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In order to improve the production efficiency of aero-dynamic mechanical cutting, promote the overall manufacturing technology of aero-engines and enhance market competitiveness, in recent years, domestic aero-engine manufacturers have attached great importance to the promotion and application of advanced cutting tools, and gradually recognized the indexable Tools and high-performance, high-performance cutting tools have significant advantages over traditional tools. The metal cutting tool of the metal cutting tool of Sangaoyi is an indispensable supporting equipment for CNC machine tools. Under the driving of CNC machining technology, it has entered the development stage of “CNC toolâ€, showing “three high and one special†(ie High efficiency, high precision, high reliability and specialization). New cutting processes such as dry cutting and hard cutting, which are represented by high-speed cutting, have shown many advantages and strong vitality, and have become the main way for aero-engine manufacturing technology to improve processing efficiency and quality and reduce costs. The main contradiction in the machining of aerospace hard-to-machine materials has shifted from being able to cut machining to high efficiency and low cost. The development of the aerospace industry has put forward new high-tech requirements for precision knives . The main structural components such as blades, disc shafts and casings of advanced aero-engines are widely used. A large number of new ultra-high-strength high-temperature resistant alloys, single crystal alloys, intermetallic compounds and lightweight materials are used. High-strength composite materials, which add more difficulty to mechanical cutting, and put forward higher requirements for cutting technology. (1) Hardness. The tool material must be higher than the hardness of the workpiece material. The normal temperature of the modern tool material is usually above HRC60. (2) Strength and toughness. Higher strength can withstand greater cutting forces, and better toughness can withstand large impact loads and vibrations. (3) Wear resistance. The tool material should have good resistance to wear and is a comprehensive reflection of the strength, hardness and microstructure of the tool material. (4) Thermosetting. The tool maintains the material's hardness, strength, toughness and resistance to oxidation at elevated temperatures [3]. A variety of different tool materials can only maintain their cutting performance over a range of temperatures. Temperature range for different tool materials to work properly 
Performance and application range of common coating materials 
Current status and gaps in domestic aero-engine cutting tools In the process of machining parts, insert cutters, welded cutters and integral cutters have been widely used. In recent years, insert cutters and integral cutters have gradually become the main tool structures used in the field, welding. The range of tool applications has been gradually reduced. These tools are mainly from three sources: enterprise-made, domestic professional production plants and foreign tool suppliers. Among them, high-end tools are mainly based on the products of foreign tool manufacturers. The main problem of domestic tools is low manufacturing precision and surface treatment technology. There is a gap, the tool quality is not stable enough, and the accuracy and life of each batch of tools are sometimes inconsistent, which makes it difficult to consistently control the consistency of the machining accuracy of the parts at the production site. At present, only a few tool companies in China can enter these high-end manufacturing fields and compete with international first-line brands. The domestic brands that can be seen frequently are only a few companies such as Suzhou Arnold, Zhuzhou Diamond and Shanghai Tool Factory. According to rough statistics, in 2010 China had about 900 million yuan of high-end hard drill bit market demand, and the localization rate of high-end hard bit was only about 15%. The gap between most domestic tool companies and international first-line tool brands in terms of hard bits is mainly in design concept, manufacturing details, material selection and coating treatment. The development direction of high-precision cutting tools in China At present, the spindle speed of high-speed milling equipment equipped with aeronautical parts cutting processing has reached 24000r/min, and high-speed machining has entered the practical stage. However, the tools used in high-speed milling are mainly inserts. Carbide tools with two structures in total, and new super-hard materials (such as PCD, PCBN) are used less. This makes the tool grinding technology standard in accordance with the production characteristics of the aero-engine enterprise, strictly follows the tool grinding technology standard, tracks the tool grinding and coating quality, and timely grasps the tool grinding and coating quality. At the same time of high-precision cutting tool design, it is necessary to focus on the application of new high-efficiency tools such as diamond, CBN and coated tools in complex integral parts processing.
The aerospace industry is known as "a jewel in the crown of the industry". Due to the complex shape and structure of aerospace products, various materials and strict processing precision, it has always been one of the industries with high level of advanced technology. In recent years, there has been an increasing demand for higher strength and lighter weight of automobiles and aircraft parts. Titanium and nickel alloys in the materials used in these parts are also increasing. For example, aircraft fuselage components and compressor components of jet engines are increasingly using titanium alloy. Boeing's latest B787-8 jetliner In this case, the amount of titanium alloy used in each aircraft has increased to about 10 tons. Cutting tools that process such materials must also be able to adapt to the processing conditions and processing methods unique to difficult-to-cut materials. Our space shuttles, spaceships, space probes, and other great inventions that condense human diligence and wisdom must rely on high-precision knives to fly higher and fly farther.