Process and mold for producing ferromagnetic cores of electric motors
AssigneeErnesto Malvestiti S.P.A.
InventorSergio Confalonieri
Life of this patent
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Abstract
A process and a blanking mold are described for the production of a ferromagnetic core for electric motors formed by a plurality of segments, The laminations are blanked from a sheet of ferromagnetic material and stacked in an accumulation chamber of the blanking mold, along which they advance until a segment constituted by a stack having a preset number of laminations is formed, which is mechanically connected to an adjacent segment, thereby forming a rectilinear sequence of segments, The segments are hinged to each other with the possibility of mutual rotation to allow the sequence of segments to be brought from the rectilinear condition to a closed circular configuration.
Claims16
A process for the production of a ferromagnetic core for electric motors formed by a plurality of segments, the process comprising the steps of:
- i) blanking a plurality of laminations in a blanking mold from a sheet of ferromagnetic material, at least part of said laminations comprising at least one protruding engagement portion and at least one concave engagement portion having mutually complementary shapes to allow engagement with the respective engagement portions of adjacent laminations;
- ii) progressively stacking said laminations in an accumulation chamber of said blanking mold;
- iii) forming a plurality of segments of said ferromagnetic core constituted by stacks having a preset number of stacked laminations, characterized by comprising the step of:
- iv) forming in said blanking mold a rectilinear sequence of adjacent segments mechanically connected to each other by coupling the protruding engagement portions of the laminations of a segment with the concave engagement portions of the laminations of another adjacent segment.
A blanking mold for the production of a ferromagnetic core for electric motors formed by a plurality of segments, comprising:
- a) at least one blanking station for blanking a plurality of laminations from a sheet of ferromagnetic material, at least part of said laminations comprising at least one protruding engagement portion and at least one concave engagement portion having mutually complementary shapes to allow engagement with the complementary engagement portions of adjacent laminations, and
- b) at least one stacking station comprising an accumulation chamber for progressively stacking said laminations and for forming a plurality of segments of said ferromagnetic core constituted by stacks having a preset number of stacked laminations,
- characterized by comprising at least one forming station for forming in said blanking mold a rectilinear sequence of adjacent segments mechanically connected to each other by coupling the protruding engagement portions of the laminations of a segment with the concave engagement portions of the laminations of another adjacent segment.
A ferromagnetic core for electric motor formed by a plurality of segments mechanically coupled to each other, wherein each segment is formed by a stack of a plurality of laminations, and wherein at least part of said laminations comprises at least one protruding engagement portion and at least one concave engagement portion having mutually complementary shapes to allow engagement with the complementary engagement portions of adjacent laminations, characterized in that it is made in a blanking mold in the form of a rectilinear sequence of adjacent segments mechanically connected to each other by coupling the protruding engagement portions of the laminations of a segment with the concave engagement portions of the laminations of another adjacent segment.
Dependencies are inferred from the claim text.