汽轮机薄壁叶片加工变形预测及误差补偿  

Prediction of Machining Deformation and Error Compensation of Turbine Blade

作　　者：江敏 董久虎 何美蝶 唐天德[1] Jiang Min;Dong Jiuhu;He Meidie;Tang Tiande(Mianyang Polytechnic,Sichuan 621000,China)

机构地区：[1]绵阳职业技术学院 [2]丰田汽车技术中心(中国)有限公司 [3]成都工具研究所有限公司

出　　处：《工具技术》2022年第8期147-152,共6页Tool Engineering

基　　金：四川省科技支撑计划(2010GZ0135)。

摘　　要：针对汽轮机薄壁叶片的加工过程进行简化,建立了叶片加工过程中的切削力模型,在此基础上借助ABAQUS有限元模拟软件对叶片加工变形进行分析,建立了叶片加工变形预测模型。基于反向误差补偿原理,对叶片变形进行了误差补偿。采用NURBS曲线理论对获取补偿后的叶片数据进行优化处理,重构叶片模型。经验证,新构建的叶片模型能够有效减小误差,提高加工质量,为汽轮机薄壁叶片零件提高加工精度及降低变形量提供了一种可参考的误差补偿方法。The machining process of thin wall blade of steam turbine is simplified.The mathematical model of the cutting force of the blade machined by end milling cutter is established.On this basis,the blade deformation prediction model is established by ABAQUS finite element software.According to the principle of reverse error compensation,the blade deformation prediction model is used to compensate the deformation in the process of blade machining.The new cloud image of blade section data is obtained,and the optimization of blade section data is realized by NURBS curve theory.The new blade model is reconstructed.The machining test shows that the new blade model can improve the machining accuracy and quality of the blade in the finishing process.An off-line error compensation method is proposed to improve the machining accuracy of thin-walled blade parts of steam turbine.

关 键 词：薄壁叶片 切削力 加工变形 误差补偿 有限元 

分 类 号：TG501.3[金属学及工艺—金属切削加工及机床] TH161.1[机械工程—机械制造及自动化]