Machining a forging

Hello all,

I have 2 parts that are mchined from a common forging. I modeled the
forging without any internal holes and I made the part about .06
longer for machining.

How do I start modeling the machined drawing from the raw forging?

This way whenf the forging is revised, the changes are reflected in
the machined drawings.

Thank you for ALL you help.

 

Two models.

One for forging and one for the machined part.

On the drawing:

Label the forging "FROM" with reference dimensions.

Label the machined (finished) part "TO" with finished dimensions and
tolerances.

Paul

 

There are two options for you.

1) The traditional method is to make an assembly, assemble the forging
(or casting) into it with a Default constraint, and then start applying
assembly-level cuts to remove the material. This is your as-machined
part.

2) If you have the APX module, create a new part and add to it an
Inheritance feature of the forging and proceed with cuts to create the
finished part.

You can also do a Merge, but I haven't done that since Inheritance
became available.

Regards

 

Only .06 longer? .125 to .25 is more typical (gets you under the scale and
case hardened material where machining is necessary) YOu must be counting on
die growth to compensate for mismatch (or these are very small parts!!)

This has been discussed, extensively, intensely a couple of times on this
NG. It might be worthwhile checking this NG on Google Groups and searching
on casting/forging/molding. Same Pro/e techniques apply to all three. As I
recall, Brown gave a pretty detailed descripition of Inheritance Feature
creation in an earlier discussion. (Hope I didn't attribute incorrectly)

This can be done but don't recall if it favors starting with finished part
and adding material for rough cast or starting with rough and removing to
show finished state. Anyone thought about the configuration management
issues inherent in this process of morphing rough to finished product? in
two flavors? or is this only a process consideration? New part nos. from
rough to finish, process steps indicated with dash nos.? Thoughts and
experience?

David Janes