Assembly of a part that has no plastic domain
AssigneeETA SA Manufacture Horlogere Suisse
InventorsThierry Conus, Marco Verardo, Igor Saglini, Frederic Kohler
Life of this patent
Estimating the term…
Abstract
An assembly of a member, made of a first material in an aperture of a part, made of a second material having no plastic domain, using an intermediate part made of a third material, mounted between the member and the part. The intermediate part includes a hole for receiving the member. The part includes pierced holes forming a deformation mechanism distributed around the aperture thereof. The elastically and plastically deformed intermediate part radially grips the member and stresses the elastic deformation mechanism of the part so as to secure the assembly in a manner that is not destructive for the part. Such an assembly can for example be used in the field of timepieces.
Claims20
A method of assembling a member made of a first material in a part made of a second material, the second material being a ceramic or a silicon-based material, the method comprising:
- a) forming the part with a solid central region including an aperture and then piercing holes in the solid central region in a circular pattern around the aperture to form elastic deformation means;
- b) inserting an intermediate part, made of a third material and including a hole, into the aperture without any stress;
- c) introducing the member into the hole of the intermediate part without any stress,
- d) elastically and plastically deforming the intermediate part by moving two tools towards each other axially above and below the intermediate part so as to exert a radial stress against the member and against a wall of the part surrounding the aperture by stressing the elastic deformation means of the part and to secure the assembly in a manner that is not destructive for the part.
A method of assembling a member made of a first material in a part made of a second material, the second material being a ceramic or a silicon-based material, the method comprising:
- a) forming the part with an aperture and pierced holes distributed around the aperture intended to form elastic deformation means;
- b) inserting an intermediate part, made of a third material and including a hole, into the aperture without any stress;
- c) introducing the member into the hole without any stress;
- d) elastically and plastically deforming the intermediate part by moving two tools towards each other axially above and below the intermediate part so as to exert a radial stress against the member and against the wall of the part surrounding the aperture by stressing the elastic deformation means of the part and to secure the assembly in a manner that is not destructive for the part,
- wherein, in c), a distance between the member and an internal section of the intermediate part is substantially 10 μm.
A method of assembling a member made of a first material in a part made of a second material, the second material being a ceramic or a silicon-based material, the method comprising:
- a) forming the part with an aperture and pierced holes distributed around the aperture intended to form elastic deformation means;
- b) inserting an intermediate part, made of a third material and including a hole, into the aperture without any stress;
- c) introducing the member into the hole without any stress;
- d) elastically and plastically deforming the intermediate part by moving two tools towards each other axially above and below the intermediate part so as to exert a radial stress against the member and against the wall of the part surrounding the aperture by stressing the elastic deformation means of the part and to secure the assembly in a manner that is not destructive for the part,
- wherein, in b) to d), the intermediate part is held in the aperture via one of the two tools.
Dependencies are inferred from the claim text.