The Origin and Development of Knife Technique 15, the concept of knife work and its historical devel

Summary. In the late Warring States period (3rd century BC), copper knives were made thanks to the mastery of carburizing technology. At that time, drill bits and saws had some similarities with modern flat drills and saws.

However, the rapid development of knives was in the late 18th century, with the development of machines such as the steam engine. In 1783, René of France was the first to make a milling cutter. In 1792, Maudsley of England produced taps and dies.

The earliest documented invention of the twist drill was in 1822, but it was not produced as a commodity until 1864.

In the late Warring States period (3rd century BC), copper knives were made thanks to the mastery of carburizing technology. At that time, drill bits and saws had some similarities with modern flat drills and saws. However, the rapid development of knives was in the late 18th century, with the development of machines such as the steam engine.

In 1783, René, a Frenchman, was the first to make a milling cutter. In 1792, Maudsley of England produced taps and plates. The earliest documented invention of the twist drill was in 1822, but it was not produced as a commodity until 1864.

At that time, the tools were made of monolithic, high-carbon tool steel, and the permissible cutting speed was about 5 meters. In 1868, Muschet in England made tungsten-containing alloy tool steel. In 1898, Taylor and White in the United States invented high-speed tool steel.

In 1923, Schlertel of Germany invented cemented carbide. When using alloy tool steel, the cutting speed of the cutter is increased to about 8 meters, and when using high-speed steel, it is increased by more than two times, and when using cemented carbide, it is more than twice as high as high-speed steel, and the surface quality and dimensional accuracy of the workpiece processed by cutting are also greatly improved. Due to the high speed steel and cemented carbide are more expensive, the tool has a welded and mechanically clamped structure.

1949 During the 1950s, indexable inserts were introduced in the United States for turning tools, and soon they were used for milling cutters and other tools. In 1938, the German company Tegusa obtained a patent for the ceramic knife page 2. In 1972, the American General Electric Company produced polycrystalline synthetic diamond and polycrystalline cubic boron nitride blades.

These non-metallic tool materials allow knives to be cut at higher speeds. In 1969, the Sandvik Steel Mill in Sweden obtained a patent for the production of titanium carbide-coated carbide inserts using chemical vapor deposition. In 1972, Bangsar and Lagulan in the United States developed the physical vapor deposition method to coat the surface of tungsten carbide or high-speed steel cutting tools with a hard layer of titanium carbide or titanium nitride.

The surface coating method combines the high strength and toughness of the base material with the high hardness and wear resistance of the surface layer.