Preventive Maintenance Schedule of CNC Machine Tool Based on Monte Carlo Simulation

This paper studies the preventive maintenance schedule of CNC machine tool, which is of failure rate of Weilbull distribution. The machine failure cause by tool wear is modeled by Poisson process of Weilbull distribution, and the optimal period preventive maintenance schedule on the principle of maximum average service rate is represented by mathematical model. The existence of optimal preventive maintenance schedule is analyzed. By the means of Monte Carlo stochastic numerical simulation, a sample of optimal preventive maintenance strategy of CNC machine tool is obtained based on the real data of machine failure. The result of the paper shows that the machine preventive maintenance could improve the average service rate, which is valuable to the industry practice.