Amounts
and type of data
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This picture
illustrates the situation when the product is “finished”. The product shall
be manufactured and some parts will be made in a NC system … The product will
be inspected with a measurement system … Etc. The CAD models are
the Reference Geometry that is used by many different systems in the
downstream process. Many partners
and/or subcontractors often manufacture the product. It is mainly the
geometry and structure of a product that is defined in the CAD systems. Other data
(tolerances, ..) is often manually added in the downstream systems. The geometry of a
product is fully defined as solids. Solids mean big amounts of data. The product is defined
as Parts, Subassemblies, and Assemblies. Downstream systems often get, and
sometimes also need subassembly data. The amount of data
is huge. The CAD models are big. The number of
downstream systems is often big. There is also data
going in the other direction, but the amount is normally small. The Reference
Geometry that is exported to the downstream systems must be right otherwise
there will be problems and costs. The Reference
Geometry is normally “right” in the CAD system where the product is defined
but there are problems to import the data into the downstream systems, and
there will be costs because of the import problems. The problem is the
conversion of the geometry data to the format of the downstream system. Will
be explained later … For most users the
import problem is a nuisance problem, and most users have met this problem.
But is it a small or a big problem?
What are the costs for these problems? The answer is that
the costs are frightening! Next picture
Optionally also
show picture illustrating the CAD data that is exchanged in the development
process, i.e. before it is “finished”.
Picture more |
(These
are the notes for the seminar leader)
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