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Original Title: [Scientific and Technological Achievements Push] Shanghai Academy of Sciences Laser Coaxial Fuse — Industrial Metal 3D Printing Technology -Shanghai Academy of Sciences- Project name Laser coaxial fuse Industrial metal 3D printing technology 01 Project background Industrial metal 3D printing technology is an important direction of intelligent manufacturing and additive manufacturing in the future. At present, most of the mature metal printing equipment in the domestic and foreign markets are based on powder as consumables, but this technology is suitable for printing small and precise metal parts, and the material loss is large and the efficiency is low. The development and application of industrial metal wire 3D printing technology overcomes the above defects of powder printing, and is more suitable for the printing and manufacturing of large metal parts, with obvious advantages. 02 The unit to which the project belongs Shanghai Academy of Sciences 03 Project introduction At present, the 3D printing technologies using metal wires at home and abroad mainly include arc deposition forming, electron beam paraxial wire feeding and laser paraxial wire feeding, which are compared with our laser coaxial fuse metal 3D printing technology as shown in the following figure: Laser coaxial fuse metal 3D printing technology, its principle is to first expand the laser beam, then shape to the annular laser beam, then focus the annular laser, the metal wire passes through the center of the annular laser, when the metal wire reaches the focus of the laser, it forms a metal melt pool, when the action of wire feeding is continuous,ti6al4v eli, it is matched with the bottom. Then the molten pool will be cooled and solidified according to a certain trajectory, and a certain shape of metal parts can be printed. The schematic diagram is as follows: Expand the full text This core technology is very important and advantageous. The laser ring can make the laser focus fall on the central axis of the metal wire, and the surface of the wire is irradiated by laser beams in 360 degrees, which greatly improves the utilization rate of laser energy; The wire material and the laser are coaxial, so that the metal molten pool can be formed and solidified along any direction, that is,ti6al4v, printing can be carried out along any direction, and the problem of directional defects caused by the traditional paraxial wire feeding is solved. The advantages of laser coaxial fuse metal 3D printing technology in printing are mainly as follows: 1, can print super-large parts, suitable for industrial applications; 2, that quality and efficiency of prin metal parts are relatively high; 3, that prin material is a metal wire material, so that the cost is greatly reduced; 4. It has higher environmental protection than powder metal printing technology; Therefore, our technology and equipment are The first in China It not only fills the gap in the field of additive manufacturing in China, It also improves the ability of printing large metal parts in China. 04 Technology application 1. Print large metal parts, large metal forgings and castings, such as those used in aerospace and other fields with high technical content and accessory value. 2. Repair of large shaft parts, 3d titanium wire ,titanium filler rod, especially the remanufacturing and production process of large shaft parts in power generation equipment. If our 3D printing technology is integrated with robots, we can develop a laser coaxial fuse 3D printing robot, which is equipped with the following equipment: This equipment can not only print large parts, but also be used in large shaft repair and other processes. The application cases are as follows: 3. If our 3D printing technology is integrated with the traditional five-axis CNC machine tool, we can develop a five-axis composite CNC machine tool. The five-axis material-adding and material-reducing composite machine tool not only has a good five-axis cutting function, but also integrates the functions of five-axis metal wire 3D printing or five-axis metal powder 3D printing. The technical equipment has a wide range of applications, and can directly generate precision metal parts, realizing the complementary advantages of material-adding and material-reducing processes. The applicable cases are as follows: 05 Research results Since 2014, the R & D team has been composed of engineers and technicians with rich R & D experience in mechanical, electrical, software, process and materials. With the support of major projects of the Science and Technology Commission, the team has obtained 8 patents and 3 software copyrights, and the achievements have been transformed into high-tech achievements in Shanghai. A series of metal 3D printing equipment, such as resin, metal powder and metal wire, have been developed and applied in industrial production such as medical treatment and manufacturing. 06 Intellectual property rights applied for Serial No. Patent No./Soft Work Patent Name Application Date 1 Wire-fed 3D printer with laser as heat source 2 wire-feeding 3D printer using laser as heat source and printing method thereof Coaxial wire feeding cladding head for laser metal printing 4 Selective laser melting forming equipment 5 Leveling mechanism of 3D metal printer working platform 6 a 3D metal printer with a powder return mechanism 7 Explosion-proof wet type dust collector 8 SLM Metal 3D Printing Process Control Software 9 SLM metal powder bed 3D printing molding control software 10 Metal wire 3D printing molding control software 11 separating mechanism for bottom projection type photo-curing rapid prototyping and forming device thereof 07 Key team members Zhou Weimin Graduated from Shanghai Jiaotong University, Doctor, Researcher, Expert of "Special Government Allowance of the State Council", won the Gold Prize of Excellent Invention in the 23rd Shanghai Excellent Invention Selection Competition. Honors such as "The Third Shanghai Workers'Science and Technology Innovation Newcomer Award", "Advanced Workers of Shanghai Science and Technology System in 2013-2014", "May 4th Medal of Youth of Shanghai Science and Technology System" and "May 1st Labor Medal of Shanghai" have presided over or participated in more than ten projects, presided over the development of printers and materials, and established a 3D printing research and development service system. Si Junping Graduated from East China Jiaotong University, majoring in mechanical design and processing technology, with 20 years of experience in the development and research of 3D printing industry, he is an important backbone of the R & D team, mainly responsible for the research of mechanical structure and technology and the design of technical schemes. Participated in and successfully developed SLA principle 3D printer, SLM principle 3D printer, DLP surface light source 3D printer and WLAM principle metal 3D printer. Xia Zhangwen Doctor, female, graduated from the University of Birmingham, UK. During his doctoral studies in the UK, he was awarded by the UK Engineering and Natural Sciences Research Council and Rawls. Royce Company (Rolls-Royce), under the guidance of Professor Paul Bowen, academician of the Royal Academy of Engineering,titanium exhaust tubing, has been engaged in research in the field of metal 3D printing for many years at Rolls-Royce-University of Birmingham Technology Centre (UTC), and has participated in the "Advanced Science and Technology Research Project" led by the British Engineering and Natural Science Council and Rolls-Royce (with a total investment of 1.2 billion pounds). The application of laser additive manufacturing (3D printing) technology in the production and repair of aero-engine blisks was studied, and the macroscopic and microscopic structures and mechanical properties of nickel-based and titanium-based alloys under laser additive manufacturing were systematically and thoroughly studied. 08 Contact information Return to Sohu to see more Responsible Editor:. yunchtitanium.com

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