DIAGNOSTIC OF MANUFACTURING AND ASSEMBLING FAULTS OF SPINDLE UNITS ON ROLLING BEARINGS

Юрий Михайлович Данильченко, А. И. Петришин

Abstract


Purpose. Has been developed resonance method, which allows diagnostic of the manufacturing and assembling faults of spindle units on rolling bearings, which cause low frequency vibrations. Design/Methodology/Approach. Method is based on carrying out experimental and theoretical researches of the dynamic behavior of spindle unit that mounted on test rig. Test rig consists of frame, elastically fixed on massive foundation, and spindle unit, which is attached to frame. The essence of the method is estimation of spindle unit vibration magnitude relative to spindle unit body during resonance mode of the frame on characteristic frequencies of manufacturing and assembling faults of spindle units. Experimental part of the method consists of determination of the first resonance frequency of the test rig’s frame and measurement of spindle unit body vibrations on spindle unit rotating frequencies that represent resonance modes of the frame on faults characteristic frequencies. Theoretical part consists of modeling of vibration spectrums of the end of tool fixed in spindle unit, which are relative to experimental vibration spectrums of the spindle unit body, with following determination of spindle unit comparative vibration magnitudes on faults characteristic frequencies. Findings. Results of the vibration-based diagnostic of manufacturing and assembling faults of grinding head ВСЗ 27-65.250 А confirms the effectiveness of developed method for diagnostic of the faults, which cause low-frequency vibrations. Originality/value. The most promising is usage of developed method for diagnostic of the manufacturing and assembling faults of low-speed spindle units.


Keywords


spindle unit; manufacturing and assembling faults; resonance method of vibration-based diagnostic

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DOI: http://dx.doi.org/10.20535/2305-9001.2015.75.57652

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