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Cardan axle shaft for truck: advantages of laser 3D printing technology in aerospace manufacturing industry

Views: 0     Author: Site Editor     Publish Time: 2022-11-16      Origin: Site

Laser additive manufacturing (laser 3D printing) is a systematic and comprehensive technology that integrates laser, computer software, materials, machinery, control and other multidisciplinary knowledge. Using discrete means to "pile up" forming principle point by point or layer by layer, according to the three-dimensional CAD model of products, quickly "print" product parts, completely changed the traditional metal parts, especially the processing mode of high performance, difficult to process, complex configuration and other metal parts.

Cardan axle shaft for truck: advantages of laser 3D printing technology

The main application of laser additive manufacturing technology in the field of aerospace is the rapid manufacturing of structural and functional metal parts. So far, the relatively mature processes include laser melting deposition technology and laser selective melting technology.

Depending on its own technical characteristics, laser additive manufacturing technology has shown incomparable advantages in aerospace industry manufacturing. Countries such as the United States and the European Union have begun to vigorously develop additive manufacturing in order to apply it to the aerospace field. In August 2012, the Additive Manufacturing Innovation Institute was established, bringing together 14 universities, more than 40 corporations, 11 nonprofit organizations, and professional associations in Pennsylvania, Ohio, and Virginia. The European Space Agency (ESA) announced its Marvel project in October 2013, which will bring together 28 organisations to develop new metal parts that are lighter, stronger and cheaper than conventional ones, with the aim of "bringing additive manufacturing into the metal age". In addition, Boeing, Lockheed Martin, GE Aero Engines, Sandia National Laboratories and Los Alomos National Laboratory, European EADS, British Rolls-Royce, French SAFRAN, Italian AVIO, Canadian National Research Institute, Australian National Scientific Research Center and other large companies and national research institutions have carried out a lot of research work on the application of additive manufacturing in the aerospace field.

Chinese laser additive manufacturing of metal materials is at the advanced level in the world, but there is still a little gap between China and the developed countries such as Europe and America. Teams from Northwestern Polytechnical University, Beijing University of Aeronautics and Astronautics, Nanjing University of Aeronautics and Astronautics, etc. have carried out research on laser additive manufacturing process of titanium alloy, superalloy, ultra-high strength steel and gradient materials in response to the urgent demand for high-performance, lightweight, integrated and precision forming technology of structural parts in aerospace and other high-tech fields. The key technologies of light weight, high stiffness, high strength, integral forming, stress deformation and metallurgical quality making, and optimization of microstructure and performance of formed parts are broken through.

Laser additive manufacturing repair bladebuy axle shaft with double u joint - xinsanming

With the development of laser additive manufacturing technology, it is playing an increasingly important role in the field of aerospace manufacturing, but there is still a long way to go to realize the real large-scale industrial application. The particularity of manufacturing process in aerospace industry puts forward higher requirements for laser additive manufacturing.

(1) More in-depth mechanism research. The physical, chemical, mechanical and material metallurgy phenomena of laser metal additive manufacturing are extremely complex, and the technology is very difficult. There is a lack of in-depth understanding and research on the key fundamental issues of laser additive manufacturing of metal parts, such as the formation law of internal microstructure, the formation mechanism of internal defects, the evolution law of internal stress and the deformation and cracking behavior.

(2) The optimized process ensures higher processing quality. The high process requirement of aerospace industry poses greater challenge to laser additive manufacturing technology. It is necessary to expand the application scope of laser additive technology by expanding the material system, breaking through the size of parts, developing real-time monitoring feedback system, optimizing equipment and process parameters to improve the machining accuracy and surface quality.

(3) The establishment of new means of quality inspection and new processing standards. Because the shape of the laser additive forming parts is often very complex, and at the time of manufacturing is a one-piece manufacturing. Therefore, it is very difficult to use the traditional method to detect and test without affecting the parts. The new detection means will inevitably lead to the change of the processing standard.

(4) More optimized software and database support. The forming path planning, support addition and database parameter support of additive manufacturing have decisive influence on machining quality and forming efficiency.

(5) The organic combination of laser additive manufacturing technology and traditional processing technology. Combining the advantages of additive manufacturing technology to form complex fine structures and direct near-net forming with the advantages of traditional manufacturing technology such as high efficiency, low cost, high precision and excellent surface quality, the optimal manufacturing strategy is formed.

Laser additive manufacturing is a new multidisciplinary technology involving laser, machinery, numerical control, materials and so on, and has a short development time. Compared with the traditional manufacturing technologies such as casting, forging, welding, powder metallurgy and machining, its technology maturity still lags significantly, and it needs to carry out systematic and in-depth basic research and engineering research. In addition, the collaboration of multiple teams is also the cornerstone of the further development of additive manufacturing, so that additive manufacturing can play a greater role in the aviation sector.

High speed, high mobility, long endurance, safe, efficient and low-cost operation and other harsh service conditions put forward higher requirements for aircraft structural design, materials and manufacturing. Additive manufacturing makes it possible for aircraft to be lightweight, integrated, long life, high reliability, structure-function integration and low-cost operation, and the aerospace field gives additive manufacturing wings to take off!


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  : The Innovation Industrial Park, No.36, Jingwei Road ,Xi'an Economic and Technological Development Zone,Xi'an City,Shaanxi Province,China
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