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bill.pagan(at)yahoo.com
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 Posted: Thu Jan 21, 2010 7:05 am Post subject: Upgrade Kit Rivet Removal |
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[img]cid:1264086095309(at)dclient.mail.yahoo.com[/img]
Hey all,
Need some advice on rivet removal. On the spar solid rivets, I've drilled the heads of the rivets and used a chisel to pop the heads off (just like in the videos). I center drilled a relief hole 3/4 or so through the rivet and the 9 rivets outboard of rib #6 came out pretty easily when I used my 3x rivet gun to drive them out. However, the rivets inboard of rib #6 where the spar cap doubles up I can't get the rivets to budge. I'm using a 3x rivet gun at about 100psi. I actually bent the punch I'm using in the rivet gun. Any advice is greatly appreciated. I'm really good at busting stuff and want to be especially careful here.
Bill Pagan
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clmelenyzeriv(at)cs.com
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| Posted: Thu Jan 21, 2010 7:40 am Post subject: Upgrade Kit Rivet Removal |
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Bill,
I have not started taking my wings apart yet, but I did my center spar. An EAA friend suggested using a roller chain breaker. I bought one at Harbor Freight for $10 tax included. I started just as you did by drilling off the factory head and flushing the rivet stem to the flat bar stock. I then removed the bottom receiver from the chain breaker, put the chain breaker over the bar with the drive pin centered on the factory head side, and turned the pin driver with a ratchet wrench easily pushing the rivet through the chain breaker's receiving end.
In anticipating working on the wing spars I ground out about 2 millimeters of the chain breaker throat because it needs to be deeper to span the 2 flat bars and web. I anticipate that I will have to trim the flange off of the angle and work from the fuselage end to the tip.
It worked well without hammering. Just be careful to center the drive pin on the rivet. I have ground the pin diameter down a little so that centering does not have to be exact.
I can be reached at 423-667-3635 if I have not explained this clearly.
C. L. Melenyzer IV
601XL wings completed and working on 650XL fuselage while waiting on upgrade kit.
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DaveG601XL
Joined: 27 Oct 2006
Posts: 351
Location: Cincinnati, Oh
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| Posted: Thu Jan 21, 2010 8:18 am Post subject: Re: Upgrade Kit Rivet Removal |
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Bill,
Make sure you clamp tightly on each side of the rivet you are trying to remove. The multiple layers of aluminum, if allowed to separate, will grip the rivet firmly.
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David Gallagher
Cincinnati, OH area |
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mhubel
Joined: 05 Sep 2009
Posts: 141
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| Posted: Thu Jan 21, 2010 1:24 pm Post subject: Re: Upgrade Kit Rivet Removal |
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The chain breaker may work but one needs to relief the pressure of the rivet.
I drilled the -6 rivets out with a #20 (1/8 inch) drill almost all the way through. I found that one has to at least have the drill tip go up to the "shop head". I then used a 1/8 punch with a 2X air hammer set at a low pressure.
The few times the shop head came off, I was able to drive the whole remaining rivet body out with a 3/16 punch.
Keeping all the pieces tight while doing this also helps and reduces the strain on any one piece of metal.
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_________________
Mark Hubelbank
N708HU
CH601XL
Jabiru 3300
Rotec TBI 40-3 carb
Sensenich ground adj prop.
240 hr TAF
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Ron Lendon
Joined: 10 Jan 2006
Posts: 685
Location: Clinton Twp., MI
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| Posted: Thu Jan 21, 2010 8:43 pm Post subject: Re: Upgrade Kit Rivet Removal |
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| bill.pagan(at)yahoo.com wrote: | [img]cid:1264086095309(at)dclient.mail.yahoo.com[/img]
Hey all,
�
Need some advice on rivet removal. On the spar solid rivets, I've drilled the heads of the rivets and used a chisel to pop the heads off (just like in the videos).� I center drilled a relief hole 3/4 or so through the rivet and the 9 rivets outboard of rib #6 came out pretty easily when I used my 3x rivet gun to drive them out. However, the rivets inboard of rib #6 where the spar cap doubles up I can't get the rivets to budge. I'm using a 3x rivet gun at about 100psi. I actually bent the punch I'm using in the rivet gun. Any advice is greatly appreciated. I'm really good at busting stuff and want to be especially careful here.
Bill Pagan |
Bill,
What worked best for me was the Navy method. Center punch factory head, Pilot drill 3/32 and keep it centered, #30 drill using tool to hold drill perpendicular and control depth, Chisel off the head, use 1/8 pin punch and have helper hold bucking bar flat next to the shop head and using hammer tap it out.
The top picture at this link shows the tool and depth used.
http://mykitlog.com/users/display_log.php?user=rlendon&project=780&category=0&log=94961&row=14
Here is a link that gave me some ideas:
http://wiki.matronics.com/wiki/index.php/Removing_Solid_Rivets
Hope that helps,
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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:
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clmelenyzeriv(at)cs.com
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| Posted: Fri Jan 22, 2010 6:44 am Post subject: Upgrade Kit Rivet Removal |
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Mark,
The chain breaker acts much like a C clamp by holding both surfaces together. I found no need to drill more deeply than it takes to remove the factory head.
C. L.
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afterfxllc(at)aol.com
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| Posted: Fri Jan 22, 2010 7:02 am Post subject: Upgrade Kit Rivet Removal |
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Bill,
Make sure you clamp the spar cap together as you try and remove the rivets. If not the caps will separate and lock the rivet as you try and remove it.
Jeff
[quote][b]
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601RX
Joined: 28 Oct 2009
Posts: 8
Location: AL
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| Posted: Fri Jan 22, 2010 4:55 pm Post subject: Re: Upgrade Kit Rivet Removal |
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Remove the nose skin.
Remove the rivet head.
Drill a 3/32 pilot head about 2/3 way through.
Drill it out to 1/8.
Stand the wing up on it's nose on 2 sawhorses.
Cut a 2X4 that will reach from the floor up to the bottom of the spar.
Drill a 3/8" hole in the end of the 2X4 a couple of inches deep.
Place the 2X4 with the hole over the head of the rivet you wish to remove.
It will now drive out easily with a 1/8 punch and hammer.
This worked really well for me. The hammer blows go down through the 2X4 and not out into the wing. It is also a one person job this way.
Mike
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Find dispensary
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