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Dimensions, Tolerances and Assemblies - Coggle Diagram
Dimensions, Tolerances and Assemblies
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Tolerance
Why are they important?
- Rejection rate will be low and realistic when estimated measurement of parts is made due to manufacturing variations
- The range of tolerance will translate into manufacturing methods needed due to different manufacturing methods with different degrees of tolerance
- Some parts can be made from different companies and they need to be interchangeable. Tolerance ensures good quality control of parts from different companies
- Tolerance ensures that mating parts of an assembly interface and fit well.
Types of Tolerance:
- Bilateral Tolerance
- Unilateral Tolerance
- Limit Tolerance
Bilateral Tolerance
Allowed to vary in two different directions from a specified dimension. Both dimensions need not vary from the same amount.
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Assemblies
What is an Assembly Modelling?
It is when multiple parts are brought together to define a large and complex product representation.
Two types of fits:
- Clearance fit
- Interference fit
Interference fit
Happens when it is difficult to fit the two interfacing parts. When one is in this kind of situation, a lot of force is needed to remove the two parts.
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How does it work?
It begins by bringing in the base component because of its central role. Other components that are brought in needs to be oriented and located to other components in the assembly. Assembly joints are used between elements of components.
