Method for producing an attachment element

Inactive Publication Date: 2014-05-08
ERIS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention is about a new type of knob that can be used to securely attach parts together. The knob is made by deforming a shank and has a maximum thickness that is 0.45 times the diameter of the shank. This thickness and diameter combination makes the knob strong enough to meet fatigue and tearing strength requirements. The knob is made from a specific combination of elements like chromium, copper, iron, magnesium, manganese, silicon, titanium, zinc, and zirconium. This combination of elements helps achieve the desired mechanical properties for a fastener while preventing cracks caused by copper content. The manufacturing method of this rivet also prevents the presence of cracks and ensures that it meets fatigue and tearing strength requirements.

Problems solved by technology

Nonetheless, the fatigue and tearing strength criteria applicable to rivets are increasingly stringent.
However, while one solution to meet these criteria lies in increasing the rivet dimensions, such an increase involves the drawback of the appearance of cracks.

Method used

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  • Method for producing an attachment element

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Embodiment Construction

[0004]For this reason, the applicant conducted research aimed at providing a solution for the most stringent criteria in respect of the fatigue and tearing strength criteria, on one hand, and at solving the technical problem of the appearance of cracks, on the other.

[0005]This research resulted in the design of a method for manufacturing, using a metal wire, a fastening element such as that having a shank wherein a first end is equipped with a head, the second end being intended to be deformed to act as a knob forming a bearing surface to be positioned facing that formed by the head, said shank having a nominal diameter. This fastening element is designed such that the minimum length of the shank intended to be deformed to act as the knob is not less than 1.25 times the nominal diameter of the shank.

[0006]The invention is remarkable in that it consists of[0007]obtaining, for the metal wire, a material grain adopting a size of 6 or finer according to the criteria defined by the ASTM ...

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Abstract

The invention relates to a method for producing an attachment element (R) comprising a shaft (100) having a first end provided with a head (200) and a second end that is intended to be deformed in order to form a button (300) providing a bearing surface opposite the surface formed by the head (200), said shaft (100) having a nominal diameter (D). The method is characterised in that the element is sized such that the minimum length (L) of the shaft (100) to be deformed to form the button (300) is no less than 1.25 times the nominal diameter (D) of the shaft (100). The invention is suitable for use in the production of attachment elements, such as rivets.

Description

FIELD OF THE INVENTION[0001]The present invention relates to the field of fastening elements such as rivets and particularly to adaptations for enhancing the mechanical features thereof.DESCRIPTION OF THE PRIOR ART[0002]There are a plurality of rivets and manufacturing methods in the prior art liable to have the mechanical features sought. Nonetheless, the fatigue and tearing strength criteria applicable to rivets are increasingly stringent.[0003]However, while one solution to meet these criteria lies in increasing the rivet dimensions, such an increase involves the drawback of the appearance of cracks.DESCRIPTION OF THE INVENTION[0004]For this reason, the applicant conducted research aimed at providing a solution for the most stringent criteria in respect of the fatigue and tearing strength criteria, on one hand, and at solving the technical problem of the appearance of cracks, on the other.[0005]This research resulted in the design of a method for manufacturing, using a metal wire...

Claims

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Application Information

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IPC IPC(8): B21K1/58
CPCB21K1/58B21J15/02F16B19/06
InventorAURIOL, PIERRE
OwnerERIS