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Part for clock movement

A clock movement and outer surface technology, applied in the field of fork shaft, escapement pinion, non-magnetic pivoting mandrel and pendulum shaft, can solve the problems of difficult machining of pivoting mandrel, high cost, expensive alloy, etc. To achieve the effect of good chemical resistance, improved friction performance, good mechanical resistance

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
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Embodiment Construction

[0033] 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.

[0034] An alloy of an element is an alloy comprising at least 50% by weight of that element.

[0035] 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.

[0036] 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.

[0037] refer to figure 1 , which shows a pendulum 1 according to the invention comprising a pluralit...

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PUM

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Abstract

The invention relates to a pivot axis (1) for a watch movement. The pivot axis includes at least one pivot (3), which is made of a first non-magnetic metal material (4), at at least one of its ends inorder to limit its sensitivity to magnetic fields, at least the surface external of said pivot (3) being covered with a first layer (5) of a second material selected from the group comprising Ni, NiBand NiP, and preferably NiP chemical. At least the first layer (5) of the second material is at least partially covered with a second layer (6) of a third material selected from the group consistingof gold, silver, copper, platinum, rhodium, palladium and their alloys. 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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