METHOD FOR EVALUATING THE INSTALLATION OF BLIND RIVETS, METHOD AND SYSTEM FOR INSTALLING BLIND RIVETS, METHOD AND SYSTEM FOR OBTAINING A PATTERN, AND AIRCRAFT

摘要

A method for evaluating installation of blind rivets including measuring the “cycle time” represented “y₀”, transmitting sound waves through the blind rivet installed in the structure, measuring the “travel time” represented “x₀”, relating “travel time” and “cycle time”, and obtaining a pair of times (x₀,y₀), providing a time relation pattern establishing a borderline between an area of suitable rivets and an area of unsuitable rivets, the border represented y=f(x), so for cycle time values greater than y=f(x), it is considered a “suitable area”, for cycle time values less than y=f(x), it is considered an “unsuitable area”, representing pair (x₀,y₀) in the graphic representation and verifying if the value of y₀ is greater or less than the value of y=f(x0), classifying installation of the rivet as suitable or unsuitable according to the verification.