Author
Abstract
In as much as employ activity of the laser in industrial applications specially in
the drilling & cutting works, it is important to study all variables & factors that affect
efficiency & speed of performance such as that processes. In this paper, the study of
the focusing effect of laser beam on the penetrating & cutting speed was done, through
deriving the mathematical equations, and re-wording it to demonstrating clearly the
role of the focusing system on application speed, and calculate the variations of the
efficiency of these processes.
The results demonstrated that the application speed (penetration, cutting)
affected by the changing in the radius of laser beam, these variables were studied from
one hand by comparing the cutting speed with and without the beam expander, where
in CO2 laser case it raised from (1.56 mm/sec) to (7.78 mm/sec) and from the other
hand by using a number of concentrating lenses in the focusing system to show its
effects on the application speed. Where the focal length of this lenses has a negative
effect on the degradation of the cutting speed while, it has a double negative effect on
the degradation of the penetration speed, where the degradation in penetration and
cutting speed (0.574) and (0.384) respectively with change in collimated lens focal
length about (100 - 200 mm).
Keywords
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