The contact angle meter is also larger than before. Therefore, under the same axial load, a larger radial load will be generated, which will increase the pressure of the extruded ball, thereby reducing the life of the screw. This should be paid attention to. If you handle these problems correctly according to the solutions, you can solve the problems.
When the spiral raceway of the nut in the ball screw loses accuracy due to severe wear, the raceway usually needs to be ground to restore the accuracy. The lead screw and the nut should be ground at the same time, all the balls are replaced after grinding, and the pre-tightening adjustment is carried out after assembly. Before grinding, the profile parameters of the normal section of the thread raceway should be corrected and calculated. Regardless of whether it is a single-arc or double-arc raceway, a double nut structure is usually used after grinding to help eliminate axial clearance and preload. As the radius of the arc of the raceway increases after grinding, the R/rb ratio also increases, and its carrying capacity decreases.
