In order to solve the problem of processing difficulties in conical slender multi-diameter shaft turning,the three-roll cross wedge rolling process of conical slender multi-diameter shaft used as removable wall bolt was analyzed.Through the theoretical calculation of axial rolling force and finite element analysis,the each primary wedge position,the suitable broadening angle β,the wedge number and the blank size in non-symmetry axis rolling by three-roll cross wedge rolling mill were obtained.The distributi...