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Pulled Rivets in Tight Places JOE NORRIS
PULLED RIVETS ARE FOUND on many of today’s homebuilts. Designs such as the Sonex, Sonerai, Zenith series, and others feature pulled rivets in their construction. Pulled rivets are used because they offer simple, one-person installation along with the low cost of required installation tools, saving both time and money for the builder. Sooner or later, the builder of a sheet metal aircraft using pulled rivets will run into a situation where there just isn’t room to get the rivet installation tool into the area where the rivet needs to be installed. An easy fix for this problem is to modify the tool. Joe Norris, EAA 113615, is EAA’s Homebuilders Community Manager.
The problem...
THE SOLUTION
1/ In this picture we have an “out of the
3/ For this process to work properly, bend
box” rivet tool on the left and our modified
the rivet mandrel to match the angle the
unit on the right. You can see how a grinder
tool is held at. One method is to use the
has been used to remove some material
extra tips stored in the tool’s handle. Pick
from the upper frame and the barrel of the
the tip that will accept the body of your
tool. Look closely at the tip (where the rivet
rivet and then bend as shown. Or you can
mandrel goes into the tool) and you’ll see
drill a proper size hole in a piece of scrap
that it has been ground at a slight angle.
metal or wood to hold the rivet while you bend the mandrel.
ORIGINAL
10 TO 20 DEGREES
2/ This picture illustrates the reason for
4/ The result is a properly set rivet, as
grinding the tip at an angle. You can see
shown here. There is an alternate method
that the tool can now be held at an angle
you can use. Rather than modifying your
to the work, but the tip will be flush so that
rivet tool, you can make a small angle block
the rivet will be set properly.
out of a scrap of aluminum or steel. Drill a hole in the block that will fit over the rivet mandrel and then grind an angle on one side of the block. Bend your rivet mandrel as described above, slip your angle block onto the mandrel, and then set your rivet.
Aug 26, 1971 - Application of heat or electricity to the rivet head activates the charge to detonate, thus expanding the rivet walls to set the blind end. Threaded: ...
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