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Maintenance and maintenance of ball screw

Information Sources:本站 | Release Date: 2017-05-18 | Browser:
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Ball screw pair is screw and nut between the ball for the rolling of the spiral drive components. It can be rotated into a linear motion, or linear motion into a rotary motion. So the ball screw is both the original drive, but also linear motion and rotary motion mutual conversion components.
 
Ball screw vice routine maintenance and maintenance methods have the following:
 
(1) elimination of axial clearance. After the ball screw is disassembled, the axial clearance must be eliminated to ensure reverse drive accuracy and axial stiffness. The double-nut ball screw eliminates the gap by using the relative axial displacement of the two nuts so that the balls in the two ball nuts are in close contact with the opposite sides of the thread raceway, respectively. With this method to pre-tighten the axial clearance, it should be noted that the preload should not be too large, otherwise it will increase the no-load torque, thereby reducing the transmission efficiency.
 
(2) lubrication of the ball screw. Lubricants and lubricants can be used to lubricate. Grease is generally added to the threaded raceway and the housing of the mounting nut, and the oil is injected into the nut's space through the oil holes in the housing. Should be replaced once every six months on the grease on the ball screw, cleaning the old grease on the screw, coated with new grease. Lubricants lubricated with a ball screw can be refueled once every machine work.
 
(3) Ball screw protection. Ball screw should avoid dust or chips, such as the use of coil spring steel casing, telescopic casing or folding casing and so on. Install one end of the protective cover on the end of the ball nut and the other end to the bearing of the ball screw.
 
If the ball screw is in a hidden position, you can use the ring protection, the seal on the nut at both ends. The contact seal has a good dustproof effect, but with a contact pressure, the friction torque increases slightly. Non-contact seal to avoid friction torque, but the dust effect is slightly worse.
 
(4) regularly check the bearing. Should check the screw connection and the bed connection is loose, support the bearing is damaged. If the problem should be tightened loose parts and replace the bearing.
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