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Components for clock movements

A watch movement and outer surface technology, applied in the fields of balance shaft, fork shaft, escapement gear shaft, and non-magnetic pivoting spindle, which can solve the problems of difficult machining pivoting spindle, high cost, expensive alloy, etc. Achieve good chemical resistance, improve friction performance, good mechanical resistance

Active Publication Date: 2021-01-08
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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  • Components for clock movements
  • Components for clock movements

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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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Abstract

The invention relates to a pivot arbor (1) for a timepiece movement, comprising at least one pivot (3) at at least one of its ends, the pivot (3) being composed of Made of a first non-magnetic metallic material (4) so ​​as to limit its susceptibility to magnetic fields, at least the outer surface of said pivot (3) is covered with a first layer (5) of a second material is selected from the group comprising Ni, NiB and NiP and is preferably chemical NiP. At least said 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 consisting of gold, silver, copper, platinum, rhodium, palladium and alloys thereof group. 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 Patents(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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