Diamond grinding wheels for carbide gun drills tip regrinding, wear resistant

Diamond grinding wheel is different from ordinary abrasive grinding wheel in structure. It is generally composed of diamond abrasive layer, transition layer and matrix.

The working layer, also known as diamond layer, is composed of abrasive, binder and filler. It is the working part of grinding wheel. The transition layer, also known as non diamond layer, is composed of binder, metal powder and filler. It is the part that firmly connects the diamond layer to the substrate.

The substrate is used to receive the abrasive layer and is firmly clamped on the main shaft of the grinder with a flange when in use. Steel and alloy steel powder are selected as the matrix for general metal bond products; Aluminum alloy and bakelite are selected as resin binder. It is made of aluminum, steel or bakelite and plays the role of supporting the working layer and clamping abrasives. The forming quality and precision of grinding wheel are closely related to the substrate[ 1]

Diamond grinding wheel belongs to superhard abrasive grinding wheel, which has very obvious characteristics and advantages compared with ordinary abrasive grinding wheel:

1. The hardness of diamond abrasive determines the main characteristics of diamond grinding wheel. It can grind hard materials such as cemented carbide, glass and ceramics efficiently, and the grinding tool has the longest service life.

2. Diamond has high wear resistance, less wear of grinding wheel and longer service time. In grinding, the size, shape and morphology of diamond abrasive particles change less, which is more suitable for high-precision machining and has high production efficiency. Diamond grinding wheel is a tool that can meet high-efficiency and precision machining at the same time.

3. The sharpened diamond wheel can maintain the micro edge of abrasive particles for a long time, and its good cutting performance ensures a small grinding force in the grinding process, so as to reduce the grinding power and save energy.

4. Diamond has very good thermal conductivity, which is conducive to heat evacuation, avoid workpiece burns, cracks and falling blocks, and greatly improve the quality of workpiece surface processing.

Diamond grinding wheel can be divided into resin bonded diamond grinding wheel; Ceramic bonded diamond grinding wheel; Metal bonded diamond wheel (bronze bonded diamond wheel)

According to the production process, diamond grinding wheel can be divided into: sintered diamond grinding wheel (resin bonded diamond grinding wheel); Ceramic bonded diamond grinding wheel; Metal bonded diamond wheel); Electroplated diamond grinding wheel; Brazed diamond grinding wheel.

Diamond grinding wheel can be divided into: diamond grinding wheel for diamond grinding; Diamond grinding wheel for grinding cemented carbide (diamond knife grinding wheel); Diamond grinding wheel for grinding diamond composite wafer; Centerless diamond grinding wheel for coreless grinder; Diamond grinding wheel for grinding ceramic products; Diamond grinding wheel for cutting (also known as diamond cutting blade); Diamond saw blade.

Diamond grinding wheel can be divided into: parallel grinding wheel; Cylindrical grinding wheel; Cup grinding wheel; Bowl shaped grinding wheel; Dished grinding wheel; Edging wheel; Grinding plate, etc[ 1]

Due to the characteristics and advantages of diamond abrasive, diamond grinding wheel has become the ideal preferred tool for grinding hard and brittle materials such as glass, ceramics, gemstones and stones and cemented carbide. With the progress of the times, the development of science, the needs of society, the development of new materials and the continuous development of grinding towards high quality, high precision, high efficiency and automation, the role of diamond grinding wheel is becoming more and more obvious. Metal bonded diamond grinding wheel has high holding strength, long service life and less wear, The diamond grinding wheel can give full play to its strong wear resistance and cutting ability in high-speed and ultra-high-speed high-efficiency and high-precision grinding, especially in hard, brittle and difficult to machine materials. Diamond grinding wheel is used in almost all sectors of industry, aerospace, mold manufacturing, semiconductor manufacturing, optical processing manufacturing, etc. Ceramic materials, optical materials, aeroengine turbine blades and silicon wafer products are mostly grinded with diamond grinding wheels[ 1]