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How to model spiral gate


bmckelvie

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I have been racking my head trying to figure out how to do this in IronCad

 

I am trying to model a spiral that starts flat and ends up vertical 270 degrees away.

 

Think of a thread or auger flute but without the shaft in the middle and that only makes one 270 Degree rotation. I am using it as a gate to control flow, on the flat full flow will be allowed through then if I rotate 270 degrees, no flow will occur.

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I found a way but I am not overly happy with the results and found a lot of bugs an limitations in the process.

 

Using loft I created 2 rectangles 270 degrees apart from each other, and the second one higher than the first. Then I created spiral 3d sketches that went from corner to corner of the rectangles. See Gate_3.png

 

Then in the loft command I used the important point feature to correct IronCads bizarre default choices for where to loft too.

 

Ironcad unfortunately leaves weird artifacts around the loft, I sort of got around them by making my loft a larger diameter than it needed to be and then using a hollow pipe to trim the outsides neat.

 

I also had to work around the fact that Ironcad can not loft to the second rectangle if its bottom corner is the same point and the first rectangles top corner. I got around this by leaving a space, then duplicating the loft lower to fill in the open area left by the workaround.

 

There are still a few artifacts I need to get rid of, but it is getting close to what I wanted

 

I attached a few pictures to try to make more sense of this.

 

 

 

gate_1.PNG

gate_2.PNG

Capture_3.PNG

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I am not sure exactly what you need but I think you should involve sweep. Loft is a bit to free form.

Maybe this shape can help:

45599[/snapback]

 

 

Thanks, that is a lot closer to what I was looking for.

Edited by bmckelvie
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