Analysis and elimination of the cross-spring flexural pivot's warpage

In order to reveal the warping deformation mechanism of the flexible pivot, a model of the cross-spring flexural pivot was developed. And two special cases when spring crossing angle is 90° and radial load is zero, were analyzed. The existence of warping deformation in such flexible pivot was verified by ANSYS finite element analysis (FEA). Finally, using springs' symmetric cross layout, a feasible method which could eliminate the warping deformation was put forward. Numerical simulation and experimental results all shows that the deformation exists in the functional direction only, and warping deformation is restrained completely when the flexural pivot's springs are symmetric crossed.