With the development of economy, the use of stone is more and more extensive, especially in various public places. Stone is loved by people with its elegant and elegant posture. Its use, with the change of time, will appear aging and pollution problems, which can be solved by cleaning, but sometimes it must be renovated by grinding. The following is through grinding Materials, grinding tools, so that we have a preliminary understanding of this.

1、 Classification of abrasive materials:

Abrasives are materials used for abrasive processing. Now the general classification is ordinary abrasives and superhard abrasives;

1. Ordinary abrasive

Common Abrasives mainly include (1) corundum (brown corundum, white corundum, etc.), the main chemical composition of which is Al2O3, (2) silicon carbide (black silicon carbide, green silicon carbide), and its main chemical composition is SiC (silicon carbide). Their hardness is brown corundum, Microhardness: 2000-2200 kgf / mm 2; white corundum, 2200-2300kgf / mm 2; black silicon carbide, 3100-3300 kgf / mm 2; green silicon carbide, 3200-3400 kgf / mm 2; particle size from 4 ා - micro powder w0.5 (or even finer), the order of hardness can be sorted out: green silicon carbide, black silicon carbide, processing marble Stone is white corundum (soft), black, green silicon carbide (hard); from the cost of materials, it is green silicon carbide, black silicon carbide, white corundum, around these Abrasives can be made, inorganic grinding tools, including magnesite, ceramics, etc.; organic grinding tools, including phenolic resin, unsaturated resin, and epoxy, etc. (also including abrasive cloth, sandpaper) These grinding tools constitute the grinding tools of ordinary abrasives.

2. Superhard abrasive

Diamond abrasive is a kind of superhard abrasive. Although it has a long history of machining, it has been widely used in industrial production in recent 30 years. Its microhardness is 8000-10000 kgf / mm 2. Its hardness is the highest, and it is the mechanism of micro cutting when processing materials. Therefore, it is the preferred cutting tool. In recent years, its output has been greatly increased and the industrial cost has been increased Therefore, it is widely used. Diamond grinding tools mainly include metal, resin, ceramic, etc., which are classified according to the types of binders. Metal grinding tools mainly include iron-based, copper-based and cobalt-based, which also determines the processing cost of different types of materials. When used as grinding tools, the particle size ranges from the coarsest (20 μ m) to the fine-grained (400 μ m) It is characterized by long service life but higher cost. Resin grinding tools, due to the relatively low production cost, are relatively more widely used. Nowadays, they are also used for rough grinding to polishing, which is the biggest advantage in fine-grained grinding and polishing. Ceramic diamond-like carbon grinding tools are the fastest-growing tools in recent years. In terms of processing performance, taking advantage of metal processing and avoiding short resin processing, it has a good technical advantage Cost reason, has not seen in stone renovation in use.