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SIZE:30x100x16mm
1) Troubleshooting
In the process of investigating the failure of the spindle not to rotate, the fault points are as follows: ①The rolling bearing used in the electric spindle of the CNC grinding machine is not preloaded. ② The hexagon socket head screw at the top of shaft I is loose. ③ The inner cavity of the hollow shaft is damaged. ④The shaft sleeve is cracked. ⑤ The adjusting nut is grinded to death.
(2) Fault analysis
The main shaft does not rotate, and the hexagonal socket head screw in the shaft is loose. During the high-speed operation of the main shaft, the operation of the shaft II and the gasket cannot be synchronized, and the gasket will rotate to the internal structure of the shaft II. The gasket and the shaft II The raw material is different, and the gasket is harder than the shaft II. The main shaft often works like this, resulting in damage to the inner collar of the shaft II, and at the same time the distance between the inner collar of the shaft II and the sleeve port is reduced, but the distance between the shaft sleeve in the shaft I and the left port of the gasket remains the same, so It is prone to "shaft elongation", causing the rotor shaft to be pre-tightened as a whole, and the axial movement is 0.5mm, which also leads to the deviation of the parallelism between the axis I and the axis II.
The shaft I and the shaft sleeve are tightly fitted, and the split of the shaft sleeve enables the shaft sleeve to rotate around the shaft I, so that when the main shaft rotates at high speed, the operation of the shaft I and the shaft II cannot be synchronized, resulting in too much load on the electric spindle , the amount of current expands. If the electric spindle works like this for a long time, it will also cause the electromagnetic coil to burn out, the electrical components will age, and the service life will be shortened.
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