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emrath(at)comcast.net
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 Posted: Sun Jan 20, 2008 12:51 pm Post subject: Rivit hardening |
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Year's ago on this list there was discuss about building your own spars. A
friend of mine did this, I helped. He used an arbor press (Harbor freight
part no. ITEM 3552-4VGA, now on sale for $32). One of use applied pressure
on the press while the other smacked the upright with a 2.5# sledge a couple
of times. Set a -6 rivet in two to three blows perfect each time. No bend
overs.
Marty in Brentwood TN
Time: 04:46:41 AM PST US
From: "glen matejcek" <aerobubba(at)earthlink.net>
Subject: rivet hardening
HI guys and gals-
This is not absolutely purely RV related, so purists please delete now!
I was talking to a friend a while back about riveting. He is building one
of Monett's products, which is built almost exclusively with pulled rivets.
The only solid rivets are the big ones in the spar center section. What my
friend learned at a Monett factory seminar is to put the factory head in a
rivet set on an anvil and smack the shop end with a hammer. I believe they
were to use some sort of a striking bar or block to transfer the blow, but I
don't recall that detail perfectly at this point. Anyway, what my friend
was told at this seminar is that one of the various reasons for doing this
is that this technique will properly set the rivet in fewer blows than using
a rivet gun, and that this in turn would lessen the work hardening of the
rivet.
This is not an intuitive conclusion for me, and I was wondering what the
metallurgists / professional metal workers / other smart folks out there
think?
As a morsel for those purists who haven't already deleted, if this is a
valid point, perhaps we could make ever so slightly tougher structures by
using higher gun pressures while riveting.
Thoughts?
BTW, I ZnCrO3 most things, glued my canopy, have a constant speed, IFR
panel, and the little wheel is in the back... 
glen matejcek
aerobubba(at)earthlink.net
Marty ҿӬ
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rhdudley1(at)bellsouth.ne
Guest
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| Posted: Sun Jan 20, 2008 1:34 pm Post subject: Rivit hardening |
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Back in about 2000 or 2001 when I built my RV-6A spar, Van rented a
pneumatic squeezer for the large rivets. When properly set up, it set
those rivet s perfectly with little effort. They were exactly repeatable.
I looked at Van's website and could not find any mention of that
squeezer. It was sent from user to user because of its heavy use rather
than returning to Van's after each use. If you can find a source now
that rents them it is a super way to set those spar rivets.
I've attached a couple of pictures of the squeezer in use.
Richard Dudley
RV-6A flying
Emrath wrote:
| Quote: |
Year's ago on this list there was discuss about building your own spars. A
friend of mine did this, I helped. He used an arbor press (Harbor freight
part no. ITEM 3552-4VGA, now on sale for $32). One of use applied pressure
on the press while the other smacked the upright with a 2.5# sledge a couple
of times. Set a -6 rivet in two to three blows perfect each time. No bend
overs.
Marty in Brentwood TN
Time: 04:46:41 AM PST US
From: "glen matejcek" <aerobubba(at)earthlink.net>
Subject: rivet hardening
HI guys and gals-
This is not absolutely purely RV related, so purists please delete now!
I was talking to a friend a while back about riveting. He is building one
of Monett's products, which is built almost exclusively with pulled rivets.
The only solid rivets are the big ones in the spar center section. What my
friend learned at a Monett factory seminar is to put the factory head in a
rivet set on an anvil and smack the shop end with a hammer. I believe they
were to use some sort of a striking bar or block to transfer the blow, but I
don't recall that detail perfectly at this point. Anyway, what my friend
was told at this seminar is that one of the various reasons for doing this
is that this technique will properly set the rivet in fewer blows than using
a rivet gun, and that this in turn would lessen the work hardening of the
rivet.
This is not an intuitive conclusion for me, and I was wondering what the
metallurgists / professional metal workers / other smart folks out there
think?
As a morsel for those purists who haven't already deleted, if this is a
valid point, perhaps we could make ever so slightly tougher structures by
using higher gun pressures while riveting.
Thoughts?
BTW, I ZnCrO3 most things, glued my canopy, have a constant speed, IFR
panel, and the little wheel is in the back...
glen matejcek
aerobubba(at)earthlink.net
Marty ҿӬ
|
| | - The Matronics RV-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV-List |
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