| 摘要: |
| 本文针对液体火箭发动机“C口”管通结构产品SLM成形过程中变形大的问题，采用Simufact Additive仿真软件对进气导管成形工艺进行了仿真分析。仿真结果显示，在“C口”弯管端口添加约束支撑，可防止弯管在成形过程中发生变形，但支撑去除后，在内应力作用下弯管部位会出现较大变形。成形结束后，低温退火处理（500℃）不能完全消除产品内应力，产品支撑去除后仍会发生较大变形；高温退火（1100℃）可消除成形应力，支撑去除后产品基本无变形。按仿真结果获得优化方案进行产品成形，产品尺寸公差满足CT6要求，模拟仿真对“C口”管通产品的高质量成形具有实际指导意义。 |
| 关键词: 液体火箭发动机 激光选区熔化成形 “C口”管通 仿真 变形控制 |
| 基金项目: |
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| Simulation Research on Selective Laser Melting of “C-Port” Elbow Structure Products |
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Li Hailiang1, Zheng Wei2,3, Xie Linjun2, Bai Ruixing2,3, Wang Dingwen2,3
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1. Academy of Aerospace Propulsion Technology, Xi’an 710100;2. Xi’an Space Engine Co., Ltd., Xi’an 710100;3. National Defense Technology Industry Manufacturing Technology Innovation Center of Space Special Component, Xi’an 710100
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| Abstract: |
| Aimed at the large deformation problem of the SLM process for the “C-Port” elbow structure product in liquid rocket engine, the forming process of the inlet duct was simulated and analyzed by Simufact Additive simulation software. The simulation results show that restraint-support added to the “C-Port” elbow-end could prevent the deformation during the SLM process, but after removing the support, the elbow deformed dramatically due to the internal stress. The low-temperature annealing treatment (500℃) could not completely eliminate the SLM forming stress of the parts, and the large deformation occurred after removing the support; In contrast, the high-temperature annealing (1100℃) could eliminate the SLM forming stress, and deformation would not occur after removing the support. Based on the result of simulation, the optimization scheme was obtained and used to produce the inlet duct, the dimensional tolerance of the parts met CT6 requirements, meaning that the simulation has practical guiding significance to the high-quality forming of the “C-Port” elbow product. |
| Key words: liquid rocket engines selective laser melting C-Port elbow simulation deformation control |
