topic Re: Elliptical ends in Inventor Forum

Elliptical ends

Anonymous — Wed, 22 Jun 2016 05:56:45 GMT

Hello.

How to draw elliptical ends?

Re: Elliptical ends

Marco.Takx — Wed, 22 Jun 2016 07:37:56 GMT

Witch version of Inventor do you use?

I only have Inventor 2017 installed so if you have a older release you can't open it. 😞

Re: Elliptical ends

Anonymous — Wed, 22 Jun 2016 08:57:07 GMT

Actual I have 2016.

Re: Elliptical ends

JDMather — Wed, 22 Jun 2016 11:53:24 GMT

Can you attach your *.ipt attempt here?

Re: Elliptical ends

Curtis_W — Wed, 22 Jun 2016 16:08:23 GMT

Hi a.prokop,

See the example at this link:

http://forums.autodesk.com/t5/inventor-general-discussion/is-it-possible-to-sweep-an-elipse-shape/m-p/3009336#M401260

I hope this helps.
Best of luck to you in all of your Inventor pursuits,
Curtis
http://inventortrenches.blogspot.com

Re: Elliptical ends

Anonymous — Wed, 22 Jun 2016 20:04:47 GMT

Curtis,

Wow, that is some impressive modeling right there. Why wasn't an ellipse drawn, lines the horizontal plane and the vertical axis drawn, the ellipse trimmed, and the sketch revolved? One sketch, one operation there.

Re: Elliptical ends

JDMather — Wed, 22 Jun 2016 20:11:48 GMT

@Anonymous wrote:

Curtis,

....and the sketch revolved? One sketch, one operation there.

Create a 2D drawing of your Revolve and compare the views to the image attached by the OP.

I think you will see the problem with Revolve.

Re: Elliptical ends

salariua — Wed, 22 Jun 2016 20:14:08 GMT

I think he’s into dished end for stainless steel vessels, torispherical, ellipsoid, etc.

Here are some examples:

www.voestalpine.com%2Fdivision_stahl%2Fcontent%2Fdownload%2F4249%2F34326%2Ffile%2FBrochure_Head%26Cones_E.pdf

http://pvtools.weebly.com/uploads/3/7/9/4/37946983/dish_head.pdf

attached is my 2015 attempt; I am not into surfaces so it needs checking by one of these mad geniuses that posted before me to check my model and correct my attempt.

Re: Elliptical ends

salariua — Wed, 22 Jun 2016 20:19:30 GMT

here is another example with calculation formulas:

http://pvtools.weebly.com/uploads/3/7/9/4/37946983/dish_head.pdf

Edit:

the ones I've done so far are circular so revolving the sketch is sufficient but he wants an ellipse at the vessel end. I wonder how would that be manufactured....

Re: Elliptical ends

Anonymous — Wed, 22 Jun 2016 21:49:25 GMT

https://youtu.be/ACo-WGuie7o
Here is the 2:1 semi ellipsoidal dished ends I use for our vessels. Easiest to set your parameters and make a quick form so the diameter drives the crown and knuckle radius

Re: Elliptical ends

Anonymous — Wed, 22 Jun 2016 22:03:24 GMT

mrdeanosid,

The trouble is, the footprint/plan/top view of what OP is trying to achieve is elliptical. Not just a straight-up elliptical head, as Curtis reminded me. Check out salariua's model. I thought that was a good way to go about it. I like to "paramater-ize" things, too. Might not be a bad idea for a double-elliptical head template.

Re: Elliptical ends

Anonymous — Thu, 23 Jun 2016 07:21:44 GMT

Solution Curtis Waguespack is ok.

But there are errors during the use of the shell.

Thank you for your help.