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How can I do this?

How can I do this?

How can I do this?

(OP)
I have this drawing of a part I need to make a model of. I have the revolved part completed which is the bore and OD taper. I am not sure how to make the swept features on the outside that follow the tapered at a helix and taper down as they go around. I someone could please help I would really appreciate it.

Thank you,
JT

RE: How can I do this?

I would say that you need to create a datum curve from an equation, create an equation based on cylindrical coordinates.

Then sweep a section along that datum curve.

RE: How can I do this?

I'd do the cylinder first...

Then put a draft on it...

Then put the helix on...

Then put the rounds on.

It seems quite straight forward.

RE: How can I do this?

It's not really straight forward, as the helix must follow the taper properly. I second Fawkes. You need to create the mathematical equation for the tapered helix. Once that's done, you should be able to sweep a section along the curve.

V

RE: How can I do this?

If the helical feature is tapered a Helical Sweep feature should fill the bill (see Help for a tapered example), but it looks to me like the helical feature in the drawing is constant diameter.  

(If a "true" representation is required there are other nuances that should be considered.  Similar to cutting a helical groove, simply sweeping a planar section probably won't bring home the trophy.)

RE: How can I do this?

If the helix is straight or tapered it make no difference.

Making it tapered can be as easy as adding a revolved cut at the end.  

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