Best way to assembly two components 1

[dejan95]

Hello everyone.

I have recently graduated and I have started working in mechanical design field. As it goes, I'm still lacking some experience.

I wonder what would be the best way to mount two components together? i would like to mount shaft collar and part next to it ("spacer"). The spacer is used so the collar can be operated.

Below is the picture of the whole part and picture of a spacer. I can modify the spacer to be bigger in diameter or any for or shape.

I was thinking about welding the parts together (they are made of aluminium) or to use screws, but this is not optimal in my opinion.

Picture of the entire part. This is a "spool flange". It keeps a roll of material from telescoping or otherwise deforming while unspooling under tension.

I'm looking forward to hearing your suggestions.

 

[Jboggs]

The spacer looks like a simple part. Is there any reason it couldn't be a permanent part of the spool flange? No matter how you do it, I'm not comfortable welding to a part that must flex in its operation. Sounds like a recipe for fracture and failure to me. I think I would just modify the spool flange in some way so that a separate spacer is not needed every time it is handled, or just attach a spacer to all spool flanges and be done with it.

 

[BrianPetersen]

What's the frequency of assembly and disassembly?

If this is what I think it is ...

The "roll of material" is something operators change out routinely and frequently during normal operation. The material runs out, they stop the machine, they pull the empty reel off and install a new one (using a lifting-device, jib crane or some such) then restart the machine and carry on. The reel is intentionally a loose, sloppy fit on the shaft because it has to be easy to remove and install.

If that's what it is ... It has to be done very simply and without tools. It also doesn't matter if the reel is positioned all that accurately. It just has to not fall off. There's practically no end-thrust to contend with.

Now, you tell us if that's an accurate guess, and if not, why not.

 

[dejan95]

@Jboggs thank you for your answer.

The spacer is screwed to the spool flange so it is combined. But I have trouble figuring out how to attach shaft collar (yellow and grey part" to the spacer. Because I would like to make it simpler for the worker (otherwise the worker has to take off the collar first and only then he can take off the entire cover).

 

[dejan95]

@BrianPetersen thank you also for your engagement in the matter.

It is almost correct guess. The material is replaced about 10 times a shift. But the cover is removed manually (by hand) without lifting device. That is why I reduced the weight of the part and i would like to make it easier to lock and unlock. The system we currently use is even more complicated.

I think that this method with shaft collar is quite easy to use. I would only like to make the collar part of the cover so it doesn't get lost, and so it is easier to operate.

 

[rb1957]

the point of the jam lever is to hold the disc from travelling down the shaft. What about a quick release pin, into a cross bore hole ?

another day in paradise, or is paradise one day closer ?

 

[Jboggs]

Oh, so you want the collar to be permanently attached to the spool flange. I think there are some options out there.
You might contact this company and ask if they have a version of their locking collar that can be permanently attached to a flange. They seem to have a lot of winding epxerience.

https://www.magnetictech.com/fastlock/

 

[rb1957]

does the spool flange always sit in the same position on the shaft ?

another day in paradise, or is paradise one day closer ?

 

[dejan95]

@rb1957

Yes it does.

I have attached pictures. The first is the one I wold like to change. The second one is, by what the workers have told me, acceptable.

 

[FACS]

I just want to say this about your handles .... OUCH!

 

[dejan95]

@FACS

Handles won't be positioned there, there might even be no handles (there currently are none). I just forgot to remove them before taking screenshot

 

[rb1957]

"handles" ? … those things sticking out from the disc ??

if you're replacing the jam lever with a threaded handle (I'm assuming that the obvious handle (mounted on the shaft) is turned into position) … how to ensure it is properly installed (not too loose, not too tight … as I imagine it is securing the disc against the stock (on the other side). The disc turns (yes?) … so what's to stop the handle turning (loosening) ?

another day in paradise, or is paradise one day closer ?