Converting a Sectioned face onto a sketch

tim_wheeler

Is there a way to project  the perimeter of a sectioned view onto a sketch on the same plane as the section view?

I have imported step file and would like to duplicate the cross-section onto a sketch to modify and refine..


Obviously I could live with lines that wouldn't translate, although the should all have the potential to convert to sketch entities in this case.

Any suggestions?

alnis

To create sketch entities for the intersection between an entity and your sketch, you'll want to use the Intersection tool in the sketch:
https://cad.onshape.com/help/Content/sketch-tools-intersection.htm

However, in your case, if you're modifying the existing geometry, you may want to consider using Onshape's direct editing tools to make the changes rather than duplicating the entire cross-section.
https://learn.onshape.com/courses/direct-editing

tim_wheeler

Thanks.. 

tim_wheeler

OK.  Follow up question.  Can I make a selection and delete all constraints easily... similar to the side bar method in Solidworks.  I know I can click on each entity and remove them one-by-one, but is there a way to select multiple entities and delete all constraints, or all external constraints.. etc.?

bruce_williams

@tim_wheeler
there is an improvement request for handling constraints here

And someone posted a tip that helps - view the sketch from the edge and all the constraints will be above or below the plane.  Makes selecting them easier.

tim_wheeler

I found a work around, although a bit obtuse.   A cut paste will delete and paste back with no constraints.  Paste location seems to be unpredictable, however.

romeograham

This Project Body FeatureScript is one of my favourites for this type of work: https://cad.onshape.com/documents/201b33ee5450cefbca3b34b8/v/9028ee782ed5ec471178bca1/e/03f0c71d4856a8408c7766a0

If your section isn't coincident with the largest area of your part you can get creative with splitting the body in the location you want, projecting the split face with this FS, and then Boolean the bodies back together.