1. Consolidated Abrasives Consolidation Abrasives are tools with a certain shape and certain grinding ability made of abrasive (grinding material) and bonding agent. Examples of markings for bonded abrasives: Shape size Abrasive grain size Bonding agent Hardness structure 35M/SGB/T2485 Shape code 300×50×75 Abrasive type Abrasive grain size Bonding agent Abrasive hardness Organization number Maximum working speed Abrasive tool Technical condition No. In addition to the highest working speed and the standard number of the abrasive technical conditions, the rest are characterized by a fixed abrasive. Abrasive grain size refers to the thickness of the abrasive. The abrasives of the bonded abrasives adopt the following series of standards. These seven characteristics are based on the provisions of the 1998 National Machinery Abrasives Standardization Technical Committee.
(1) Hardness: The hardness here refers to the strength of the bonding abrasive under the external force, and the bonding agent and the abrasive are combined. According to the thickness of the particle size, the blasting hardness tester and the Rockwell hardness are respectively used. Hardness is super soft (super soft 1, super soft 2), soft (soft 1, soft 2), medium soft (medium soft 1, medium soft 2), medium (medium 1, medium 2), medium hard (medium hard 1, medium hard 2, medium hard 3), hard (hard 1, hard 2), super hard (super hard 1, super hard 2) and other 7 major levels a total of 15 small.
(2) Bonding agent: The bonding agent refers to a material in which various bonding agents in the bonded abrasive tool are bonded to the abrasive. Consolidated abrasives usually use four major types of binders: ceramic, resin, rubber, and diamond. These four types of binders have the largest proportion of ceramic bond abrasives. The main materials of ceramic bond are clay, feldspar, loess, quartz and other ceramic binders according to different abrasives, different uses and different methods (casting or pressing). The resin binder is mainly a phenolic type resin, which is divided into two types of powdery resin and liquid resin, and is also classified into various resin binders according to different manufacturing methods and different uses. The rubber bonding agent is currently divided into three types: artificial styrene-butadiene rubber, sodium butyl rubber and liquid rubber. It is divided into various rubber binders according to the different methods and applications. The main materials of rhombohedral binder are composed of magnesium oxide and magnesium chloride, which are mainly used for fine-grained abrasives for fine processing. The codes of various binders are as follows: binder name binder code ceramic binder V resin binder B rubber binder R diamond bitumin binder Mg (3) organization: tissue refers to the volume occupied by the abrasive in the fixed abrasive , expressed in weight% ratio. Usually the organization does not show in the abrasive article mark, and when the formula is made at the time of manufacture, the self-control is expressed by Arabic numerals, that is, the smaller the number, the looser the tissue, that is, the less the ratio of the abrasive in the fixed abrasive tool, the larger the number The tighter the tissue, the greater the ratio of abrasive particles. Usually the organization number is from 0-12 total 13 organization numbers.
2, coated abrasive coated abrasive refers to the adhesive to adhere the abrasive to the flexible substrate, also known as flexible abrasive. Coated abrasives have nine characteristics: substrate type - substrate treatment - abrasive type - abrasive particle size - sand density - binder type - bond strength - shape - size
3. Superhard abrasives Superhard abrasives are abrasives made of diamond or cubic boron nitride superhard abrasives, and are another series of abrasive tools. Superhard abrasives have the following characteristics and markings: concentration, binder, particle size, abrasive grade, thickness of abrasive layer, pore size, total thickness, diameter, shape code, and other features and markings are in accordance with the 1998 National Abrasives Standardization Technology. The Commission prepares the provisions of each of the Chinese Machinery Industry Standards published by the Chinese Publishing House. The concentration: is substantially the same as the number of the consolidated abrasives, but should be indicated in the signs of superhard abrasives. The so-called concentration refers to the number of grams of superhard abrasive contained in the volume of the superhard abrasive per cm3, expressed in %. The concentration code is as follows: code abrasive content (g/cm3) concentration 250.2225% 500.4450% 750.6675% 1000.88100% 1501.32150% Bonding agent: refers to the type of bonding agent used in superhard abrasives. The binder code is as follows: binder binding agent code resin binder B metal binder M ceramic binder V.
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