Additive Manufacturing Technologies
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Questions and Answers

What does AM stand for?

Additive Manufacturing

What is the main advantage of using AM?

It creates anything you want

What does the acronym STL stand for?

Stereolithography

What are two of the most important requirements for AM?

<p>Design &amp; Creativity</p> Signup and view all the answers

What are the two most important aspects of AM?

<p>Design and engineering</p> Signup and view all the answers

AM is a subtractive manufacturing process, meaning material is removed to create the final object.

<p>False (B)</p> Signup and view all the answers

Which of these is NOT a synonymous term for AM?

<p>Subtractive manufacturing (D)</p> Signup and view all the answers

AM has been around for a long time, but it's only recently become more popular.

<p>True (A)</p> Signup and view all the answers

What is the main benefit of using AM?

<p>reduced waste</p> Signup and view all the answers

What is the most important factor for selecting materials for AM?

<p>The appropriate material</p> Signup and view all the answers

What is the most important aspect of AM when it comes to sustainability?

<p>The reduction of waste</p> Signup and view all the answers

The use of digital data is essential for AM processes.

<p>True (A)</p> Signup and view all the answers

What is the name of the widely accepted file format for 3D models in AM?

<p>STL file format</p> Signup and view all the answers

AM is only used to create prototypes.

<p>False (B)</p> Signup and view all the answers

What are two of the key benefits of AM?

<p>Reduced waste &amp; design complexity</p> Signup and view all the answers

What is the main difference between Additive Manufacturing and traditional subtractive manufacturing?

<p>Additive manufacturing adds material while subtractive manufacturing removes material</p> Signup and view all the answers

High temperatures are always required for AM processes.

<p>False (B)</p> Signup and view all the answers

AM is always more expensive than traditional manufacturing methods.

<p>False (B)</p> Signup and view all the answers

What is the term used for a 3D pixel?

<p>Voxel</p> Signup and view all the answers

AM technology requires the use of molds.

<p>False (B)</p> Signup and view all the answers

AM processes can be very fast when it comes to creating parts.

<p>True (A)</p> Signup and view all the answers

What is the term used to describe the process of reducing the material to the desired shape without changing its composition?

<p>Subtractive manufacturing</p> Signup and view all the answers

AM is becoming more popular due to its potential for creating complex geometries and functionality.

<p>True (A)</p> Signup and view all the answers

What is the key benefit that Fused Deposition Modeling (FDM) offers?

<p>It is cost effective</p> Signup and view all the answers

What are the two most common types of extrusion-based AM technologies?

<p>FDM &amp; FFF (A)</p> Signup and view all the answers

FDM technology requires a lot of post-processing to achieve the desired properties.

<p>True (A)</p> Signup and view all the answers

FDM is well-suited for producing parts with high strength and durability.

<p>True (A)</p> Signup and view all the answers

FDM is a good choice for mass production.

<p>False (B)</p> Signup and view all the answers

What are two common defects that can occur in FDM parts?

<p>Shape distortion and micro voids</p> Signup and view all the answers

The use of a binder is essential for binder jetting processes.

<p>True (A)</p> Signup and view all the answers

Binder jetting is limited to prototyping.

<p>False (B)</p> Signup and view all the answers

Binder jetting is a relatively inexpensive AM process.

<p>True (A)</p> Signup and view all the answers

Binder jetting requires high temperatures to bond powder particles together.

<p>False (B)</p> Signup and view all the answers

Binder jetting processes can be used to produce parts with a wide range of materials.

<p>True (A)</p> Signup and view all the answers

Binder jetting is a highly efficient process.

<p>True (A)</p> Signup and view all the answers

Binder jetting is a complex process.

<p>False (B)</p> Signup and view all the answers

Binder jetting is a good choice for producing large-scale parts.

<p>False (B)</p> Signup and view all the answers

Binder jetting is a relatively new AM process.

<p>False (B)</p> Signup and view all the answers

Binder jetting is a good choice for producing parts with high accuracy.

<p>False (B)</p> Signup and view all the answers

Binder jetting is a good choice for producing parts with a smooth surface finish.

<p>False (B)</p> Signup and view all the answers

Binder jetting is a good choice for producing parts with a wide range of colors.

<p>True (A)</p> Signup and view all the answers

Binder jetting is a good choice for producing parts with high strength.

<p>True (A)</p> Signup and view all the answers

Binder jetting is a good choice for producing parts with high detail.

<p>False (B)</p> Signup and view all the answers

Binder jetting is a good choice for producing parts with high dimensional accuracy.

<p>False (B)</p> Signup and view all the answers

Binder jetting is considered a relatively new technology.

<p>False (B)</p> Signup and view all the answers

Binder jetting is a good choice for producing parts with excellent surface finish.

<p>False (B)</p> Signup and view all the answers

Binder jetting is a good choice for producing parts with high detail and intricate geometries.

<p>False (B)</p> Signup and view all the answers

Flashcards

Additive Manufacturing (AM)

A process that builds objects layer by layer by adding material, typically from a 3D model, as opposed to subtractive manufacturing, which removes material.

Design for AM

Designing specifically for AM processes, taking advantage of its capabilities like complexity and tailored geometries, to create objects that might not be possible with traditional methods.

Rapid Prototyping

Quickly creating physical models or prototypes of designs, often using AM, for testing and evaluation.

