【转帖】using 3d model geometry

yang686526

using 3d model geometry
is anyone using 3d model geometry in lieu of drawings and does it work better than drawings? i believe the standard is asme y14.41-2003.
robert
large parts of the automotive and aircraft industry work virtually solely with 3d models and have done for many years.
the reasons are very obvious; it is virtually impossible to define complex 3d shapes as 2d drawings. other industries seem slower to catch on or maybe with less complex components there is no need. you do not get close to being a tier 1 supplier in automotive without the ability to work and measure to solid models, at least in biw.
as with any 鈥渘ew鈥?technology you either buy into it or fight it, as there are problems to solve. in a few years time imo 2d drawings in many industries will be as rare as a draughtsman drawing on a piece of paper and running off prints.
yes, and yes.  at least from a documentation perspective.
quote (ewh):
at least from a documentation perspective.
does this imply that that some sort of cmm is used during inspection since not all the data is on the drawing?  this has been the 2nd greatest argument for following this new standard where i work.
"art without engineering is dreaming; engineering without art is calculating."
yes, parts are inspected from the model.  using the same cad software, the machinist and the inspector can view any tolerances or specifications that are present in the model file.
we have a machine shop that uses minimally dimensioned drawings and our solid models.  so we have all our standard design notes on the drawing and the rest of the design is captured in the model.  they use the model to inspect the parts.
heckler
sr. mechanical engineer
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