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How to assemble the spindle of a CNC machine tool?


Assembling the headbox: As it is very difficult to disassemble and assemble the electric spindle after assembly, in order to further test whether the pre-tightening force of the spindle is reasonable and whether the temperature rise of the front and rear bearings of the spindle is too high, the headbox is assembled and transported without installing the rotor and stator. test. To prevent leakage, install the front and rear water jackets on the front and rear flanges, and pass the front and rear water jacket components into 15bar pressure cooling water respectively, and conduct a leak test for 2 hours.

Spindle pre-tightening: One of the most prominent problems of the electric spindle is the heating of the built-in high-speed motor. Since the main motor is next to the spindle bearing, the heating of the motor will directly affect the temperature rise of the spindle bearing. If the pre-tightening force of the spindle bearing is too large, it will lead to Excessive temperature rise of the spindle will directly reduce the working accuracy of the bearing. If the preload is too small, it will affect the rigidity of the spindle. In addition, the electric spindle is a high-speed spindle, and the small imbalance of the spindle movement will cause huge Spindle Assembly Parts suppliers centrifugal force to cause the vibration of the machine tool, affect the machining accuracy and surface quality, and reduce the life of the machine tool. Therefore, the preload of the spindle and the imbalance of the spindle assembly must be Make sure before installation.

Spindle assembly dynamic balance: The electric spindle is a high-speed spindle. The small unbalance of the spindle movement will cause huge centrifugal force, cause vibration of the machine tool, affect the precision and surface quality of the machine tool, and reduce the life of the machine tool. Therefore, the spindle must be controlled when the electric spindle is assembled. The unbalanced amount of the component.

Assemble the box: After the stator and rotor are assembled, reassemble the box. a) Put the headstock upright on the basis of the front end of the headstock box. b) Put the spindle assembly into the box and tighten the screws. c) Install the back cap.