With over ten years of experience in 3d printing rapid prototyping solutions based around interactive technologies, and
a unique combination of creative and technical skills, huibao
can deliver solutions to fulfill our most demanding clients'
expectations in 3d printing rapid prototyping.
Drawing on our
in-depth knowledge gained from years of first hand experience
working in
these areas. The best way to see what we can do is to
visit our office or email us to arrange an appointment. we are
showcasing a number of new technologies to provide 40ft wide
stereoscopic 3D projection for the concept that combines a
display of the finest cars on the planet, will utilize two 16K
lumen DLP projectors and we 3d printing rapid prototyping
uncompressed stereo playback server. It will also be the first
time we deploy a brand new polarizing filter technology that
increases light transmission by more than 50% over standard
polarizing filters to achieve a super-bright image from a single
pair of projectors on such a large screen.
The term 3d printing rapid prototyping refers to a class of
technologies that can automatically construct physical models
from Computer-Aided Design (CAD) data. These "three dimensional
printers" allow designers to quickly create tangible prototypes
of their designs, rather than just two-dimensional pictures.
Such models have numerous uses. They make excellent visual aids
for communicating ideas with co-workers or customers. In
addition, prototypes can be used for design testing. For
example, an aerospace engineer might mount a model airfoil in a
wind tunnel to measure lift and drag forces. Designers have
always utilized prototypes; RP allows them to be made faster and
less expensively.
In addition to prototypes, 3d printing rapid prototyping
techniques can also be used to make tooling (referred to as
rapid tooling) and even production-quality parts (rapid
manufacturing). For small production runs and complicated
objects, rapid prototyping is often the best manufacturing
process available. Of course, "rapid" is a relative term. Most
prototypes require from three to seventy-two hours to build,
depending on the size and complexity of the object. This may
seem slow, but it is much faster than the weeks or months
required to make a prototype by traditional means such as
machining.
These dramatic time savings allow manufacturers to
bring products to market faster and more cheaply. In 1994, Pratt
& Whitney achieved "an order of magnitude [cost] reduction [and]
. . . time savings of 70 to 90 percent" by incorporating rapid
prototyping into their investment casting process. 5
At least six different rapid prototyping techniques are
commercially available, each with unique strengths. Because RP
technologies are being increasingly used in non-prototyping
applications, the techniques are often collectively referred to
as solid free-form fabrication; computer automated
manufacturing, or layered manufacturing.
The latter term is
particularly descriptive of the manufacturing process used by
all commercial techniques. A software package "slices" the CAD
model into a number of thin (~0.1 mm) layers, which are then
built up one atop another. 3d printing rapid prototyping is an
"additive" process, combining layers of paper, wax, or plastic
to create a solid object. In contrast, most machining processes
(milling, drilling, grinding, etc.) are "subtractive" processes
that remove material from a solid block. RP’s additive nature
allows it to create objects with complicated internal features
that cannot be manufactured by other means.
Of course, rapid prototyping is not perfect. Part volume is
generally limited to 0.125 cubic meters or less, depending on
the 3d printing rapid prototyping machine. Metal prototypes are
difficult to make, though this should change in the near future.
For metal parts, large production runs, or simple objects,
conventional manufacturing techniques are usually more
economical. These limitations aside, rapid prototyping is a
remarkable technology that is revolutionizing the manufacturing
process.
Although several rapid prototyping techniques exist, all employ
the same basic five-step process.
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The steps are:
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Create a CAD model of the design
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Convert the CAD model to 3d printing rapid prototyping format
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Slice the STL file into thin cross-sectional layers
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Construct the model one layer atop another
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Clean and finish the model
CAD Model Creation: First, the object to be built is modeled
using a Computer-Aided Design (CAD) software package. Solid
modelers, such as Pro/ENGINEER, tend to represent 3-D objects
more accurately than wire-frame modelers such as AutoCAD, and
will therefore yield better results. The designer can use a
pre-existing CAD file or may wish to create one expressly for
prototyping purposes. This process is identical for all of the
3d printing rapid prototyping
build techniques.
Conversion to STL Format: The various CAD packages use a number
of different algorithms to represent solid objects. To establish
consistency, the (stereo lithography, the first 3d printing
rapid prototyping
technique) format has been adopted as the standard of the rapid
prototyping industry. The second step, therefore, is to convert
the CAD file into format. This format represents a
three-dimensional surface as an assembly of planar triangles,
"like the facets of a cut jewel." 6 The file contains the
coordinates of the vertices and the direction of the outward
normal of each triangle. Because this files use planar elements,
they cannot represent curved surfaces exactly. Increasing the
number of triangles improves the approximation, but at the cost
of bigger files size.
Large, complicated files require more time
to pre-process and build, so the designer must balance accuracy
with manageability to produce a useful file. Since the 3d
printing rapid prototyping
format is universal, this process is identical for all of the
3d
printing rapid prototyping build techniques.
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