First, the grinding

Using grinding tools and abrasives, research from the work to a very thin surface layer of the finishing method, called grinding.

Grinding, dense disk in the middle of the workpiece and the research into the diamond or other abrasives, the subject silicon carbide extrusion, the workpiece surface rupture, when the grinding disc and the workpiece relative motion, due to the irregular and its abrasive grinding plate and the workpiece rolling surface of the workpiece and the grinding surface of the pieces of broken fragments created by the "push away", so to repeat, and gradually make the surface as smooth and sophisticated plane. Abrasive grinding is used according to the working fluid, can be divided into wet grinding and dry grinding.

Wet grinding method of processing capacity, Yin is a rough, wet ground by the Lipi-like glossy dark.

Dry grinding method of processing a small amount, usually finishing in grinding the mirror by the light.

Second, the abrasive

Abrasive and abrasive is composed of a mixture of water or oil. Hardness of the workpiece and the machining allowance, can choose different size of abrasive.

Sources can be divided into families according to their grinding natural and synthetic abrasives abrasives. Natural abrasives include diamond, corundum, garnet, and so on. Artificial abrasives are synthetic diamond, synthetic corundum, silicon carbide, boron magnetized.

Department of diamond carbon (C) of the crystal, specific gravity between 3.4-3.6, hardness more than 10,000, is the hardest. Since diamond is expensive, so in the grinding process, it is often used as micron size diamond powder grinding paste prepared on the astringent quality materials such as alloy or ceramic workpiece lapping and polishing.

Department of alumina corundum (Al2O3) crystals, the proportion of natural corundum in the 3.9-400 between the proportion of 3.2-4.0 between artificial corundum, alumina has great toughness, Vickers hardness of about 2000 or more.

Silicon carbide (SlC) Department of plate-like crystal, hardness about 3000, due to the presence of impurities often with a variety of colors. Common for the green and black. Black silicon carbide content of about 98%, about 98.5% of green silicon carbide toughness of small, green silicon carbide is more brittle than some of the black, suitable for processing a variety of brittle materials.

Boron carbide (B4C) the proportion of about 2.5, close to the hardness over silicon carbide and diamond. High hardness of the workpiece for grinding.

Diamond polishing paste is a mixture of synthetic diamond powder as raw materials relative to the other preparation. Paste is a water soluble material, with good lubricity. Can be used to dilute with water and glycerol. Produced by various manufacturers grinding paste, according to different specifications, all accompanied by a different color, easy to use identification.

Third, the hand-grinding

Hand grinding is generally flat on the ground. Plate is square, measuring 300 × 300mm or 350 × 350mm, materials, cast iron, precision grade shall be not less than - "level. A group of three flat-panel general, the use must be regularly checked to ensure accuracy. Even when the workpiece using abrasive grinding almost plate surface, repair, three plates each corresponding to the calibration of the study, almost plate just keep the precision of grinding to get better quality.

IV, grinders

During the production and maintenance of mechanical seals, although larger case to use the grinding machine, grinding machine is a special equipment for grinding plane, according to their structure type sub-machine grinding machine and grinding machine electromagnetic vibration. In the mechanical grinding machine, grinding machine has single, double-sided grinding machine. Some mill higher degree of automation, but also the work of automatic compression and automatic measurement of the thickness of a high grinding efficiency.