Additive Manufacturing (AM) Quiz

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Questions and Answers

In Fused Deposition Modeling (FDM), the filament is melted in a ______ that moves in XY direction.

nozzle

In FDM, molten plastic is then extruded from the ______ and then deposited on the build platform.

nozzle

In FDM, the molten plastic is deposited on the ______ in layers until the part is finished.

build platform

In Stereolithography (SLA), the ______ traces the path of the geometry/pattern that is being produced.

Laser Signup and view all the answers

In SLA, the resin hardens after ______ exposure.

laser Signup and view all the answers

Fused Deposition Modeling (FDM) is a type of ______ technology.

Additive Manufacturing Signup and view all the answers

In FDM, the plastic is melted and deposited in ______ on the build platform.

layers Signup and view all the answers

The build platform is a part of the ______ process in FDM.

FDM Signup and view all the answers

Stereolithography (SLA) is a type of ______ technology.

Additive Manufacturing Signup and view all the answers

Additive Manufacturing refers to a class of technologies that can automatically construct physical models from ______ data.

Computer-Aided Design (CAD) Signup and view all the answers

Additive Manufacturing is synonymous to ______ printing.

3D Signup and view all the answers

The first techniques for rapid prototyping became available in the late ______.

1980s Signup and view all the answers

In Additive Manufacturing, physical models are formed by adding ______ layer by layer.

materials Signup and view all the answers

The application of Additive Manufacturing in the ______ industry is one of the many uses of this technology.

Automotive Signup and view all the answers

The ______ stage of the Additive Manufacturing process involves creating a geometric model.

first Signup and view all the answers

Additive Manufacturing is used in ______ applications such as creating prosthetics and implants.

Bioengineering Signup and view all the answers

The ______ stage of the Additive Manufacturing process involves slicing the model into thin cross-sectional layers.

third Signup and view all the answers

The software ______ is used for Geometric Modeling.

Pro/Engineer Signup and view all the answers

According to the Wohlers Report 2021, ______ percent of Additive Manufacturing applications are for end use parts.

32 Signup and view all the answers

Tessellation is a process of dividing a ______ into smaller units.

surface Signup and view all the answers

The process of ______ involves dividing a 3D model into 2D layers.

Slicing Signup and view all the answers

RP machines build one layer at a time during the process of ______ of Layers.

constructing Signup and view all the answers

The final step in 3D printing is ______ and Finishing.

Cleaning Signup and view all the answers

Fusion360 is a software used for ______ Modeling.

Geometric Signup and view all the answers

SolidWorks is a software used for ______ Modeling.

Geometric Signup and view all the answers

The University of the Philippines ______ is the department that teaches Geometric Modeling.

Diliman Signup and view all the answers

The department that teaches Geometric Modeling is the ______ of Mechanical Engineering.

Department Signup and view all the answers

Laminated Object Manufacturing is a type of ______ process.

manufacturing Signup and view all the answers

Electron Beam Melting is a process wherein parts are formed by melting ______ powder layer per layer with an electron beam.

metal Signup and view all the answers

Titanium alloys are widely used in Electron Beam Melting technology which makes it a suitable ______ for medical implant market.

choice Signup and view all the answers

Electron Beam Melting has a ______ layer thickness of at least 0.05mm.

minimum Signup and view all the answers

Electron Beam Melting is used in the production of ______ parts.

aerospace Signup and view all the answers

High quality ______ melting enables high material properties in Electron Beam Melting.

vacuum Signup and view all the answers

The vacuum requirement in Electron Beam Melting entails additional ______.

costs Signup and view all the answers

Electron Beam Melting is applicable to ______, ceramics, and composites.

metals Signup and view all the answers

Electron Beam Melting is a ______ process.

precise Signup and view all the answers

The ______ is lowered and a new layer of powder is spread.

fabrication bed Signup and view all the answers

SLS polyamide (nylon) material enables full functional ______ production.

prototype Signup and view all the answers

High shrinkage ratios can result in ______, bending, or dimensional inaccuracy.

torsion Signup and view all the answers

Rubber like parts can be manufactured directly from ______ for seals and sealing elements.

polymer Signup and view all the answers

SLS feature details are not precise as in ______ parts.

SLA Signup and view all the answers

Glass-filled nylon is resistant to high ______ and chemical environments.

temperature Signup and view all the answers

The surface finish of SLS parts are not good as ______ parts.

