Many-objective optimization of build part orientation in additive manufacturing
- PDF / 2,257,254 Bytes
- 16 Pages / 595.224 x 790.955 pts Page_size
- 21 Downloads / 168 Views
ORIGINAL ARTICLE
Many-objective optimization of build part orientation in additive manufacturing Marina A. Matos1 · Ana Maria A. C. Rocha1
· Lino A. Costa1
Received: 20 July 2020 / Accepted: 5 November 2020 © Springer-Verlag London Ltd., part of Springer Nature 2020
Abstract Additive manufacturing is the process of building a three-dimensional object from a computer-aided design model, by successively adding material layer-by-layer. This technology allows to print complex shape objects and is being rapidly adopted throughout the aircraft industry, medical implants, jewelry, footwear industry, automotive industry, and fashion products. The build orientation of 3D objects has a strong influence on many quality characteristics. In this paper, a manyobjective approach is applied to the Fin model, using the NSGA-II algorithm to optimize four conflicting objective functions regarding the need for support structures, the build time, the surface roughness, and the overall quality of the surface. First, a bi-objective optimization is performed for each couple of two objectives and some representative solutions are identified. However, when applying many-objective optimization to the four objective functions simultaneously, some more orientation angles are found as good optimal solutions. Visualization tools are used to inspect the relationships and the trade-offs between the objectives. Then, the decision-maker can choose which orientation angles are more favorable according to his/her preferences. The optimal solutions found confirmed the effectiveness of the proposed approach. Keywords Additive manufacturing · 3D printing · Multi-objective optimization · Build orientation
1 Introduction Additive manufacturing (AM) is a process that builds 3D objects, from 3D model data, by adding layer-by-layer of material. AM uses a wide variety of construction materials, such as plastic, resin, rubber, ceramics, glass, concrete, and metal. One of the greatest benefits of AM is the production of a wide range of shapes. The reduction of the development time of a prototype model in an additive manufacturing process is one of the current challenges faced by the manufacturing industries. Recently, AM is being used to fabricate end-use products in several areas, such as
Ana Maria A. C. Rocha
[email protected] Marina A. Matos [email protected] Lino A. Costa [email protected] 1
ALGORITMI Center, University of Minho, 4710-057, Braga, Portugal
aircraft, dental restorations, medical implants, automobiles, and fashion products [1, 2]. The main concern in AM is the quality of the processed part. Poor surface finish is one of the major limitations in additive manufactured parts. It can be affected by different factors, from pre-processing, processing, and postprocessing steps. The poor surface finish in AM processes can be affected by the tessellation of the original computeraided design (CAD) model and the slicing procedure used during the building process. Although a reduction in the layer thickness may cause an improvement in the su
Data Loading...
