Analýza procesních parametrů technologie Selective Laser Melting
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Abstract
Cílem této bakalářské práce je analýza vstupních parametrů procesu SLM a posouzení jejich vlivu na výstupní strukturu materiálu. V této práci byly ovlivňovány dva parametry, a to výkon laseru a skenovací rychlost. Vyhodnocovanými parametry procesu byly porozita materiálu a tvrdost v daném řezu. Praktická část této práce byla rozdělena na tři části - analýzu vstupního prášku, aplikování metody DOE a využití statistické metody ANOVA pro zobrazení výsledků. Provedením použité metody bylo zjištěno, že největší vliv na konečnou porozitu a tvrdost má výkon laseru. Hlavním zjištěním této práce je fakt, že je možné využívat metody DOE pro analýzu vstupních parametrů pro SLM proces. Dále se ukazuje nutnost většího počtu replikací testu pro dosažení vyšší statistické významnosti ANOVA testu.
The aim of this bachelor thesis is analysis of input parameters of SLM process and evaluation of their influence on output structure of the material. In this thesis, two main parameters - laser power and scanning speed - were affected during the tests. The porosity of material and hardness were chosen as output parameters. The practical part of this thesis was divided into the three parts - analysis of input powder, aplication of DOE method and using the ANOVA statistical method for plotting the results. With use of these methods, it was found out that the value of laser power influences both porosity and hardness in the most signifacant way. The main finding of this paper is that it is possible to use DOE for analysis of input parameters for the SLM proces. Another finding is that it is necessary to run more replications of the experiment in order to obtain more reliable data from ANOVA test.
The aim of this bachelor thesis is analysis of input parameters of SLM process and evaluation of their influence on output structure of the material. In this thesis, two main parameters - laser power and scanning speed - were affected during the tests. The porosity of material and hardness were chosen as output parameters. The practical part of this thesis was divided into the three parts - analysis of input powder, aplication of DOE method and using the ANOVA statistical method for plotting the results. With use of these methods, it was found out that the value of laser power influences both porosity and hardness in the most signifacant way. The main finding of this paper is that it is possible to use DOE for analysis of input parameters for the SLM proces. Another finding is that it is necessary to run more replications of the experiment in order to obtain more reliable data from ANOVA test.
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Selective Laser Melting, SLM, Design of Experiments, DOE, Porozita, Tvrdost, Selective Laser Melting, SLM, Design of Experiments, DOE, Porosity, Hardness