Freeform Fabrication

A defining characteristic of AM, where the ability to create complex shapes without molds or restrictions is a key advantage.

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Circular Economy

A model where resources are used and reused in a closed loop, minimizing waste and maximizing resource efficiency.

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Post-Processing

Additional operations performed after the AM process to enhance final part geometry, surface finish, or properties.

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Digital Twin

A virtual representation of a physical object, allowing simulation, analysis, and interaction in a digital space.

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CAD (Computer-Aided Design)

Software used to create 2D and 3D models digitally for engineering, design, and manufacturing purposes.

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STL File

A common 3D file format used in AM, representing the surface geometry of a 3D model for machine interpretation.

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Voxel

The 3D equivalent of a pixel, representing a small unit of volume in a 3D space.

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Stereolithography (SLA)

An AM process using a UV laser to solidify liquid photopolymer resins in a vat, layer by layer.

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Photopolymer

A liquid resin that becomes solid upon exposure to UV light or visible light.

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DLP (Digital Light Processing)

An AM process that uses a projector to project a pattern of light onto a vat of photopolymer resin, solidifying an entire layer at once.

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Powder Bed Fusion (PBF)

An AM process where a laser or electron beam melts or sinters layers of powder particles, building up a solid object.

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SLS (Selective Laser Sintering)

A PBF process using a laser to partially melt powder particles, binding them together without fully melting.

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SLM (Selective Laser Melting)

A PBF process using a laser to fully melt powder particles, creating a solid object with high density.

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EBM (Electron Beam Melting)

A PBF process using an electron beam to melt powder particles, often used for metals due to its high energy density.

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Sintering

A process of joining powder particles together without fully melting them, using heat and pressure.

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Binder Jetting

A PBF process where a binder is selectively jetted onto a powder bed, bonding particles together layer by layer.

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FDM (Fused Deposition Modeling) / FFF (Fused Filament Fabrication)

An AM process where a thermoplastic filament is heated and extruded through a nozzle, creating a solid object layer by layer.

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LOM (Laminated Object Manufacturing)

An AM process where thin sheets of material are cut and layered to create a solid object.

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Volumetric Energy Density

The amount of energy delivered by the laser or electron beam per unit volume of the powder bed.

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Linear Energy Density

The amount of energy delivered by the laser or electron beam per unit length of the scan path.

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Melt Pool

The region of molten material created by the laser or electron beam during powder bed fusion.

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Balling

A defect in powder bed fusion, where the molten material shrinks into spherical droplets due to surface tension.

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Sputtering

A defect in powder bed fusion, caused by overheating the melt pool, where molten droplets or powder particles are ejected from the surface.

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Functional Graded Material

A material whose properties vary gradually across its thickness, often created using AM for specific applications like thermal barriers.

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LCA (Life Cycle Assessment)

A method for assessing the environmental impacts of a product throughout its lifecycle, from extraction of raw materials to disposal.

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Disruptive Technology

A technology that significantly disrupts existing markets and industries, often creating new opportunities.

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Mass Customization

The ability to produce highly personalized products with a wide range of options, often enabled by AM.

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On-Demand Manufacturing

Producing products only when they are needed, minimizing inventory and waste, often enabled by AM.

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Decentralized Manufacturing

Shifting manufacturing processes closer to customers or points of use, reducing transportation and supply chain costs.

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Intellectual Property Issues

Challenges related to protecting inventions, designs, and patents in the context of AM, as it can be relatively easy to copy designs.

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Material Properties

The physical and chemical characteristics of a material, such as strength, durability, thermal resistance, etc.

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Study Notes

Additive Manufacturing Technologies

  • Additive manufacturing (AM) processes create objects layer by layer, unlike traditional subtractive manufacturing methods that remove material
  • AM technologies are diverse, using various materials, energy sources and processes
  • Different classifications exist based on raw material type, process type or basic technology
  • Key aspects include materials used in the process, whether liquid, powder or solid sheet, and the process itself

Classes of AM Technologies

  • Vat photopolymerization (SLA, DLP, CLIP) uses a liquid photocurable resin, cured by UV light.
  • Sheet lamination uses sheets of material, cut and bonded to create the object.
  • Powder bed fusion (SLS, SLM, DMLS, EBM) uses a powder bed fused together by laser or electron beam.
  • Material extrusion (FDM, FFF, Robocasting, Bioprinting, Contour crafting) extrudes a molten or semi-molten material into layers.
  • Binder jetting (3DP, MJP) selectively deposits a liquid binder to bond powder materials.
  • Direct energy deposition (LENS, EBAM, LMD) uses a focused thermal energy source to melt and deposit material.
  • Material jetting (PolyJet) uses droplets of material selectively deposited.

Key Considerations

  • Material properties and characteristics are crucial for AM
  • AM is becoming more common and is a rapidly evolving technology
  • Speed, cost, and scalability vary between AM processes.
  • AM design often emphasizes functional and geometric complexity
  • Waste reduction is commonly considered in AM design
  • Post-processing steps are often necessary for enhanced part quality, properties, and aesthetics.

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Related Documents

Additive Manufacturing Technologies PDF

Description

Explore the various additive manufacturing (AM) technologies that create objects layer by layer, providing a contrast to traditional subtractive methods. This quiz covers key aspects of AM processes, including different classifications based on materials and methods used, such as vat photopolymerization, sheet lamination, and powder bed fusion. Test your knowledge on these innovative technologies!

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