CAD has traditionally been used as a drafting tool for 2dimensional product representation' More rec

1
Product Conceptualizing using 3D Computer Aided
Design (CAD) Modeling Techniques, BioCAD Rapid
Prototyping (RP) Technologies
Computer Aided Design/BioCAD
Rapid Prototyping
The use of computer programs and systems to
design detailed two- or three-dimensional models
of physical objects, such as mechanical parts,
buildings, and molecules (www.dictionary.com)
The creation of a working model of a software
module to demonstrate the feasibility of the
function. The prototype is later refined for
inclusion in a final product. (www.dictionary.com
)
CAD has traditionally been used as a drafting
tool for 2-dimensional product representation.
More recently, 3-dimensional solid modeling has
become the norm. Solid models portray life-like
renderings and can be analysed for stress and
clearances. BioCAD modeling is useful in various
medical applications
Rapid prototyping uses an additive/subtractive
process where the intended object is built up
from numerous thin layers of material through
polymerization, extrusion or printing techniques
. It is also referred to as Layered
Manufacturing and Solid Freeform Fabrication.
Product Conceptualization Using CAD RP
BioCAD Modeling for Medical Applications
Tissue Replacement
Bone void resulting from a tumor removal
CT Scan Data of Human Skull
3D Models Created from CT Data
Stress Analysis

• Product Design The individual product parts are
  designed using modern 3D solid modeling CAD
  software, in this case AutoDesk Inventor. The
  Advantages of using this modeling process are
• Designers work with a life like model that
  can be shades to represent various materials and
  animated for motion.
• The models can be analyzed for various factors
  such as stress and motion interference.

Product Ideation A problem is identified, the
scope of the problem analyzed, design parameters
are set, possible solutions are discussed, a
design plan is initiated
Motion Analysis
Conversion to .STL File
Fabrication of Tissue Replacement Using RP
Slicing the .STL file
Prototyping The completed parts are then
converted to a sterolithography (.stl) file,
which is sliced into extremely thin layers. The
RP machine will print one layer at a time until
the entire part has been completed.
Poster Designed by Nate Bender, Souderton Area
High School Drexel
Engineering RET, Summer 2006
Completed Model