Keyway in multibody

[Anonymous]

Hello !

I have a problem. I made a multibody shaft, which is made of 2 pipes (1 in 2 instances) and some round sheet metal parts - all in one multibody file. Here is an example:

Then of course I create all the parts necessary for this and input them into assembly, which I convert to welded assembly.

Now I want to create a keyway through all of the parts in the assembly. Unfortunately Inventor sees them (after "welding" as different parts and therefore I cannot make a keyway through all parts:

What can I do? Well I can convert the assembly to single ipt file and then make a keyway but I would like to keep welding available. Should I omit converting it to welding assembly and draw weld dimensions on a drawing? Any help would be appreciated.

p.s. I use Inventor 2015.

[PaulMunford]

Can you put the key way in in the multi body?

If you derived the parts with the 'make components' tool the parts will all update to include the key way feature.

[WHolzwarth]

Hmm. Came in here ok, with an attempt in 2016.

Attach your files for a new test with 2015.

Walter

[Anonymous]

Sorry I didn't think and did not include the parts.

I can upload only 3 attachments therefore will post another 2 elements in next post. 

[Anonymous]

Another part.

[WHolzwarth]

tmp_walek_wstepny.ipt and Połączenie wpustowe1.iam are missing

[Anonymous]

Sorry bad version. Now should be fine.

[WHolzwarth]

Perhaps like this (2015 files in zip)

[skylinejeff]

Just out of curiosity, how did you create the keyway that you show in your second photo?  I don't see any "plus" sign next to the machining node of your weldment drawing (that's the only reason I ask).

Second question...how will this part actually be built in real life?  Will you manufacture each individual subcomponent including the portion of the keyway for that component, then alogning the keyways when you weld it together?  Or will the whole thing be welded together first and then the keyway broached through the entire shaft (which is probably the better and more practical way to minimize frustration of the guys doing the welding!)

The second question should influence your choice of process.  If it's the first way (each part gets its portion of keyway machined prior to welding) then the workflow suggested by others in this thread would be good.

If it's the second way, I would think that using the "Machining" option in the weldment and creating a sketch then extruding it through the whole weldment is the proper way to do it.  You might have to make sure the "participants" are selected for the operation (same as you would for a hole in a multi-body part or a multi-part assembly).

[Anonymous]

@WHolzwarth know I can do this by extruding, and it works fine in multiody ipt file. But there are two problems with that:

1) should I change the diameter of the hub, the "extruded keyway" will not update itself (In 2015 neither will  DesignAccelerated keyway be updated but it'ś just a matter of measuring the hole size and it's done).

2) since the keyway is standardised I would like not to bother with the dimensions necessary for creating it.

@skylinejeff to answer your question: In the second photo there is no keyway yet.

Second: I wouldn't like (and the welder) to machine the parts with keyway - it would be terrible to set them correctly up before welding.

I know that extrusion would work but it's not good enough for me. I was just asking if it's possible to do it the way I want it to be done in Inventor 2015.

p.s. @WHolzwarth did yo use keyway design accelerator to do this (your first post in this thread). 

[WHolzwarth]

No, I used an extrusion.

In the attached video I used a workaround for getting the Extrusion sketch out of the keyway generator, but it's no quick way of doing. And it doesn't update after changes. A keyway table in iLogic would be better.

I'd think of that as an idea for improvements of the keyway generation in weldments.

Walter

[Anonymous]

Dear Walter. That's the way (more or less) I did it. Thank you for the video (kudos for you).

I think it's definitely worthy of reporting to Autodesk - since the part has been welded it either should be treated as one (with a possibility of modifying the parts that create the welded part) and/or there should be a possibility to choose multiple bodies when editing the structure. I will give it a try and report it to Autodesk.

@PaulMunford I can't create a keyway (the one from generator) in multibody part as it is ipt file. When I derive components and put them into assembly I cannot choose multiple bodies for a keyway (you can do this for extrusion though).

[PaulMunford]

Ah! Are you using the Keyway Generator? Sorry - I missed that.

Paul