Computer-Aided Design Flashcards
KEY STEPS IN CAD MODELLING
Workplaces - represent the elevation, end elevation and plan. You can also create your own workplanes.
Sketches - 2D drawing which will be turned into a 3D feature. Sketch is called a profile.
Constraints - they are used to control profiles. They fix sections to other sections or components.
Features - Types of 3D work such as extrusion, revolve and shell.
Modelling tree - Tree shows workplanes and sketches.
Components - Each part of an assembly is a component.
Assembly - combination of all components.
KEY FEATURES
Extrusion - pulling a 2D sketch into a 3D shape. You can’t extrude if there is unconnected or overlapping lines. Add or subtract.
Revolve - helps to produce models which are cylindrical. Revolved don’t need to go round the full 360^. Revolve around an axis.
Shell - Remove the inside material of a model to leave only wall thickness. You can also remove or delete faces.
Fillet and chamfer - modify the edges of a 3D objects. Chamfer is always at 45^.
Array - Repeat profiles/features without redrawing them. Linear array, radial array and box array.
CONSTRAINTS
Align - Force an object to be in line with another object.
Offset - Allows you to set a specific distance in between the two objects.
Orientation - Set a component at an angle to another component.
Mate - Joins two faces of two objects together and unable to separate.
Tangent - Will lock the round face of a cylinder to another object.
Centre axis - For a cylindrical shape to be centred with another cylindrical shape.
SIMULATION
Training - Flight simulators? surgery equipment and race car simulators. Used to reduce the cost of training staff.
Testing - Products can be tested on a computer prior to manufacture which can reduce production cost incase there is a fault.
Predicting - Commonly used in weather forecasting.
ILLUSTRATION
Films and animation - CGI means a 3D model only needs to be drawn once and then can be moved freely.
Product visualisation - Rendering a model to look realistic. Product designers use this to share ideas about their product prior to manufacture or in advertisement.
Video - Graphics in video games allow them to change shape, texture, colour or light depending on how the payer interacts.
ADVANTAGES AND DISADVANTAGES OF 3D CAD
Time saving, accurate, large selection of features.
