Deflection may occur in thin-walled blade machining,which will influence machining precision.This paper adopts flexible model to calculate the deflection in blade machining.Firstly,the cutting force formula of ball mill is determined through the orthogonal simulation experiments,and cutter contact points in NC machining are given.Then,the cutting force is loaded on the blade finite element grid nodes.Finally,the blade deflection is calculated with the flexible deflection iterative algorithm.The presented me...