关键词:

Abstract:

A 3D finite element model of high-speed camshaft grinder was set up, and the fundamental parameters of joint surface were identified by inverse solution. By modal analysis for the whole grinder, the weak points of machine dynamic performance were found. Then, the investigation of the low modes for the whole machine revealed the effect of the stiffness parameters at unit joint surface, and the suggestions of structural improvement were proposed. The radial basis function(RBF) model was used to express the implicit function relation, which was about the joint stiffness of bed-base plate system and the frequency of the system. The stiffness parameters of joint surface were determined, by means of mode test for the system and optimization. The results show that this method is simple and available for the whole grinder modeling and the dynamic performance analysis, and the method of increasing the number of bolt on the base plate can improve a dynamic characteristics of the high-speed grinder.

Key words: high speed grinder, whole machine, dynamic characteristic, joint unit, inverse