Year 1 Flashcards
(54 cards)
definition of a prototype?
an artefact fit for the purpose of testing and evaluating
why do we prototype?
to evaluate a concept or design
what are 4 ways that prototypes are used?
- Generate ideas
- user testing
- communication
- design validation
what are 5 key characteristics for prototyping?
- Material substitution - with any materials you have to hand
- workmanship and audience
- form vs function
- iteration
- fidelity of prototypes
what is a low fidelity prototype?
a prototype that is sketchy and incomplete, that has some characteristics of a target product but is otherwise simple. usually used in order to quickly produce the prototype and test broad concepts
what is a high fidelity prototype?
an interactive prototype that stimulates the real systems or functionality and design details.
what are three types of manufacturing?
- formative manufacturing
- subtractive manufacturing
- additive manufacturing
what manufacturing process is very similar to 3D printing?
additive manufacturing
what are 5 process technologies? (3D printing)
- material extrusion
- vat polymerisation
- powder bed fusion
- material jetting
- binder jetting
what is material extrusion?
plastic filament is extruded through a nozzle. support material is required if a part overhangs
what is vat polymerisation?
usually liquid based. Parts need curing after printing. created layer by layer
what is powder based fusion?
either uses a laser or an electron beam to melt and fuse material powder together.
what is material jetting?
a printhead dispenses photosensitive material which solidifies under UV light. Built layer by layer. Very expensive manufacturing
what is binder jetting?
a liquid binding agent is deposited to join powder particles. layers then bond. can be brittle.
what are 4 things to remember when prototyping?
- be process specific
- be material specific
- machine dependant
- operator sensitive
what is part quality driven by in a prototype?
layer resolution
without adequate support, what could happen to parts? (4)
- lack dimensional stability
- required undesired post-processing
- look rubbish
- likely to fail and waste resources
what is infill structure and density?
usually a grid of squares or hexagons. Can be used to add structural rigidity to parts.
when a lower percentage of infill is used, what does this lead to?
- speeds up printing
- reduces the chances of warping
- saves resources
when a lower percentage of infill is used, what does this lead to? (3)
- speeds up printing
- reduces the chances of warping
- saves resources
what are three ways to reduce the mass/ volume of a product/ prototype?
- shell solid sections
- consolidate parts
- add ribbing to increase structural integrity
what is an engineering drawing?
a tool to communicate design and manufacturing intent
what are the three types of engineering drawing?
- detail
- assembly
- layout
what is a detailed engineering drawing?
used to capture the detail of a design in a form that allows parts (components) or a product to be fully described, geometrically or functionally