The Optimization Design Study of Selective Laser Sintering Process Parameters on the Pro-Coated Sand Mold
This paper presents experimental investigations on inﬂuence of important process parameters viz., laser power, scan speed, layer thickness, hatching space along with their interactions on dimensional accuracy of Selective Laser Sintering (SLS) processed pro-coated sand mold. It is observed that dimensional error is dominant along length and width direction of built mold. Optimum parameters setting to minimize percentage change in length and width of standard test specimen have been found out using Taguchi’s parameter design. Optimum process conditions are obtained by analysis of variance (ANOVA) is used to understand the signiﬁcance of process variables affecting dimension accuracy. Scan speed and hatching space are found to be most signiﬁcant process variables inﬂuencing the dimension accuracy in length and width. And laser power and layer thickness are less influence on the dimension accuracy. The optimum processing parameters are attained in this paper: laser power 11 W; scan speed 1200 mm/s; layer thickness 0.5 mm and hatching space 0.25 mm. It has been shown that, on average, the dimensional accuracy under this processing parameters combination could be improved by approximately up to 25% compared to other processing parameters combinations.
R. Cheng et al., "The Optimization Design Study of Selective Laser Sintering Process Parameters on the Pro-Coated Sand Mold", Applied Mechanics and Materials, Vols. 55-57, pp. 853-858, 2011