Apparatus for determination of friction factor between yarn and solid material

Rad ukratko opisuje postupak nastanka pređe i osnovne oblike trenja koji su od interesa za ovaj rad. Zatim se opisuju metode za testiranje faktora trenja između pređe i čvrstog materijala prema normi ASTM D3108. Korištena metoda naziva se indirektna metoda te se za njezinu konstrukciju odabiru pojedine komponente usvojene iz postojećih rješenja sličnih uređaja i standardne komponente. Konstrukcijsko rješenje uređaja za određivanje faktora trenja je razrađeno do razine radioničkih crteža te je izvršen i proračun čvrstoće, brzine vrtnje i momenta sile kritičnih komponenti. Konstrukcija je osmišljena tako da je moguće dodavanje maziva na bazi parafina u svrhu smanjenja utjecaja trenja. Na kraju je opisan i postupak mjerenja koristeći konstruirani uređaj.This paper briefly describes the process of yarn creation and the basic forms of friction that are of interest for this paper. Methods for testing the coefficient of friction between yarn and solid material according to ASTM D3108 are then described. The method used is called the indirect method, and individual components adopted from existing solutions of similar devices and standard components are selected for its construction. The construction solution of the device for determining the coefficient of friction has been worked out to the level of workshop drawings, calculation of the strength, speed of rotation and moment of force of critical components has also been carried out. The construction is designed in such a way that it is possible to add a paraffin-based lubricant in order to reduce the impact of friction. Finally, the measurement procedure using the constructed device is described