SLA Signup and view all the answers

A layer of ______ is placed in the fabrication bed.

powder Signup and view all the answers

High power laser ______ the powder that it traced.

fuses Signup and view all the answers

What is the main advantage of Laminated Object Manufacturing (LOM) in terms of material costs?

Low cost due to readily available raw material Signup and view all the answers

What is the main limitation of Laminated Object Manufacturing (LOM) in terms of part complexity?

Production of complex parts is difficult Signup and view all the answers

What is the main difference between SLA and SLS in terms of surface finish?

SLA has a better surface finish than SLS Signup and view all the answers

What is the main advantage of using SLS polyamide (nylon) material for production?

Enables full functional nylon production Signup and view all the answers

What is a characteristic of SLS polyamide (nylon) material?

Full functional production Signup and view all the answers

What is the main application of Lompoxy material?

Used for LOM usage Signup and view all the answers

What is a material used in Laminated Object Manufacturing?

Paper Signup and view all the answers

What is the main advantage of using rubber-like parts manufactured directly from SLS for high-temperature applications?

They are resistant to high temperature and chemical environments Signup and view all the answers

What is a difference between SLA and SLS surface finish?

SLS has a rougher finish Signup and view all the answers

What is the main property of Glass-filled nylon material?

Resistant to high temperature and chemical environments Signup and view all the answers

What is an application of 3D printed rubber-like parts?

High-temperature applications Signup and view all the answers

What is a characteristic of Lompoxy material?

Chemical resistance Signup and view all the answers

What is a limitation of SLS parts?

Poor surface finish Signup and view all the answers

What is a step in the Electron Beam Melting process?

The build platform is lowered and a new layer of powder is spread Signup and view all the answers

What is the main advantage of using Electron Beam Melting (EBM) in the medical implant market?

Titanium alloys are widely used Signup and view all the answers

What is the minimum layer thickness in Electron Beam Melting (EBM)?

0.05mm Signup and view all the answers

What is the primary characteristic of Electron Beam Melting (EBM) that enables high material properties?

High vacuum melting Signup and view all the answers

What is the primary application of Electron Beam Melting (EBM)?

All of the above Signup and view all the answers

What is the main disadvantage of Electron Beam Melting (EBM)?

Vacuum requirement entails additional costs Signup and view all the answers

What type of materials can be used with Electron Beam Melting (EBM)?

Metals, ceramics, and composites Signup and view all the answers

What is the characteristic of Electron Beam Melting (EBM) that makes it suitable for precise parts?

Precise process control Signup and view all the answers

What is a characteristic of Glass-filled nylon SLS material?

It is resistant to high temperature and chemical environments Signup and view all the answers

What is the main advantage of SLS polyamide (nylon) material in prototype production?

It enables full functional prototype production Signup and view all the answers

What is the difference between SLA and SLS parts in terms of surface finish?

SLS parts have a lower surface finish than SLA parts Signup and view all the answers

What is the application of SLS 3D printed rubber-like parts?

For seals and sealing elements that are exposed to high temperature Signup and view all the answers

What is the process of Laminated Object Manufacturing?

A type of 3D printing process that uses layers of paper or sheet material Signup and view all the answers

What is the advantage of SLS material in terms of temperature resistance?

It has a high temperature resistance Signup and view all the answers

What is the difference between SLS and SLA parts in terms of feature details?

SLA parts have more precise feature details than SLS parts Signup and view all the answers

What is a characteristic of SLS polyamide (nylon) material?

Full functional production Signup and view all the answers

What is a limitation of Laminated Object Manufacturing process?

It produces rough surface finish Signup and view all the answers

How does the surface finish of SLA parts compare to SLS parts?

SLA has better surface finish Signup and view all the answers

What is a potential application of 3D printed rubber-like parts?

High-temperature applications Signup and view all the answers

What is a characteristic of Lompoxy material?

Resistance to chemicals Signup and view all the answers

What is a common use of Lompoxy material?

Biomedical applications Signup and view all the answers

What is a process used in Laminated Object Manufacturing?

Layer-by-layer bonding Signup and view all the answers

What is a key advantage of using SLS polyamide (nylon) material for production?

Full functional prototype production Signup and view all the answers

What is a characteristic of SLS polyamide (nylon) material?

Rubber-like properties Signup and view all the answers

What is the main difference between SLA and SLS in terms of surface finish?

SLA has a smoother surface finish Signup and view all the answers

What is the main advantage of Laminated Object Manufacturing (LOM) in terms of material costs?

Low material costs Signup and view all the answers

What is a limitation of Laminated Object Manufacturing (LOM) in terms of part complexity?

