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Pivot mandrel of adjustment member

A technology of adjusting parts and pivoting, applied in mechanically driven clocks, usage of anti-magnetic alloys, repair tools, etc., can solve problems such as tarnishing and corrosion

Active Publication Date: 2021-04-02
NIVAROX FAR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this alloy is prone to corrosion, tarnishing, and therefore has limited wear resistance

Method used

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  • Pivot mandrel of adjustment member
  • Pivot mandrel of adjustment member

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Embodiment Construction

[0042] In this specification, the term "non-magnetic" alloy refers to a paramagnetic or diamagnetic or antiferromagnetic alloy having a magnetic permeability less than or equal to 1.01.

[0043] The term "chip machining" refers to any shaping / shape forming operation performed by a desired material removal process to bring the dimensions and surface finish of a component within given tolerances. Such operations are for example profiling, milling or any other technique known to those skilled in the art.

[0044] The present invention relates to a component for a timepiece movement, and more particularly to a non-magnetic timepiece component, such as a pivoting arbor, for a mechanical timepiece movement.

[0045] Below will be in figure 1The invention is described in the application of the non-magnetic balance shaft 1 shown. Of course, other types of timepiece pivot arbors are conceivable, such as a clock wheel arbor, typically an escape pinion, or a pallet arbor. Members of t...

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Abstract

The invention relates to a timepiece component for a timepiece movement, and in particular to a pivot mandrel of an adjustment member of a mechanical timepiece movement. The pivot mandrel is made of an alloy comprising the following components by weight: 25% to 55% of palladium; 25% to 55% of silver; 10% to 30% of copper; 0.5% to 5% of zinc; two elements of gold and platinum with a total content of 15% to 25%; 0% to 1% of one or two elements selected from the group consisting of boron and nickel; 0% to 3% of one or two elements selected from rhenium and ruthenium; no more than 0.1% of one or more elements selected from iridium, osmium and rhodium; and no more than 0.2% of other impurities, the sum of the amounts of the components being set to no more than 100%. The invention also relates to a method for producing a timepiece component for a timepiece movement.

Description

technical field [0001] The present invention relates to a component for a watch movement, in particular to a non-magnetic watch component for a mechanical watch movement, in particular to a non-magnetic balance shaft, pallet shaft and escapement pinion. Background technique [0002] The manufacture of a timepiece component comprising at least one part in the form of a turned part (e.g. a timepiece pivot arbor) involves performing a chip machining operation (e.g. profile turning) on ​​a hardenable stainless steel bar to define the respective effective surface (bearing surface, shoulder parts, pivots, etc.), the profile-turned mandrel is then subjected to a heat treatment comprising at least one hardening operation to increase the hardness of the member and one or more operations to increase the toughness of the member a tempering operation. In the case of pivoted mandrels, the heat treatment operation may be followed by a rolling / rolling operation on the pivot of the mandrel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G04B13/02
CPCG04B13/02G04B43/007C22C5/06C22C5/02C22C5/00C22C5/04C22C30/02G04B15/14G04D3/0089G04D3/0254
Inventor C·沙邦
Owner NIVAROX FAR
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