20.500.12556/DKUM-10582 PRIMERJAVA METOD MERJENJA SREDNJEGA PREMERA NAVOJA IN ANALIZA VPLIVOV NA MERILNI REZULTAT COMPARISING MEASURING METHODS OF PITCH DIAMETER OF THREAD GAUGES AND ANALYSIS OF INFLUENCES ON THE MEASUREMENT RESULTS Kalibracija srednjega premera navojnih obročev je v zadnjih letih zelo napredovala zaradi izboljšav na področju opreme za kalibracijo navojnih veličin. Klasični postopki za kalibracijo srednjega premera navojnega obroča, ki se izvaja z metodo dveh kroglic, so znani že iz 19. stoletja in se opravljajo na univerzalnih dolžinskih merilnih strojih ter v zadnjih dveh desetletjih tudi na koordinatnih merilnih strojih. Modernejše metode pa uporabljajo skeniranje profila in matematične obdelave geometrije le-tega. Te metode se opravljajo tako na optičnih kot tudi na mehanskih skenerjih. Predstavljena je primerjava med tremi metodami kalibracije srednjega premera navojnega obroča, in sicer dve klasični metodi (na enoosnem merilnem stroju ULM in na koordinatnem merilnem stroju) ter modernejša metoda na Master Scanerju. S primerjavo metod, podrobno analizo vplivov na merilno negotovost in velikim številom izvedenih meritev smo želeli izboljšati negotovost kalibracije srednjega premera navojnega obroča pri klasičnih kalibracijah, vendar smo ugotovili, da je trenutno določena merilna negotovost preozka in bi bilo treba v obeh laboratorijih, kjer so se meritve izvajale, revidirati merilno negotovost glede na dobljene rezultate. Meritve srednjega premera navojnega obroča, ki so tema te naloge, so bile vključene tudi v mednarodno interkomparacijo LABCOM 2008, katere predmet je bil isti navoj, kot je bil uporabljen pri tej nalogi. The calibration of the pitch diameter of thread rings has been significantly improved during the last years due to improvements in the field of calibration equipment used for calibration of threads. The classical methods and procedures for calibration of a pitch diameter of a thread ring, such as the two balls method, are well known since the 19th century and are executed by means of universal measuring machines, and in the last two decades even by means of coordinate measuring machines. More modern methods deal with scanning of the profile and the mathematical processing of the received data. These methods are executed on optical as well as on mechanical scanning machines. In the dissertation, the differences between three calibration methods of the thread ring pitch diameter are being presented. Two of these methods are classical methods (executed on a one-axial measuring machine ULM and on a coordinate measuring machine); the third method is a modern one, executed on a Master Scanner. We have tried to improve the measurement uncertainty of calibration of the thread ring pitch diameter for classical calibrations by comparing the methods, analyzing the influences on the measuring uncertainty and numerous measurements, but we have noticed that the momentary set measurement uncertainty is too narrow so that it would be necessary to revise the measurement uncertainty according to obtained results in both laboratories, in which the measurements were executed. navojni obroč kalibracija srednji premer navoja merilna negotovost dimenzijsko merjenje thread ring gauge calibration pitch diameter measurement uncertainty dimensional measurements true true false T. Primožič Merkač] Slovenski jezik Angleški jezik Doktorska disertacija 2009-05-25 19:41:15 2009-06-02 11:53:31 2022-04-11 16:23:45 2022-04-16 03:33:25 2009 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.992.3:53.082.1(043.3) 9269044 URN:SI:UM:DK:ASMTKAIA DR_Primozic_Merkac_Tadeja_2009.pdf DR_Primozic_Merkac_Tadeja_2009.pdf 1 93F312EA208D6F68227029BD1C451AFF 74b15bf0e2068a5e50a66d185bdbfccd8f6265d963072519d49bade915347796 de305484-7c02-11eb-bb7a-00155d0001ca 20.500.12556/dkum/64614ab5-6b4c-447e-aea4-6ce2cad3f2d5 https://dk.um.si/Dokument.php?lang=slv&id=8759 Fakulteta za strojništvo 0 0 0