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To predict the life of the clutch friction plate, friction characteristics of the friction plate and the steel sheet assembly are analyzed in the full life cycle. A contact model of the friction surface is built based on the micro-convex body model. Wear mathematical models of friction plate are established respectively based on the contact model and sliding friction work model. The wear results of the two models are compared and analyzed. The effect of temperature on wear is considered. Fatigue life of the friction plate is predicted by wear mathematical model according to the real working states. The accuracy of the contact model and the influence of temperature on the wear are determined through the comparative analysis of each prediction result.

To solve leakage failure of the product caused by uncertain factors, the clutch sleeve and shell are taken as an example for development of processing. Finite element model of clutch sleeve and shell is established, and the stress deformation is ascertained and analyzed under working load. Based on actual operating conditions of the clutch sleeve and shell, the mathematical model of leakage failure is established considering the factors of load, temperature, manufacturing error and assembling deviation. The clearance between the clutch sleeve and shell is determined and discussed using the model based on the influence of various factors. To reduce the size of the clearance, a relevant improvement that the increased step is added on outside of the sleeve is put forward. The results of discussion on the improved assembly and analysis of actual samples prove that the scheme is effective.