Grinding is an ancient technique that humans have known since ancient times. In the Paleolithic era, this technique was used to grind stone tools. Later, with the use of metal appliances, the development of grinding technology was promoted. However, the design of a veritable grinding machine is still a modern thing. Even in the early 19th century, people still rotated the natural grinding stone to make it contact with the processed object for grinding.
5.1 The first grinding machine (1864) In 1864, the United States made the world's first grinding machine, which was equipped with a grinding wheel on the lathe tool holder of the lathe, and it was equipped with a device for automatic transmission. After 12 years, Brown in the United States invented a universal grinder close to modern grinding machines.
5.2 Artificial grindstones – the birth of grinding wheels (1892) The demand for synthetic grindstones has also arisen. How to develop a grindstone that is more wear-resistant than natural grindstone? In 1892, American Acheson successfully produced silicon carbide made of coke and sand, which is a kind of artificial grindstone now known as C abrasive; Two years later, the A-abrasive with alumina as the main component was successfully trial-produced, so that the grinder was more widely used.
In the future, due to the further improvement of the bearing and guide rail parts, the precision of the grinding machine is getting higher and higher, and the direction of specialization has developed, and the internal grinding machine and flat have appeared.
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