Feasibility study on straightening process of rotating bending for small and medium-sized shaft and pipe parts

Shaft and pipe parts are an important steel product. Due to various factors, their straightness often exceeds the standard, which seriously affects their performance and life. In view of the limitations of the existing straightening processes, this paper proposes a rotating bending straightening process. The two ends of the workpiece are clamped by the fixtures, and the bending and rotation are realized by controlling the movement of the fixtures. In the process, the workpieces undergo multiple reciprocating bending and is finally straightened. The feasibility of the process is verified by numerical simulation and experiments. The deflection of the shaft with an initial deflection of 1 mm is less than 0.1 mm after straightening. This process can improve the straightening efficiency and accuracy, and is suitable for mass straightening.