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Dimensions, Tolerances, and Assemblies - Coggle Diagram
Dimensions, Tolerances, and Assemblies
DIMENSIONS
9 types of dimensioning
- Parallel Dimensioning
- Superimposed Running Dimensioning
- Chain Dimensioning
- Combined Dimensioning
- Dimensioning Small Features
- Dimensioning of Multiple Features
- Dimensioning of Radius
- Dimensioning of Circles, Arc, and Holes
9.Dimensioning Angles
Rules
Dimensions should not be duplicated,
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Dimension lines, extension lines and object outlines should not cross or overlap
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ASSEMBLY MODELLING
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.
TOLERANCES
Importance of tolerances
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.
3 Types of Tolerances
- Bilateral Tolerance: allowed to vary in two directions from the specified dimension. Both directions need not vary by the same amount.
- Unilateral Tolerance: allowed to vary in only one direction
- Limit Tolerance: the upper and lower limits of the dimension are specified
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