Additive Manufacturing Flashcards

1
Q

The key concept of Additive Manufacturing is that the process ___________ parts gradually under full ___________

A

builds up, digital control

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2
Q

Early materials were low-quality ___________, but principle has advanced to the point where high quality ___________, _______ and _______ are being used

A

plastics, polymers, metals, ceramics

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3
Q

AM offers very good _____________and requires ______ product-specific parts the underlying technology was invented in the ____________

A

Form freedom, no, 1980s

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4
Q

Typical AM layer thickness is ______________

A

100 Micrometers

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5
Q

A CAD model is exported into a “____________________________” (STL) file which represents the boundary of the material as _______

A

Standard Tessellation language, Triangles

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6
Q

What standard is used to classify AM terminology?

A

ASTM

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7
Q

The Seven Sub Principles of AM are:
1. ________________
2. ________________
3. ________________
4. ________________
5. ________________
6. ________________
7. ________________

A

Powder bed fusion, Vat photo-polymerization, material jetting, material extrusion, sheet lamination, binder jetting, direct energy deposition.

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8
Q

What is the most important AM method for manufacturing?

A

Powder Bed Fusion

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9
Q

A powder bed fusion company called _______ is the leader in the technology and calls their process “_________________________”

A

EOS, Direct metal laser sintering,

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10
Q

___________ involves joining materials together by heating them to a point below their melting temperature

A

Sintering

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11
Q

In Powder Bed Fusion, The ____________ powder remains in place, can serve as support, and can be easily ___________ after the process

A

un-sintered, removed

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12
Q

In Powder Bed Fusion, surface properties are generally _______ and __________

A

grainy, rough,

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13
Q

Powder Bed Fusion parts can be used in _____________ applications, but material properties are not as good as in parts made using traditional methods

A

Load Bearing

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14
Q

What AM process is the oldest? (1986)

A

Vat photo-polymerization

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15
Q

Vat photo-polymerization is also known as_________________

A

Stereo-Lithography

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16
Q

_________________ is Similar to Powder bed Fusion but instead uses a ____________ to cure a monomer dissolved in a solvent.

A

Vat photo-polymerization, UV Laser

17
Q

Compared to powder bed
fusion, Vat photo-polymerization offers:
o _________________
o _________________
o _________________

A

Higher quality surfaces, Faster process times, Cheaper Equipment

18
Q

In ___________________ individual droplets of
material are deposited _________________

A

Material Jetting, layer by layer

19
Q

The main company producing Material Jetting is ________

20
Q

Material Jetting typical has 2 ______ and uses a Viscous ________________________ resin that is cured with high intensity UV light

A

Heads, Thermosetting

21
Q

What is Material Jetting’s main advantage?

A

Ability to combine materials (Requires 3 heads)

22
Q

What AM method is the most common method for DIY and home use?

A

Material Extrusion

23
Q

___________________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

A

Sheet Lamination

24
Q

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.

A

paper, plastic, metal

25
In ___________________ , a liquid adhesive is selectively applied to join powder materials such as _________ or _________
Binder Jetting, gypsum, starch
26
The key company developing Binder Jetting technology is ____________
zPrinter
27
Binder Jetting products are ___________ and mostly used for ___________. The term “3D printing” used to apply to only this process
semi-structural, mockups
28
_______________ 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
29
_____________________ offers the ability to add onto existing parts and has very good material properties and no porosity
Direct Energy Composition
30
______________ is where material properties in horizontal direction are _________ than vertical direction
anisotropy, different
31
How does anisotropy affect AM?
Properties within the layers are different than properties between the layers
32
What are the 4 challenges of AM?
Material Anisotropy, Varying Cad files, Part Certification, Cost
33
AM has been used to supply temporary, small volume and highly optimized parts and is being considered for making __________ parts in the field.
spare