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| 航空发动机高温合金隔热屏局部特征成形缺陷分析及工艺优化 |
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田孟良1, 周华博*2,3, 涂 泉1, 汪 祥1, 丁清国1, 邓元贵1, 柳钰锴1, 刘志飞1, 刘 伟2,3
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1. 中国航发贵州黎阳动力有限公司，贵阳 550014;2. 哈尔滨工业大学材料科学与工程学院，哈尔滨 150001;3. 哈尔滨工业大学金属精密热加工国家级重点实验室，哈尔滨 150001
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| 摘要: |
| 针对航空发动机加力室隔热屏壁厚薄、局部尺寸小、曲率突变大、成形时表面起皱、凸包减薄和拉裂等问题，开展了零件特征尺寸分析和冲压工艺计算，分析工艺设计中的不足及缺陷产生的原因。基于材料极限变形能力，在零件冲压工艺仿真的基础上，提出多道次成形、变形量分解的方法；采取了工序间热处理的改进措施，实现对零件变形中材料流动顺序的合理分配，解决了薄壁隔热屏大突变局部结构在冲压过程中缺陷难以控制的技术问题，实现突变结构合理的钣金成形工艺优化的目的。 |
| 关键词: 隔热屏 模拟仿真 工艺优化 热处理 |
| 基金项目: |
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| Forming Defects Analysis and Process Optimization on Local Features of Supperalloy Heat Shield for Aeroengine |
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Tian Mengliang1, Zhou Huabo*2,3, Tu Quan1, Wang Xiang1, Ding Qingguo1, Deng Yuangui1, Liu Yukai1, Liu Zhifei1, Liu Wei2,3
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1. AECC Guizhou Liyang Aeroengine Co., Ltd., Guiyang 550014;2. School of Material Science and Engineering, Harbin Institute of Technology, Harbin 150001;3. The State Key Laboratory of Precision Thermal Processing of Metals, Harbin Institute of Technology, Harbin 150001
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| Abstract: |
| Aiming at the problems of thin wall thickness, small local dimensions, large curvature mutation, surface wrinkling, convex thinning and pulling cracks during forming of the heat shield of the aero-engine charging chamber, the characteristic size analysis of the part and the stamping process calculation were carried out to analyse the deficiencies in the process design and the reasons for the defects. Based on the ultimate deformation capacity of the material, the method of multi-channel forming and deformation decomposition was proposed on the basis of the simulation of the stamping process of the parts; the improvement measures of inter-process heat treatment were taken to achieve a reasonable distribution of the material flow order in the deformation of the parts, to solve the technical problem of the defects of the local structure of thin-walled heat shield with large mutation that was difficult to be controlled during the process of the stamping, and to achieve the optimisation of sheet-metal forming process for the reasonable mutation structure. The optimisation of the sheet metal forming process was achieved. |
| Key words: heat shield simulation analysis process optimization heat treatment |
