#AAD loose bolted connections?

[n.schotten]

When i insert several Bolts in one go, using a part with several holes pre designed, only the first 'master'bolt is properly constrained, and the others can be dragged around. This is a bother. and constraining one of the other bolts helps to fix them inplace. But if something happens (BC recalc or hole movement that extra constraint incurs an error warning.

How does this work? Why can the bolts move around? and how to properly fix it?

gr,

Niels

[Dennis.Ossadnik]

Hi Niels,

could you share a simple data set?

[n.schotten]

Here is a PnG.

Not quite sure why it is as big as it is...

[Dennis.Ossadnik]

Hi Niels,

thanks for the data set.

You can do the following steps to get it working:

- Select bolted connection and ground it

- select same bolted connection and use Component > Automatic solve

- repeat the steps for the remaining bolted connections

Bolted connections should snap in the correct position now and you cannot move the bolts around anymore.

Could that be an option?

[n.schotten]

Hi Dennis,

I'm afraid that grounding will not work.

Quite often it would be on parts that need to be able to move around. And having a grounded bc in the mix locks that up.

grtz,

Niels

[Dennis.Ossadnik]

Hi Niels.

hmm...what about using one constraint to prevent rotation of the bolted connection assembly.

Just use an angular contraint and use one of the origin planes of the bolted connection assembly.

What about this?

[n.schotten]

hi. we could give it a try. then editie the BC and see if an error/warming shows up.

Sent from my Cyanogen phone

[n.schotten · Accepted solution]

Using the angle constraint, using the BC's origine plane, seems to work.

Using a normal constraint to constrain a bolt axis to it's hole axis works, insofar as that when you play around with the bolts (adding/removing some) this constraint may pop an error or move the BC about.

However, i feel that this is a shortcomming from IV that Autodesk should look into. We, the users, should not have to do extra work to get a series of bolts to play nice.

[lance3]

I see this hasn't been solved in INV 2021

Bolted Connections - having to manually go through multiple assemblies to update holes etc seems like so last century.

In the past it was a well worthy while feature - being able to put holes into FG parts is an extremely handy feature.

If the holes move then the frame member updates, making sure the STP files I usually generate get updated is a slow task, but worth it.