The aim of this research paper is to simulate the process of gear meshing in the planetary gear system (PGT) of CNC bending machine to evaluate the friction coefficient, friction force, and wear rate ...of EN24 material. EN series of steel is typically used for gear manufacturing. The PGT is capable of transmitting huge torque and provides high performance along with huge reduction ratio. It is used on a grand scale in many applications. Effective meshing is observed at the sun and planet gear interface only. Tests are performed on a cylinder-on-disk machine with varying loads from 60 to 110 N for time duration of 5 min at 1250 rpm. The outcomes elucidate that the friction coefficient fluctuates with time and normal load. From experimental inspection, it is observed that the friction coefficient increases with rubbing time and after that remains constant for a rest period. From experimental investigation, it is observed that the friction coefficient and wear increase with an increase in normal load. It is observed that the presence of carbon content leads to fluctuation in wear rate. Wear measurement test was carried out for EN24 materials by rubbing different cylinders on EN-31 disk.
According to the relationship of failure time between system and subsystems of CNC Bending Machine, a Monte Carlo simulation model is constituted. Considering reliability influencing factors, the ...factor weight is determined by fuzzy scoring and analytical hierarchy process. Comparing the relationship status of old CNC Bending Machine and new CNC Bending Machine, reliability growth coefficient is proposed based on reliability influencing factor weight and fuzzy scoring. Reliability prediction model is constituted by combining reliability growth coefficient and the Monte Carlo simulation model. The prediction model could predict reliability distribution, reliability index, failure frequent based on Weibull distribution and so on.
