Study on Flexible Rolling Technology of Aluminum Alloy after Friction Stir Welding

The flexible rolling process was introduced in view of the shortcomings of rolling device after friction stir welding of aluminum alloy. The flexible shaft handle with a built-in spring was used to replace the original rigid shaft handle to increase the flexibility of rolling device, and the process verification was carried out. The experimental results show that the structure of flexible rolling device is reasonable and feasible. Compared with the rigid rolling process, the flexible rolling process has the characteristics of stable rolling process, high efficiency and good joint performance. The fluctuation value of flexible rolling pressure is only 1/10 of that of rigid rolling, and the flexible rolling process is more stable, the flexible rolling time is 51.7% of the rigid rolling time. Through the visual inspection and X-ray inspection, the flexible and rigid rolling joints meet the standards of grade I, but the tensile strength of the flexible rolling joint is slightly higher than that of the rigid rolling joint.