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Dimensions, Tolerances and Assemblies - Coggle Diagram
Dimensions, Tolerances and Assemblies
Dimensions
In drawings
Dimension text
Units in mm
Not indicated in every text
Dimension line
Arrowhead on each end
Extension Line
Extension offset
Gap between object surface and extension line to avoid confusion
Continue or expand from the surface of the object
Establish size of dimension
Types
Parallel
Superimposed Running
Chain
Combined
Tolerances
Defines how much a line can deviate.
Takes into account how manefacturing limitations
Types
Bilateral
Unilateral
Limit
Calculation
Tolerance = Upper limit - Lower limit
Assembly Modelling
Joints
Rigid
No degrees of freedom
Revolute
Single rotational degree of freedom like a hinge
Slider
Cylinderical
Planar
Pin Slot
Ball
Bill of Material
Part number
Material
Quantity
Fits
Clearance
Interference