Possibility of Lasercutting

In: Computers and Technology

Submitted By booster
Words 4274
Pages 18
Teamorientierte Projektarbeit

Sommersemester 2012

Gliederung:

I. Stand der Technik

1) Allgemeines

2) Wichtige Laserstrahlquellen a) Festkörperlaser b) Gaslaser

3) Laserverfahren a) Laserstrahlschmelzschneiden b) Laserstrahlbrennschneiden c) Laserstrahlsublimierschneiden

4) Schadstoffe und Arbeitsschutz

II. Versuchsteile

1) Aufbauvarianten

2) Schwierigkeitsgrade der Materialaufbauten

III. Schnittversuche und Auswertung

1) Kriterien

2) Versuchsergebnisse

3) Einfluss der Parameter a) Schnittgeschwindigkeit b) Düsenabstand c) Schneidgasdruck d) Laserleistung

IV. Maschinenstundensatzrechnung

V. Schlussfolgerung und weitere Anregungen

I. Stand der Technik

1. Allgemeines

Laserschneiden ist ein Trennverfahren, durch das Werkstoffe thermisch getrennt werden. Es gibt verschiedene Medien durch die ein Laserstrahl erzeugt werden kann. Die wohl wichtigsten Lasermethoden für die Bearbeitung von Werkstoffen sind der Festkörperlaser und der Kohlenstoffdioxidlaser. Laser Substanzen wie z.B. Rubin (Festkörperlaser) oder CO2 (Kohlenstoffdioxidlaser) werden elektrisch angeregt um so einen Laserstrahl zu erzeugen. Der Laserstrahl wird stark fokussiert und wirkt nur auf einen sehr begrenzten Bereich ein, weshalb das Werkstück kaum durch die Wärme belastet wird. Des Weiteren wird im Regelfall nur eine kurze Einwirkzeit bis zum Durchtrennen benötigt, was hohe Schnittgeschwindigkeiten ermöglicht. Der fokussierte Laserstrahl wird auf das Werkstück projiziert. Durch die hohe Energie wird der Werkstoff geschmolzen oder sogar verdampft. Beim Laserschneiden wird zwischen 3 Varianten unterschieden:

* Laserbrennschneiden * Laserschmelzschneiden * Lasersublimierschneiden
Auf diese Varianten wird im Punkt I.3 genauer eingegangen. Durch die vielen…...

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