To our abrasives and international synchronization

This stage presents a new feature that followed the industry carried out by increasing the hardness of processed data, the original can not be satisfied with simple Abrasives need to carry out, so we will start to seek higher hardness abrasive material to do , has found a natural corundum, topaz, natural diamond and other information we put these natural data broken and clay mixed, calcined abrasive has a certain shape, in  order grinding disc  to be processed.
It can be said, began to use natural abrasives higher hardness is characteristic throughout this period. However, the value of all natural abrasives are not set, and the limited number of inconsistent quality, all of this is difficult to maintain a stable and rapid Mengjin industrial limitations become increasingly unsuited.
(Three) the third stage (the late nineteenth century to the early twentieth century)
The primary characteristic of this cutting and grinding disc  period is to present and apply artificial abrasive.
Since then, a large number of industries had started to compare price and quality and unmatched stability, output has steadily added artificial abrasive grinding stuff, and then push the data processed by grinding quick growth, of course, from the other hand to carry out grinding also promotes agility carry abrasives. This stage can be divided into the following periods:
, 1900 -1920 years:
During this period, showing the outside of everything except centerless grinder grinder, which promotes automotive, military, industrial electrodes greatly carried out.
2,1920 -1949 years ago:
In the 1920s the future, grinding machinery began to carry out by the hydraulic mechanical transmission, the grinding process is still done in partial automation, during this period, centerless grinding portraying success, began to put into use, this period is a very important representation of the discussion is about the grinding process, the experience from the beginning into the theoretical analysis approach. That the theory of the beginning of the discussion on the grinding.
3,1950 to 1980 years ago:
Internationally, the United Kingdom, France, the DC wheel  United States, Germany, Italy and the former Soviet Union carried out throughout the artificial abrasive seminars and conducted industrial production, and thus abrasive and grinding tools have made great progress over the previous period, the industrial boom State machine grinder proportion reached 10% of total, and is constantly increasing.
In China, an important group of influential projects put into operation, such as the second Grinding Wheel, Grinding Wheel third and fourth Grinding Wheel, Grinding Wheel Fifth, Sixth Grinding Wheel, Grinding Wheel VII put into operation. Said clarity of career abrasives are constantly launching grow.
4, before and after the reform and opening up:
To our abrasives and international synchronization, in the following aspects in the discussion or improve the precision grinding progress ①, ② progressive grinding degree of automation, ③ high-speed grinding, ④ high accuracy and high-quality finish, ⑤ strong grinding, ⑥ wide and multi-wheel grinding wheel, ⑦ progressive grinding machining production rate, ⑧ trial conducted special grinding or molding grinding, ⑨ superhard abrasives. Hard data such as artificial diamond and cubic boron nitride is currently being called the world's most hard substances, Mohs hardness of 10.