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Title: Process parameter optimization for direct metal laser sintering (DMLS)
Authors: NING YU
Keywords: Direct metal laser sintering (DMLS), intelligent parameter selection (IPS), homogeneity, speed compensation(SC), layer-based hatch optimization, dexel
Issue Date: 20-May-2005
Citation: NING YU (2005-05-20). Process parameter optimization for direct metal laser sintering (DMLS). ScholarBank@NUS Repository.
Abstract: Rapid prototyping is a layer-based material additive process and can produce 3-D freeform objects directly. The aim of this research is to improve the overall performance of the Direct Metal Laser Sintering (DMLS) process by optimizing the control of process parameters that have very strong influence at the quality of the built part. An intelligent parameter selection (IPS) system has been implemented. The set of process parameters can be determined according to different requirements using IPS system. The length of the hatch line is one significant factor that affects the homogeneity of the final part. The negative effect of short hatch lines on part accuracy and mechanical properties was quantitatively analyzed. A layer-based hatch optimization method has been developed to optimize the hatch direction. To further reduce the effect of the residual short lines, a speed compensation (SC) method that includes experimental data collection method and statistical analysis was developed.
Appears in Collections:Ph.D Theses (Open)

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