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A typical application for 3D digitization is the recording of the actual
shape of a physically existing model during the design and product development
phase. The mobile ATOS II XL system provides for a time-saving and flexible
performance of this task. The measuring results in form of high-resolution
triangulated meshes can easily be manipulated and processed.
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2D design of Professor Kelly
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The RIVAGE
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The present case study "RIVAGE" is the result of a joint project
carried out by the following companies: ITH Technik GmbH, Steinbeis-Transferzentrum
Automotive Styling and Design, Tebis AG and GOM mbH. This case study documents
the development of the RIVAGE show car. It took only seven months to turn
the first draft into a drivable concept car which, for the first time,
was presented in public at the Euromold in 2002.
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Scanning of the vehicle body
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STL mesh of the vehicle body
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The project was based on a Porsche Carrera 911 on the body of which
the RIVAGE was built. To create the package model for the design, a 1:4
copy of the vehicle was required. For this purpose the ATOS II XL system
was used for the first time. Conventional measuring methods hardly allow
for digitizing such complex geometries. However, the flexible ATOS scanner
with its high spatial mobility allows for quick imaging of highly complex
objects almost in their entirety without sacrificing details. Just four
hours later, the digitized data was available in STL format. The mesh
could easily be imported in the Tebis system, it was edited, reduced by
a scale of 1:4 and processed into milling paths.
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Working on the design model
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Scanning the design model
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After the milling of the package model was finished, the design could
then be modeled in clay. In order to increase the approved 1:4 design
model to a 1:1 model, it was digitized again. For this purpose, the 1:4
model needed to be scanned in highest quality because any error would
be four times more obvious per main direction in the later model on a
scale of 1:1. Here, the 3D scanning system ATOS proved its power again.
Thanks to its ingenious projection technology, such models can be scanned
with an accuracy of 0.01 mm.
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Tape lines mark the course of
the joints on the 1:1 model
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Using the feature line module, the tape lines
can be digitized without any problems
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The 1:1 model, approved after some major modifications, then challenged
the digitization technology again. First, the model needed to be scanned
with highest accuracy because the mounting parts of the concept car were
manufactured based on this data. In addition, the path of the joints marked
with tapes needed to be digitized as well. Here, the convenient feature
line module of the ATOS software was used. The software can easily extract
such characteristic lines from the measuring data recorded anyway for
surface digitization and provides these data as VDA or IGES point cloud.
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STL mesh an tape lines of the 1:1 model
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The RIVAGE on the Hockenheimring
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From these data the mounting parts were produced, all manufactured in
a special laminate sandwich technology, a specialty of ITH GmbH. Necessary
mounting elements could be added in the Tebis system to the existing STL
meshed by means of additional surfaces. The finishing works could be terminated
on time with respect to the predefined date and thus the RIVAGE was presented
to the public at the Euromold. All four participating companies have an
equal part in carrying out this project in just seven months from the
first design to the ready and drivable show car. This proves how complex
processing chains in today's production technology can be optimized using
most modern and advanced technology.
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