ISSN:
1662-9779
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Physics
Notes:
There is a big variety of machines and equipment – internal combustion engines, aviationparts, building frames - joined by threaded joints, realized as bolt, nut and pin ones. For successfuland safe exploitation of such equipment, it is required to check the tightening degree of threadedjoints. There are few known methods of such control and one is presented in this paper. Theproposed method is based on contact stiffness and friction change from thread tightening degree. Atthe same time, tightening changes with sufficient significance the dynamical properties of such asystem - natural and resonance frequencies, amplitude – frequency and amplitude-phasecharacteristics, so, that it is possible to evaluate the tightening degree of the investigated joint.Dynamic properties are defined by exciting transient process between bolt head and tightened bythis bolt detail using as short as possible force impact. Sensors register analogical signal of transientprocess and transmit it to a special computer card. The computer card converts analogical signal tocode. Code is saved in the computer file for further processing. Processing data is saved in this file,and we find desired dynamical characteristics. Using special experimental bench proved thatdynamic characteristics are sensitive enough to threaded joint tightening degree and the method isapplicable to practice
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/22/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.113.277.pdf
Permalink
