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Dimension, Tolerance, Assembly - Coggle Diagram
Dimension, Tolerance, Assembly
Tolerance
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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.
Dimensions
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Dimensioning of Radius
Radius dimensioning start with capital 'R'. Showing a radius dimensioned with the center of the radius located on the drawing and shows how to dimension radii which do not need their centers locating.
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Dimensioning of Circle ,Arc, and Hole
A circle is dimensioned by its diameter. An arc is dimensioned by its radius. Holes are located by their centerlines.
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Dimensioning Angles
It is marked with a curved dimension line, and has the degree
symbol.
Chain Dimensioning
Should only be used if the function of the object would not be affected by the accumulation of the tolerances.
Assembly
Assembly Modelling
Types of Joints
Rigid
Fixes two components to one another, it provides no degree of freedom
Revolute
Has a single rotational degree of freedom, much like a hinge.
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Rules of Dimensions.
Dimension lines, extension lines and object outlines should not cross or overlap: dimensions should be placed outside the part.
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Dimensions should not be duplicated, that is 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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