additive manufacturing
TRANSCRIPT
• Additive Manufacturing
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Additive Manufacturing File Format
1 Additive Manufacturing File Format (AMF) is an open standard for describing objects for
additive manufacturing processes such as 3D Printing. The official ISO/ASTM 52915-
13standard is an XML-based format designed to allow any computer-aided design software to describe the shape and composition of any 3D object to be fabricated on any 3D Printer. Unlike its predecessor STL format, AMF has native support for color, materials, lattices,
and constellations.
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Additive Manufacturing File Format - Design considerations
1 In order to be successful across the field of additive manufacturing, this file format was designed to address
the following concerns
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Additive Manufacturing File Format - History
1 A second factor that ushered the development of the standard was the
improving resolution of additive manufacturing technologies
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Additive Manufacturing File Format - History
1 In January 2009, a new ASTM Committee F42 on Additive
Manufacturing Technologies was established, and a design
subcommittee was formed to develop a new standard
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Additive Manufacturing File Format - History
1 During the July 2013 meetings of ASTM’s F42 and ISO’s TC261 in
Nottingham (UK), the Joint Plan for Additive Manufacturing Standards Development was approved. Since then, the AMF standard is managed
jointly by ISO and ASTM.
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Tissue engineering - Additive manufacturing
1 It might be possible to print organs, or possibly entire organisms using additive
manufacturing techniques. A recent innovative method of construction uses an ink-jet mechanism to print precise
layers of cells in a matrix of thermoreversable gel. Endothelial cells, the cells that line blood vessels, have been printed in a set of stacked rings.
When incubated, these fused into a tube.
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Additive manufacturing
1 'Additive manufacturing' or '3D Printing' is a process of making a Three-dimensional space|three-dimensional solid object of virtually any shape from a model-based definition|digital
model. 3D Printing is achieved using an additive process, where successive layers of material are laid down in different shapes. 3D Printing is also considered distinct from traditional machining
techniques, which mostly rely on the removal of material by methods such as cutting or drilling
(subtractive processes).
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Additive manufacturing - Terminology
1 The term additive manufacturing refers to technologies that create objects through
sequential layering. Objects that are manufactured additively can be used anywhere
throughout the product life cycle, from pre-production (i.e. rapid prototyping) to full-scale
production (i.e. rapid manufacturing), in addition to tooling applications and post-production customization.ASTM F2792-10
Standard Terminology for Additive Manufacturing Technologies
[http://www.astm.org ASTM International].
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Additive manufacturing - Terminology
1 The term subtractive manufacturing is a retronym developed in recent years to distinguish it from newer
additive manufacturing techniques
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Additive manufacturing - Modeling
1 Additive manufacturing takes virtual models (3D blueprints) from computer aided design
(CAD) or 3D animation|animation 3D modeling software|modeling software and
slices them into digital cross-sections for the machine to successively use as a guideline
for printing. Depending on the machine used, material or a binding material is deposited on the build bed or platform until material/binder layering is complete and the final 3D model
has been printed.
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Additive manufacturing - Printing
1 Traditional techniques like injection molding can be less expensive for
manufacturing polymer products in high quantities, but additive manufacturing can be faster, more flexible and less expensive when producing relatively small quantities
of parts. 3D printers give designers and concept development teams the ability to produce parts and concept models using a
desktop size printer.
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Additive manufacturing - Finishing
1 Some additive manufacturing techniques are capable of using
multiple materials in the course of constructing parts. Some are able to
print in multiple colors and color combinations simultaneously. Some also utilize supports when building.
Supports are removable or dissolvable upon completion of the
print, and are used to support overhanging features during
construction.
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Additive manufacturing - Granular materials binding
1 Electron beam melting (EBM) is a similar type of additive
manufacturing technology for metal parts (e.g. titanium alloys). EBM
manufactures parts by melting metal powder layer by layer with an
electron beam in a high vacuum. Unlike metal sintering techniques that operate below melting point,
EBM parts are fully dense, void-free, and very strong.
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Additive manufacturing - Industry use
1 As of October 2012, Stratasys, the result of a merger of an American and an Israeli company, now sells
additive manufacturing systems that range from $2,000 to $500,000;
General Electric uses the high-end model to build parts for turbines, one example of GE's commitment of in-
house investment of more than $1billion on the technology.
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Additive manufacturing - Applications
1 With technological advances in additive manufacturing, however,
and the dissemination of those advances into the business world, additive methods are moving ever further into the production end of
manufacturing in creative and sometimes unexpected ways
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Additive manufacturing - Effects of 3D printing
1 Advocates of additive manufacturing also predict that this arc of
technological development will counter globalisation, as end users
will do much of their own manufacturing rather than engage in
trade to buy products from other people and corporations
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