Crankshaft swing rolling device

The invention provides a crankshaft swing rolling device, which comprises an upper rolling head and a lower rolling head, wherein the upper rolling head comprises an upper rolling body and an upper pressure head guide wheel, an upper pressure head idler wheel retainer is arranged on the upper rolling body, a group of upper pressure head idler wheels is arranged between the upper pressure head idler wheel retainer and the upper pressure head guide wheel, the lower rolling head comprises a lower rolling body and a lower pressure head guide wheel, a lower pressure head idler wheel retainer is arranged on the lower rolling body, lower pressure head idler wheels are arranged between the lower pressure head idler wheel retainer and the lower pressure head guide wheel, and the swing rolling angle between the upper and lower pressure head idler wheels and a crankshaft is alpha. The crankshaft rotates to drive the upper pressure head idler wheels and the two groups of lower pressure head idler wheels to perform swing rolling in an angle range of 45-60 degrees, the number of the idler wheels is six, rolled circular beads are bright and full, a plastic deformation zone is increased, the rolling efficiency is high, the rolling process is stable, and the fatigue strength of the rolled crankshaft is improved by more than 80%.