topic Re: Gear teeth features in Inventor Forum

Gear teeth features

Anonymous — Fri, 16 Jul 2021 11:30:28 GMT

Hello,

I was hoping someone could help me model these interesting features on gear teeth. I've been trying for a long time and I have no idea.

Polišenský

Re: Gear teeth features

Casey.P — Mon, 19 Jul 2021 12:56:06 GMT

Are you willing to share your file so that we can help solve your issue?

Thank you!

Re: Gear teeth features

JDMather — Mon, 19 Jul 2021 14:57:48 GMT

From the tool marks you can see how it was done in the real world.
I would do it essentially the same in Inventor.

Attach your *.ipt file here if you can’t figure it out.

(Did you Export you cosmetic tooth profile to true involute teeth?)

Re: Gear teeth features

Anonymous — Mon, 19 Jul 2021 15:37:55 GMT

I think I figured it out. Anyway, I'm attaching a file so you can see how I did it. Perhaps there is a better way.

Re: Gear teeth features

Anonymous — Mon, 19 Jul 2021 15:40:26 GMT

I definitely didn't change the tooth profile. I kept it as it was.

Re: Gear teeth features

JDMather — Mon, 19 Jul 2021 17:22:41 GMT

@Anonymous wrote:

I definitely didn't change the tooth profile. I kept it as it was.

What is your purpose for this model?

If all you want is something that sort of looks OK (cosmetic) then the simplified tooth profiles might be OK, but if you want to model a real gear...

Re: Gear teeth features

Anonymous — Mon, 19 Jul 2021 20:51:08 GMT

I would like to have it as real as possible. Unfortunately I don't know how to do it. Is there some sort of tutorial online?

Re: Gear teeth features

johnsonshiue — Mon, 19 Jul 2021 21:10:09 GMT

Hi! The precise geometry in this case has to be created using Solid Sweep. Try defining the cutting tool and identifying the path. Next, use Solid Sweep to create the "cut" volume. Then, mirror and pattern it. Lastly, use Combine feature to cut the body.

Many thanks!

Re: Gear teeth features

JDMather — Mon, 19 Jul 2021 21:46:36 GMT

@Anonymous wrote:
Is there some sort of tutorial online?

3:10-

Re: Gear teeth features

IgorMir — Tue, 20 Jul 2021 12:43:30 GMT

Here it is. IV2020 file. The model is far from being the optimal but it might give you a starting point.
I will put some more thoughts into it later on.

Cheers,

Igor.

Re: Gear teeth features

WHolzwarth — Wed, 21 Jul 2021 07:33:18 GMT

Many years ago I've been working in this industry. The procedure is called gear tooth chamfering, with special shaped milling tools.

It can be done with fixed workpiece, milling one tooth, and then rotating the workpiece to the next tooth. Two tools are working on different positions, one for each side of the roof.

Another method is done with continuous rotation of the workpiece, and synchronized motion of the tool. See an old-time video, for only one tool shown.

Re: Gear teeth features

IgorMir — Wed, 21 Jul 2021 08:08:17 GMT

Thanks, Walter.
I hope - the OP will appreciate our efforts. 😊
Here is one more attempt to create the cut (IV2020). It is a bit cleaner to what I have posted yesterday. But still - the depth of cut (controlled by d77 parameter) is a manual work. I am missing something obvious in creating the cutting geometry, but can't pin point it yet.

Cheers,
Igor.