トポロジー最適化を活用した金属積層造形向け部品特性設計技術の開発

抄録

We developed a part characteristic design technology for a metal additive manufacturing using topology optimization. In the part design, it is necessary to determine the shape in consideration of manufacturing constraints in order to obtain the required part characteristics. Although it is difficult to obtain the appropriate manufacturing conditions, we have been able to predict deformation, stress and reduce dimensional errors in the heat shrinkage deformation during melting and solidification in the additive manufacturing shape design technology we have worked on. On the other hand, manufacturing constraints are related to factors other than heat shrinkage deformation. If there is no knowledge such as past results, we will experiment with elements as necessary to investigate manufacturing constraints. The requirement of the verification model of the technology is that the eigenvalue exists within ± 10% of the required frequency when the material is stainless steel and the outer surface is fixtured. We have established a process to design component characteristics by combining topology optimization considering the possible manufacturing area of the metal additive manufacturing, and the evaluation of manufacturing feasibility using a metal additive manufacturing process simulation, reflecting the experimental results of the elements. We confirmed that we can apply the development technology to the verification model and obtain a structure that can be manufactured and have the eigenvalue of the aim. In the manufacturing of the spring, it was confirmed that the manufacturing or not is different depending on the layout.