研究目的
To determine the accuracy of manufacturing lattice structures of the same topology with different parameters, as well as to estimate the density of samples with lattice structures.
研究成果
The most accurate cultivation in this mode is possible only for models with rod thickness from 300 to 450 microns. To build models with a parameter higher than this interval, it is necessary to simulate objects taking into account the attachment of powder particles on the surface of rods and the adjustment of the construction mode. Tomography gives the most accurate results but is recommended for the most complex and demanding parts.
研究不足
The main problem of the control of cellular structures is their small size and spatial orientation. The most accurate cultivation in this mode is possible only for models with rod thickness from 300 to 450 microns. Tomography gives the most accurate results but is complex and requires additional calibration equipment.
1：Experimental Design and Method Selection:
The study involved comparing experimental samples with their computer models to assess deviations caused by selective laser melting. Various measurement methods were tested for accuracy.
2：Sample Selection and Data Sources:
Lattice constructions made by selective laser melting on a SLM 280HL system from powder of the Ti64 alloy were used. The initial model was a CAD-model of the lattice structure with given sizes.
3：List of Experimental Equipment and Materials:
Equipment included a caliper, Tescan MIRA3 scanning electron microscope (SEM), FARO Platinum ARM for 3D scanning, and x-ray computed tomography with NSI XView CT X5000 and GE v/tome/x.
4：Experimental Procedures and Operational Workflow:
Measurements were carried out with a caliper, SEM, 3D scanning, and x-ray computed tomography. The thickness of the rod was measured for three samples of the same grid thickness in three places of the sample.
5：Data Analysis Methods:
The relative error in the construction of the AM-machine lattice samples was calculated for different methods. The relative density was calculated as the ratio of the volume occupied by the rods to the volume of the compact cube.
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