External piece for a timepiece and system of manufacturing the same

摘要

An external piece for a time piece and a method of manufacturing the same, including a top surface and a bottom surface. At least one of the faces includes a longitudinal curvature and a transverse curvature that are different.

主权项

1. A system of manufacturing an external piece for a timepiece comprising:
a securing device including a drum, rotatably mounted along a first axis, and an inner circumferential wall or an outer circumferential wall of the drum carrying at least one blank of the piece; and a machining device comprising an abrasive structure rotatably mounted along a second axis and configured to machine the at least one blank to form a first curvature, wherein the machining device further includes a mechanism to move the second axis so that the machining device is movably mounted along a curved directrix to selectively form a second curvature in the at least one blank while the machining device is machining the first curvature, and wherein the first axis and the second axis are perpendicular so that machining lines intersect.