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Nedsonic® Tightening : Determination of assembly preload during plastic deformation

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Nedsonic® Tightening : Determination of assembly preload during plastic deformation

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Samenvatting

One of the developments within the Nedschroef Techno Centre is the Nedsonic® bolt tightening system. The bolts used for the Nedsonic® bolt tightening system are specifically designed for ultrasonic measurement. The measurements can be done without any preparation to the bolts first. This tightening/measuring system is used in production in companies like DAF Trucks and Scania.
Scania has chosen the Nedsonic® bolt tightening system for an application involving multiple tightening beyond yield point on one bolt. This is never done before using the Nedsonic® bolt tightening system. It is known that an ultrasonically measured elongation of a bolt can be mathematically connected to an assembly preload in the elastic phase of elongation. Knowing what is described in the last sentence and the chosen application at Scania, the logical question and at the same time the research question for this report is:

Can the assembly preload be determined using the Nedsonic® bolt tightening system during plastic deformation of a bolt?

Toon meer
OrganisatieHogeschool van Arnhem en Nijmegen
InstituutInstituut Automotive
Gepubliceerd in
Datum2010-01-06
TypeBachelorscriptie
TaalEngels

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