Problem - Not able to create bolt connectors in Simulation

[Aadithya01]

Kindly see the below screencast link where I am facing trouble in creating the bolt connectors. 

http://autode.sk/2h4D6Kf

Eventhough it is a proper cylindrical surface . I am facing trouble in creating the bolt connectors during Simulation especially on the red plate.

- Please use the below link for downloading the file

http://a360.co/2jsmMn0

[James.Youmatz]

Hi @Aadithya01,

Can you post another download link to the file? It gives me an error message when trying to download it.

Thanks,

[Aadithya01]

Hey Good Morning @James.Youmatz

http://a360.co/2x5W1tF

Sorry for the inconvenience . Kindly check this  

[mcmillr]

Hi, I checked your file and Fusion is recognizing the face is a Cylinder, but it doesn't think it is 'convex'. We very well may have a bug in the logic that determines convexity. It looks like these parts were created in another CAD tool and imported into Fusion? I don't know if that fact is important, but if you do have the original CAD file for the red part, please provide it if you can. It may just be a numerical oddity. We will log a defect and look into the issue.

One workaround I could suggest would be to use the hole command and pick near and existing hole, then grab the center of the new hole and drag/snap it to the center of the original hole. You will need to make the hole slightly larger and press ok. Then move the timeline before the new hole, click on the old hole and press delete, then move your timeline marker back to the end. You can then edit the hole and make it 9 mm diameter again. You will now be able to select the face for threads.

I realize this is a pain, sorry for the inconvenience. We will try to get this fixed asap.

[mcmillr]

I have a fix for this, it is just a numerical tolerance issue that appears to happen in rare cases. I should be able to get this into the next update of Fusion.

[Aadithya01]

Hey @James.Youmatz

The customer just gave me this file - which he got from his OEM customer . So I wont be able to get the original red part file .. And nice to know that this bug was identified- I actually own a PDMC license and actually there was no problem in creating the bolt connectors in Nastran IN CAD and did a modal analysis in it . I just wanted to cross check my analysis and thought out reciprocating the situation in Fusion 360 Ultimate as well. But unfortunately came across this bug. - Please try to solve this issue through the next update  @mcmillr

Thank you so much for your consideration on this problem and for your support .. Eagerly waiting for the update ..  

[dzid_]

https://a360.co/38GMzOq

I created a model and was trying first to put it on the concave surface. Didn't work somewhat understandably. 

So I created these little nubs just for the purpose of simulation, but I am still not able to place bolt head.

(These holes are extrusion cuts.)

Later I've read that maybe using Holes feature may solve the problem. But the holes cannot be created on the nub face properly, even though it's flat!  

The hole looks like that if I try to use Hole feature:

It related to this issue, that I created because originally, as I said, I was trying to put holes directly on the concave cylinder. 

So now I am out of ideas.

[dzid_]

I somehow solved it.

For some reason, Fusion thought the face of the nub wasn't flat. That's why it didn't want to place the Bolt head and wasn't drawing hole correctly. 

I slightly modified the sketch of the nub extrusion and somehow the problem disappeared. Now Fusion correctly thinks the nub face is flat and both Hole and circle extrusion work for placing a bolt head in simulation.