Difficulty in producing complex geometries Signup and view all the answers

What are rubber-like parts manufactured from, suitable for high-temperature applications?

SLS polyamide (nylon) material Signup and view all the answers

What is a characteristic of Lompoxy material?

High temperature resistance Signup and view all the answers

What is a use of Lompoxy material?

Seals and sealing elements Signup and view all the answers

What is a characteristic of SLS polyamide (nylon) material in terms of surface finish?

Rough surface finish Signup and view all the answers

What is an advantage of using SLS polyamide (nylon) material for production?

Full functional prototype production Signup and view all the answers

Study Notes

Additive Manufacturing (AM)

Refers to a class of technologies that can automatically construct physical models from Computer-Aided Design (CAD) data.
Also known as 3D printing.
Formed by adding materials layer by layer.

Why is AM relevant?

Sales: 3%
Metal tooling: 4%
Polymer pattern: 7%
Functional prototypes: 25%
Jigs and fixtures: 7%
Cosmetic models: 10%
End-use parts: 32%
Education and research: 12%

Applications of AM

Art
Dental applications
Automotive industry
Bioengineering
Aerospace applications
Fashion

Additive Manufacturing Process

1. Geometric Modeling
1. Tessellation of the geometric model
1. Slicing of the model into thin cross-sectional layers
1. Constructing the model
1. Finishing and cleaning

Geometric Modeling

Software used: Pro/Engineer, Fusion360, SolidWorks

Constructing of Layers

RP machines build one layer at a time

Fused Deposition Modeling (FDM)

Filament is melted in a nozzle that moves in the XY direction
Molten plastic is extruded from the nozzle and deposited on the build platform in layers
Requires support material

Stereolithography (SLA)

Laser traces the path of the geometry/pattern that is being produced
Resin hardens after laser exposure
Build platform descends, and the process repeats

Selective Laser Sintering (SLS)

Layer of powder is placed in the fabrication bed
High-power laser fuses the powder that it traced
Fabrication bed is then lowered, and a new layer of powder is spread

SLS Characteristics

Enables full functional prototype production
Surface finish is not good as SLA parts
Additional surface finish can be applied
Glass-filled nylon is resistant to high temperature and chemical environments
High shrinkage ratios can result in dimensional inaccuracy
Rubber-like parts can be manufactured directly from polymer

Laminated Object Manufacturing (LOM)

No specific details mentioned

Electron Beam Melting (EBM)

Process wherein parts are formed by melting metal powder layer per layer with an electron beam in a high vacuum
Suitable for medical implant market due to the use of titanium alloys
Characteristics:
- No need for extra heat treatment
- High surface quality
- Applicable to metals, ceramics, and composites
- Precise process
- Minimum layer thickness at 0.05mm
- Used in medical implants, aerospace, and automotive parts

Selective Laser Sintering (SLS)

Low cost due to readily available raw material
Relatively large parts can be made, as no chemical reaction is necessary
Production of complex parts is difficult
There may be a fire problem when the working zone gets too hot
No need for additional processing
No need for additional support
Very easy to use

Laminated Object Manufacturing (LOM)

The most common used material is still paper
Low cost due to readily available raw material
Relatively large parts can be made, as no chemical reaction is necessary
Production of complex parts is difficult
Fast as laser only traces the contour and does not trace the whole cross section
Parts can be used immediately after processing

Electron Beam Melting (EBM)

It is a process where parts are formed by melting metal powder layer per layer with an electron beam in a high vacuum
Titanium alloys are widely used in this technology, making it suitable for medical implant market
High quality vacuum melting enables high material properties
No need for extra heat treatment
Applicable to metals, ceramics, and composites
Precise process
Minimum layer thickness at 0.05mm

Stereolithography (SLA)

No information provided

Fused Deposition Modeling (FDM)

It is a solid-based rapid prototyping method that extrudes material, layer-by-layer, to build a model
Support material is required
Filament is melted in a nozzle that moves in XY direction
Molten plastic is then extruded from the nozzle and deposited on the build platform in layers
Used for producing functional prototypes, models, and end-use parts

Additive Manufacturing (AM)

Refers to a class of technologies that can automatically construct physical models from Computer-Aided Design (CAD) data
In this method, physical models are formed by adding materials layer by layer
The first techniques for rapid prototyping became available in the late 1980s
Synonymous to 3D printing
Applications include sales, metal tooling, polymer patterns, functional prototypes, jigs and fixtures, cosmetic models, end-use parts, education research, and others