Method for polishing a timepiece stone, and equipment for carrying out said method
AssigneeLa Pierrette S.A.
InventorsMarco Pavone, Cédric Moreaux
Life of this patent
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Abstract
The method is for producing a pivot stone (1) for a timepiece movement (100), the pivot stone (1) having a pivot hole (5) that has a first axis (A1) and is able to pivot a timepiece component (98), such as a timepiece axis, or to pivot about a timepiece component (98), involves a first polishing in which: (i) free abrasive particles (21) are used, in particular diamond particles, which roll between the surface (6) of the pivot hole (5) to be polished and a polishing support (20), such as a wire (20), and/or (ii) the pivot stone (1) is rotated about the first axis (A1) relative to a polishing support (20) that is held against the surface (6) of the pivot hole (5) to be polished.
Claims20
A process for producing a pivot jewel for a timepiece movement, the pivot jewel comprising a pivot hole having a first axis and being capable of pivoting a timepiece component or capable of pivoting about a timepiece component, the process comprising a first polishing, in which:
- (i) use is made of free abrasive particles rolling between a surface of the pivot hole to be polished and a polishing support, and/or
- (ii) the pivot jewel is driven in a rotational movement about the first axis relative to a polishing support drawn back toward the surface of the pivot hole to be polished.
A machine for polishing pivot holes of pivot jewels for a timepiece movement, the pivot jewels having pivot holes oriented along a first axis, the machine comprising:
- a drum rotationally driven about a second axis,
- the drum having a slot that forms a helix around the drum for driving the pivot jewels and for holding the pivot jewels in a position so that the first axis is perpendicular to an osculating plane of the helix at a contact between the pivot jewel and the slot.
Dependencies are inferred from the claim text.