As the most common and most used machine in the market, the daily maintenance of the machining center is very necessary. At present, in the production of this model in China, the process technology is similar. Here are some common fault analysis of vertical machining centers.
1. The spindle tool cannot be removed
Possible reasons for the failure: A. The solenoid valve for loosening the knife does not act; B. The tool pull stud is incorrect; C. The stroke of the knife cylinder does not meet the requirements; D. There is a problem with the four-claw claw and cannot be opened; E. The amount of knife cutting is too small.
2. Tool changer for tool magazine
Possible causes of failure: A. The sensor switch for loosening the knife fails; B. The solenoid valve for loosening the knife fails; C. The hydraulic cylinder for loosening the knife does not move due to insufficient system pressure or oil leakage, or the stroke is not in place; D. There is a problem with the manipulator system; E . There is a problem with the spindle system; F. There is a problem with the tool holder.
3. Abnormal noise of spindle
Possible causes of failure: A. There is a problem with the tension and position of the belt assembly (belt spindle); B. The spindle bearing is damaged; C. Resonance; D. The main motor is faulty; E. The system parameters are set incorrectly.
4. There is abnormal noise when the axis moves rapidly
Possible causes of failure: A. The moving guard plate is damaged; B. The screw bearing is damaged; C. The screw nut pair problem; D. The wire gauge slider problem; E. The servo motor failure.
5. Common faults of ball screw pair
Possible causes of failure: A. Lead screw noise: The gland of the lead screw support bearing is not well pressed, the lead screw support bearing is damaged, the motor and lead screw coupling are loose, the lead screw is poorly lubricated, and the lead screw ball is damaged. B. The movement of the ball screw is inflexible, the axial preload is too large, the screw is not parallel to the guide rail, the nut axis is not parallel to the guide rail, and the screw is bent and deformed. C. Poor lubrication of the ball screw
6. Lubrication system failure alarm
Possible causes of failure: A. Large loss of lubricating oil; B. Insufficient lubrication of guide rails; C. Lubrication system pressure cannot be established.
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