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).