Study of Biomass Composite Workpiece Support Structure Based on Selective Laser Sintering Technology.

Selective laser sintering (SLS) is a widely used 3D printing method for fabricating complex parts. However, thin-walled structures often suffer from warpage and dimensional inaccuracies due to thermal stresses during the printing process. Prior research has shown that these distortions limit the precision and usability of printed components. Despite established knowledge on thermal deformation mechanisms, no prior work had resolved how to effectively suppress warpage in thin-walled parts using SLS. This gap motivated the exploration of support structures to mitigate these issues. Existing studies have examined various printing parameters, but few have focused on the role of support structures in reducing dimensional errors. The uncertainty around optimal support designs drove the need for this investigation. This study builds upon known limitations in SLS printing of thin-walled parts and introduces a novel approach to address these challenges. By focusing on support structure design, the research aims to improve printing accuracy in a practical and cost-effective manner.

This study aimed to evaluate how different support structures influence the dimensional accuracy and warpage of thin-walled parts printed via selective laser sintering. The specific problem addressed was the high rate of deformation and dimensional deviation in such parts due to thermal stresses. The motivation stemmed from the need to enhance the reliability and precision of SLS-printed components. The research sought to determine the most effective support structure for minimizing warpage and dimensional errors. Three types of support structures—lattice, concentric, and cross—were compared in this context. The study also aimed to identify optimal parameters for each support type, such as filling density and thickness. The ultimate goal was to provide a practical solution for improving the quality of thin-walled parts in SLS printing. By focusing on support structure design, the study aimed to bridge the gap between theoretical knowledge and practical application in additive manufacturing.

The study employed selective laser sintering technology to fabricate thin-walled parts with and without support structures. Three distinct support types—lattice, concentric, and cross—were tested under varying conditions. The parameters evaluated included filling density and thickness of each support structure. The impact of each support on warpage and dimensional accuracy was measured using standard metrological tools. The experimental setup involved printing identical parts with different support configurations. Data was collected on dimensional deviations along the Z-axis and overall shape deformation. Statistical analysis was conducted to compare the performance of each support structure. The results were used to determine the optimal parameters for each support type based on their effectiveness in reducing errors.

The addition of support structures significantly reduced dimensional errors in printed parts. The Z-axis dimensional errors were reduced by 33.809%, 86.160%, and 66.214% for lattice, concentric, and cross supports, respectively. Warpage was also reduced by 35.673%, 46.189%, and 46.059% for the same support types. These findings suggest that support structures effectively mitigate thermal deformation in thin-walled parts. The concentric support structure showed the highest reduction in dimensional errors. The cross-type support minimized material consumption while still achieving satisfactory results. The lattice structure provided moderate improvements in both categories. These results indicate that the choice of support structure significantly affects printing accuracy.

The study demonstrates that bottom support structures can significantly reduce warpage and dimensional errors in thin-walled parts printed via selective laser sintering. The concentric support structure proved most effective in minimizing dimensional deviations. The cross-type support offered a balance between material efficiency and dimensional accuracy. The lattice structure provided moderate improvements but was less effective than the other two types. These findings suggest that support structure design plays a crucial role in enhancing printing precision. The results align with the authors' claim that optimized support structures can improve the quality of SLS-printed parts. The study supports the idea that support structures can be tailored to specific printing requirements. The findings may guide future efforts in optimizing support structures for additive manufacturing processes.