As the saying goes, details determine the success or failure, so we should pay attention to the details in CNC processing to avoid problems. According to the information learned by the editor, the nut pair of ball screw in CNC machining center is a kind of rotating device with small motion friction and easy to eliminate rotation clearance. It has the advantages of small wear, high efficiency, high precision and low temperature rise. It has brought great help to the performance improvement of transmission system.
Do all ball screws of CNC machining center need pre tightening
The reason of preloading is to prevent the ball from slipping, but not all ball screws need preloading. The higher the preloading accuracy, the greater the load capacity. Specific or to see the needs of users to choose the level of pre tightening.
What are the preloading methods
- Double nut threaded pre tightening
The relative axial position of two nuts is adjusted by round nut, which is one of the pre tightening methods.
- Double nut gasket preloading
This method is simple and widely used. This is the way to add gasket between the double nuts. The manufacturer can adjust the preload according to the requirements of customers. It is very convenient to install and disassemble.
- Self preloading of single nut with variable lead
This pre tightening method is to produce a lead sudden change in a circle in the middle of the internal thread of the nut, so that the left and right ball can be preloaded by axial dislocation after assembly. CNC machining center ball screw nut pair to eliminate the axial clearance is mainly to improve the transmission accuracy and stiffness.
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