From time to time, I've wondered about
riviting whenever I come across a
piece of computer cabinet metal that has rivits
that have come loose or
fallen out. The current case in point is the tilt latch on an 11/44 when
it's in the 11X44-CA configuration (it's in the top of the rack, and tilts
up on gas pistons). There is a little latch on the side (best way I can
describe it is a metal rectangle cut on a diagonal) which is spring metal.
You pull this latch in from the front with a pen or screwdriver, and it then
clears the tab on the outer rack so it can tilt up. At the very back of this
spring metal latch is a rivet holding it in place. This rivit has come
loose. You can really only get to one side of it, that's when the cpu
chassis is tilted up. I believe that in other (more common) rackmount
configurations of the /44 when it's on slides that telescope out the front,
this same latch is present but it's used to allow the cpu to slide forward
rather than tilt up.
I've seen riviters working on F18's at Boeing, and it sure appears to be a
higher art form. Not sure it's something I could do, but thought I'd ask
here. I've seen all kinds of rivits - different sizes - on an H960 I believe
there are a couple? Anyways, what tools are required, where can one get
rivits, what different types are there, and is it something a neophyte like
me who has never done a rivit before can do? I'm looking for the basic intro
to replacing a rivit for someone who has never done it.
Firstly, let me say that I don't normally use rivets. As yuo know by now,
I like to take things apart, and I'd rather not have to drill out rivets.
But they can be useful in some situations, and in fact in some cases a
riveting-like process is the onlt way to fix something.
Riveting covers several different, but closely related, processes, actually.
The traditional 'rivet' was a metal cylinder with head on one end, a bit
like a blunt-ended nail. You put it through holes in the parts to be
joind and used a hammer for form a head on the other end, aided with a
tool normally called a 'snap' or a 'rivet set'. To use this type, you
need access to both sides of the work.
When you only have acess to osne side of the work, you use something
called a 'blind rivet' or a 'pop rivet'. The rivit hs hollow, and had a
metal pin running through it. Yput it into a special tool (normally
called a 'pop riveter', available from good car part and DIY shops), it
grips the pin. You now put the body of the rivet through the holes in the
work and squeeze the handles of the tool. This pulls the pin back through
the rivet, and the end of the pin then forms the other head on the rivet
body. The pin then brrsks off (making the 'pop' that gives the process
one of its names). This process is very easy if you have a good rivet
tool, and is probably what you want to do.
Finally, there are times when a pin or spindle is fastended to a nother
part (plate, gear, etc) by forming over the end in much the same way as
riveting. If you want to do this, you really need what's called a
'staking set' which will guide a punch tool perpendicular to the work and
so on. A good watchmakers staking set will cost a few hundered pounds
(!), I was lucky enough to find a second-hand one with a frw of the
punches missing for about a tenth of the new price. Yes, I grabbed it.
It's very useful for camera and clock repair, and of course extra punches
and diss can be made from tool steel on a lathe.
For your problem, if you _can_ cat to both sides, you might be able to
support one side and reform the head on the other side using a hammer and
a suitable puch/set tool. If not, you need to drill out the old rivet
(take care, some rivets are suprisingly hard metal) and replace it with a
new blind rivet. These come in various materials, of varying strengths.
The common ones seem to be a light aluminium alloy, fine for fixing trim
and the like, bot sot much good for anything else.
-tony