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Hello,
I am a year 11 student at a highschool in Canberra, Australia. As a part of a school assesmrnt i am trying to create a skrew in boat anchor that can hold a small boat. I am trying to create a spiral that has a different distance between revelutions as it goes up. (see photo below) this is what i am trying to achive however am unsure on how to do.
If you have any ideas i would love to hear and it would be greatly appriciated. the closest i got was a spiral from a coil however that is not the requireed shape i was trying to achive.
I think there are add-ins that will allow you to create a curve from an equation, which may produce better surface quality, but the attached is one approach you could use to do it all with just fusion-
An inelegant way.......It won't solve your tip needs but multiple simple coils (one rotation Each) of increasing heights will get you a "steepening" path to use in a subsequent sweep.
To me it looks like the pitch on the parallel section of the central tube is one constant pitch and the part on the point is a finer pitch. What I also notice is the flute changes size all the way up the part. Because the flute changes shape you're going to need to use loft to make the shape, not a simple sweep with twist. I think making the helical path\paths for the loft will be quite difficult.
You can create a single path from a swept twisted surface but I'm not sure a single path is enough for the loft to work without it twisting.
Mark Hughes
Owner, Hughes Tooling
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