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The Influence of Selected Selective Laser Sintering Technology Process Parameters on Stress Relaxation, Mass of Models, and Their Surface Texture Quality
3D Printing and Additive Manufacturing ( IF 3.1 ) Pub Date : 2020-06-05 , DOI: 10.1089/3dp.2019.0036
Tomasz Kozior 1
Affiliation  

The article presents the results of research on the impact of basic process parameters of selective laser sintering technology on the mass of the produced models (density of the sintered material—polyamide PA 2200), stress relaxation during compression determined in accordance with the ISO 3384 standard, and geometric surface structure parameters (SGPs). During the tests, the influence of process parameters such as the location of the models on the virtual construction platform (printing direction), the density of the energy supplied to the sintered layer of powder, and the layer thickness of the manufactured material layer was taken into account. The test results confirmed that the process parameters have a significant impact on the density of the model material (in the sintered state), the mechanical properties (stress relaxation during compression), and the quality of the surface texture (SGPs). The most favorable positioning variants of the models on the construction platform were determined. The most favorable thickness variants of the combined layers and the density value of the energy supplied to the sintered powder layer were selected, depending on the expected mass, strength, and SGP quality. In addition, it has been shown that it is possible to build models with reduced mass (>20%), while maintaining satisfactory mechanical and qualitative properties of the surface texture.

中文翻译:

选定的选择性激光烧结技术工艺参数对应力松弛、模型质量及其表面纹理质量的影响

本文介绍了选择性激光烧结技术的基本工艺参数对所生产模型质量(烧结材料的密度 - 聚酰胺 PA 2200)影响的研究结果,压缩过程中的应力松弛根据 ISO 3384 标准确定和几何表面结构参数 (SGP)。在测试过程中,模型在虚拟构建平台上的位置(打印方向)、提供给粉末烧结层的能量密度以及制造材料层的层厚等工艺参数的影响考虑到。测试结果证实,工艺参数对模型材料(烧结状态)的密度有显着影响,机械性能(压缩过程中的应力松弛)和表面纹理 (SGP) 的质量。确定了模型在施工平台上最有利的定位变体。根据预期的质量、强度和 SGP 质量,选择了组合层的最有利厚度变化和提供给烧结粉末层的能量密度值。此外,已经表明可以构建质量减少 (>20%) 的模型,同时保持表面纹理的令人满意的机械和质量特性。根据预期的质量、强度和 SGP 质量,选择了组合层的最有利厚度变化和提供给烧结粉末层的能量密度值。此外,已经表明可以构建质量减少 (>20%) 的模型,同时保持表面纹理的令人满意的机械和质量特性。根据预期的质量、强度和 SGP 质量,选择了组合层的最有利厚度变化和提供给烧结粉末层的能量密度值。此外,已经表明可以构建质量减少 (>20%) 的模型,同时保持表面纹理的令人满意的机械和质量特性。
更新日期:2020-06-05
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