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jmcternan
Posts: 47
Registered: ‎09-29-2011
Message 1 of 11 (598 Views)
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Problem sweeping an arch around a rectangle

598 Views, 10 Replies
05-04-2012 06:23 AM

I am attempted to sweep an arc around a rectangle, but the program will only let me sweep on three of the four edges.  Model and pic attached.

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JDMather
Posts: 26,186
Registered: ‎04-20-2006
Message 2 of 11 (593 Views)

Re: Problem sweeping an arch around a rectangle

05-04-2012 06:49 AM in reply to: jmcternan

The file you attached doesn't look like the image you attached.

Turn off the visibility of Solid6 and examine Solid4 - does this look right to you?

Turn off the visibility of Solid4 and examine Solid6 in the same area where Solid4 is (zoom in on those corners in the opening) - does this look right to you?

 

Shouldn't your existing geometry be about 5 features rather than the around 50 features you have?

Looks to me like you are doing too much work.

I recommend starting over.

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JDMather
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Registered: ‎04-20-2006
Message 3 of 11 (583 Views)

Re: Problem sweeping an arch around a rectangle

05-04-2012 07:09 AM in reply to: JDMather

As I start over from scratch myself - shouldn't these two arcs have a tangent constraint (added)?

 

Tangent.gif

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Active Contributor
jmcternan
Posts: 47
Registered: ‎09-29-2011
Message 4 of 11 (582 Views)

Re: Problem sweeping an arch around a rectangle

05-04-2012 07:12 AM in reply to: JDMather

I probably am doing too much work, but I am not very good at inventor yet.  The picture looks different because the picture is showing how I want the sweep to look.  The pictures shows the sweep on 3 of the 4 sides of the rectangle, but when I select the 4th side I get errors.  The attached model has the sketch that I am attempting to sweep.

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jmcternan
Posts: 47
Registered: ‎09-29-2011
Message 5 of 11 (578 Views)

Re: Problem sweeping an arch around a rectangle

05-04-2012 07:15 AM in reply to: JDMather

Yes there probably should be a tangent constrant.  I am attempting to modify someone else's drawing.

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JDMather
Posts: 26,186
Registered: ‎04-20-2006
Message 6 of 11 (575 Views)

Re: Problem sweeping an arch around a rectangle

05-04-2012 07:19 AM in reply to: jmcternan

I don't know if I can find the time to do this thing right - hopefully someone else will jump in here, but in general

you should (almost) never be using Delete Face or Extend Surface unless doing something complicated


(here is an example of complicated) Dogging It.jpg

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JDMather
Posts: 26,186
Registered: ‎04-20-2006
Message 7 of 11 (569 Views)

Re: Problem sweeping an arch around a rectangle

05-04-2012 07:22 AM in reply to: jmcternan

jmcternan wrote:

Yes there probably should be a tangent constrant.  I am attempting to modify someone else's drawing.


If I end up doing this - I will start over from scratch - I recommend that is what you do.

 

This doesn't look right either

transition..png

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Active Contributor
jmcternan
Posts: 47
Registered: ‎09-29-2011
Message 8 of 11 (568 Views)

Re: Problem sweeping an arch around a rectangle

05-04-2012 07:22 AM in reply to: JDMather

Ok, but should the arc typically be able to be swept around a rectangle?

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JDMather
Posts: 26,186
Registered: ‎04-20-2006
Message 9 of 11 (563 Views)

Re: Problem sweeping an arch around a rectangle

05-04-2012 07:26 AM in reply to: jmcternan

How are you going to make this?  Sheet metal parts?  Is that horn going to be 4 sheets or on molded part?

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http://home.pct.edu/~jmather/content/DSG322/inventor_surface_tutorials.htm
Active Contributor
jmcternan
Posts: 47
Registered: ‎09-29-2011
Message 10 of 11 (558 Views)

Re: Problem sweeping an arch around a rectangle

05-04-2012 07:29 AM in reply to: JDMather

I am building a model for an FEA analysis.  It would be 4 parts of sheet metal.

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