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fusion 360 - Coggle Diagram
fusion 360
dimensions
types
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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.
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how
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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.
Dimensioning Angles
It is marked with a curved dimension line, and has the degree ° symbol
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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Dimension lines, extension lines and object outlines should not cross or overlap
assemblies
what
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.
how
Constructing an assembly normally begins with bringing in a base component, selected because of its central role. Each component brought in needs to be oriented and located relative to other components in the assembly. Assembly joints are used between elements of components.
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tolerances
why
If tolerance is not given, exact measurement of the parts must be made. Rejection rate will be very high and is not realistic.
The range of tolerance will translate into the manufacturing method needed, since different manufacturing method has different degree of tolerance.
Same parts can be made from different companies and they have to be interchangeable. Tolerance ensures good quality control for parts from different companies.
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types
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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