Flächenorientierte Steuerdatenaufbereitung Für Das Fünfachsige Fräsen
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Diese Publikation befa t sich mit der Entwicklung einer Steuerung f}r die Freiformfl{chenbearbeitung mit der Mglichkeit, Bahnvorgaben in Parameterkoodinaten der Fl{chenbeschreibung zu interpolieren. Die damit verbundenen Vorteile sind der durchg{ngige Informationsflu f}r Geometriedaten, die Reduktion der NC-Datenmenge, die Flexibilit{t des Fr{sereinsatzes und die hohe Bearbeitungsgeschwindigkeit. Es wurde eine erweiterte NC-Programmierschnittstelle nach DIN 66025 zur Freiformfl{chenbearbeitung spezifiziert. Wesentlich dabei ist die Definitionvon beliebigen Fl{chenkurven als Fr{sbahn. Durch Verwendung der B-Spline-Kurvenapproximation werden alle in konventionellen Steuerungen vorkommenden Bahnen in einer einheitlichen Polynomform f}r die Sollwerterzeugung dargestellt. Ein darauf basierendes Einschrittverfahren zur allgemeinen Polynominterpolation wurde entwickelt. Die neuen Interpolationsverfahren und -strukturen f}r die Freiformfl{chenbearbeitung zeigen, da nur durch Spline-Generierung sowohl f}r die Bahn als auch f}r die Orientierung eine hohe Bahngenauigkeit zu gew{hrleisten ist. Aus den gewonnenen Ergebnissen wurde die Struktur einer fl{chenorientierten Steuerdatenaufbereitung in der Steuerung festgelegt. Inhalts}bersicht: Abk}rzungen und Formelzeichen - Einleitung - Problemstellung und Stand der Technik - NC-Programmierschnittstelle f}r die Freiformfl{chenbearbeitung - Allgemeine Polynominterpolation zur Sollwerterzeugung - Fl{chenorientierte Steuerdatenaufbereitung f}r das f}nfachsige Fr{sen - Realisierung - Zusammenfassung - Schrifttum
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