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Sweep Challenge

BHOoi
15-Moonstone

Sweep Challenge

Hi, I have been trying to model the geometry shown below using sweep. I managed to model its trajectory but not the final shape. I attached the stp file here for those who would like to give it a try. Appreciate you can share your technique to obtain the final shape. ThanksCapture.JPG


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1 ACCEPTED SOLUTION

Accepted Solutions
TomD.inPDX
17-Peridot
(To:BHOoi)

This is where I have to leave you to scratch your head a little and explore the existing model...

flower_stalk.PNG

hint: It is as simple as changing the sweep3 section, which is already tangent, by removing the line segment; then using the appropriate edge to sweep the right size cylinder through the part along the edge of sweep1. 

View solution in original post

7 REPLIES 7
TomD.inPDX
17-Peridot
(To:BHOoi)

Without digging into it too far, I am going to suggest that the 1st sweep is done with a VSS for a subtle spiral around a simple elbow.

The 2nd sweep is an arc profile about the edge of the 1st sweep.

edit... okay, 3 sweeps.  Yours has a cylindrical core which I didn't add, but the final sweep uses the 2 previous sweeps

This failed miserably when using a simple line/arc/line sketch.  I switched the original spine to a spline and it worked wonders.

Creo 2.0 commercial file attached

flower.PNG

BHOoi
15-Moonstone
(To:TomD.inPDX)

wow! nice ! Thanks !

Being more ambitious now,  I want to ensure the inner edge of the final swept surface lands exactly on the inner cylindrical surface, and tangent to it.(refer to the earlier step model) What should I change to achieve that ?

Capture.JPG

TomD.inPDX
17-Peridot
(To:BHOoi)

This is where I have to leave you to scratch your head a little and explore the existing model...

flower_stalk.PNG

hint: It is as simple as changing the sweep3 section, which is already tangent, by removing the line segment; then using the appropriate edge to sweep the right size cylinder through the part along the edge of sweep1. 

BHOoi
15-Moonstone
(To:TomD.inPDX)

Awesome !! BIG thank to you. With the same logic, I am now able to do model the geometry shown below !Capture.JPG

Patriot_1776
22-Sapphire II
(To:TomD.inPDX)

Nice!  Kinda looks like a kids toy where you roll a marble down the helix......

Or a kids slide at the park....

That's one wicked slide!  Hell, as an adult, I'D be riding it! 

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