航空发动机排气短管成形工艺分析
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摘要
由于航空发动机排气短管壁薄、深度深、型面复杂,使得成形比较困难。本文提出了一种带下压板冲压的成形工艺方案,通过DIC(数字图像相关)技术测试了零件材料的力学性能,通过冲压仿真获得了材料三种不同流动方式下的成形结果,并与传统冲压方式进行了对比。结果表明,带下压板的冲压成形比传统冲压成形能有效地改善材料流动性,减小零件最大减薄率,获得更优的成形质量。同时,不同的材料流动方式也对零件最终的减薄率产生较大的影响。
The aero-engine exhaust short pipe is difficult to form because of its thin wall, big depth and complex profile.A forming process scheme of stamping with lower pressure plate was put forward. The mechanical properties of the part material were tested by means of digital image correlation(DIC) technique, and the forming results of the material in three different flow modes were obtained by stamping simulation and compared with that of the traditional stamping methods. The results show that compared with that of traditional stamping, the stamping forming with the lower pressure plate can effectively improve the fluidity of the material, reduce the maximum thinning rate of the parts, and obtain better forming quality. At the same time, different material flow patterns also have a great impact on the final thinning rate of the parts.
The aero-engine exhaust short pipe is difficult to form because of its thin wall, big depth and complex profile.A forming process scheme of stamping with lower pressure plate was put forward. The mechanical properties of the part material were tested by means of digital image correlation(DIC) technique, and the forming results of the material in three different flow modes were obtained by stamping simulation and compared with that of the traditional stamping methods. The results show that compared with that of traditional stamping, the stamping forming with the lower pressure plate can effectively improve the fluidity of the material, reduce the maximum thinning rate of the parts, and obtain better forming quality. At the same time, different material flow patterns also have a great impact on the final thinning rate of the parts.
引文
[1]杨树余,谷立平.航空发动机环形燃烧室内形冲压工艺[J].模具制造,2011(11):21-24.
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[3]杨树余,赵宝群,尹小波,等.重燃火焰筒胀形工艺及其模具结构[J].航空制造技术,2014(s1):47-49.
[4]李文学,李民,马艳玲,等.复杂形状整流罩冲压成形过程优化研究[J].锻压技术,2010,35(3):42-46.
[5]付磊,刘迪辉,孙光永,等.基于DIC技术和硬度试验的焊缝材料参数识别新方法[J].中国机械工程,2013,24(2):274-279.
[2]刘振岗,叶广宁,张玎,等.某型航空发动机导流环旋压成形工艺研究[J].新技术新工艺,2016(2):16-18.
[3]杨树余,赵宝群,尹小波,等.重燃火焰筒胀形工艺及其模具结构[J].航空制造技术,2014(s1):47-49.
[4]李文学,李民,马艳玲,等.复杂形状整流罩冲压成形过程优化研究[J].锻压技术,2010,35(3):42-46.
[5]付磊,刘迪辉,孙光永,等.基于DIC技术和硬度试验的焊缝材料参数识别新方法[J].中国机械工程,2013,24(2):274-279.