Aligning two parts with the same thread so the faces on the component line up...

[AntR32Bool]

Hi Everyone g g

this is my first time posting here' So please excuse me if I've placed this post / message in the wrong place..

I've been using fusion 360 for the past few months, for personal use only & designing  & 3D printing my projects. 

however i seem to have come across something I'm not familiar with & everything I've tried to solve this has failed so any help on creating this would be very much appreciated 

....i have a 10 sided polygon on both components and its essential they line up when screwed together .

i can create threads without any bother ...but matching them together is unfamiliar territory is there a way to duplicate threads from one piece to another ?

photos inc ..........I've threaded the bottom section so you can see what I'm trying to achieve but not the top 

thanks in advance 

[Trigg3r]

https://forums.autodesk.com/t5/design-validate-document/how-to-motion-link-a-threaded-nut-and-bolt/m...

Take a look here. Lots of info on threads and alignment.

@Beyondforce explains how to cut one body with another to form a perfectly matched thread.

[davebYYPCU]

I had to do that yesterday, 

using Combine, will give you a 1:1 fit with no tolerance. Creating the offset might be hard work, but Fusion  matching threads had the tolerance built in

The steps in your case, how I did mine

thread on the lid as normal

use Split body to separate the thread lip from the top polygonal section with the shoulder face. (Temporary)

move / join the lid component to the container in correct position.

Make a section analysis on centre of the model, 

To line threads up, rotate the thread body so the there is consistent alignment - mine needed 180 degree turn, 

use Combine Join to both parts of lid, don't keep the tool body. 

For 3d printing you will need a tested fit for the angles to line up, sorry about that

Might help...

[AntR32Bool]

Thanks for the help regarding this. It really had my head in a knot. I split the top into two pieces & then made  them separate components transferred them into the other folder & assembled as required with the threads lined up and all faces parallel ...

can i just rejoin the parts with the joint /rigid option ?  or do i have to use another ? 

[davebYYPCU]

That's strange, as built joint - rigid, should be very easy.

I used split body but same component.

[AntR32Bool]

i apologise for my lack of knowledge on this subject'.as I explained I'm not exactly new' as I've been using fusion for around 2/3 months daily'  but I've never made an object such as this especially  one with threads that need lining up with faces. or in fact splitting body's or faces.& how to use them properly.

The reason i made them into separate components was. After i'd split them & transferred them into the folder containing the bottom section. I joined the top to the bottom & I couldn't figure out how to move the threads independently to the top ...& align the threads ....& i still can't 

[davebYYPCU · Accepted solution]

I am sending you a Private Message, will show up on the top right of this forum page.  Can explain in that how we can get you going, won't clutter this thread for the short term.

[AntR32Bool]

thanks fort the PM, I did try to reply however i seem to lack the privileges todo so or so it informs me : )  it was more than helpful & it solved my problem using tis function & where i was going wrong ...

Many Thanks  Anthony 

[davebYYPCU]

Thnaks Anthony, happy to help,

So that the thread is complete, The proceedure outlined in the later half of my first post here, was explained in more detail,

Move / Align, split body, rotate the thread section without the poligon section moving, then combine join sections together again.

Browny

[Anonymous]

Would a similar effect be doable by only modeling one half of the treads then using that body (or portion) as a cutting tool on the other body?  I assume where the treads start/end is carried over into the cam toolpath portion of the software as long as they are "modeled"? 

Thanks, -Dan.

[davebYYPCU]

That would be a Yes and No.

Yes you can use the original to develope the secondary with Combine cut.

No, because it would result in no tolerance, not a slip fit, but adding tolerance is not in the Combine cut without further steps or procedures.

Inside / Outside matching Threads have that tolerance provided.

Might help...

[AntR32Bool]

Hi Dan 

 Yes you can do it that way as well. But after you’ve used the tool to cut the thread. You’ll need to give the newly cut thread a new offset as they won’t thread together. So Select the thread you’ve made, then the push pull feature. When the box appears it should read automatic

( centre box ) change that to new offset then enter a  - minus number To remove some material.  If you need any more help please ask away & i’ll Do my best to assist 

thanks Anthony 

PS My apologies 

I thought you we’re messaging me & davebee probably knows much more than I. So I’d probably take his advice over mine 

regards Anthony 

[Anonymous]

Thanks Anthony, 

I'll give that a try and report back. I was figuring I could just use a "stock to leave" offset to get the clearance I need, but it's certainly nice to have it actually modeled.