The splitter blade is an important machining blade in cutting manufacture

　　Cutting tools can be divided into five categories according to the form of workpiece processing surface. The cutting tools used to cut wood are called woodworking tools. These nonmetallic circular blade materials allow the splitter blade to cut at higher speeds. In 1898, Taylor and the United States. White invented high-speed steel. The first recorded invention of the twist diamond was in 1822, but it was not produced as a commercial product until 1864. China as early as in the 20th century, as early as 28 BC, has been the brass cone and copper cone, drill, knife and other copper tools.

　　. Drills and saws at that time had some similarities with modern flat drills and saws.

　　At that time, the splitter blade was made of integral high carbon tool steel with a permissible cutting speed of about 5 m/min. In 1923, schleitel of Germany invented cemented carbide. The word "cutter" is generally understood as the metal cutting stripper blade, because the stripper blade used in mechanical manufacturing is primarily used for cutting metal materials. 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, so that the composite material has better cutting performance. In 1792, the British made taps and die.

　　However, the rapid development of splitter blades came with the development of steam engines and other machines in the late 18th century.

　　When using alloy tool steel, cutting speed of splitter blade is improved to about 8 m/min, when using high speed steel, it is improved more than twice, and when using hard alloy, it is improved more than twice than using high speed steel, the surface quality and dimensional precision of the workpiece are also improved greatly.

　　Because of the high cost of high speed steel and hard alloy, the splitter blade is welded and mechanically clamped. In 1972, ge produced polycrystalline synthetic diamonds and polycrystalline cubic boron nitride blades. In 1783, Rene of France made the first milling cutters.

　　The splitter blade is a tool used for cutting, also called circular cutting blade. In 1949-1950, the United States began to use indexable blades in turning tools, and soon they were used in milling cutters and other cutters. In 1972, bangsha and lagulam of the United States developed the physical vapor deposition method to coat the surface of carbide or high speed steel slitting machine blade with titanium carbide or titanium nitride hard layer. In 1868, musher made tungsten alloy tool steel. Processing of various surface tools, including turning tools, planer, milling cutter, external surface broach and file; Hole processing tools, including drill, reamer, boring, reamer and internal surface broach; Thread processing tools, including taps, die, automatic thread cutting head, thread turning tool and thread milling cutter; Gear processing tools, including hob, gear shaver, gear shaver, bevel gear processing tools; Cutting tools, including insert tooth circular saw blade, band saw, bow saw, cutting tool and saw blade milling cutter, etc. In the late warring states period (3rd century BC), copper cutting tools were made by grasping the technology of carburizing.

　　The development of splitter blade plays an important role in the history of human improvement.