surface profiles and datumn
surface profiles and datumn
(OP)
Suppose you have a cone and a surface profile on the side surface relative to datum A (diameter of the base) and datum B (plane of the base). Why do we need these datum? What do they mean?
Thanks,
Ali
Thanks,
Ali





RE: surface profiles and datumn
RE: surface profiles and datumn
Thanks.
RE: surface profiles and datumn
But thinking on it more, if the side angle and height dimensions are basic, there should be no need to refer back to the base circle, as it will be a result of the other dimensions.
What dimensions are defining the cone? Are they basic?
RE: surface profiles and datumn
But in your case profile of a conical shape - the spec guides us by saying dimension the base diameter, make the angle basic and apply a profile to the concial surface
RE: surface profiles and datumn
RE: surface profiles and datumn
If the base diameter is basic, I see no good reason to label it as a datum.
If you have dimensions for the angle, height and base diameter, the part is over-dimensioned.
RE: surface profiles and datumn
You need to datums to orientate the part.
RE: surface profiles and datumn
RE: surface profiles and datumn
Chris
Sr. Mechanical Designer, CAD
SolidWorks 05 SP2.0 / PDMWorks 05
ctopher's home site
RE: surface profiles and datumn
I think you hav a number for me and if you want could discuss further.