Additive manufacture Flashcards
Q: What is subtractive manufacturing?
A: A process that starts with a blank material and removes layers to form the final shape through milling, turning, shaping, or broaching.
Q: What is additive manufacturing?
A: A process where an object is built layer by layer to create its final shape, sometimes integrating a subtractive finishing step.
Q: What is stereolithography in 3D printing?
A: A 3D printing method using a UV-curable polymer in a gel bath, where selective exposure to UV light cures the polymer to create the object.
Q: What is 2-photon polymerization?
A: A subset of stereolithography that creates nano-scale structures by curing polymer only when two photons are absorbed, allowing the creation of structures smaller than light wavelengths.
Q: What is robocasting in additive manufacturing?
A: A method of printing a ‘green’ ceramic body from paste, which is then fired to finalize the shape.
Q: What is 4D printing?
A: 3D printing where the printed object can change shape in response to stimuli such as light, heat, or chemicals, or print objects with embedded sensors or shock absorption.
Q: What are the advantages of additive manufacturing?
A: Ability to create new specialized shapes, lighter materials, hybrid materials, custom designs directly from CAD files, rapid prototyping, on-site manufacturing, and greater customization.
Q: What are the disadvantages of additive manufacturing?
A: It is generally more expensive than mass manufacturing and slower for specialized items.
Q: What is fused deposition modeling (FDM)?
A: A popular and affordable 3D printing method where thermoplastic is melted and laid down in continuous filaments, with support material dissolving in water or chemicals.
Q: What is selective laser sintering (SLS)?
A: A method of 3D printing that uses a high-powered laser to fuse or sinter particles of polymer, metal, glass, or ceramic in a bed, requiring precise temperature control.
