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Sketched Thin Ribs

Topaz II

Sketched Thin Ribs

Creo 2, M040

I swear I remember seeing that there was an enhancement in WF5 or maybe Creo 1 to allow you to sketch a series of lines, multiple open sections, and extrude that as a thin feature.  They showed it creating a network of ribs in a plastic part.

I'm trying to do this in an internal sketch (a simple T) in an extruded thin and Creo 2 is giving me the same old ' multiple loops must be closed' error.  I tried again with an external sketch and got 'Intersecting entities encountered in the section' and Creo refused to use the sketch.

Am I dreaming about these extruded ribs?  If not, how do I do this?

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Doug Schaefer | Experienced Mechanical Design Engineer
LinkedIn
3 REPLIES 3

Sketched Thin Ribs

Hi Doug
You must use the Trajectory Rib feature for this. A normal thin extrude will not works.
/Bjarne

Sketched Thin Ribs

That's it, but it doesn't work if the side of your part is open, which mine is.  Oh well.

[cid:image003.jpg@01CE471E.0A346540]

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Doug Schaefer | Experienced Mechanical Design Engineer
LinkedIn

Sketched Thin Ribs

After playing with this tool I find it quite useful, but rather specific in application.

The open end points of your sketch have no bearing on the end of your ribs.  Proe / Creo is going to extend or trim them at the side wall of the part.  So, a 1" long line inside a 10" wide part produces a rib across the full 10".  Conversely, a 10" long line over a 1" long part produces a rib only inside the 1".

That explains why my sketch below wouldn't work.

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Doug Schaefer | Experienced Mechanical Design Engineer
LinkedIn
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