| Zugriffsnummer | 25326 |
| Dokumenttyp | Konferenzartikel |
| Sprache | Englisch |
| Titel | Design and evaluation of a rolling friction apparatus for micro linear bearings |
| Autor(in); Institution |
Meeß, Rudolf; 5.5, Wissenschaftlicher Gerätebau, PTB-Braunschweig
Löffler, Frank; 5.5, Wissenschaftlicher Gerätebau, PTB-Braunschweig
|
| Quelle/Jahr | Friction, wear and wear protection : International Symposium on Friction, Wear and Wear Protection 2008 Aachen:(2009), 460 - 466 |
| Herausgeber(in) |
Fischer, Alfons
|
| ISBN | 978-3-527-32366-1 |
| Verlag | Weinheim: Wiley-VCH |
| Konferenzangaben | International Symposium on Friction, Wear and Wear Protection, Aachen, 09-11, April, 2008, Germany |
| Freie Schlagworte | wear protection ; micro linear bearings ; rolling friction ; wear ; friction |
| Zusammenfassung | Designing miniaturized rolling element linear bearings requires an appropriate knowledge of the frictional behaviour. Down-scaling needs low moving masses of a coupled apparatus for determining the frictional forces. In particular compliant force-measuring techniques lead to system-immanent undesirable stick-slip phenomena. A new apparatus was designed to minimize the influence of the coupled mechanism on the friction measurements. Therefore displacements are measured optically with sub-nm resolution over a range of several mm. Forces up to several mN are induced and determined by a direct coupled and low mass lorentz actuator, resolution restricted in terms of the noise of the amplifier. Either a digital or an analog positioning loop can be used for controlling the force with the displacement signal as feedback. Stick-slip behaviour can be avoided and straightforward the expected displacement or force-loops are obtained. Static and kinetic friction forces as well as energy losses so can be deduced. The compact apparatus is used for the characterization of micro-linear bearings with spheres of 200 µm in diameter, dry running and lubricated. It can be seen, that in the macroscopic displacement range the texture and mechanical surface properties of the functional bearing parts determine the frictional behaviour and noise. Furthermore in the pre-rolling regime a force-displacement correlation is observed, which can be modeled and correlated with literature data. |
