Understanding: "Angle Grinding"

Angle grinder is a kind of resin abrasive tool made of special fiber fabric as reinforcement material. Angle grinding pieces have high tensile strength, impact resistance and bending strength. Angle grinding pieces are widely used for grinding and derusting of various metal and non-metal materials, which are rapid and economical.

Using resin as binder and glass fiber grid as reinforcement high-speed grinding tool, it has high toughness impact strength, high grinding rate, easy to use and safe. The maximum operating speed is up to 80m/s. It can be mounted on various kinds of grinding machines for free grinding. It is easy to use and widely used in automobiles, ships, machine manufacturing, metallurgy and chemical construction. Clean welding, solder joints, grinding castings, burrs, burrs, and repair metal surface defects. For ordinary steel, steel, angle steel, stainless steel, sheet steel, stone, concrete load cutting. Angle grinders are tools for grinding, grinding and polishing. Most of the abrasives are artificial abrasives made of abrasives and binders, and are also natural abrasives that are directly processed from natural mineral rock. In addition to being widely used in machinery manufacturing and other metal processing industries, abrasive tools are also used in grain processing, paper industry, and non-metallic materials such as ceramics, glass, stone, plastic, rubber, and wood.

In the course of using the abrasive tool, when the abrasive particles are blunt, the abrasive particles partially or completely fall off from the abrasive tool due to the part of the abrasive particles being broken or the bonding agent is broken, and the abrasive material on the working surface of the abrasive tool is constantly undergoing new cutting. Edge, or constantly exposed new sharp abrasive particles, so that grinding tools can maintain cutting performance in a certain period of time.

Abrasives are classified according to their source of raw materials, including natural abrasives and artificial abrasives. The only natural abrasive used in the machinery industry is oil stone. Artificial abrasives are distinguished by their basic shape and structural characteristics. They include grinding wheels, grinding heads, whetstones, sand tiles (collectively referred to as bonded abrasives) and coated abrasives.

Ordinary abrasive bonded abrasive tool is a grinding tool with a certain strength, which is formed by bonding a common abrasive to a certain shape with a binder. Generally composed of abrasives, binders and pores, these three parts are often referred to as the three elements of bonded abrasives.

According to the different abrasives used, the angle grinding plate fixation abrasive tools can be divided into ordinary abrasive bonded abrasive tools and superhard abrasive bonded abrasive tools. The former uses ordinary abrasives such as corundum and silicon carbide, and the latter is made of superhard abrasives such as diamond and cubic boron nitride.

Abrasives play a cutting role in abrasives. Binders are materials that consolidate loose abrasives into abrasives, both inorganic and organic. Inorganic binders include ceramics, magnesite and sodium silicate, organic resins, rubber and shellac. The most common of these are ceramic, resin, and rubber binders.

The hardness of abrasives depends mainly on the amount of binder added and the density of abrasives. Abrasives tend to fall off and indicate that the hardness of the abrasives is low; otherwise, it indicates high hardness. Hardness grades are generally divided into seven grades: supersoft, soft, medium soft, medium, medium hard, hard, and superhard. From these grades, several small grades can be further subdivided. The method of determining the hardness of the abrasive tool, the hand-cone method, the mechanical taper method, the Rockwell hardness tester, and the sandblast hardness tester method are commonly used.

The hardness of the abrasive tool has a corresponding relationship with its dynamic elastic modulus, which is favorable for measuring the dynamic hardness modulus of the abrasive tool by the audio method to represent the hardness of the abrasive tool. In the grinding process, if the material hardness of the workpiece being ground is high, generally the abrasive tool with low hardness is selected; otherwise, the tool with high hardness is used.

Angle grinding plate is divided into three groups: tight, medium and loose. Each category can be further subdivided, etc., using the organization number to distinguish. The larger the abrasive organization number, the smaller the volume percentage of the abrasive in the grinding tool, and the wider the gap between the abrasive particles, the looser the organization. On the contrary, the smaller the organization number, the tighter the organization. The organization of the abrasive tool is controlled by the abrasive tool formulation only at the time of manufacture and is generally not measured. Abrasive abrasive grains of tight organization are not easy to fall off, which is conducive to maintaining the geometry of the abrasive tool. The relatively loose abrasives are not easily passivated during use and generate less heat during the grinding process, which can reduce the heat distortion and burn of the workpiece.