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-   -   Dimpling problem (https://vansairforce.net/community/showthread.php?t=176582)

danielweberdlc 11-02-2019 05:56 PM

Dimpling problem
 
I'm trying to learn how to build by building the RV training kit and I ran into an odd problem I can't explain. I'm building the first piece, where you drill 12 #40 holes, dimple and then rivet two pieces of sheet together.

I'm using the Cleaveland tools dimple die sets and C frame.

After I dimpled the holes I was surprised to see my 3/32" cleco's would not stay in the holes, which had somehow enlarged. I'm at a loss to understand what I did wrong. I'm positive I used the correct dies and drill, as the pieces were cleco'd together before I dimpled.

Is it possible to over-dimple to the point where the holes get too big? I'm so confused.

Thanks,

mulde35d 11-02-2019 06:08 PM

possibilities
 
Once dimpled, the holes do enlarge just slightly and sometimes if the cleco is installed from the side that bent inward (the inward side) it won't hold real well. Make sure the cleco comes from the outside skin towards the inside skin.

nilberg 11-02-2019 06:17 PM

Also, the clecos from different manufacturer are slightly different. I bought clecos in different places, they are all stored in the same place. Some of them lose their "shinyness" after a while others still look like new. The shiny ones grips a dimpled hole with no problem, not so much for the others.

wirejock 11-02-2019 06:39 PM

Clekos
 
Check the brand. Wedgelock clekos are best. The center pin is thicker. Clekolock will pop out of a dimpled hole.
Pretty hard to over dimple. Even with a C-frame, it takes two serious whacks to get a nice crisp dimple.

az_gila 11-02-2019 09:17 PM

Quote:

Originally Posted by wirejock (Post 1383805)
Check the brand. Wedgelock clekos are best. The center pin is thicker. Clekolock will pop out of a dimpled hole.
Pretty hard to over dimple. Even with a C-frame, it takes two serious whacks to get a nice crisp dimple.

But the 'fatter' center pin makes it harder to insert in the un-drilled undersized holes in a QB kit....

Larco 11-02-2019 09:50 PM

Quote:

Originally Posted by wirejock (Post 1383805)
Check the brand. Wedgelock clekos are best. The center pin is thicker. Clekolock will pop out of a dimpled hole.
Pretty hard to over dimple. Even with a C-frame, it takes two serious whacks to get a nice crisp dimple.

Wirejock nailed it again. I have a large can of unusable Clekolock cellos that I keep well out of reach! :-) They do work well if used when match drilling but if you mix them up they will drive you crazy

danielweberdlc 11-02-2019 10:27 PM

I ran a test where I used the C frame to dimple another hole and then used the same dimple dies in the pneumatic squeezer. The squeezer dimples and the ones from the C frame fell out.

It sure looks like I'm somehow over-dimpling and enlarging the holes. Guess I'll contact Cleaveland and ask them what I'm doing wrong.

I edited this post after I went back out and the squeezer cleco fell out :-(

mulde35d 11-03-2019 03:22 AM

Can?t over dimple
 
Quote:

Originally Posted by danielweberdlc (Post 1383842)
I ran a test where I used the C frame to dimple another hole and then used the same dimple dies in the pneumatic squeezer. The squeezer dimples and the ones from the C frame fell out.

It sure looks like I'm somehow over-dimpling and enlarging the holes. Guess I'll contact Cleaveland and ask them what I'm doing wrong.

I edited this post after I went back out and the squeezer cleco fell out :-(

Take it from the guy who physically bent the squeezer ram while dimpling, you can?t ?over dimple? a hole. You can bend the sheet metal if not aligned properly and you can easily under dimple the hole. But I am not sure that any of us have the leverage to over dimple the hole with this equipment.

I still think the most likely problem is the wrong size die, but since you said that was checked I didn?t go down that path

PaulvS 11-03-2019 06:39 AM

Hole size after dimpling?
 
Can you measure the size of the hole after it has been dimpled? Easiest way to do this is with a larger drill bit that just fits. That may give us a clue to help figure out where things are going wrong. Also, have you got a different 3/32 dimple die that you can try?

Hwood 11-03-2019 08:17 AM

Here?s a thought....(not that I have ever this!) ...but make sure you are using a #40 dimple and not a #30.... It happens and like I said...not that I have ever done that before, 😇


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