摘要
针对航空发动机压气机辊轧叶片前后缘溢料端数控加工问题,提出了一种基于设计曲面几何调控的前后缘加工曲面自适应重建方法。根据自由变形理论以及曲面能量控制原理,建立了具有变形约束能力的自由曲面几何调控模型;利用该模型建立了基于遗传算法求解的辊轧叶片前后缘加工曲面自适应重建策略。该策略通过微量调整叶片设计曲面几何形状,使其在逼近叶身型面测量数据的同时尽可能维持初始几何形状,最终实现了辊轧叶片前后缘加工曲面的自适应重建。实例验证结果表明:利用该方法获得的辊轧叶片前后缘加工曲面可以在保证叶片形状精度的同时实现其与实际叶身的圆滑转接。
To solve the CNC milling problems of the material forced outwards at leading and trailing edges of rolling compressor blades of aeroengine,an adaptive machining surface reconstruction method was proposed based on geometric adjustment of the design surfaces.Firstly,according to the free-form deformation theory and the surface energy control principle,a geometric control model of free-form surfaces with the use of deformation constraints was established.Then,based on this model,an adaptive surface reconstruction strategy was established based on genetic algorithm for leading and trailing edges of the rolling blades.By slightly adjusting the geometric shapes of the blade design surfaces,the deformed surfaces might move close to the measurement points of the blade bodies without losing their initial geometry seriously.Thus,the machining surfaces for the leading and trailing edges of the rolling blades might be reconstructed.The results show that the leading and trailing surfaces reconstructed with the above method may meet the shape accuracy and realize smooth transition with the actual blade bodies at the same time.
作者
崔康
汪文虎
蒋睿嵩
CUI Kang;WANG Wenhu;JIANG Ruisong(Automation Department,Shanxi University,Taiyuan,030006;Key Laboratory of Contemporary Design and Integrated Manufacturing Technology,Ministry of Education,Northwestern Polytechnical University,Xi'an,710072;School of Aeronautics and Astronautics,Sichuan University,Chengdu,610065)
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2020年第13期1593-1600,1605,共9页
China Mechanical Engineering
基金
山西省高等学校科技创新资助项目(2019L0036)。
关键词
辊轧叶片
前后缘
加工曲面
自适应建模
形状调整
rolling blade
leading and trailing edge
machining surface
adaptive modeling
shape adjustment
作者简介
崔康,男,1985年生,博士研究生,研究方向为航空复杂零件精密成形,E-mail:cuikang@sxu.edu.cn。
