da Angel Tee mancano 3 anni
235
Lesson 6
da Angel Tee mancano 3 anni
235
Ball
Planar
Pin Slot
Cylindrical
Slider
Revolute
Single rotational degree of freedom like a hinge
Rigid
Joins 2 components together no movements
There will always not be enough clearance for the shaft to fit
Difficult to move or remove
Shat is bigger than the hole
There will always be enough clearance for the shaft to fit
Allows 2 parts to move
Shaft is smaller than the hole
e.g. door hinge
The upper and lower limits of the dimension
Vary in only 1 direction
Vary in 2 directionn many not be the same amount of tolerance
ensure quality control for parts form different companies
Define how much deviation from the dimension is allowed
Base dimension (mm)
At the bottom corner of the drawing
Has an arrowhead on each end
Extended line form the surface of the object to establish the size of the dimensions
The gap between object and extension line
Marked with curved dimension line and has a degree symbol
Hole
located by their centerlines
Arc
Circle
Diameter
Starts with R
Just dimension is center is not needed
Line to indicate centre start form centre
Use N x Dimension for multiple same dimensions
Arrowheads place outside the extension lines
Uses both Chain and parallel dimensioning
Should only be used if the function of the object will not be affected by accumulated tolerances
Indicates the dimensions individually
Simplifies dimensions to reduce the space used on a drawing
consist of several dimension origination from a common reference aka datum
