Theoretical analysis on springback of
L-section extrusion in rotary stretch bending process
L-section extrusion in rotary stretch bending process
(School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China)
Abstract: The theoretical analysis of springback in rotary stretch bending process of L-section extrusion was studied. The models for characterizing the springback angle after unloading were established based on the stress and strain distributions in the cross-section of the part. With the proposed model, analysis of the effect of pre-stretch force and post-stretch force on springback angle shows that springback decreases as the pre-stretch force or post-stretch force increases. Comparative study with experiments clearly demonstrates that the prediction of springback can resort to the current model without the loss of accuracy.
Key words: springback; rotary stretch bending; theoretical analysis