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Ron Lendon
Joined: 10 Jan 2006
Posts: 685
Location: Clinton Twp., MI
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 Posted: Wed Jun 25, 2008 5:13 pm Post subject: Problem Solving Ideas |
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Here is an idea that worked for me today. The problem was how to align pilot holes in an already drilled #21 rivet hole. I riveted my top skin and as I was doing it I remembered the wing locker. I had already drilled the skin and ribs for black clecoes and ended up skip riveting around the wing locker area.
Later I drilled out the skip (every other) rivets and had to place and clamp the dzus strips and get the pilot holes right in the center of the large hole. I made a bushing and used it to locate the pilot drill right in the center.
All I had to do is setup the lathe and machine a step with a .155" dia in a piece of .5" dia. steel rod about .5" long with a through hole of 3/32"dia. The step is only .025" (material thickness). I hold this flush and drill through the bushing and the hole comes right on the center of the larger hole.
Once the pilot hole is in I just opened them in the conventional manner.
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_________________
Ron Lendon
WW Corvair with Roy's Garage 5th bearing
CH 601 XLB
N601LT - Flying
http://www.mykitlog.com/rlendon
Corvair Engine Prints:
https://sites.google.com/site/corvairenginedata/ |
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ashontz
Joined: 27 Dec 2006
Posts: 723
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| Posted: Thu Jun 26, 2008 3:06 am Post subject: Re: Problem Solving Ideas |
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I like it Ron. More things I can now do with my lathe.
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kkinney
Joined: 11 Jan 2006
Posts: 42
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| Posted: Fri Jun 27, 2008 6:21 am Post subject: Re: Problem Solving Ideas |
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That's a good idea, I like it. Although I don't have a lathe or lathe experience, I wonder if it would work in reverse?
For example, drilling out rivets. Most often it's simple except when the mandrel is broken off higher than normal. Now when you try to remove it, the bit bounces off the mandrel and uglifies the hole.
How hard would it be to make a bushing that fits over an A4/A5 rivet head? If you got fancy, could put both on one bushing by using the other end.
Just a thought,
kk
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Ron Lendon
Joined: 10 Jan 2006
Posts: 685
Location: Clinton Twp., MI
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| Posted: Sat Jun 28, 2008 8:04 pm Post subject: Re: Problem Solving Ideas |
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You might try this method for removing rivets.
What I do before removing the rivet head is use a rivet stem, ( have a lot of them) and tap it down into the center to push the stem away from the head. Sometimes it pushes right through. Grind flat the ends of the pull off stem and just hold it in the center of the rivet head and tap on it with a small hammer. Once the center stem is below the sheet metal surface, so the drill tip won't touch it, it is safe to drill. I only drill till the head comes free, then I use a drift or pliers on the back side to take the rest of the rivet out of the hole. I have had some luck also just using my automatic center punch and a backing block with hole to knock them out once the head is removed.
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_________________
Ron Lendon
WW Corvair with Roy's Garage 5th bearing
CH 601 XLB
N601LT - Flying
http://www.mykitlog.com/rlendon
Corvair Engine Prints:
https://sites.google.com/site/corvairenginedata/ |
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sky_ranger161
Joined: 07 Jun 2006
Posts: 91
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| Posted: Thu Jul 03, 2008 3:31 pm Post subject: Problem Solving Ideas |
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Great idea Ron. That's what I love about this sport - people being smarter than the problems they solve. Thanks for sharing it.
Debo Cox
Nags Head, NC
www.mykitlog.com/debo
do not archive
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Ron Lendon
Joined: 10 Jan 2006
Posts: 685
Location: Clinton Twp., MI
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