Reliability analysis of crankshaft for high-speed punch based on Monte-Carlo method

摘要

The crankshaft, which has fateful consequence to the performance and reliability, is a key component of high-speed punch. In manufacturing process, the high reliability value of crankshaft contributes to the increasing of the reliability of the whole punch system. The study builds a reliability analysis model of the crankshaft for punching process under the premise of regarding design parameters as random variables. Monte-Carlo method is employed to make reliability analysis for crankshaft based on ANSYS. The numerical results present that the failure probability of strength and stiffness for crankshaft satisfied the use requirement. The impact of every input variable on reliability are obtained from the sensitivity analysis of status function factors. The design variable D4 and PRXY have the greatest impact on the strength of crankshaft and the design variable YOUNG and L3 have the greatest impact on the stiffness of crankshaft. And the result matches up with the response surface graph. The reliability analysis result provides some useful information for the improvement of the reliability of crankshaft for high-speed punch.