2007
DOI: 10.1243/09544054jem670
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Statistical modelling and optimization of surface roughness in the selective laser sintering process

Abstract: Selective laser sintering (SLS) is a layered manufacturing process that builds prototypes by selective sintering of materials in powder form, like thermoplastic polymer powder (Polyamide 2200), using a CO2 laser. Prototypes made by SLS are widely used in product development as they can be used for product testing. SLS prototypes, therefore, should have a very good surface finish for functional performance as well as aesthetics. However, prototypes made by the SLS process have comparatively high surface roughne… Show more

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Cited by 138 publications
(79 citation statements)
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“…The increased energy density causes the increased penetration of laser energy and increases the surface roughness. A similar phenomenon has also been reported in the steriolithography process [4] and when polyamide was used in SLS [6]. The surface roughness has been found decreasing with increase in beam speed.…”
Section: Upward Facing Surfacesupporting
confidence: 82%
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“…The increased energy density causes the increased penetration of laser energy and increases the surface roughness. A similar phenomenon has also been reported in the steriolithography process [4] and when polyamide was used in SLS [6]. The surface roughness has been found decreasing with increase in beam speed.…”
Section: Upward Facing Surfacesupporting
confidence: 82%
“…Bacchewar et al [6] made attempts to study the effect of process parameters on surface roughness of laser sintered polyamide parts. Central Composite Rotatable Design (CCRD) of experiments was used to plan the experiments.…”
Section: Introductionmentioning
confidence: 99%
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“…Bacchewar et al [10] showed that surface roughness mainly depends on the layer thickness but also highly depends on the build orientation since the side surfaces generally present a better finish than up facing or down-facing surfaces. Surface finish can be improved through surfaces treatments; however, this is also time-consuming and adds to the cost.…”
Section: Problem Formulationmentioning
confidence: 99%
“…(1) and (2) has been done by a standard MATLAB 2011a function, fmincon (Bacchewar et al 2007), which can handle optimization problems of the nonlinear nature. The obtained results has been validated by conducting experiment and are presented in Table 7.…”
Section: Process Optimizationmentioning
confidence: 99%