Advances in Production Engineering & Management
Volume 8 | Number 1 | March 2013 | pp 25–32
http://dx.doi.org/10.14743/apem2013.1.150
Robot laser hardening and the problem of overlapping laser beam
Babic, M.; Balic, J.; Milfelner, M.; Belic, I.; Kokol, P.; Zorman, M.; Panjan, P.
ABSTRACT AND REFERENCES (PDF) |
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A B S T R A C T
Since 1970, many studies of various laser machining processes and their applications
have been published. This paper describes some of our experience in
laser surface remelting, consolidating, and hardening of steels. We focus on the
problem of robot laser hardening of metals with overlapping of the hardened
zone. The process of laser hardening with remelting of the surface layer allows
us to very accurately determine the depth of modified layers. In this procedure,
we know the exact energy input into the material. Heating above the
melting temperature and then rapidly cooling causes microstructural changes
in materials, which affect the increase in hardness. We identify the relationship
between hardness and width of overlapping. We describe the results of previous
work, research, and experience in robot laser hardening of metals. We also
show the results of laser processing techniques with the problem of overlapping.
Our tests were carried out on materials of DIN standard 1.2379 and
1.7225, and measurements were performed in the hardened zone of overlapping
at 2 mm, 3 mm, 4 mm, 6 mm, and 10 mm. We show relationship between
hardness and width of overlap for material of DIN standard 1.2379 and
1.7225. The modeling of the relationship was obtained by the 3 layers artificial
neural network.
A R T I C L E I N F O
Keywords • Robot, Laser, Hardening, Overlapping, Neural network
Corresponding author • Babic, M.
Published on-line • 29 June 2013
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