| 摘要 |
A method and device of induction hardening of a circular mechanical component part (3), where at least four inductors (5-8) are arranged, in pairs, in tandem with respect to an annular surface (2) to be hardened, a first inductor (5) of a first pair (15) being operatively associated with a first cooling shower (16) arranged immediately adjacent to a second cooling shower (18) operatively associated with a first inductor (7) of a second pair (17). The inductors and the corresponding showers of each pair (15,17) are fed and rotated with respect to one another and to the annular surface (2) to be hardened, so that the second pair (17) of inductors leaves the first pair (15) from the side of the first shower (16) to be repositioned in tandem adjacent to the first pair (15) on the opposite side; at this point, at least two inductors (6,8) are no longer fed and are moved away from the surface (2) to be hardened, while continuing the relative rotation of the other inductors; finally, all the inductors (7,8) along with the first and second showers (16,18) are no longer fed and are moved away from a portion (200) of the surface to be hardened on which they insist at that moment, by replacing them with a third shower (20) by means of which such a portion (200) is cooled. |
