Abstract:The machine tool deformation is one of important factors which affect the workpiece surface quality. The paper proposed a method to optimize the milling parameters based on dynamic stiffness measurement and milling force model. The machine tool dynamic stiffness is obtained by step response experiment, and the milling force model coefficient is defined through orthogonal experiment. At last, the paper designed the tool online measurement and the milling force online measurement setup to verify the optimized parameters, and its validity and feasibility are proved.