Helical Protrusion Parallel to the Axis of Revolution
Helical Protrusion Parallel to the Axis of Revolution
(OP)
Hi All,
I am trying to create a helical protrusion along the inner diameter of a cylinder. The problem with using the helical protrusion tool is that the cross section needs to be sketched perpendicular to the axis of revolution. I need to sketch parallel to the axis of revolution.
I thought I could generate a datum curve and then create a sweep, but that isn't working out well. Here is the datum curve and the datums I am referring to:
ht tp://i941. photobucke t.com/albu ms/ad260/n sgoldberg/ Pro-E/Datu mCurve.jpg
ht tp://i941. photobucke t.com/albu ms/ad260/n sgoldberg/ Pro-E/Datu mCurvewith Datums.jpg
The helical sweep creates "kinks" in it, and it also only allows me to sketch perpendicular to the end of the spline, instead of on the front plane. The sketch comes out wrong due to this issue.
http ://i941.ph otobucket. com/albums /ad260/nsg oldberg/Pr o-E/Helica lKinks.jpg
http://i9 41.photobu cket.com/a lbums/ad26 0/nsgoldbe rg/Pro-E/H elicalKink sFront.jpg
I'm hoping someone has dealt with this problem before and knows an easy solution to the problem.
Thank you in advance for any advice you can give.
-Nick
I am trying to create a helical protrusion along the inner diameter of a cylinder. The problem with using the helical protrusion tool is that the cross section needs to be sketched perpendicular to the axis of revolution. I need to sketch parallel to the axis of revolution.
I thought I could generate a datum curve and then create a sweep, but that isn't working out well. Here is the datum curve and the datums I am referring to:
ht
ht
The helical sweep creates "kinks" in it, and it also only allows me to sketch perpendicular to the end of the spline, instead of on the front plane. The sketch comes out wrong due to this issue.
http
http://i9
I'm hoping someone has dealt with this problem before and knows an easy solution to the problem.
Thank you in advance for any advice you can give.
-Nick





RE: Helical Protrusion Parallel to the Axis of Revolution
RE: Helical Protrusion Parallel to the Axis of Revolution
Thank you for taking the time to generate that model. Unfortunately, the model seems to have the same issue I was having - the circle is drawn on the correct plane but since it follows the trajectory of the curve, it is completely distorted. What I would like is for that circle to keep it's shape throughout the entire length of the curve. The circle would remain perpendicular to the axis of the cylinder.
I attached a few screenshots showing the distortion.
This is the correct way I would like the sketch oriented:
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But notice the circle follows the path of the curve:
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A side view with hidden lines demonstrates this even further:
http://i
Once again, thank you for your help. I hope with this bit of information you will understand what I'm shooting for.
Thank you,
Nick
RE: Helical Protrusion Parallel to the Axis of Revolution
RE: Helical Protrusion Parallel to the Axis of Revolution
RE: Helical Protrusion Parallel to the Axis of Revolution
Thank you for your help. The previous part file is exactly what I'm looking for. However, I cannot re-create your method. I am on Wildfire 5 and I believe you are on an earlier version or pre-wildfire version (due to the "protrusion id" label). Can you please explain how you achieved this result?
I tried numerous methods to no avail. I would still like to be able to use the datum curve I generated, but when I try to select the curve using the sweep tool I get the message:
"Specified trajectory is not valid. Please reselect."
Thanks again,
Nick
RE: Helical Protrusion Parallel to the Axis of Revolution
RE: Helical Protrusion Parallel to the Axis of Revolution
RE: Helical Protrusion Parallel to the Axis of Revolution
Here is an image of what I am talking about:
http://i
RE: Helical Protrusion Parallel to the Axis of Revolution
I checked out your model and I see that it has the same problem I experienced earlier, where the circular cross section is not maintained. See the image below:
http://i
I would like the cross-section to remain perpendicular to the path of the trajectory (I incorrectly phrased this earlier, which led to some confusion).
I appreciate the help,
Nick
RE: Helical Protrusion Parallel to the Axis of Revolution
RE: Helical Protrusion Parallel to the Axis of Revolution
RE: Helical Protrusion Parallel to the Axis of Revolution
RE: Helical Protrusion Parallel to the Axis of Revolution
RE: Helical Protrusion Parallel to the Axis of Revolution
RE: Helical Protrusion Parallel to the Axis of Revolution
I followed the steps in aafuni's VSS file. Turns out Pro/E will not use a datum curve, it must be a sketch. A little trig and I got that working. Also, the sketch had to be inside the cylinder by a distance equal to double the thickness of the cylinder. I sketched the shape of the helical feature and it looks beautiful.
Thanks for all the great help. It's greatly appreciated! :D