Challenges and Approaches for Metrology of Additive Manufactured Lattice Structures by Industrial X-Ray Computed Tomography

2021 ◽  
Vol 1161 ◽  
pp. 131-136
Author(s):  
Philip Sperling ◽  
Anton du Plessis ◽  
Gerd Schwaderer
Keyword(s):  
Additive Manufacturing ◽  
Production Method ◽  
Detailed Examination ◽  
Design Element ◽  
Lattice Structures ◽  
New Production ◽  
X Ray ◽  
Industrial Ct ◽  
X Ray Computed ◽  
Manufacturing Technologies

Lattice structures can be highly complex imitating natural cellular materials. By the wide adoption of additive manufacturing technologies, lattice structures are a popular design element with many advantages for lightweight and highly functional parts. A detailed examination and an intense inspection of this type of new design element and this new production method is necessary to enable a broad industrialization. In this study we demonstrate how to use x-ray based industrial CT to measure lattice structures in additive manufacturing. This paper shows certain challenges and approaches for metrology on lattice structures. The results show significant deviations between designed and built parts, highlighting the need for quantification and non-destructive inspection.

Additive Manufacturing in Jewellery Design

2012 ◽  
Author(s):  
Telma Ferreira ◽  
Henrique A. Almeida ◽  
Paulo J. Bártolo ◽  
Ian Campbell
Keyword(s):  
Additive Manufacturing ◽  
New Technologies ◽  
Selective Laser Sintering ◽  
Production Method ◽  
Market Demand ◽  
Labor Costs ◽  
Product Complexity ◽  
New Production ◽  
Advantages And Disadvantages ◽  
Manufacturing Technologies

Additive manufacturing has become a well-known and widely used process among engineers and designers within the past decade to respond to high levels of market demand and product complexity. The jewellery industry still works essentially on traditional fabrication methods to much time consuming and in some cases lacking efficiency compared to the quality of the end product. The inclusion of new technologies can be a solution to overcome these issues. Additive fabrication enables the fabrication of new products and geometries reducing manufacturing time, energy and labor costs. This paper discusses the advantages and disadvantages of traditional manufacturing processes, such as Investment Casting, and proposes a new production method based on the use of advanced modeling and additive manufacturing. Three additive manufacturing technologies were used, such as selective laser sintering, stereolithography and 3D printing. A computational application for jewellery design is also presented to help manufactures and customers to fabricate novel jewellery pieces. This tool is based on a customization concept, which has been of increasing interest during recent years.

scholarly journals Effect of Porosity on Mechanical Properties of 3D Printed Polymers: Experiments and Micromechanical Modeling Based on X-Ray Computed Tomography Analysis

Polymers ◽  
2019 ◽  
Vol 11 (7) ◽  
pp. 1154 ◽  
Author(s):  
Wang ◽  
Zhao ◽  
Fuh ◽  
Lee
Keyword(s):  
Computed Tomography ◽  
Mechanical Properties ◽  
Additive Manufacturing ◽  
Fused Deposition Modeling ◽  
Micromechanical Model ◽  
Micromechanical Modeling ◽  
X Ray ◽  
Fused Deposition ◽  
3D Printed ◽  
X Ray Computed

Additive manufacturing (commonly known as 3D printing) is defined as a family of technologies that deposit and consolidate materials to create a 3D object as opposed to subtractive manufacturing methodologies. Fused deposition modeling (FDM), one of the most popular additive manufacturing techniques, has demonstrated extensive applications in various industries such as medical prosthetics, automotive, and aeronautics. As a thermal process, FDM may introduce internal voids and pores into the fabricated thermoplastics, giving rise to potential reduction on the mechanical properties. This paper aims to investigate the effects of the microscopic pores on the mechanical properties of material fabricated by the FDM process via experiments and micromechanical modeling. More specifically, the three-dimensional microscopic details of the internal pores, such as size, shape, density, and spatial location were quantitatively characterized by X-ray computed tomography (XCT) and, subsequently, experiments were conducted to characterize the mechanical properties of the material. Based on the microscopic details of the pores characterized by XCT, a micromechanical model was proposed to predict the mechanical properties of the material as a function of the porosity (ratio of total volume of the pores over total volume of the material). The prediction results of the mechanical properties were found to be in agreement with the experimental data as well as the existing works. The proposed micromechanical model allows the future designers to predict the elastic properties of the 3D printed material based on the porosity from XCT results. This provides a possibility of saving the experimental cost on destructive testing.

scholarly journals Multi-Criteria Comparative Analysis of the Use of Subtractive and Additive Technologies in the Manufacturing of Offshore Machinery Components

2020 ◽  
Vol 27 (3) ◽  
pp. 71-81
Author(s):  
Mariusz Deja ◽  
Mieczysław Stanisław Siemiątkowski ◽  
Dawid Zieliński
Keyword(s):  
Additive Manufacturing ◽  
Production Method ◽  
Industrial Applications ◽  
Lead Times ◽  
Efficient Production ◽  
Cnc Milling ◽  
Analytic Hierarchy ◽  
3D Printed ◽  
Offshore Industry ◽  
Manufacturing Technologies

AbstractThe dynamic development of additive manufacturing technologies, especially over the last few years, has increased the range of possible industrial applications of 3D printed elements. This is a consequence of the distinct advantages of additive techniques, which include the possibility of improving the mechanical strength of products and shortening lead times. Offshore industry is one of these promising areas for the application of additive manufacturing. This paper presents a decision support method for the manufacturing of offshore equipment components, and compares a standard subtractive method with an additive manufacturing approach. An analytic hierarchy process was applied to select the most effective and efficient production method, considering CNC milling and direct metal laser sintering. A final set of decision criteria that take into account the specifics of the offshore industry sector are provided.

Electrochemical Defect Analysis (EC-D) of Additive Manufactured Components

2021 ◽  
Author(s):  
Florian Sous ◽  
Tim Herrig ◽  
Thomas Bergs ◽  
Florian Karges ◽  
Nicole Feiling ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Quality Control ◽  
Additive Manufacturing ◽  
Electrochemical Machining ◽  
Layer By Layer ◽  
Defect Analysis ◽  
Test Rig ◽  
Camera System ◽  
X Ray ◽  
Manufacturing Technologies

Abstract Due to more freedom in design and flexibility in production, parts produced by additive manufacturing technologies (AM) offer a huge potential for the manufacture of turbomachinery components. Because of the layer by layer built structure, internal defects like cracks or gaseous pores can occur. These defects considerably reduce the mechanical properties and increase the importance of quality control, especially in the field of turbomachinery. Therefore, in this study, an electrochemical defect analysis (EC-D) of additive manufactured components is introduced, performed and validated in comparison to a nondestructive X-ray testing of the same part. A test rig was developed, which allows an alternation between electrochemical machining and subsequent optical documentation of each removed layer. The documentation of the surface and the macroscopic defects in the AM-parts are captured by an integrated camera system.

New Production Method by Additive Manufacturing and the Future Possibility

2015 ◽  
Vol 56 (649) ◽  
pp. 118-123
Author(s):  
Mituru ADACHI ◽  
Kenya KURITA ◽  
Yoshihiko NAGATA ◽  
Syuji KOIWAI
Keyword(s):  
Additive Manufacturing ◽  
Production Method ◽  
New Production ◽  
Future Possibility ◽  
The Future
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