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3D printing of arc fuse metal has great potential

wallpapers News 2021-01-18
Since 2020, the application of metal 3D printing technologies such as laser powder spreading (SLM), laser powder feeding, arc fuse, etc. have accelerated in the military, aerospace, and aviation fields. In particular, the demand in related fields in China has exploded. Foreign arms contractors and rocket manufacturers have already adopted it.
 
The following introduces the arc fuse metal 3D printing technology, which can realize the manufacture of super-large high-performance metal 3D printing parts and the speed and efficiency are very high.
 
WAAM arc fuse 3D printing technology (WireArcAdditiveManufacture, WAAM). In general, WAAM uses the principle of layer-by-layer cladding and uses arcs generated by welding machines such as molten inert gas shielded welding (MIG), tungsten inert gas shielded welding (TIG), and plasma welding power supply (PA). The heat source, the metal wire is melted, and under the control of the program, the advanced digital manufacturing technology of metal parts is gradually formed from the line-surface-body according to the three-dimensional digital model. It not only has the advantages of high deposition efficiency; high wire utilization rate; short overall manufacturing cycle and low cost; less restriction on the size of parts; easy repair of parts, etc., but also has the ability of in-situ composite manufacturing and forming large-size parts.
 
3D printing of arc fuse metal has great potential
The National Additive Manufacturing Innovation Center of China and the team of Academician Lu Bingheng of Xi'an Jiaotong University used the integrated manufacturing technology of arc fuse to add and subtract materials to manufacture the world's first 10m-class high-strength aluminum alloy heavy-duty carrier rocket connecting ring sample. Major technological breakthroughs have been achieved in-process stability, precision control and deformation and stress control.
 
The 10-meter super-large aluminum alloy ring is a key structure connecting the tube section, front and rear bottom of the heavy-duty launch vehicle tank and the space between the rocket box. The sample weighs about 1t, innovatively adopts multi-filament collaborative process equipment, the manufacturing process is greatly simplified, the cost is greatly reduced, and the manufacturing cycle is shortened to one month. At present, the successful completion of a super large ring using the integrated manufacturing technology of adding and reducing materials is the first international case.
 
With the continuous development of China's aerospace industry, there is a higher demand for large-scale and integrated manufacturing of launch vehicles and space stations. In order to seize the strategic high point of the world's additive manufacturing technology and meet the development needs of China's aerospace industry, the team of academician Lu Bingheng has concentrated on research and development, and has overcome the problems of motion control of multi-channel printing, deformation and stress control of large-size structural parts, and successfully realized large-scale Key technological breakthroughs such as the overall increase and decrease of materials for the aerospace aluminum alloy revolving body components, and the precise control of structure and performance, provide technical support for the rapid development of China's aerospace model engineering.

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