how to make teeth on a surface?

how to make teeth on a surface?

chandosb90
Explorer Explorer
3,971 Views
25 Replies
Message 1 of 26

how to make teeth on a surface?

chandosb90
Explorer
Explorer

PXL_20240309_013214932.jpg

im trying to make this part and i cant figure out how to make the teeth/splines. someone please help, im a new fusion user and havent done cad in years.

0 Likes
Accepted solutions (2)
3,972 Views
25 Replies
Replies (25)
Message 2 of 26

jhackney1972
Consultant
Consultant
Accepted solution

From the picture it is hard to tell if the teeth are straight or have a radial taper, so I will guess and use a radial taper.  Also do not know any sizes or tooth count.  There also are other ways to make the teeth, I chose a Loft.  Model attached.

John Hackney, Retired
Did you find this post helpful? Feel free to Like this post.
Did your question get successfully answered? Then click on the ACCEPT SOLUTION button.

EESignature

0 Likes
Message 3 of 26

Drewpan
Advisor
Advisor
Accepted solution

 

Hi,

 

The easiest way to do this will be to make a sketch on the vertical plane the size of the teeth you want. Extrude the

resulting single tooth, then create a circular pattern of the number of teeth you want. You will have to select either

features or make the extrusion a new body and then combine the created bodies afterward.

 

Cheers

 

Andrew

0 Likes
Message 4 of 26

chandosb90
Explorer
Explorer

teeth are angled, there are 70 teeth, and their height is .03" length from edge is .15

0 Likes
Message 5 of 26

jhackney1972
Consultant
Consultant

There still is a lot of missing information so I will let you follow my method, if it suits, and use your dimensions.  Let me know if you need help on your model.  If you do, do not forget to attach your attempt. 

 

If you do not know how to attach your Fusion 360 model follow these easy steps. Open the model in Fusion 360, select the File menu, then Export and save as a F3D or F3Z file to your hard drive. Then use the Attachments section, of a forum post, to attach it.

John Hackney, Retired
Did you find this post helpful? Feel free to Like this post.
Did your question get successfully answered? Then click on the ACCEPT SOLUTION button.

EESignature

0 Likes
Message 6 of 26

chandosb90
Explorer
Explorer

part dia. 1.5"
overall height .25"
teeth height .03"
tooth length from edge .15"
center hole dia .25"

 

0 Likes
Message 7 of 26

chandosb90
Explorer
Explorer

i couldn't really decipher what was happening exactly on the timeline, but this is what i have so far.

0 Likes
Message 8 of 26

laughingcreek
Mentor
Mentor

if you want the teeth from one disc to be able to fully mesh with a second one when placed together, then you have to insure that the peak of the teeth are slopping down, the valley is sloping up, and the faces of the teeth are planer and not twisted/warped.

laughingcreek_0-1709957644105.png

attached is an example.

0 Likes
Message 9 of 26

jhackney1972
Consultant
Consultant

Attached you will find your defined model.  The process I used is rather length and I am sure others may have a better method and shorter method.  If you need explanation on how I created your model, let me know "personally".

John Hackney, Retired
Did you find this post helpful? Feel free to Like this post.
Did your question get successfully answered? Then click on the ACCEPT SOLUTION button.

EESignature

0 Likes
Message 10 of 26

jhackney1972
Consultant
Consultant

I never heard a peep from you after posting your finished model.  Did it suit your needs?  Do you have questions about it?  A little feedback would be nice.

John Hackney, Retired
Did you find this post helpful? Feel free to Like this post.
Did your question get successfully answered? Then click on the ACCEPT SOLUTION button.

EESignature

0 Likes
Message 11 of 26

evanp4509U4JZ
Collaborator
Collaborator

In sketch 1 the angle dimension is 360/number of teeth. Where do you enter the number of teeth?

0 Likes
Message 12 of 26

jhackney1972
Consultant
Consultant

It is a parameter.

 

It is a Parameter.jpg

John Hackney, Retired
Did you find this post helpful? Feel free to Like this post.
Did your question get successfully answered? Then click on the ACCEPT SOLUTION button.

EESignature

0 Likes
Message 13 of 26

chandosb90
Explorer
Explorer

hey sorry been busy with work and life. your post really did help for the most part, i got it completed and took it to the guy that was going to cut it on his cnc machine for me but theres a few problems. ill attach the file so you can check it out. 1st problem is he can only cut either 60 degree angle teeth or 90 degree, mine came out to 53 degrees, second problem is at the inside end of the teeth in my design the teeth have a slight overlap and im not sure what to do to remedy this.

0 Likes
Message 14 of 26

evanp4509U4JZ
Collaborator
Collaborator

I've never used them. How/where do you get into parameters?

0 Likes
Message 15 of 26

jhackney1972
Consultant
Consultant

If you have a Timeline, in other words Capture Design History, you use them all the time.  Every value you enter, offset distance, dimension value, pattern count, etc is captured as a Model Parameter and can be seen by feature in the Parameter dialog box.  You can create your own parameters, called User Parameters, and use them instead of, or along with, model parameters to control your model.

John Hackney, Retired
Did you find this post helpful? Feel free to Like this post.
Did your question get successfully answered? Then click on the ACCEPT SOLUTION button.

EESignature

0 Likes
Message 16 of 26

jhackney1972
Consultant
Consultant

If you have to change the tooth angle, then the whole design must be revisited.  If the diameter is maintained, the number of teeth will change.  If the number of teeth stay the same then the diameter will change.  Of course the general height of the teeth could be different and maybe maintain the count.  Lots of variables

John Hackney, Retired
Did you find this post helpful? Feel free to Like this post.
Did your question get successfully answered? Then click on the ACCEPT SOLUTION button.

EESignature

0 Likes
Message 17 of 26

chandosb90
Explorer
Explorer

the height, width, and number of teeth can change. i just need to know how to do it so its 100% correct so the guy can cut the part for me.

0 Likes
Message 18 of 26

jhackney1972
Consultant
Consultant

So what are your new design specifications?  Obviously I cannot read your mind, please post them.

John Hackney, Retired
Did you find this post helpful? Feel free to Like this post.
Did your question get successfully answered? Then click on the ACCEPT SOLUTION button.

EESignature

0 Likes
Message 19 of 26

chandosb90
Explorer
Explorer

i dont really have any new specific spec, the only "spec" that has to be corrected is the angle of the valley of the teeth has to be 90 degrees, the number, height and width of the teeth can change in anyway to make it work. this is completely out of my wheelhouse of things i know how to do well. im an auto mechanic, i dont run cad programs ever. the cnc guy that is willing to cut this part for me just cant justify spending the time drawing the design, so i told him i would figure out how to draw it myself. ive got it mostly figured i just cant get the teeth right to meet the angle hes able to cut the teeth at.

0 Likes
Message 20 of 26

jhackney1972
Consultant
Consultant

According to your design requirements the teeth taper to the center of the gear.  Since this is the case, the angle you mention varies along the length of the teeth.  I will have to pass on this as I if I try to model what you want, I am sure you will reject it and I will send a lot of time for nothing.  Good Luck.

John Hackney, Retired
Did you find this post helpful? Feel free to Like this post.
Did your question get successfully answered? Then click on the ACCEPT SOLUTION button.

EESignature

0 Likes