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Extruded Thin Ribs

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Extruded 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?

--
Doug Schaefer | Experienced Mechanical Design Engineer
LinkedIn
1 ACCEPTED SOLUTION

Accepted Solutions

Re: Extruded Thin Ribs

Do you need to create the new feature - Trajectory Ribs

You can find other video tutorials here: http://learningexchange.ptc.com/tutorials/by_product/product_id:1

Regards,

Vladimir

Best Regards,
Vladimir Palffy

View solution in original post

9 REPLIES 9

Re: Extruded Thin Ribs

I remember that at a SW users group meeting recently, but not on Pro/Creo.

Re: Extruded Thin Ribs

Do you need to create the new feature - Trajectory Ribs

You can find other video tutorials here: http://learningexchange.ptc.com/tutorials/by_product/product_id:1

Regards,

Vladimir

Best Regards,
Vladimir Palffy

View solution in original post

Re: Extruded Thin Ribs

That's it, but it seems limited in that ribs cannot terminate at an open edge of the part.  In my case there is no side wall and the feature fails.

 

 

Capture.JPG

--
Doug Schaefer | Experienced Mechanical Design Engineer
LinkedIn

Re: Extruded Thin Ribs

Thanks for sharing.

Re: Extruded Thin Ribs

Hi Doug,

... yes it is true - do you need to create side walls for Trajectory Rib feature.

For your example, you can create closted shell and then you can use Solidify feature (create cut by plane/surface)

Regards,

Vladimir

Best Regards,
Vladimir Palffy

Re: Extruded Thin Ribs

You could use a normal profile rib for the open ended section and then use trajectory rib for the rest. Trajectory rib has some very, very nice features. It may be asking a bit much for the feature to know where you want it to end automatically but it's fantastic for most internal rib applications.

Re: Extruded Thin Ribs

there is an option in draft tool.."extend intesect surfaces"....may be this option can be put in the trajectory rib tool as an enhancement request!

Re: Extruded Thin Ribs

Vote for new IDEA - Trajectory Rib feature for open geometry

Regards,

Vladimir

Best Regards,
Vladimir Palffy

Re: Extruded 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 above wouldn’t work.

--
Doug Schaefer | Experienced Mechanical Design Engineer
LinkedIn
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