Einsatz Neuer Laser-Technologien Zur Messung Der Abweichung Von Der Geradlinigkeit
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1.1. Bedeutung der Messung der Abweichung von der Geradheit Die Begrenzungsflächen von Einzelteilen technischer Erzeugnisse werden in der Regel durch geradlinige und rotatorische Rela- tivbewegungen zwischen Werkstück und Werkzeug bei der Zerspa- nung bestimmt. Die Bewegungen der Fertigungseinrichtung sind niemals fehlerfrei (Bild 1) und erzeugen daher Werkstücke mit Formabweichungen, wodurch das Funktionsverhalten dieser Werk- stücke stark beeinträchtigt werden kann. Teilamicht von Z Stellen an denen FOhrungsfehler auftreten können - z Ungeradheit der Bewegungen Bild 1: Auswirkungen von Führungsfehlern auf die Bewegungen einer Drehmaschine Um die Funktionssicherheit der Produkte des Maschinenbaus zu garantieren, müssen die einzelnen Werkstücke auf ihre geome- trische Genauigkeit geprüft werden. Die Kenntnis der Arbeitsge- nauigkeit der eingesetzten Werkzeugmaschinen ist jedoch für die Fertigung von noch grö ere Bedeutung. Sowohl bei der Ver- - - messung von Maschinenteilen als auch bei der Ermittlung der Arbeitsgenauigkeit von Fertigungseinrichtungen stellen die geo- metrischen Prüfungen einen wichtigen Teilaspekt dar /1, 2/. Die wesentlichen geometrischen Prüfungen sind: Geradheit, Ebenheit, Rechtwinkligkeit, Fluchtung, Parallelität, Abstandsgleichheit, Rundlauf. Ein gro er Teil dieser genannten Me aufgaben sind prinzipiell Messungen der Abweichung von der Geradheit. Sie unterscheiden sich lediglich durch die jeweiligen Me bedingungen und die Dar- stellungsweise (Bild 2).
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