In order to improve the accuracy of the air duct rotating bending fatigue life test, basing on the related standards of aviation ministry and other types of rotary bending fatigue machines tailstock home and abroad, a 4-DOF adjusting device, which can move along X and Y axis in the horizontal plane and along Z axis in the vertical plane and rotate around Z axis, is designed. The tailstock can realize the experiment of different diameter and bending Angle rotating bending fatigue experiment was carried out at the same time. It improves the test efficiency, enhances the universality and plays a leading role for the design of the domestic similar products.
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