Research on Contact Deformation and Influencing Factor of Ball Screw

摘要

It was calculated contact deformation of ball screw respectively by hertz theory and finite element method,and analyzed the influencing factors.It is found that as the gradually increasing of ball screw load,axial deformation is also increasing gradually,and its deformation gradually smooths.As the increasing of lead angle,deformation of ball screw is gradually decreasing.As the increasing of contact angle,deformation of ball screw is gradually decreasing.Finite element calculated results are in good agreement with the theoretical results,and the error is gradually increasing with the increase of the nut load.The reason is that turning of ball is not fixed in the roller path,and along with the increase of the load,the contact point position is constantly changing among ball,leading screaw and nut.