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Assembly of a part that has no plastic domain

By inserting metal components into silicon-based components and applying radial elastic deformation, the problem of fracture and poor bonding during the assembly of silicon-based components and metal components is solved, achieving an efficient and low-cost fixing effect, which is suitable for a variety of industrial applications.

Active Publication Date: 2012-07-11
NIVAROX FAR SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the document proposes the use of faceting techniques, which can lead to non-uniform stress distribution on the silicon and also cause silicon parts to break

Method used

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Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0031] As stated above, the present invention relates to a component and a method of assembling the component for combining brittle materials (ie materials without plastic domains such as single crystal silicon-based materials) and ductile materials (such as metals or metal alloys) into one .

[0032] This component is designed for applications within the field of horology. However, other fields are also very well suited, for example aviation, jewellery, the automotive industry or tableware, for example.

[0033] In the field of horology, such components are required due to the increasing importance of brittle materials such as those based on silicon, quartz, corundum or more generally ceramics. As an example, it is conceivable to construct balance springs, balance wheels, pallet forks, bridges or even wheel sets such as escape wheels entirely or partly from materials based on brittle materials.

[0034] However, the usual steel mandrels for which the machining technology ha...

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PUM

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Abstract

The invention relates to an assembly of a part that has no plastic domain. A method of assembling a member (5, 15) made of a first material in a part (3) made of a second material having no plastic domain, includes forming the part (3) with an aperture (4), inserting a radially flared portion of the member (5, 15) into the aperture (4), without any stress, and elastically and plastically deforming the flared portion of the member in the aperture (4) by moving two tools (11, 13, 21) towards each other axially, respectively on the top and bottom parts of the flared portion, so as to exert a radial stress (B) against the wall of the part (3) surrounding the aperture (4), causing the elastic deformation of the part, to secure the assembly in a manner that is not destructive for said part. The member can be a timepiece.

Description

technical field [0001] The invention concerns the assembly of parts made of materials without plastic domains to elements made of different types of materials. Background technique [0002] Existing components, including silicon-based components, are usually fixed by gluing. This type of operation requires very delicate applications, which makes it expensive. [0003] EP Patent No. 2107433 discloses a first silicon-based part assembled on an intermediate metal part, and subsequently mounting the whole assembly on a metal mandrel. However, the examples given in this document are unsatisfactory and either cause breakage of the silicon-based components during assembly, or do not bond the components to each other well enough. [0004] In fact, in this document, one end of the intermediate part is bent over the silicon part to generate a purely axial stress, which leads to a fracture of the silicon part. Furthermore, this document proposes the use of faceting techniques, which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G04B17/34G04B13/02G04B15/14G04D3/00B81C1/00
CPCG04D3/04G04B17/345G04B13/022G04B17/325G04B13/026G04B15/14G04D1/0042B21K25/00F16B17/006G04B17/06G04B17/066Y10T29/49938Y10T29/49934Y10T29/49581
Owner NIVAROX FAR SA
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