반응표면분석을 이용한 연삭가공용 스핀들 형상 최적화

Abstract

To improve the accuracy of a machine, research needs to be conducted on the relationship between the output variables and designvariables of a spindle-shaped part from the thermal and static viewpoints. Therefore, research was carried out by examining the correlation of eachvariable to find the optimum conditions. Moreover, DOE (design of experiments) was extensively used. The model used in this study was agrinding spindle to which a hydrostatic bearing was applied. This model was used in a preliminary analysis based on the experimental results ofthe previous studies. The influences of the output variables and design variables were compared through a main effect analysis. Generated responsesurfaces were applied to the Kriging model. To optimize the model, a screening method was selected. In comparison with the initial model, thedeformation of the optimized model designed by DOE decreased by 4.1 ㎛, while the thermal deformation decreased by 1.2 ㎛. Therefore, it wasefficient to design a spindle-shaped part through DOE to improve the accuracy of the machine.