3. Applications and feedback

Ultrasonic-controlled clamping is used in a wide range of industrial sectors, including energy, automotive, rail, heavy industry and aeronautics. The need for safety and quality is growing in these sectors.

A few examples of applications

Tightening all screws on an ultrasonic assembly

This involves measuring tension independently of the tool used to tighten the bolts (screwdriver, torque wrench or hydraulic tensioner). During tightening, regardless of the tool used to tighten the bolts, attention is paid to monitoring the evolution of tension directly on the measuring device.
Long-term: check the tension present in the screws at all times. Follow the behavior of a screwed assembly over several years. This method is widely used in maintenance departments....

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Applications and feedback

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page Principle of the measurement method

Conclusions

Bibliography

(1) - BELAHCENE (F.) - Détermination des contraintes résiduelles superficielles par méthode ultrasonore. - - Thèse de doctorat, UTC, Compiègne, France (2000).
(2) - MURNAGHAN (D.) - Finite deformation of an elastic solid. - - John...

Standards and norms

Fastening elements – Torque/voltage tests – Amendment 1 - NF EN ISO 16047/A1 - 01-13
Éléments de fixation. Assemblages vissés. Conception, calcul et conditions de montage - FD E 25-030 - 08-84
Articles de boulonnerie d'usage général. Spécifications techniques. Réception. Commande. Livraison - NF E 27-005 - 10-69
Éléments de fixation. Essais de fatigue sous charge axiale - NF E 27-009 - 10-69

Patents

US8037772B2. Thread forming fasteners for ultrasonic load measurement and control.

EP787980B1. Measuring a load on a part and monitoring the integrity of the part | Belastungsmessung eines Elementes und Überwachung seiner Integrität | Mesure de la charge dans une pièce et surveillance de l'intégrité de cette pièce.

US5301574A. Hydraulic wrench and piston has rack gear meshed with...