Lead to a common cause of high-speed precision machine tool bearing noise analysis

The vibration of the high-speed precision machine tool bearings for bearing failure effect is very significant. Such as peeling, indentation, rust, crack and wear will be reflected in the bearing vibration test so overall by the use of special eccentric bearing vibration measurement device ( Frequency analyzer and vibration meter, etc. ) Can measure the size of the vibration through the frequency distribution can be concluded that the details of the abnormal vibration measured values due to the use of the bearing premise or sensor installation position and different therefore require prior to each machine measurement value judgment dimension after analysis and comparison. 1, the scars of the sound ( Fretting wear) Background: the motor can be shipped to air conditioning factory inspection found when the noise to noise. 'The sound. Reason: due to transportation when turbulence vibration, high speed precision machine tool bearings between the ball and roll fretting wear caused by sound. Countermeasures: improve the packaging and transportation mode, micro wear resistant grease, in order to improve the qualified rate. 2, scars, Brinell indentation) Background: after the motor assembly, the examination of the noise, found that noise. . 'The sound. Reason: to press the shaft into axle shaft collar or bearing housing, bearing internal brinell creasing. Countermeasures: the resistance to creasing bearing design, in order to improve the qualified rate of assembly, 'NSK' indentation resistance design. 3, maintain sound background: after the motor assembly, found that the noise when the examination of the noise. 'The sound. Reason: the retainer and the ball friction caused by collision phase noise. Countermeasures: the retainer retainer grease. 4, foreign bodies, sound background: after the motor assembly, found that the noise when the examination of the noise. 'The sound. Reason: the foreign body into the internal of high-speed precision machine tool bearings. Countermeasures: improve the assembly line, the purity of the rotor and bearing.