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FUSION 3 - Coggle Diagram
FUSION 3
Dimensions
Superimposed Running- Simplifies parallel dimensions in order to reduce the space used on a drawing.
Parallel Dimensioning (Datum Dimensioning) - Consists of several dimensions originating from a common reference surface.
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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Dimensioning Small Features- Placing arrow heads outside the extension lines so that it would be easier to read.
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Dimensioning of Radius- Radial dimensions start with the capital 'R'
a) Shows radius dimensioned with the center of the radius located on the drawing
b) Shows how to dimension radii which do not need their centers locating.
Dimensioning of Circle, Arc, and Hole
- Circle is dimensioned by its diameter.
- Arc is dimensioned by its radius
- Holes are located by their center lines.
Dimensioning Angles- It is marked with a curves dimension line, and has the degree symbol
JOINTS
RIGID- Fixes two components to one another, it provides no degrees of freedom.
REVOLUTE- Has a single rotational degree of freedom, much like a hinge.
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Rules of Dimensions
- Dimensions should not be duplicated
- Avoid dimensioning to hidden lines and features
- Dimension lines, extension lines and object outlines should not cross or overlap.
Tolerance
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Bilateral- 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
WHAT?
Multiple parts are brought together to define a larger, more complex product representation. It facilitates the collaboration among designers, engineers, manufacturing technicians and others to ensure a product assembly works. Individuals can work concurrently, resulting in faster and less costly delivery.
HOW?
It normally begins with 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.
Calculating Tolerance- Tolerance is defined as the difference between the upper limit and the lower limit of a dimension
Tolerance=Upper Limit - Lower Limit