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autocad when making product, 9 type of dimensioning, reason - Coggle…
autocad when making product
dimension
dimension line
extension line offset
Dimension text
Extension line
Tolerance
Tolerance
it ensure that all the part in the interface fit well
range of tolerance will translate to different method and angle when manufacturing.
some part can be made from different company so that it can ensure good quality
without exact measurement, of the part, rejection rate will be high
type of tolerance
unilateral
only in one direction
to calculate tolerance
Tolerance=upper limit-lower limit
limit
upper and lower limit are specific
Bilateral
vary in two directions and both directions need not by the same dimension.
fit
Clearence Fit
allow two part to move e.g., door hinge.
Interference Fit
difficult to move or remove. where it need more force
assemble model work
type of joint
cylindrical
pin slot
slider
planar
Revolute
ball
Rigid
hand on joint and assemble drawing.
bodies in 3D
side
base
Plane
lid
Bill of material(BOM)
Material
part number
Quantity of part
9 type of dimensioning
dimensioning of multiple feature
dimensioning small feature
Dimensioning of radius
Superimpose running dimension.
Chain dimension
dimensioning of circle arc and hole
parallel dimension (datum dimension)
dimensioning angle
Combine Dimension
reason