基于浮动装夹自适应加工工艺的薄壁件加工变形控制技术研究

Research on Deformation Control Technology for Thin-Walled Parts Based on Responsive Fixture Adaptive Machining Process

航空薄壁件尺寸大、壁薄、材料去除率高,极易发生加工变形问题,严重影响零件加工质量,因此航空薄壁件的加工变形控制具有重要的意义。以某传扭转接盘作为研究对象,基于加工过程中的监测变形力重构毛坯全局残余应力分布,优化了零件的加工位姿,并结合浮动装夹自适应加工工艺实现了零件的加工变形有效控制。实际加工试验将零件的平面度和平行度分别控制在0.11mm和0.04mm,结果表明,该方法能显著控制工件加工变形。

Aeronautical thin-walled parts are characterised by large dimensions,thin walls and high material removal rates,which is highly susceptible to machining deformation problems.Machining deformation seriously affects the quality of the parts machined,therefore,the machining deformation control of aviation thin-walled parts is of great importance.In this paper,a transmission reverse disc is used as the object of study,to optimise the machining position of the part by reconstructing the global residual stress distribution of the blank based on the monitored deformation forces during the machining process,at the same time,combined with the responsive fixture adaptive machining process,which enable effective control of the machining deformation of the part.The actual machining tests control the flatness and parallelism of the part to 0.11 mm and 0.04 mm respectively.The results show that the method can significantly control the machining deformation of the part.