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Process optimization of complex geometries using feed forward control for laser powder bed fusion additive manufacturing
摘要： Additive manufacturing (AM) enables the fabrication of complex designs that are di?cult to create by other means. Metal parts manufactured by laser powder bed fusion (LPBF) can incorporate intricate design features and demonstrate desirable mechanical properties. However, printing a part that is quali?ed for its intended application often involves reprinting and discarding many parts to eliminate defects, improve dimensional accuracy, and increase repeatibility. The process of iteratively converging on the appropriate build parameters increases the time and cost of creating functional LPBF manufactured parts. This paper describes a fast, scalable method for part-scale process optimization of arbitrary geometries. The computational approach uses feature extraction to identify scan vectors in need of parameter adaptation and applies results from simulation-based feed forward control models. This method provides a framework to quickly optimize complex parts through the targeted application of models with a range of ?delity and by automating the transfer of optimization strategies to new part designs. The computational approach and algorithmic framework are described, a software package is implemented, the method is applied to parts with complex features, and parts are printed on a customized open architecture LPBF machine.
关键词： control,DMLS,DMLM,optimization,3D printing,additive manufacturing,powder bed fusion
更新于2025-09-23 15:21:01
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Experimental investigation and optimization of direct metal laser sintering process for shrinkage rate using CL50WS material
摘要： In today’s competitive era, the quality of the die or mould is very significant for tooling industries which is highly influencing the final product. The dimensional inaccuracy of die due to shrinkage rate of parts lead to increase defective parts, and shrinkage can be minimizing by controlling of proper design parameter of process. Hence, the aims of this study to optimize the process parameter of DMLS process for CL50WS die material. In this study, analysis and optimization of four process parameters namely laser power, layer thickness, scan speed and hatch distance, and take shrinkage rate as response. Result shows that optimum process parameter (laser power 129.814 Watt, scan speed 554.439 mm/s, layer thickness 0.05 mm and hatch distance 0.01 mm) gives acceptable range of error (delta H, delta W and delta L are 6.42%, 8.29 % and 10.72% respectively).
关键词： BBD,Direct metal laser sintering,AM,optimization,RSM,Shrinkage rate,DMLS
更新于2025-09-16 10:30:52