Abstract:Aiming at the lightweight requirements of the main load-bearing components of the 20kg micro-nano remote sensing satellite camera, and taking the three main load-bearing components of the camera adapter ring, the secondary mirror ring and the main backplane as the research background, the structural design and key manufacturing technology research of selective laser melting additive manufacturing technology is carried out in this paper. The results show that the designed 0.5mm hemming structure has good mechanical properties such as compression resistance and torsion resistance, and can significantly improve the support strength of the component while achieving light weight. Through the 45° inclined wall and micro-truss structure, additive manufacturing without auxiliary support is realized. Starting from three aspects: energy input, structure fine-tuning and accelerated heat conduction, it effectively solves the problem of sharp corner deformation during the printing process. Finally, three lightweight main load-bearing members with masses of 89g, 87g and 546g are obtained. Carrying the principle prototype to carry out system assembly and ground mechanics test, it passes the 8G gravitational acceleration test, realizing the high bearing capacity and light weight of the main bearing components of the large and complex structure of the satellite camera.