Extend on radius

Hello All,

I am just curious your opinion about this feature issue. If you have a flat
surface with a round (arc) piece and you extend the surface at this edge, the
result won’t be round (arc) anymore. I used Wildfire 2.0 M090. In my opinion
this should not work like this. I tried to ask PTC, but they answered first:
this is fixed in the next built - I use M190 now, but still not works good.
Second time they answered this is because of the algorithm calculates the
result point by point. Could anybody try this in Wildfire 3.0 please? Just for
my curiosity. Thanks,

Peter Bo

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You made me curious too !


Guess it's one more item where ProE doesn't live up to its reputation where others silently do...


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This works fine on WF3. I actually tried it on WF2, M160 and it works also.


How did you build the "round" in the corner. I tried it by creating a solid block, then adding a round to the solid then adding the offset as an additional feature and that worked.


Then I created a round/fillet inside the sketch and it worked also.


Just for fun I created the same profile as a sketch and not as a solid feature then created an offset from the sketch and still obtained an offset curve set with a round defined by a radius...


I don't use surfaces much but I then made a fill-surface (a planar surface with defined boundaries). Then made an offset using an offset from the rounded corner and everything was still defined with clear parameters (rounds/radii not splines). This was done in WF2 M160.





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If you create an initial feature with non-conic (non circular) curves they are then defined as splines. Splines must be created as offset points with normal vectors. This can also happen if you import the curve data and the arc is translated into a spline rather than an arc.

Edited by: jraquet

Ok,

Thank you
for your answers,

Sorry for
my bad English; might be I wasn’t too precise as I said “round”. I meant it as
an arc. I often work with surfaces for sheet metal parts, and I realized that
the extended arc becomes a Spline. So I can not dimension it on a drawing and
it could lead to undesirable interferences in assemblies too.

If you say that works on WF3, please apply an
analysis (Geometry/ Curvature) on the extended edge, and let us see the result,
or just put that model in a drawing and try to dimension the extended edge. You
can call that piece arc, if its curvature is constant.



Peter

I did find the "extend edge" button so I now better understand your problem. I was able to attach an arc/curve to the extended edge it could be dimension but this seems like extra and unecessary work. The same problem occured with WF3 so it doesn't look like your problem is addressed in the new version.


I think one problem may be that the measure left for the extension is the actual extended dimension and not a radius. The way I did it by created an additional feature rather than using an extension...


Thank you for your insight.


Are you using sheetmetal to create sheetmetal parts?

Ok,

Yes, I often use surfaces for sheet metal, the reason is: easier
to make an assembly from complicated parts. See top-down design method. For the
top level I make a surface from the part; and split it to more parts (for this I
use Extern Copy Geom) for the bottom level; and the top level assembly is built
by default component positions (no mate, no align…); this assembly is principally
the same surface with wall thickness divided to “unfoldable” parts. It is not
always efficient to use, it is depending on the task.
Peter