Influence Law of Different Factors on the Roll Forming Precision of Aluminum Alloy Cylinder with Variable Curvature Section

Abstract

High precision roll forming of cylinders with variable curvature section is a technical challenge for high-performance manufacturing of oil and gas transportation tanks. In this work, the large cylinder with variable curvature section was taken as the object of study, a four-roll roll bending FE (Finite Element) model of large cylinder with variable curvature section was established to investigate the influence of driving roll speed on the precision of cylinder forming quality, and the influence of adjacent arc segment size on the precision of cylinder roll forming was obtained by the segmental forming simulation of the cylinder. The results show that the forming radius increased sharply after the speed exceeded the threshold value and the main factors of roll forming radius error is the radius and length of the front arc, the radius and length of the middle arc, and the radius and length of the rear arc.