non-proportional scaling a sketch entity

Sep 14, 2005 9 Replies

I want to scale a symetrical airfoil so that the length increases but the thickness stays the same, in Rhino this is real easy, in SW I've not a clue how to do it.



The scale dialog box does not seem to support this type of scaling function........or does it???



using SW2005 SP04



Thanks, Brad

formatting link



No it won't.

But you might want to try the Flex feature and use the stretch option. With it, you can limit the area of scale. If you're just scaling in one direction, you might be able to use stretch and not affect the endcap of the airfoil, but again I'm not sure what your shape looks like or whether this will work.

Regards

Mark

You could scale the resulting solid. Insert/Feature/Scale then deselect "Uniform scaling".

Jerry Steiger Tripod Data Systems "take the garbage out, dear"

thanks Jerry.........will give it a try. What I want to do is create the side-of-body fillet for a flying surface, usually this profile is a tweaked version of the root rib of the wing, but scaled so that the length is increased but the chord height is not.

Brad

formatting link

Unfortunately, it looks like SolidWorks doesn't make this very easy for you. I tried scaling a surface and that worked, so you could make a planar surface which is the shape of the root rib, pattern it, and then scale each of the surfaces appropriately. Then you have to make composite curves from the edges of each surface and loft using the composite curves as profiles. With luck you will be able to add the right tangency conditions at the ends and get a nice fillet.

Jerry Steiger Tripod Data Systems "take the garbage out, dear"

Hmmm............think I'll probably just tweak the profiles in RHino, them export them to SW. I did a lot of that in my early days before I got handier with SW.

Wonder why SW does not offer the non-proportional scale function??

Cheers, Brad

Hmm, it seems like you can do it?...

formatting link
..

Unfortunately, I'm still living in 2004, so I couldn't open it. Could you explain verbally how you did it? Is there new scaling functionality for sketches in 2005 or 2006?

Jerry Steiger Tripod Data Systems "take the garbage out, dear"

I added a 2004 version to that zip but it's just a solid scaled, then use the outline of the solid to copy the edge,.. and yes, no sketch scale is available in SW.

(btw, I would think that this is a very common enhancement request, to scale a sketch in the xyz?) (.. well, my past request.. that sketch features (not within a sketch but a resolved sketch) have copy, scale, mirror and pattern capibilities... maybe it will have to take Ade$k Inventor doing it so SW can follow??) ..

Hi Paul,

I need to transfer the file to my office PC, the one with SW on it to check out the file you sent. I keep a PC for E-mail and such and then there is the work PC that is not on-line. Thanks, Brad

Join the Discussion

Have something to add? Share your thoughts — no account required.

Didn't find your answer?

Ask the community — no account required