Cause analysis and solutions for common failures of Aluminum profile extrusion press machine


Analysis of the reasons for the Aluminum profile extrusion press machine of the main motor: failure of the oil lubrication system, poor alignment of the main motor’s output shaft and the gearbox shaft, motor and clutch vibration, etc. will damage the main motor bearings, resulting in excessive torque. In addition, excessive feeding load or poor material melting will also cause the main motor torque to be too high. Solution: Regularly check and clean the lubricating oil system, measure the main motor bearings with a vibration measuring instrument and an infrared thermometer, and form a trend chart. If the trend value is exceeded, determine whether the idling current value or power value of the main motor exceeds the specified value, and judge whether the bearing should be replaced. Regularly check the alignment between the output shaft of the main motor and the input shaft of the gearbox. The alignment must be checked after the first drive or three months after the bearing is replaced. Conduct electrical tests to determine the cause of the rotor imbalance; perform a vibration speed test on the clutch, if it exceeds the specified value, re-adjust the dynamic balance. Check the simplified heating and cooling system regularly to ensure that the materials are heated evenly and fully melted. If the power curve of the main motor and the melt pressure curve increase momentarily when the extruder is started, it indicates that the feeding amount of the feeding system is momentarily too large, and the feeding amount should be reduced.


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