| 摘要 |
The present invention relates to a method of producing special wheel rims of the slant shoulder type for trucks, said rims having an erected wheel flange joining the slant shoulder of the rim on the one side, and a recessed spring ring groove on the other side of the rim, from a sheet metal shell blank, whereby the wheel flange is expanded by a spinning operation and the spring ring groove on the other side is recessed by a spinning operation followed by an erection or raising of the edge. |
