In order to investigate the influence of machining deviation of curvic couplings on the contact status and mechanical characteristics and to optimize the assembly angle of curvic couplings connection,the force model of curvic couplings structure was analyzed,the effect of surface deviation on contact pressure was investigated,and the tangential stiffness model of curvic couplings connection was established.Theoretical and experimental studies showed that the tooth surface deviation led to inconsistency of curvic couplings contact status and mechanical characteristics.The optimized assembly angle can improve the tangential stiffness and optimize the mechanical characteristics of the assembly during the initial tangential stiffness phase and the stiffness loss phase.This could provide a basis for the study of the assembly characteristics and optimization of the assembly process of the curvic couplings connection structure,which is of great significance to improve the assembly quality of the aero-engine rotor with curvic couplings connection.
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