整体叶盘超硬磨料柔性抛光轮几何参数与力学性能分析  

Geometric parameter and mechanical property analysis of flexible polishing wheel with superhard abrasive for blisk

作　　者：苏宇浩 焦磊 何志强 谢卓群 SU Yuhao;JIAO Lei;HE Zhiqiang;XIE Zhuoqun(Guizhou Liyang Aero-Engine Co.,Ltd.,Guiyang 550000,CHN;School of Mechanical Engineering and Automation,Beihang University,Beijing 100191,CHN)

机构地区：[1]中国航发贵州黎阳航空动力有限公司,贵州贵阳550000 [2]北京航空航天大学机械工程及自动化学院,北京100191

出　　处：《制造技术与机床》2023年第2期127-133,共7页Manufacturing Technology & Machine Tool

摘　　要：整体叶盘是航空发动机关键部件,采用超硬磨料柔性抛光轮的数控抛光已成为替代人工打磨、提高整体叶盘表面质量的有效方式之一。文章以复杂母线超硬磨料柔性抛光轮为对象,分析建立等效直径及抛光力模型,从而实现抛光过程几何参数和力学性能的优化。其中,利用测力仪将抛光轮几何参数转化成力学参数,建立等效参数计算模型,通过关系式反推获得抛光轮的等效直径,从而改善动态直径测量的不准确所带来的抛光去量偏差;设计单因素正交试验测量不同加工参数下的抛光力,及各因素对抛光力的影响规律,进而在抛光轮稳定工作状态下,建立抛光力的经验模型,可用于整体叶盘数控抛光过程中的真实抛光力预测。实验证明,等效直径测量精度较动态测量可提升2.02%,抛光力的实际值和模型拟合值贴合度非常好,相关系数达到0.999。Blisk is a key component of aeroengine.NC polishing with super-hard abrasive flexible polishing wheel has become an effective way to replace manual polishing and improve the surface quality of blisk.In this paper,the equivalent diameter and polishing force model of the flexible polishing wheel with complex generatrix super-hard abrasive is analyzed,and established to optimize the geometric parameters and mechanical properties of the polishing process.Among them,the geometric parameters of the polishing wheel are converted into mechanical parameters by force measuring instrument,the equivalent parameter calculation model is established,and the equivalent diameter of the polishing wheel is obtained by inverse deduction of the relationship,so as to improve the polishing measurement deviation caused by the dynamic diameter measurement inaccuracy.A single factor orthogonal experiment was designed to measure the polishing force under different processing parameters,and the influence of each factor on the polishing force.Then,under the stable working state of the polishing wheel,an empirical model of the polishing force was established,which can be used to predict the real polishing force in the NC polishing process of the blisk.The experiment proves that the accuracy of equivalent diameter is 2.02%higher than that of dynamic measurement,and the actual value of polishing force and model fitting value fit very well,with the correlation coefficient reaching 0.999.

关 键 词：整体叶盘 柔性工具 几何参数 力学性能 

分 类 号：TH161[机械工程—机械制造及自动化]