The NC machining is the most important processing method for the blisk of aero-engine. The NC machining process is an important step to ensure that the geometric precision of the blisk meets the design requirements. According to the design of three-dimension digital model

the shape of the blade after finish milling can meet the dimensional tolerance of the drawing

but the flow-up blade surface finishing and strengthening process have different degrees of infullence on the character of the blade shape of the blisk

resulting in final geometric dimensions of the blade shape beyond design requirements. By analyzing the surface finishing and strengthening process such as polishing process

  vibratory finishing process

shot peening process

the paper determine its influence law and magnitude on the blade shape parameter

then according to the pre-deformed control technology

revise the machining model and program of the finishing process

allowing the blade to obtain the shape and position opposite to the deformation law of the subsequent surface finishing and strengthening process after finishing milling. At last

eliminate these pre-deformations in subsequent processing to achieve the goal of obtaining a qualified blisk in the delivery state.