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Dimensions, Tolerance and Assemblies - Coggle Diagram
Dimensions, Tolerance and Assemblies
Dimensions
Types of Dimensioning:
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Chain Dimensioning
Should only be used if the function of the object would not be affected by the accumulation of the tolerances
Dimensioning of Circle, Arc and Hole
- An arc is dimensioned by its radius
- Holes are located by their centerlines
- A circle is dimensioned by its diameter
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Rules of Dimensioning
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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Dimension lines, extension lines and object outlines should not cross or overlap
Tolerances
Types of Tolerances:
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
Types of joints:
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Revolute Joint: Has a single rotational degree of freedom, much like a hinge.
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