How to Model a Bowl Using Inventor Sweep

[이슬이]

Hello.

I have a question regarding modeling.

I want to model a shape that looks like the image below using a sweep.

However, the sweep is not performed normally due to the curvature rate, and even if it is a sweep, it appears different from the sketched shape.

I want to use this sketch to model a bowl-like shape.

When I try to use the loft it just keeps giving me an error.

In addition, the curvature when viewed from the top and bottom views is unknown.

Is there no way?

[wgraham]

Are you expecting perfect symmetry?  You're model is egg shaped which explains the difference in profile right to left.  See screen capture below

[A.Acheson]

Maybe not the answer to the sweep question but  wouldn’t revolve be the best command if the bowl is symmetrical?   

[johnsonshiue]

Hi! This seemingly simple egg shape can be tricky to model actually. Like William mentioned here, the profiles aren't symmetric. As a result, they won't match on the other side.

There are other ways to model this shape. I used a combination of Sweep and Boundary Patch. Please take a look.

Many thanks!

[이슬이]

Hello.

Thanks for your help!

Let's actively use the patch too!

However, when modeling with a sweep, a misalignment occurs as shown in the image below...

Is there any other way?

[johnsonshiue]

Hi! I don't believe it is the Sweep's problem. The profile is indeed not perfectly symmetric. To prove it, simply draw a line connecting the two circles. The draw a vertical line passing the mid point of the horizontal line. Next, mirror the elliptical arc on the right to the left. You will see the gap.

Many thanks!

[cadman777]

I can't look at your model to get the dimensions, b/c my Inventor is older.

But I made something similar from the dimensions shown in this thread.

This should give you an idea of one way you can do this.

It's not perfect, but it's close.

It all has do to with the control curves.

I started from the basic shape, then made sure the Lofts would work, then added control curves to smooth out the shape, and then tweaked it a bit with end controls on the 2nd tab.

Took about an hour to make.