Process for checking that full threads are engaged in tightening and assembly

Patent metadata

Field	Value
Publication number	US-9500544-B2
Application number	US-201514978711-A
Country	US
Kind code	B2
Filing date	Dec 22, 2015
Priority date	Dec 23, 2014
Publication date	Nov 22, 2016
Grant date	Nov 22, 2016

Abstract

A process for checking when tightening a threaded fastener that it has been tightened on the complete threads of the fastener. In order to do this the process comprises detecting different gradients in a tightening graph representing torque as a function of another parameter and comparing each gradient with predetermined values. According to the portions of graph detected and their gradient values it is possible to determine whether tightening is correct and has taken place on the complete threads of the fastener, or if not it is possible to identify a cause of failure.

First claim

The invention claimed is:

1. A process for checking that complete threads are engaged when tightening an assembly comprising at least a first part and a second part and a threaded fastener, comprising a first component and a second component, the process comprising at least the following stages:
a stage of measuring at least one torque from a coupling torque and a reaction torque in the threaded fastener while keeping one of the components of the threaded fastener fixed;
a stage…

Assignees

• Airbus Operations Sas

Inventors

• Morgue Patricia
• Paredes Manuel
• Gourdon Sophie
• Dols Simon

Classifications

• F16B31/02

  Mechanical Engineering · mapped topic

• B25B23/147

  Operations & Transport · mapped topic

• G01L5/26

  Physics · mapped topic

• G01L5/24 Primary

  Physics · mapped topic

• B25B23/1425

  Operations & Transport · mapped topic