Analysis and optimization of main influencing factors on vibration offset of aerostatic spindle

Abstract

Purpose This paper aims to study the influence degree of three factors affecting the vibration amplitude of aerostatic spindle and optimizes each factor. Design/methodology/approach The vibration amplitude of the spindle is characterized according to internal structure and operating characteristics of aerostatic spindle. The radial and axial vibration models of aerostatic spindle were established by the spring-damper system. The influence degree of main influencing factors on the spindle vibration amplitude was investigated through correlation analysis. Findings The results indicate that the crucial factor is aerostatic spindle speed and experiments validated that increasing spindle speed can enhance spindle stability. The influence of three factors on radial vibration is greater than that on axial vibration. Finally, the values of optimal working parameters were obtained by genetic algorithm. Originality/value The method in this article can effectively predict aerostatic spindle vibration amplitude and perfect the stability of aerostatic spindle.