What are the applicable ranges of angular grinding discs?

Angular grinding disc is a tool for grinding, grinding and polishing. Most of the abrasives are artificial abrasives made of abrasives and binders, but also natural abrasives made directly from natural minerals and rocks.

Angular grinding disc is a tool for grinding, grinding and polishing. Most of the abrasives are artificial abrasives made of abrasives and binders, but also natural abrasives made directly from natural minerals and rocks. Abrasives are widely used not only in machinery manufacturing and other metal processing industries, but also in food processing, paper industry, ceramics, glass, stone, plastics, rubber, wood and other non-metallic materials processing.

In the process of using abrasives, when the abrasives are blunt, the abrasives fall off partly or completely from the abrasives due to the fragmentation of the abrasives themselves or the fracture of the binder, while the abrasives on the working face of the abrasives constantly appear new cutting edges, or constantly expose new sharp abrasives, so that the abrasives can maintain cutting performance for a certain period of time.

Abrasives can be divided into natural abrasives and artificial abrasives according to their source of raw materials. Oilstone is the only natural abrasive tool commonly used in machinery industry. Artificial Abrasives can be divided into five categories according to their basic shape and structural characteristics: grinding wheel, grinding head, oil stone, sand tile (above collectively referred to as consolidated abrasives) and coated abrasives.

Ordinary abrasive consolidation abrasive tool is a kind of abrasive tool which consolidates ordinary abrasive into a certain shape and has a certain strength by binder. Generally, it consists of abrasive, binder and pore. These three parts are often referred to as the three elements of consolidation abrasive tools.

According to the different abrasives used, corner Abrasives can be divided into ordinary abrasive consolidation abrasives and superhard abrasive consolidation abrasives. The former is made of ordinary abrasives such as corundum and silicon carbide, while 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. There are two kinds of materials, inorganic and organic. Inorganic binders include ceramics, magnesite and sodium silicate, and organic resins, rubber and shellac.  Ceramic, resin and rubber binders are the most commonly used.

The hardness of abrasives mainly depends on the amount of binder added and the density of abrasives. Abrasives easy to fall off means that the hardness of abrasives is low; conversely, it means that the hardness is high. Hardness is generally divided into seven grades: super-soft, soft, medium-soft, medium-hard, hard and super-hard. The commonly used methods for measuring the hardness of abrasive tools are hand cone method, mechanical cone method, Rockwell hardness tester method and sandblasting hardness tester method.

The hardness of the abrasive tool corresponds to its dynamic elastic modulus, which is helpful for the determination of the dynamic elastic modulus of the abrasive tool by audio method to express the hardness of the abrasive tool. In grinding process, if the material hardness of the grinded workpiece is high, the abrasive tool with low hardness is generally used; on the contrary, the abrasive tool with high hardness is chosen.

The structure of angular grinding disc can be roughly divided into three types: compact, medium and loose. Each category can be subdivided into several numbers, etc., using the organization number to distinguish. The larger the size of the abrasive, the smaller the volume percentage of abrasive in the abrasive, the wider the gap between the abrasive particles, indicating the looser the structure. Conversely, the smaller the organization number, the tighter the organization. The organization of abrasives is controlled only according to the formula of abrasives, and is not usually measured. The abrasives with tighter structure are not easy to fall off, which is beneficial to maintaining the geometric shape of the abrasives. The grinding tool with looser structure is not easy to passivate in use and has less heat during grinding process, which can reduce the thermal deformation and burn of the workpiece. For the renovation of concrete floors, such as industrial floors, warehouses, parking lots or various aggregate hardener floors, especially for the current popular liquid hardener floors, various hand grinders or renovators can be used flexibly according to needs and habits, and DS grinding discs of different sizes can be selected for rough grinding, fine grinding and polishing.