| 摘要 |
A method of forming a one-piece vehicle wheel disc and rim segment from a circular blank which includes the steps of clamping the circular blank in a spinning chuck having a mandrel with an outer surface that corresponds to the final desired geometric contour of the rim portion of the disc and rim segment. The periphery of the circular blank is then subjected to a draw spinning operation wherein a first spinning roller is cycled through a number of passes across the blank while the blank is spun by the chuck, and with the drawn portion of the blank being spaced from and unsupported by the mandrel surface. |
