METHOD FOR MANUFACTURING A HAIRSPRING WITH A PREDETERMINED STIFFNESS BY LOCALISED REMOVAL OF MATERIAL

The invention relates to a method for fabrication of a balance spring of a predetermined stiffness comprising the steps of fabricating a balance spring in dimensions of increased thickness, determining the stiffness of the balance spring formed in step a) in order to remove, locally, a volume of mat...

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Bibliographische Detailangaben
Hauptverfasser: KOHLER, Frédéric, BUCAILLE, Jean-Luc, HUNZIKER, Olivier
Format: Patent
Sprache:eng ; fre ; ger
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Beschreibung
Zusammenfassung:The invention relates to a method for fabrication of a balance spring of a predetermined stiffness comprising the steps of fabricating a balance spring in dimensions of increased thickness, determining the stiffness of the balance spring formed in step a) in order to remove, locally, a volume of material, in order to obtain the balance spring having the dimensions necessary for said predetermined stiffness.