Know "ceramic diamond wheel"

The ceramic bond diamond grinding wheel has high strength, good heat resistance, sharp cutting, high grinding efficiency, and is not easy to generate heat and clogging during the grinding process. The thermal expansion is small to control the machining accuracy. Compared with the resin bonded grinding wheel, he solved the problem of low life of the resin diamond grinding wheel, low grinding efficiency, and the variability of the grinding tool itself during grinding. The above advantages of the ceramic grinding wheel combined with the diamond grinding wheel were immediately applied to wafers (semiconductor wafers and solar wafers), diamond compacts, diamond polycrystals, diamond knives, cubic boron nitride, and tungsten steels. Carbide), new engineering structure ceramics, gemstones, crystals, rare earth materials (magnetic materials) and other high hard and brittle materials in the mechanical processing, and achieved good economic benefits.

Overview

With a good ratio of ceramic binder to bond the abrasive particles, after the compaction, drying, roasting and trimming, with a lot of pores, grinding abrasives for cutting. The abrasive grain has a sharp corner exposed on the surface portion as a cutting edge. Divided into: ceramic grinding wheel (silicon carbide, brown corundum, white corundum, etc.) and ceramic superhard grinding wheel (ceramic bond diamond grinding wheel and ceramic bond CBN grinding wheel) two categories.

advantage

1, high grinding efficiency;

2, has a very high wear resistance (abrasive wheel high wear, low wear particles, especially when grinding a very hard and very brittle workpiece is most obvious);

3, grinding force is small, grinding temperature is low;

4, the grinding of the workpiece with high precision, good surface quality, good shape retention of the workpiece.

Therefore, the ceramic bond diamond grinding wheels are increasingly used in the grinding of special materials such as diamonds, industrial ceramics, diamond composites, diamond polycrystals, diamond knives, cubic boron nitride, and hard alloys. The obvious advantages have a good prospect in the development of diamond abrasive tools. It is considered as a high-performance, high-efficiency, high-precision, low-grinding cost, low-environmentally-polluting high-performance abrasive tool, with more and more extensive applications. It is a hot topic of research and development of grinding tools in various countries in the world.

Attributes

The characteristics of the grinding wheel are mainly determined by factors such as abrasive, particle size, binder, hardness, structure, and shape and size. Hardness and texture are generally ignored in superhard wheels.

Abrasive

Abrasives are the main raw material for the manufacture of grinding wheels and are directly responsible for the cutting work. .

Diamond: Suitable for processing high-hard metal and non-metal hard-brittle materials that are difficult to process with ordinary material grinding wheels. Such as cemented carbide, optical glass, ceramics, stone, semiconductor materials and so on.

granularity

Particle size refers to the size of the abrasive particles, the size of which is indicated by the size number.

The national standard specifies abrasive and micropowder particle sizes.

In general, coarser grinding uses coarser abrasives (smaller grain size), finer grinding uses finer abrasives (larger grain size), and fine powders are used in grinding and other precision machining and ultra-precision machining. Ceramic diamond wheel size range is generally w1.5 ~ 80/100

Binding agent

The purpose of the binder is to bond the abrasive to a grinding wheel with a certain strength and shape. The strength, impact resistance, heat resistance and corrosion resistance of the grinding wheel mainly depend on the properties of the binder.

Commonly used binders include ceramic binders (V), resin binders (B), rubber binders (R), and metal binders (M).

Ceramic binder: the most widely used, suitable for the round, inner circle, flat, centerless grinding and forming grinding wheel;

Resin binder: Suitable for cutting and grooving sheet grinding wheels and high-speed grinding wheels;

Rubber binder: suitable for centerless grinding guide wheel and polishing wheel;

Metal bonding agent: suitable for diamond grinding wheels.