Abrasive definition, classification and code

1 Definition of abrasive 1 (1-1)

 

The concept of abrasive has different meanings at different stages with the development of science and technology. The "Encyclopedic Dictionary of Science and Technology" published in 1982 explains that abrasives are extremely hard materials used to grind or grind other materials. Abrasives can be used alone, or they can be prepared into grinding wheels or coated on paper or cloth for use. The "Mechanical Manufacturing Technology Dictionary" compiled by the International Production Engineering Research Association in 1992 defines abrasives as: "Abrasives are natural or artificial materials with granular shape and cutting ability." The concept of abrasives defined in Standard Abrasives and Grinding Tools for Mechanical Engineering published by China Standards Press in May 2006 is that abrasives are materials used in grinding, grinding and polishing; abrasives are granular materials made of specific particle sizes by artificial methods and used to manufacture grinding, polishing and grinding tools for removing excess material; coarse abrasives are abrasives with a particle size of 4 to 220; fine particles are ordinary abrasives not coarser than 240 particle sizes or superhard abrasives finer than 36μm/54μm; abrasives are abrasives that are directly used for grinding or polishing in a free state.

Abrasives have become important materials used in manufacturing, defense industry, and modern high-tech products. Abrasives can be made into various types or shapes of grinding tools or grinding wheels. Abrasives are the main materials that enable grinding tools to perform grinding processes, and abrasives can be used directly to grind or polish workpieces.

 

2 Abrasive classification and code 1 (1-3)

 

Abrasives are divided into two categories: ordinary abrasives and superhard abrasives. These two categories are further divided into natural abrasives and artificial abrasives.

--Classification of abrasives--

Natural common abrasives were widely used in ancient times. Since natural common abrasives have low hardness, uneven structure, and contain many impurities, their grinding performance is poor and they are rarely used now. Artificial abrasives are mainly used in modern industry. The varieties and codes of artificial common abrasives used in my country have been included in the national standards.

Natural diamond (also known as diamond) is a rare mineral. Gem-grade diamond is crystal clear, showing a unique luster and shining. It has been used to make beautiful decorations since ancient times. In modern times, the development of the special properties and use value of diamond has turned diamond from a decoration to a treasure of modern industry and science and technology. In 1954, artificial diamond was introduced, and in 1957, cubic boron nitride was successfully developed, and super-hard abrasives have developed rapidly.