3D-Printing and Stereolithography powerful manufacturing tools for textured or high-precision 3D city models

Transcription

1 3D-Printing and Stereolithography powerful manufacturing tools for textured or high-precision 3D city models Carsten Tille & Hermann Seitz caesar, Bonn (Germany)

2 Rapid Prototyping Layer-by-layer fabrication of threedimensional physical models directly from computer datasets 1 3D-(CAD)-Modell 2 Schichtdarstellung Slicing (Slicen) 3 4 Reales Physical Modell model Rapid-Prototyping-Prozess process (Generierung und Addition der Stereolithography Einzelschichten) 3D Printing June 22, 2005 Dr.-Ing. Carsten Tille [ca e sa r] 1 of 14

3 Application of RP models Concept models Functional models Tooling Casting Manufacturing Source: Phonak AG, Phonak Schweiz June 22, 2005 Dr.-Ing. Carsten Tille [ca e sa r] 2 of 14

4 Stereolithography x-y-scanner UV Laser Lens Recoating Platform Cured Resin = 3D Model Liquid Photoresin High resolution and standard SLA (1-250 mm 3 ) Smallest feature < 20 microns VIPER Si, 3D Systems June 22, 2005 Dr.-Ing. Carsten Tille [ca e sa r] 3 of 14

5 3D printing Dr. Carsten Tille, caesar, Bonn (Germany) Plaster material Color printer Z406, ZCorp June 22, 2005 Dr.-Ing. Carsten Tille [ca e sa r] 4 of 14

6 Acquisition of 3D datasets Forward Engineering Reverse Engineering Generation of volume or surface datasets (e.g. CAD) 3D surface STL format Layer representation (CLI) digitalization (e.g. laser scanning computer tomography) Rapid Prototyping June 22, 2005 Dr.-Ing. Carsten Tille [ca e sa r] 5 of 14

7 Volume representation and triangulation (STL) STL facet based surface representation approximate surface/solid entities list of facet data (unit normal plus three vertices) June 22, 2005 Dr.-Ing. Carsten Tille [ca e sa r] 6 of 14

8 STL errors Dr. Carsten Tille, caesar, Bonn (Germany) known problems: closed surfaces ( leaky models) triangle logics errors ( flipped triangles, bad edges, contours, shells ) caused by: converter (export filter) solid model setup June 22, 2005 Dr.-Ing. Carsten Tille [ca e sa r] 7 of 14

9 STL errors Dr. Carsten Tille, caesar, Bonn (Germany) Converted shell to parts June 22, 2005 Dr.-Ing. Carsten Tille [ca e sa r] 8 of 14

10 Architectural model Aachener Straße Colored STL file 3D printing Heinrich Geerling, architect, St. Augustin June 22, 2005 Dr.-Ing. Carsten Tille [ca e sa r] 9 of 14

11 Digital terrain model Zeche Zollverein Stadt Essen, Amt 62, Gruppe Geoinformation stereolithography model 3D printing model VRML file June 22, 2005 Dr.-Ing. Carsten Tille [ca e sa r] 10 of 14

12 Winding tower Zeche Zollverein stereolithography model Stadt Essen, Amt 62, Gruppe Geoinformation June 22, 2005 Dr.-Ing. Carsten Tille [ca e sa r] 11 of 14

13 3D model German building land prices VRML file 3D printing model Bundesamt für Bauwesen und Raumordnung June 22, 2005 Dr.-Ing. Carsten Tille [ca e sa r] 12 of 14

14 Digital terrain model Siebengebirge 3D printing model JPG, VRML file Landesvermessungsamt Nordrhein- Westfalen June 22, 2005 Dr.-Ing. Carsten Tille [ca e sa r] 13 of 14

15 Rapid Prototyping Pros and Cons 3D printing: Use 3D printing for: + Full-color models Colored models + Fast, cost-effective technology Multiple replica Restricted stability Stereolithography: + High precision + mechanical stability + Translucent material Expensive technology Use Stereolithography for: High quality replica Small feature preservation June 22, 2005 Dr.-Ing. Carsten Tille [ca e sa r] 14 of 14

16 Advertisement ;-) Currently we offer commercial services. service bureau for prototyping and small series production product label 3mat + info@3mat.de tille@caesar.de June 22, 2005 Dr.-Ing. Carsten Tille [ca e sa r] 15 of 14