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Part for clock movement

A watch movement and outer surface technology, applied in the field of balance shaft, fork shaft and escapement gear shaft, non-magnetic pivoting spindle, which can solve the problems of difficult machining pivoting spindle, high cost, expensive alloy, etc.

Active Publication Date: 2018-01-26
NIVAROX FAR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these alloys may show difficulty in machining for pivoting mandrels
Furthermore, these alloys are relatively expensive due to the high cost of nickel and cobalt

Method used

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  • Part for clock movement
  • Part for clock movement
  • Part for clock movement

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Embodiment Construction

[0029] In this specification, the term "non-magnetic" refers to a paramagnetic or diamagnetic or antiferromagnetic material having a magnetic permeability lower than or equal to 1.01.

[0030] An alloy of an element is an alloy comprising at least 50% by weight of that element.

[0031] The present invention relates to a component for a timepiece movement, and in particular to a non-magnetic pivoting arbor for a mechanical timepiece movement.

[0032] The invention will be described below with reference to the application of a non-magnetic balance shaft 1 . Of course, other types of timepiece pivot arbors are also conceivable, such as a timepiece wheel set arbor, typically an escapement pinion or a fork. Such a component has a body with a diameter of preferably less than 2 mm and a pivot with a diameter of preferably less than 0.2 mm, with an accuracy of a few micrometers.

[0033] refer to figure 1 , which shows a pendulum 1 according to the invention comprising a pluralit...

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Abstract

The invention relates to a pivot axis for a watch movement. The pivot axis comprises at least one pivot (3) made of a first non-magnetic metal material (4) at at least one of its ends in order to limit its sensitivity to magnetic fields. At least the outer surface of said pivot (3) is covered with a layer (5) of a second material selected from the group consisting of Ni and NiP, and preferably chemical NiP. The invention relates to the field of watch movements.

Description

technical field [0001] The present invention relates to a component for a timepiece movement, and in particular to a non-magnetic pivoting arbor for a mechanical timepiece movement, and more particularly to a non-magnetic balance, fork and escapement pinion. Background technique [0002] Manufacturing pivoting arbors for timepieces involves performing a bar turning operation on a hardenable steel bar to define various working surfaces (bearing surfaces, shoulders, pivots, etc.) and then subjecting the bar turned arbor to heat treatment , said heat treatment comprising at least one hardening operation to increase the hardness of the mandrel and one or more tempering operations to increase the toughness of the mandrel. The heat treatment operation is followed by an operation of rolling the pivot of the mandrel, which includes polishing the pivot to the required dimensions. The stiffness and roughness of the pivot portion are further improved during the rolling operation. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G04B1/16G04B13/02G04B15/14
CPCG04B13/026G04B1/16G04B15/14G04B13/02G04B17/32G04B43/007G04B29/00G04B13/022
Inventor A·弗辛格C·沙邦M·韦拉尔多
Owner NIVAROX FAR
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