How to understand the grinding wheel

In the grinding wheel dressing, and when equipped with a diamond pen model is mainly based on the relevant parameters grinder selection. To get to know wheel, primarily related to the wheel from the abrasive particle size, binder, hardness, structure, and shape and size and other parameters to start. A brief introduction as follows: First, abrasive abrasive abrasive is the main raw material manufacturing, cutting directly responsible work. The most commonly used abrasives are corundum (A), corundum (WA), black silicon carbide (C) and green silicon carbide (GC) and so on.  abrasive grinding : low hardness for processing plastic materials, such as medium and low carbon steel and low alloy steel; corundum: high hardness for processing plastic materials, such as high-carbon steel, high speed steel and hardened steel ; black SiC: low hardness for processing brittle materials such as cast iron, copper, etc.; green silicon carbide: for processing brittle polycrystalline diamond with high hardness, such as cemented carbide, precious stones, ceramics and glass. Second, the particle size refers to the size of the abrasive particles, the size of a particle numerals. GB provides two kinds of abrasive powder particle size and number. Generally speaking, use coarse  Polycrystalline diamond  coarse (size number smaller), abrasive grinding to a smaller (larger particle number); powder used for grinding and other precision machining and ultra-precision machining. Third, the binding agent
The role of binding agent bonding the abrasive having a given strength and shape of the wheel. Wheel strength, impact resistance, heat resistance and corrosion resistance, depending on the binding agent performance. The binding agents are used vitrified (Veramic), the resin binding agent (B), the rubber binding agent (R) and the metal binding agent (M) and so on. Vitrified bond: the most widely applicable to cylindrical, round, flat, centerless grinding and profile grinding wheel, etc.; resin bond: for cutting and slotted sheet wheel and high-speed grinding wheel; rubber combined agent: guide wheel for centerless grinding, polishing wheel; metal bond: for diamond grinding wheel. Fourth, the hardness of the abrasive hardness refers to the abrasive grit off under loads degree of difficulty (also known as combined degrees). The hardness of abrasive grit reflected binder consolidation as strong, abrasive hard shedding called high hardness, otherwise called low hardness.