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Method for evaluating the installation of blind rivets, method and system for installing blind rivets, method and system for obtaining a pattern, and aircraft

A technology of blind rivets and rivets, which is applied in the aircraft field and can solve problems such as rivet defects

Inactive Publication Date: 2013-09-25
AIRBUS OPERATIONS GMBH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] These methods based exclusively on the monitoring of the process do not focus on errors due to processing steps after the riveting itself, which are necessary to build the riveted structure and can cause defects in the rivet

Method used

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  • Method for evaluating the installation of blind rivets, method and system for installing blind rivets, method and system for obtaining a pattern, and aircraft
  • Method for evaluating the installation of blind rivets, method and system for installing blind rivets, method and system for obtaining a pattern, and aircraft
  • Method for evaluating the installation of blind rivets, method and system for installing blind rivets, method and system for obtaining a pattern, and aircraft

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Embodiment Construction

[0069] The present invention relates to a method for assessing the installation of blind rivets for use in joining closed structures or structures for which it is complex and costly to access "unexposed faces" to check that the rivets have been installed correctly. Examples of blind rivets are shown in figure 1 middle. In this figure a blind blind rivet with a countersunk head can be seen. The figure shows the different parts of the rivet: the stem 1 , the mounting nut 2 , the breaking notch 3 , the cut-off point 4 and the bushing 5 . figure 2 shows the installation in a structure of figure 1 rivet, where the bushing 5 is folded and can be seen abutting the structure to prevent the rivet from coming out. The length of the rivet is expressed as less than figure 1 Medium length, because rod 1 breaks.

[0070] A non-invasive method for evaluating the installation of rivets

[0071] In one embodiment, a non-invasive method for evaluating the installation of a blind rivet ...

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Abstract

The invention provides a method for evaluating the installation of blind rivets, a method and system for installing blind rivets, a method and system for obtaining a pattern, and an aircraft. The method is presented for evaluating the installation of blind rivets comprising the steps of: measuring the 'cycle time' (8) defined as the installation time of the rivet represented as 'y 0 '; transmitting sound waves through the blind rivet installed in the structure, measuring the 'travel time' (7) represented as 'x 0 '; relating the 'travel time' and the 'cycle time', and obtaining a pair of times (x 0 , y 0 ); providing a time relation pattern establishing a borderline between an area of suitable rivets and an area of unsuitable rivets, where the border is represented as y=f(x), such that for cycle time values greater than y=f(x), it is considered a 'suitable area'; classifying the installation of the rivet as suitable or unsuitable according to the verification, such that if y0>f(x0) then it is considered a suitable installation.

Description

technical field [0001] The present invention relates to methods and systems for evaluating the installation of blind rivets used in joining structures, systems and methods for generating a model relating installation "cycle time" and "travel time", and structures comprising installations with such systems s plane. Background technique [0002] Blind rivets are widely used in closed aerospace structures where access to one side of the joint is so restricted that it is impossible to access or even view the rear portion of the joint. As a result, the rivet quality assessment process is performed only from the access side ('exposed side'). [0003] When installing the rivet, the blind rivet is inserted into the corresponding hole, and the riveting process is performed until the shank of the rivet breaks. However, since it is impossible to access the blind (or unexposed) side, it is not possible to perform a complete quality control of the connection. [0004] When the choice ...

Claims

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Application Information

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IPC IPC(8): B21J15/28
CPCG01N29/07B21J15/28B21J15/285G01N29/348G01N2291/2691
Inventor 德西雷·古斯曼拉瓦尼略胡安·拉蒙·阿斯托加拉米雷斯雅维耶·卡马舒德米格尔阿古斯丁·萨恩斯费尔南德斯马里亚·阿松齐翁·里韦罗拉斯特雷罗
Owner AIRBUS OPERATIONS GMBH
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