Effect of the focal plane position on CO2 laser beam cutting of injection molded polycarbonate sheets

Mahmoud Moradi; Omid Mehrabi; Taher Azdast; Khaled Y. Benyounis

doi:10.1117/12.2248416

11 November 2016 Effect of the focal plane position on CO2 laser beam cutting of injection molded polycarbonate sheets

Mahmoud Moradi, Omid Mehrabi, Taher Azdast, Khaled Y. Benyounis

Proceedings Volume 10150, Second International Seminar on Photonics, Optics, and Its Applications (ISPhOA 2016); 101500F (2016) https://doi.org/10.1117/12.2248416
Event: Second International Seminar on Photonics, Optics, and Its Applications (ISPhOA 2016), 2016, Bali, Indonesia

Abstract

In the present research, the effect of laser beam focal plane position (FPP) on the kerf quality of the polycarbonate laser cutting is investigated. Low power CO2 laser is used as the heat source of the cutting runs. In the experiments, FPP is varied from 0 to -4mm while other processing parameters (i.e. laser power, cutting speed and gas pressure) are considered constant. Upper and lower kerf width, kerf taper, upper heat affected zone and surface roughness of the kerf wall are also considered as the responses. Observations signified that reducing the position of the laser beam focal point from zero to - 3mm reduces the upper and lower kerf width. However reducing FPP below -3mm leads to an increase in the kerf width. Results also reveals that upper heat affected zone value reduces by reduction in FPP. Moreover the best kerf wall surface roughness occurred at FPP= -3mm.

Citation Download Citation

Mahmoud Moradi, Omid Mehrabi, Taher Azdast, and Khaled Y. Benyounis "Effect of the focal plane position on CO2 laser beam cutting of injection molded polycarbonate sheets", Proc. SPIE 10150, Second International Seminar on Photonics, Optics, and Its Applications (ISPhOA 2016), 101500F (11 November 2016); https://doi.org/10.1117/12.2248416

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