Weld Question

[Bishop]

Okay, so I've got these two things I need to weld together. In the real world, with these two pieces in front of me, I could easily make the welds .... it's just that I'm not sure how to do it in Inventor.

 

(This is a real object, made from the blueprints. This is actually how the parts fit together. I've seen, handled, and used the real thing. If it is to be made in an authentic manner, the parts will look like this.)

 

My problem is the gaps at the bottom and in the corners. Fillet welds won't cut it, because they require the sides to interface. Groove welds keep telling me that the weld cannot be computed.

 

 

Any suggestions?

[JD Mather]

Can you attach the assembly here?

[Bishop]

Can you attach the assembly here?

 

 

Attached. 3 ipt's, 1 iam, spread across 2 .zip's.

 

 

Thanks!

magazine housing 1.zip

magazine housing 2.zip

[JD Mather]

I noticed that your sketches aren't constrained? You should have the origin center point set to AutoProject. You might want to read this document http://home.pct.edu/~jmather/AU2006/MA13-3%20Mather.pdf

[JD Mather]

I am curious about what machining process is used to make the cut holes? I would expect to see fillets in the corners. Are they milled or broached or EDM or is the part cut and then rolled? Or other process?

[JD Mather]

I noticed the corners in the Magazine Housing are not uniform thickness. Does this represent the actual part?

[JD Mather]

Is something like this what you are after?

[Bishop]

Yes, that is EXACTLY what I'm after!!!!! How did you get that?

 

 

As for the machining process ... I'm not sure what the original process was, actually. This is taken from the original prints - it's a Sten MkII submachine gun - but I'm guessing the square holes were probably drilled at the corners and then sawed out, but I could be completely wrong. The prints don't show any fillets at the corners, though. (No, I'm not planning to actually build one of these ... I just happened to have the blueprints laying around.)

 

The magazine housing is like that because I haven't figured out the sheet metal tools yet. It's originally supposed to be stamped and folded, with the seam on the upper edge of the side that has the large square cutout in it.

 

I'm working now on figuring out the sheet metal stuff because the trigger is also a folded part, and so is the magazine.

 

 

Thanks for that about the constraints. You'd mentioned it another time, but I hadn't figured out how to do it. This should make things a LOT easier!

 

 

... now how did you get that weld?!?!?!

[JD Mather]

The magazine housing is like that because I haven't figured out the sheet metal tools yet.--- ...

I'm working now on figuring out the sheet metal stuff because the trigger is also a folded part, and so is the magazine.

 

Sheet metal tools only automate the process. The geometry could be done correctly with the standard tools - you don't need to know the sheet metal tools.

 

I recommend you go back through that document I linked and learn the basic stuff first.

 

.... now how did you get that weld?!?!?!

 

You have a larger gap on one side than the other. The fillet needs to be large enough to cross that gap. The square hole on the side of the magazine creates a problem for creating the weld. Remove the cut and add it at the assembly level after the weld.

 

If you have ever done any welding you know that it is an art done in almost blind state. To expect a software to produce art is asking a bit much. But the way I got the weld bead is to remove the cut as indicated above. Select all of the sides of the magazine in the first selection and the cylindrical side as the second selection set.