Aerospace is a pioneering field leading and driving the development of new materials and new processes. Strictly speaking, aerospace is divided into two fields: "aviation" and "aerospace". The aerospace industry is dominated by spacecraft, and the aviation industry is dominated by air transportation and general aviation. The basic condition of aerospace is that the spacecraft must reach sufficient speed to get rid of the gravity of the earth or the sun, which requires the spacecraft to develop in the direction of light weight and solid structure; aviation is mainly used to transport people and cargo, and this is an energy source today. In the era of soaring prices, energy saving and consumption reduction are very important, but energy saving and consumption reduction, reducing aircraft weight are equally important, and there is also a need for safety.
  　　 To achieve the dual goals of weight reduction and safety for spacecraft and aircraft, we can start from the following aspects:
  1. Realized by using lighter weight and better performance materials, lightweight, high-strength, high-temperature-resistant and high-performance metal structural materials and their advanced material preparation and parts forming manufacturing technology. It is an advanced aircraft, high thrust-to-weight ratio aero engine, The basic and key technologies for the development and production of advanced national defense equipment such as spacecraft, satellites, carrier rockets, and ships. With the continuous improvement of the technological level of national defense equipment (for example, with the continuous improvement of aircraft flight speed, range and aero engine thrust-to-weight ratio, etc.), the requirements for the performance of high-performance metal structural materials and their material preparation and parts manufacturing technology are increasing. Higher. At the same time, the requirements for aero-engine repair are getting higher and higher, and the repair of blades and engine components is also becoming more and more important, which is related to the effectiveness and speed of the entire air force's logistics.
  　　2. It can be achieved by changing the structure of the parts and reducing the parts. For example, the rapid manufacturing process is adopted to reduce the joint parts, and the internal structure of the micro-truss structure is used to reduce the weight and reduce the failure rate. The use of RM rapid manufacturing technology can directly manufacture the final product, and is not limited by the shape and structure, and can be integrally formed, which is the best way to improve the structure of the component.
  　　3. From the design stage of the aircraft or spacecraft, the weight reduction and safety goals are fully considered, and the goals are achieved through repeated design improvements and simulation tests. This is a higher level. In the field of industrial manufacturing, usually 80% of the production cost is determined in the design stage, which is an important part of controlling product costs. This principle is also applicable in the aerospace field. Problems are discovered and solved in the design process as much as possible, which is the best way to achieve cost control and quality control. Use some rapid prototyping or rapid manufacturing technology to make models and samples with functional test performance, and simulate the final form of the product (functional form, curved surface form, etc.) to verify whether the product structure is reasonable, whether the movement is smooth, etc.; even You can make a 1:1 model and put it in the wind tunnel for intuitive aerodynamic testing.
  Main process
  　　1. Metal powder sintered final product
  　　The metal powder sintering system can directly process mold parts, prototype parts and final products, and the product performance is similar to that of forgings. Compared with the previous traditional process, metal powder sintering is not limited by the process, does not require any molds, and can quickly complete arbitrarily complex shapes, which is suitable for making workpieces with higher requirements.
  　　2. Use 3DP technology to print models or prototypes  
　　You can choose light weight and durable materials without being restricted by shape and structure. The molded sample can be used for design verification, simulation assembly, and can also be used as a prototype for manufacturing.