The failure phenomena and specific reasons of the ball screw pair during operation are as follows:
1. Large backlash, poor positioning accuracy, and unstable size of processed parts.
The wear clearance of the ball screw pair and its support system due to long-term operation will directly affect the transmission accuracy and rigidity of the CNC machine tool. Common fault phenomena include large backlash and unstable positioning accuracy. According to the specific location of the wear, the cause of the failure can be divided into the following categories: How to improve the accuracy of the ball screw pair? The ball screw support bearing is worn or the bearing preload washer is not matched properly. The double nut pair of the ball screw produces clearance and ball wear.
2. The movement of the ball screw is not stable and the noise is too loud. The servo motor drive parameters have not been adjusted well. The screw nut is poorly lubricated. The ball screw is bent and deformed.
