The method of balancing the machine tool spindle and the scale of application

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The method of balancing the machine tool spindle and the scale of application

Source: China Bearing Network Time: 2013-01-11

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The use and development of high-speed machine tools; the demand for spindle speed is improved. However, the spindle parts of the machine tool are in the process of production; inevitably, the center of gravity violates the rotation center due to uneven material, asymmetrical shape, and processing and installation errors; Oscillation force; causing machine noise, bearing heat, etc. followed by an increase in speed; the oscillation caused by imbalance is more intense.
Because the deformation of the spindle component of the machine tool is very different. It is also suitable for the slaughter of sodium rubber. The rotor is regarded as a positive rigid body; and the operation is assumed; the shaft under the effect of unbalanced centrifugal force will not The deformation is obviously deformed. For this reason, many disordered imbalances of the rigid rotor under these conditions can be simplified to the imbalance of the force system; that is, two equivalents of Ud1 can be added or subtracted on the two planes selected in the desired manner. ; and Ud2's dynamic balance makes it balanced.
The rigid rotor dynamic balance is usually low-speed dynamic balance; usually it is less than 1/3 of the top critical speed.
Unbalance: the mass of the rotor due to the effect of centrifugal force on the bearing oscillation or motion.
Residual imbalance U: Balanced balance after disposal.
Relative imbalance e: the value obtained by dividing the imbalance by the mass of the rotor; it is equal to the displacement of the centrifugal force with respect to the middle of the shaft.
The degree of balance G: is the product of relative imbalance and specified angular velocity.
Balanced Disposal: The operation of adjusting the rotor mass spread to make the effect of the oscillations and forces on the bearing synchronized with the rotational speed within specified limits.
Full key: It is the rotating shaft with the keyway and the cooperation part; the key used for the end installation is equivalent.
Half-key: It is a pair of rotating shafts with keyways or cooperative parts; the keys used when performing dynamic balance treatment on their own. This imbalance and the key used in the end assembly (unbalanced in the keyway of the rotating shaft or the cooperative part) )appropriate.
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