Cutting Tool Materials in China and the history of the development
China in metal cutting has a long history. Ancient processing stone, wood, bone and other non-metallic objects is a prelude to today's metal processing. There in the Paleolithic stone choppers, to the Neolithic Age, people struggle with nature again in the production tool has been continuously improved, such as: axes, knives, stones, etc. sickle. And to be able to drill a hole in the stone. Even the hard stone inlay or bonding to bone edge to the clamping-type stone blades made of bone knife.
From this time onwards human beings, in the production practice to realize the role of a blade. Can say that a primitive form cutting process. Basically, with the cutting of the basic conditions: Tool (band edge of the stone), is processed objects (production and living supplies), cutting exercise.
Our metal cutting process, from the Bronze Age to shine, and gradually formed and developed. From the Shang to Spring and Autumn Period already have well-developed bronze smelting bronze appeared in a variety of tools, such as: bronze knives, bronze nail file, saw, etc. bronze. Oracle also has relics and records show that during this period the production of bronze tools and live instruments, in the manufacturing process have to make after cutting or grinding. The smelting technology in China than in Western Europe as early as 1000 years. Carburizing, quenching, and the invention of steel-making technology, for the manufacture of hard and sharp tools provide convenient conditions. Iron tools, indicating that the metal cutting into a new stage. Documented that as early as 3000 years ago, the Shang Dynasty Jade carving tools already have rotation, which is the predecessor of metal cutting machine tools. 70's Tomb in Hebei city is at a five-baht money has been turned on its cylindrical traces of knife even flowers, cutting vibration of corrugated clear, oval is very small. There may be five baht money through the square shaft and then clamping the wood lathe, hand holding a tool for cutting.
Eight century China will have a metal cutting lathe. The Ming Dynasty, the handicraft industry has great development, a variety of cutting methods, with the smaller division of labor. Such as: turning, milling, drilling, grinding, etc.. From the Beijing Ancient Observatory astronomical instruments can be seen on the time used and the fifties and sixties similar processing methods. It also shows there was a high precision grinding, turning, milling, drilling, etc.. The motivation is animal and water.
Later on, as government corruption and foreign invasion to China's scientific and technological stagnation, metal processing also in a backward state.
Before the liberation, the industry has been very backward, did not own the machine, tool manufacturing. Even such high-speed steel tool material, such as ordinary twist drill tool can create.
After the liberation, our machine has also been considerable development. Machine tools and tool manufacturing industry from scratch, from small to large.
7 80 years, further development of tools and materials, carbide and high speed steel specifications and varieties of the increase. Such as: coated cemented carbide, cubic boron carbide, ceramics and so on. In the Eighties NC, digital equipment also began to develop again. At that time due to electronic equipment, computer, transmission effects, there is not much room for development. With the electronic equipment, computer, transmission rate of the rapid development of digital control, digital display devices are also rapidly developing.
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