Σύστημα στίλβωσης μεταλλικών καλουπιών σε κέντρα κατεργασιών CNC τριών αξόνων

Αβράμπος, Παναγιώτης; Avrampos, Panagiotis

dc.contributor.author	Αβράμπος, Παναγιώτης	el
dc.contributor.author	Avrampos, Panagiotis	en
dc.date.accessioned	2015-09-30T09:10:06Z
dc.date.available	2015-09-30T09:10:06Z
dc.date.issued	2015-09-30
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/41345
dc.identifier.uri	http://dx.doi.org/10.26240/heal.ntua.9919
dc.rights	Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ελλάδα	*
dc.rights	Αναφορά Δημιουργού - Μη Εμπορική Χρήση - Παρόμοια Διανομή 3.0 Ελλάδα	*
dc.rights.uri	http://creativecommons.org/licenses/by-nc-sa/3.0/gr/	*
dc.subject	Στίλβωση	el
dc.subject	Γυάλισμα	el
dc.subject	Ααυτοματοποιημένη κατεργασία	el
dc.subject	Δακτύλιοι στίλβωσης	el
dc.subject	Τροχοειδής καμπύλη	el
dc.subject	Automatized polishing	en
dc.subject	Trochoidal curve	en
dc.subject	Mirror surface	en
dc.subject	Polishing ring	en
dc.subject	Diamond paste	en
dc.title	Σύστημα στίλβωσης μεταλλικών καλουπιών σε κέντρα κατεργασιών CNC τριών αξόνων	el
heal.type	bachelorThesis
heal.generalDescription	Περιέχει τέσσερα τμήματα. Την θεωρητική και βιβλιογραφική ανάλυση, το κατασκευαστικό τμήμα με φωτογραφίες και περιγραφή των κατασκευών, το ερευνητικό, με διατύπωση γεωμετρικών μοντέλων κάλυψης επιφανείας και το πειραματικό με μεθοδολογία και αποτελέσματα των πειραμάτων που εκτελέστηκαν.	el
heal.classification	Τεχνολογία κατεργασιών των υλικών	el
heal.classification	Κατεργασίες CNC	el
heal.language	el
heal.access	free
heal.recordProvider	ntua	el
heal.publicationDate	2015-06-26
heal.abstract	One of the most rapidly advancing branches of precision machining is polishing. However, despite of the wide automation of machining processes through the increasing usage of CNC machines, polishing is still mainly executed manually due to its complexity and large number of affecting parameters. Experienced workers, through countless hours of experimenting with many different polishing tools and techniques, manage to achieve surfaces with exquisite levels of dimensional precision accompanied with extremely low levels of roughness, that approach “mirror” quality. However, the process is particularly time-consuming and strenuous. In addition to that, even the most insignificant mistake could be proven to be irreversible, ruining the mould and obliging the worker to repeat the entire process from scratch. In this work, the tool movement that is manually forced by the worker is modeled through the use of the trochoid curve. Additionally, a general methodology of trochoid parameters selection for each polishing tool is presented. As polishing tools we select polishing rings of different materials and dimensions combined with diamond pastes of various grain sizes. Furthermore, models that create trochoid curves by the use of random guide curves are developed. This makes possible the creation and use of any tool path on both 2D and 3D planes. Also, a model that analyzes the behavior of the spinning polishing ring is presented. This model is based on the interaction between tool and surface and establishes the necessary restrictions that must be fulfilled in order for the polishing rings to be effective and lead to the desirable results. Finally, after some first manual and automized tests, Taguchi analysis is proposed to be used in order to formalize the experiments and reach to safe conclusions. The experiments were run on the HAAS CNC machining centre of the Laboratory of Manufacturing Technology of NTUA. This happens by using a special base we have created to attach the free end of the grinder on the CNC machine. The experimental setup that is described in this work allows us to measure and control the applied force. The tool path is controlled through G-code that is fully defined using the developed models we present.	en
heal.advisorName	Βοσνιάκος, Γεώργιος-Χριστόφορος	el
heal.committeeMemberName	Βοσνιάκος, Γεώργιος-Χριστόφορος	el
heal.committeeMemberName	Μανωλάκος, Δημήτριος	el
heal.committeeMemberName	Μαρκόπουλος, Άγγελος	el
heal.academicPublisher	Εθνικό Μετσόβιο Πολυτεχνείο. Σχολή Μηχανολόγων Μηχανικών. Τομέας Τεχνολογίας των Κατεργασιών. Εργαστήριο Κατεργασιών των Υλικών (Μηχανουργικό και Μηχανολογικό Εργοστάσιο)	el
heal.academicPublisherID	ntua
heal.numberOfPages	163 σ.
heal.fullTextAvailability	true