Aiming at improving CNC milling efficiency of discrete aeronautical manufacturing enterprises by using Six Sigma tools and methods and integrating the core idea of international overall equipment efficiency (OEE)

and the sample of aluminum alloy parts produced in an aviation enterprise is statistically analyzed based on VERICUT simulation software. Besides

several common problems of inefficient programs are identified. By introducing the concept of efficiency baseline

the project finds a considerable way to control the key factors such as material removal rate (MRR)

surface machining rate (SMR)

empty knife rate

etc. Finally

a numerical control milling efficiency evaluation method and program control ideas are proposed

which can be used to control the efficiency of the program effectively by preventing the inefficient programs from flowing into the production line

and a lot of time waste

and labor cost can be reduced. As a consequence

the delivery rate of the digital production enterprise can be improved dramatically

and the core competitiveness of the company will be enhanced.