Dynamic Analysis And Optimization Of Structure Of Spiral Bevel Gear Grinding Machine

Spiral bevel gear grinding machine is a finishing device with a high spindlespeed and a high machining accuracy. Therefore, higher static and dynamic stiffnessof machine structure must be guaranteed. Based on linear vibration and machine tooldynamics, the static and dynamic prosperities of the machine tool are analyzed,tested and optimized by the integrated use of finite element technique, optimizationtechnique, and the experimental modal technique in the thesis.Based on ANSYS, the modal and static stiffness of the main components isanalyzed. How the wall thickness parameter influences modal frequency and qualityis summarized by the sensitivity analysis. Then the optimal modification is got bythe dynamic modification and scheme comparison. The dynamic optimizationdesign of bed and the multi-objective optimization of the column are also discussedin detail. The bed is designed by the optimal unit structure and frame and theeigenvalue sensitivity. The initial column is determined according to theconventional schemes comparison method. Then the optimization column wallthickness is determined based on the experimental design, the eigenvalue sensitivity,Response Surface Methodology and the multi-objective optimization method.The FE model of the grinding machine is established by bonding processing thejoint surface. The modal experiment of the machine is accomplished by the dynamictesting system JM5930and modal analysis software N-Modal. By comparing theexperimental results and finite element simulation results, the difference of themodal parameters is smaller. Therefore the finite element model can be as the finalmodel to further optimize.In this paper, the optimization of the components and the establishment of thedynamic model provide basis and information for the R&D of the spiral bevel gearmachine tool.