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Helicoidal geometry

Posted 26 nov 2012, 06:59 GMT-5 Geometry Version 4.3a 6 Replies

Carlos Perez de la Blanca Castellano
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Hi everybody,

I would like to know how to create an helix along a cone surface (3D)?

I want an helix determinated according to the cone shape.

Thanks
6 Replies Last Post 29 ago 2019, 16:07 GMT-4
Edgar Kaiser
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Posted: 1 decade ago 26 nov 2012, 08:13 GMT-5
Carlos,

why not use the built in helix geometry and define axial and radial pitch according to the cone angle?

Cheers
Edgar
Carlos, why not use the built in helix geometry and define axial and radial pitch according to the cone angle? Cheers Edgar
Carlos Perez de la Blanca Castellano
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Posted: 1 decade ago 26 nov 2012, 08:43 GMT-5

Hi Edgar,

Thanks for your reply and help!

I have tried what you have just told me but I do not find the correct relation among cone angle- radial pitch....the helix "cut" the cone while it grows up.

My cone angle is 30º....how do you suggest me to do it??


Thanks!!
Hi Edgar, Thanks for your reply and help! I have tried what you have just told me but I do not find the correct relation among cone angle- radial pitch....the helix "cut" the cone while it grows up. My cone angle is 30º....how do you suggest me to do it?? Thanks!!
Edgar Kaiser
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Posted: 1 decade ago 26 nov 2012, 09:21 GMT-5
I think it should be like:



I tried it and it works perfectly. The centerline of the helix is exactly on the cone surface.

Cheers
Edgar
I think it should be like: [math] \frac{radial pitch} {axial pitch} = -tan30 [/math] I tried it and it works perfectly. The centerline of the helix is exactly on the cone surface. Cheers Edgar
Carlos Perez de la Blanca Castellano
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Posted: 1 decade ago 27 nov 2012, 06:23 GMT-5


Thanks Edgar!!!

It works perfectly....I was doing something wrong!

Thanks Edgar!!! It works perfectly....I was doing something wrong!
Carlos Perez de la Blanca Castellano
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Posted: 1 decade ago 28 nov 2012, 11:03 GMT-5


Edgar,

I would like to create an helix, but not with a circle.

I mean, I would like another shape created by me (similar to a triangle) and then, develop the helix.

I have tried with REVOLVE, but I only achieve a revolution instead of an helix.

Thanks in advance!!!
Edgar, I would like to create an helix, but not with a circle. I mean, I would like another shape created by me (similar to a triangle) and then, develop the helix. I have tried with REVOLVE, but I only achieve a revolution instead of an helix. Thanks in advance!!!
Jeff Hiller COMSOL Employee

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Posted: 5 years ago 29 ago 2019, 16:07 GMT-4
Updated: 5 years ago 3 set 2019, 13:12 GMT-4

Too late for Carlos, but for future readers of this thread: you can sweep any shape along a curve, so by using a helix (created with a parametric curve) as that curve you can generate the helix you want.

Jeff

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Jeff Hiller
Too late for Carlos, but for future readers of this thread: you can sweep any shape along a curve, so by using a helix (created with a parametric curve) as that curve you can generate the helix you want. Jeff

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