Manufacturing method of a fan rotor for rotating electric machines, particularly for alternators for cars, and fan rotor obtained by such a method.

摘要

Method of manufacturing a fan rotor (19), in particular for rotating electric machines, the said fan rotor (19) having to comprise n fan blades (18), characterised in that it comprises the following operations: … …  - a metal band (10) of elongated shape is produced …  - the said metal band (10) is divided into 2n surfaces (11, 12) of quadrangular general shape …  - successively or simultaneously, one quadrangular surface (12) in two is folded with respect to their median line (13) constituted by the bisector of the angle (E) formed by the sides (22) of the said quadrangular surface (12). … …Application: motor vehicles. ……