Process and mold for producing ferromagnetic cores of...

H - Electricity – 02 – K

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H02K 15/02 (2006.01) H02K 1/14 (2006.01)

Patent

CA 2758405

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.

L'invention porte sur un procédé et sur un moule ébaucheur pour la production d'un noyau ferromagnétique pour moteurs électriques formé par une pluralité de segments. Les tôles magnétiques sont ébauchées à partir d'une feuille de matériau ferromagnétique et empilées dans une chambre d'accumulation du moule ébaucheur, le long de laquelle elles avancent jusqu'à ce qu'un segment constitué par un empilement comprenant un nombre prédéfini de tôles magnétiques soit formé, qui est mécaniquement rattaché à un segment adjacent, pour ainsi former une séquence rectiligne de segments. Les segments sont articulés l'un à l'autre avec possibilité de rotation mutuelle pour permettre à la séquence de segments d'être amenée de l'état rectiligne à une configuration circulaire fermée.

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