Model a cut around a cylinder

[Anonymous]

Hi!

Trying to learn modelling in fusion.

How do I model the cut found on the drawing.

Thanks!

[michallach81]

Follow that topic: http://forums.autodesk.com/t5/design-validate-document/wrap-a-body-around-a-cylinder/td-p/6240765 it's a similar case.

Basically you need to use Coil tool, to cut curved part of a slot.

[Anonymous]

Ah thanks, I didnt see that.

I have tried it out, but cant understand how im supposed to get that R47 curve. 

[PhilProcarioJr]

@Anonymous

Do straight lined cuts and add the correct fillets after the groove is cut into the cylinder.

[michallach81]

1. Remove unwanted faces:

2. Add fillets, first is 47+half of slot wdith, and second "other way":

Of course on both ends.

[michallach81]

One more thing, your model is not accurate, and coli didn't made the job as it should. Tomorrow I will take some time to make it correct.

[Anonymous]

Thanks for taking the time to help me!

The coil cut looks like its been cut by a triangel and not a square.

Looking forward too your model. 🙂

[michallach81]

Section is rectangular as it should, what worries you is just how it looks, but it's expected. What worries me is that coli starts in a wrong place (that way you had to remove some faces), so it's not exactly as on your drawing. I want to give some explanation, so you'll be good to solve similar problems by yourself, but I need some time to do that. Today's evening (Europe) I will make that.

[Stuart-H]

Sorry to but into this thread

I have a similer job todo mine is  just a quarter turn helix on a 18 mm shaft in 37 mm ( its for a corliss govener model )

the question is can Fusion360 do the CAM for this operation ( yes I know its a 4th axis job )

I can hand code it 

(

G01 X37 A90 F50

That command will move the X-axis 37 millimeters and simultaneously rotate the shaft 90 degrees.  This assumes you have mach3 setup with the 4th axis in degrees where A360 turns the shaft one full revolution.  The F50 specifies a feed rate of 50 millimeters per minute for the fastest moving axis.  )

again sorry to go OT

Stuart

[michallach81]

It's harder than I initially thought, I'm almost there... I need more time

[Anonymous]

Have you been able to make that cut according to the drawing?

/T

[michallach81]

Hi Tobias, I was working for a while on that. I've almost get that job done, nearly... Model I've attached should fit tolerances (+0,1; +0,3) from drawing, but It's not accurate. Today I don't have time to give full feedback, but at weekend I should be able to record some explanation, and there will be a lot of it.
Check my model maybe it's enough for now.

Michał