Proper

Abstract

Spindle operating characteristics have a direct impact on the machining accuracy of the machine tool. Firstly, Based on finite element analysis method, the static and dynamic structural are modeled for CK61125 computer numerical control machine tool spindle after the loads and structural analysis. For this purposes, the spindle stress and strain are analyzed in 2 ton and 6 ton loading. The results show that the maximum stress is 139.26MPa, the maximum strain is 0.67μm/mm, the maximum spindle stiffness is 1000N/μm. The results are meet the spindle strength and stiffness requ[irements. Secondly, the modeling and analysis for spindle modal based on finite element analysis method, the results show that the first-order resonance frequency is 861.51Hz, the second-order resonance frequency is 867.99 Hz, the third- resonance frequency is 965.15Hz. At the end, the spindle vibration characteristics are tested in different speeds under the no-loading and loading working environment. The test results show that the spindle highest vibration frequency are 87.8Hz,107.4Hz and 244Hz. They are less first-order resonance frequency. All those parameters are meet spindle static and dynamic working characteristics.