How Does A Ball Screw Reduce The Effect Of Thermal Expansion?

Ball screw is the most commonly used transmission element in tool machinery and precision machinery. Its main function is to convert rotary motion into linear motion, or convert torque into axial repetitive force, with high precision, reversibility and high Efficiency features. Ball screws are widely used in CNC machine tools, which can greatly improve the sensitivity and positioning accuracy of the feed system. The ball screw pair at work is constantly affected by the cutting force. The ball screw pair itself will be squeezed to generate heat, and the temperature of the ball screw will continue to rise until it is balanced with the outside temperature.

The ball screw will increase the lead under the action of thermal expansion, which will affect the positioning accuracy. To reduce the effect of thermal expansion, the ball screw is pre-tensioned.