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- W2889472347 abstract "Laser metal deposition (LMD) is an additive manufacturing technique, whose performances can be influenced by several factors and parameters. Monitoring their evolution allows for a better comprehension and control of the process, hence enhancing the deposition quality. In particular, the deposition height is an important variable that, if it does not match the process growth, can bring to defects and geometrical inaccuracies in the deposited structures. The current work presents a system based on optical triangulation for the height monitoring, implemented on a LMD setup composed of a fiber laser, a deposition head, and an anthropomorphic robot. Its coaxial and non-intrusive configuration allows for flexibility in the deposition strategy and direction. A measurement laser beam is launched through the powder nozzle and hits the melt pool. A coaxial camera acquires the probe spot, whose position is converted to relative height. The device has been demonstrated for monitoring the deposition of a stainless steel cylinder. The measurements allowed to reconstruct a spatial map of the height variation, highlighting a transient in the deposition growth which can be explained in terms of a self-regulating mechanism for the layer thickness." @default.
- W2889472347 created "2018-09-07" @default.
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- W2889472347 date "2019-01-01" @default.
- W2889472347 modified "2023-09-30" @default.
- W2889472347 title "Monitoring of laser metal deposition height by means of coaxial laser triangulation" @default.
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- W2889472347 doi "https://doi.org/10.1016/j.optlaseng.2018.09.012" @default.
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