Additive Manufacturing Technologies

Stampfl, Jürgen; Hatzenbichler, Markus

doi:10.1007/978-3-642-20617-7_6492

Cited by 12 publications

(8 citation statements)

References 3 publications

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“…To overcome these drawbacks, additive manufacturing (AM) techniques such as fused deposition modeling (FDM) may be applied to the die manufacturing process, as their geometrical limitations are most likely to be restricted to the size of the building chamber. Additionally, AM enables a high level of geometrical freedom and flexibility due to its process [17]. Over the past decade the impact of AM has increased rapidly, next to their process and lead-times.…”

Section: Introductionmentioning

confidence: 99%

3D printed prototyping tools for flexible sheet metal drawing

Frohn-Sörensen

Geueke

Tuli

et al. 2021

Int J Adv Manuf Technol

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Due to the change from mass production to mass personalized production and the resulting intrinsic product flexibility, the automotive industry, among others, is looking for cost-efficient and resource-saving production methods to combining global just-in-time production. In addition to geometric manufacturing flexibility, additive manufacturing offers a resource-saving application for rapid prototyping and small series in predevelopment. In this study, the FDM process is utilized to manufacture the tooling to draw a small series of sheet metal parts in combination with the rubber pad forming process. Therefore, a variety of common AM polymer materials (PETG, PLA, and ABS) is compared in compression tests, from which PLA is selected to be applied as sheet metal forming die. For the rubber pad forming process, relevant processing parameters, i.e., press force and rubber cushion hardness, are studied with respect to forming depth. The product batch is examined by optical evaluation using a metrological system. The scans of the tool and sheet metal parts confirm the mechanical integrity of the additively manufactured die from polymer and thus the suitability of this approach for small series in sheet metal drawing processes, e.g., for automotive applications.

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Section: Introductionmentioning

confidence: 99%

3D printed prototyping tools for flexible sheet metal drawing

Frohn-Sörensen

Geueke

Tuli

et al. 2021

Int J Adv Manuf Technol

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“…It integrates multidisciplinary fields including information technology, novel material technology and manufacturing technology [3]. Compared to conventional manufacturing processes, AM processes have many perceived advantages, such as high material and resource efficiency, good part flexibility and production flexibility, economic and environmental friendly [4,5].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of 18Ni-300 Maraging Steel Fabricated by Selective Laser Melting

Tan¹,

Zhou²,

Tong³

et al. 2016

Proceedings of the 2016 6th International Conference on Advanced Design and Manufacturing Engineering (ICADME 2016)

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High-strength 18Ni-300 maraging steel parts were fabricated by selective laser melting (SLM) additive manufacturing. Aging treatment at 490 ºC for 6 hours was applied for improving the mechanical properties of SLM fabricated parts. The microstructure and properties of the as-fabricated SLM 18Ni-300 parts were carefully characterized and analyzed. The results show that the relatively low surface roughness, with 4.16μm for horizontal surface and 4.79μm for vertical surface, certified the high accuracy of forming process. The almost fully dense microstructures of the as-fabricated SLM specimens were consisted of sub-micron dendritic cellular structures for horizontal cross-section and elongated acicular structures for vertical cross section. Due to precipitated-phase strengthening, the hardness increased from 35~36 HRC to 51~55 HRC after heat treatment. Meanwhile, the ultimate tensile strength (Rm) increases from 1165 MPa to 2014 MPa, which increased by about 73%; while the break elongation (ε) was reduced from 12.44% to 3.28%, owing to the increased embrittlement caused by the heat treatment. The substantial plastic deformation and dispersively distributed dimples in the fracture morphologies indicated a ductile fracture of as-fabricated tensile specimens, while the age-hardened tensile specimen encountered with a main fracture mode of brittle fracture.

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“…8 During 3D printing the ceramic resin is photo-polymerised and then a cure is applied; this technique is called stereolithography. 9 During this phase the maximal thickness should be 5mm to be sure that all the ceramic resin is cured, the lightweighting design offers a large surface area which aids cure, but in addition, it also minimises mass for launch weight restrictions. The most challenging point is this design is that the lightweight structure should impact as little as possible the deformation on the mirror substrate and still provide prefect off axis parabola.…”

Section: Wfirst Second Off Axis Parabola Designmentioning

confidence: 99%