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China's synthetic diamond production, sales and import and export data in 2018
my country is the main producer of synthetic diamonds in the world, accounting for more than 90% of the total global diamond production. The production of synthetic diamonds in China is gradually showing a concentrated trend. As the birthplace of superhard materials in my country, its synthetic diamond production accounts for 70% of the national total. more than 70%. At present, the enterprises with the scale of production and sales in the synthetic diamond industry include Zhongnan Diamond Co., Ltd. (a subsidiary of the listed company Zhongbing Hongjian Co., Ltd.), Henan Yellow River Cyclone Co., Ltd., and Zhengzhou Huajing Diamond Co., Ltd., etc. Synthetic diamonds are high quality and inexpensive, and are comparable to natural diamonds in all aspects. Artificial large single crystal diamond can pass through
2019
06-28
Features of Grinding Wheels
When it comes to grinding wheels, many people have seen them. They are mainly used in hardware and furniture industry, automobile and shipbuilding industry, casting industry, machinery manufacturing industry, mold manufacturing and other industries. So what are its characteristics?
Discussion on Surface Processing Technology of Alumina Ceramic Substrate
Due to a series of special technical requirements in the electronic industry, electronic ceramics are very different from general engineering ceramics in terms of microstructure, chemical composition and electrical properties. For example, high mechanical strength, high temperature resistance and high humidity resistance, radiation resistance, high electrical strength and insulation resistance, medium can be changed in a wide enough range, etc. These are all labels that are inseparable from electronic ceramics.
How to dress the cylindrical grinder on the grinding wheel
Most cylindrical grinders place the part and the wheel on a level line. The highest point of the outer circle of the part and the highest point of the outer circle of the grinding wheel is called the contact point of the part/grinding wheel, and the diamond dressing tool should dress the grinding wheel as close as possible to the contact point of the part/grinding wheel. For grinding wheels for internal grinding machines, it is more important to dress the diamond dressing tool close to the highest point of the outer circle of the grinding wheel (that is, the part/wheel contact point when grinding holes). 1. Take micro-level trimming In order to reduce the trimming time, there always seems to be a temptation to choose a larger trimming depth.
At present, the new development situation of domestic diamond grinding wheels
Diamond grinding wheel is a tool for grinding hard alloys, glass, ceramics, gemstones and other hard and brittle materials. In recent years, with the rapid development of high-speed grinding technology, higher requirements have been placed on grinding wheels. Ceramic resin-bonded grinding wheels can no longer meet production needs. Metal-bonded grinding wheels have high bonding strength, good formability, and long service life. Significant characteristics and production have been widely used. Metal bond diamond grinding wheels mainly have two types of sintering and electroplating according to different manufacturing methods. In order to give full play to the role of super-hard abrasives, a new type of grinding wheel has been developed abroad by high-temperature brazing technology since the early 1990s.