Additive Manufacturing Flashcards
The key concept of Additive Manufacturing is that the process ___________ parts gradually under full ___________
builds up, digital control
Early materials were low-quality ___________, but principle has advanced to the point where high quality ___________, _______ and _______ are being used
plastics, polymers, metals, ceramics
AM offers very good _____________and requires ______ product-specific parts the underlying technology was invented in the ____________
Form freedom, no, 1980s
Typical AM layer thickness is ______________
100 Micrometers
A CAD model is exported into a “____________________________” (STL) file which represents the boundary of the material as _______
Standard Tessellation language, Triangles
What standard is used to classify AM terminology?
ASTM
The Seven Sub Principles of AM are:
1. ________________
2. ________________
3. ________________
4. ________________
5. ________________
6. ________________
7. ________________
Powder bed fusion, Vat photo-polymerization, material jetting, material extrusion, sheet lamination, binder jetting, direct energy deposition.
What is the most important AM method for manufacturing?
Powder Bed Fusion
A powder bed fusion company called _______ is the leader in the technology and calls their process “_________________________”
EOS, Direct metal laser sintering,
___________ involves joining materials together by heating them to a point below their melting temperature
Sintering
In Powder Bed Fusion, The ____________ powder remains in place, can serve as support, and can be easily ___________ after the process
un-sintered, removed
In Powder Bed Fusion, surface properties are generally _______ and __________
grainy, rough,
Powder Bed Fusion parts can be used in _____________ applications, but material properties are not as good as in parts made using traditional methods
Load Bearing
What AM process is the oldest? (1986)
Vat photo-polymerization
Vat photo-polymerization is also known as_________________
Stereo-Lithography
_________________ is Similar to Powder bed Fusion but instead uses a ____________ to cure a monomer dissolved in a solvent.
Vat photo-polymerization, UV Laser
Compared to powder bed
fusion, Vat photo-polymerization offers:
o _________________
o _________________
o _________________
Higher quality surfaces, Faster process times, Cheaper Equipment
In ___________________ individual droplets of
material are deposited _________________
Material Jetting, layer by layer
The main company producing Material Jetting is ________
Objet
Material Jetting typical has 2 ______ and uses a Viscous ________________________ resin that is cured with high intensity UV light
Heads, Thermosetting
What is Material Jetting’s main advantage?
Ability to combine materials (Requires 3 heads)
What AM method is the most common method for DIY and home use?
Material Extrusion
___________________uses a roll of thin sheet material that is coated with an adhesive. Successive layers are then cut out in a desired Shape and Stacked to build the part
Sheet Lamination
In Sheet lamination, input materials can theoretically be ________, ________ or even _________, but so far the only available commercial equipment operates on paper. The process can create large parts, but surface finish is poor and the process creates a lot of waste.
paper, plastic, metal
In ___________________ , a liquid adhesive is selectively applied to join powder materials such as _________ or _________
Binder Jetting, gypsum, starch
The key company developing Binder Jetting
technology is ____________
zPrinter
Binder Jetting products are ___________ and mostly used for ___________. The term “3D printing” used to apply to only this process
semi-structural, mockups
_______________ deposits the material at the same time that it __________ it together and eliminates the need for _______________ and manufacturing in horizontal layers.
Direct Energy Deposition, Sinters, powder beds
_____________________ offers the ability to add onto existing parts and has very good material properties and no porosity
Direct Energy Composition
______________ is where material properties in horizontal direction are _________ than vertical direction
anisotropy, different
How does anisotropy affect AM?
Properties within the layers are different than properties between the layers
What are the 4 challenges of AM?
Material Anisotropy, Varying Cad files, Part Certification, Cost
AM has been used to supply temporary, small volume and highly optimized parts and is being considered for making __________ parts in the field.
spare
