is the main component of clay brick, high alumina brick and porcelain, Moore produced in Scotland Island and other places. Can also be fused legal system. See kyanite and andalusite.
Refractoriness: 1800 ° C while still stable, cubic boron nitride 1810 ° C and a liquid phase decomposition of corundum mullite
Mullite is a high-quality refractory materials, it has expanded uniform, excellent thermal shock resistance, high load softening point, a small high-temperature creep, hardness, chemical resistance and good features, mainly high purity electricity fused mullite, green silicon carbide fused mullite general, all-natural mullite sintered bauxite concentrate and the light burned mullite.
2014年8月15日星期五
alluvial garnet gbrasives Nepalese cashmere hammer
Precautions during installation when installing first wheel on safety and quality testing, method, Nepalese cashmere hammer (you can also use a pen) tapping the side of the wheel,alluvial garnet gbrasives then no problem crisp sound positioning problem grinders installed in any position, is the question we must first consider the installation process, only selected reasonable and appropriate location, we can perform other work. Grinder prohibit installed near the equipment and facing the operator or the place has often been in the past, generally the larger wheel shop should set up a dedicated room. If you really can not because of restrictions set up a dedicated factory terrain wheel room, black silicon carbide hould be installed in the front of the wheel height of not less than 1.8m protective bumpers and tailgate requires strong and effective. Unbalanced balance problems mainly by grinding wheel manufacturing and installation is not accurate, so that the wheel does not coincide with the center of gravity and rotary caused.
Harm imbalance mainly manifested in two aspects, one at high speed when the wheel rotates, causing vibration, could easily lead to the workpiece surface polygonal oscillation marks; on the other hand, unbalanced accelerated vibration spindle and bearing wear, serious when will cause wheel breakage, or even cause an accident. Therefore, the request is greater than or equal to a large installed straight on the card after hours should be static balance wheel when dressing or discovered after shaping the imbalance in the work should be repeated static equilibrium 200mm sand office. Matching matching problem mainly refers to the chuck and the wheel mounting support problems. According to standards, wheel chuck diameter not less than the diameter of installed building sand-third, and the corresponding provisions of the grinding wheel wear to a larger diameter than the diameter of 10mm chuck should be replaced with a new wheel. sandblasting material Thus there is a matching problem chuck and grinding wheel, otherwise it will happen, "big horse car" wasteful equipment and materials; "small horse cart" do not meet the safety requirements, could easily lead to accidents. Therefore, a reasonable match chuck and grinding wheel, one hand can save equipment, cut about materials; hand and meet the requirements for safe operation. Further, between the wheel and the installation of a larger diameter than the chuck should chuck diameter 2mm, 1mm ~ 2mm thick cushion. Protection issues grinder shield is the most important protective device, its role is: When the wheel for some reason destruction at work, can effectively cover the wheel debris, ensure the safety of personnel.
2014年8月12日星期二
CBN abrasive grit Fused corundum brick
Fused corundum brick [fused castiong alumina bricks] fused alumina bricks are melted in electric arc furnaces in the aluminum casting to a specific model of a certain shape by the annealing, and then processed by diamond abrasive to give the desired products. The crystalline form of aluminum products CBN abrasive grit according to which the number of how many different and is divided into three kinds, the first one is mainly α-Al2O3 crystal phase, called α corundum brick; second is α-Al2O3 and β-Al2O3 crystalline phase mainly basic content is 1:1, α-phase content is slightly higher, called α, β corundum brick; third crystalline phase to β-Al2O3-based, called β corundum bricks.
The product α-Al2O3 crystal phase and the β-Al2O3 based, the content of about 50%, the product crystallized dense below 1350 degrees, the corrosion resistance of the glass is excellent fused zirconia mullite in after it is widely used in glass tank furnace, and the work site, the site is usually chute, lip brick, tile and other gates. Internationally fused alumina brick with Japan's Toshiba to do the most good
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