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Dimensions, Tolerances and Assemblies - Coggle Diagram
Dimensions, Tolerances and Assemblies
Dimensions in drawing
Types
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Dimensioning of Circle, Arc, and Hole
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Rules
Dimensions should not be duplicated, i.e. same dimension should not be repeated on different views, or the same information need not be given in two different ways
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Generally, dimensions and drawings must be neat.
Dimension lines, extension lines and object outlines should not cross or overlap
Tolerances
Importance
In practice, parts cannot be manufactured exactly to the dimensions stated in the drawing, due to manufacturing variations. Tolerances are included with dimensions in engineering drawings to take into account these manufacturing limitations.
Types
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Bilateral Tolerance
allowed to vary in two directions from the specified dimension. Both directions need not vary by the same amount.
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Assembly Modelling
Meanning
In an assembly model, multiple parts are brought together to define a larger, more complex product representation. Assembly modelling facilitates the collaboration among designers, engineers, manufacturing technicians and others to ensure a product assembly works. Individuals in different disciplines can work concurrently, resulting in faster and less costly delivery of products to market.
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Revolute Joint
Has a single rotational degree of freedom, much like a hinge.