what is up fabrication nation welcome back for the third day in a row for
thinner of how many everybody days anyway got some total education for you
today no major fabrication if you were along for the ride yesterday work on the
battery box yesterday we built this battery box for the goose of bead roll some
aircraft rivets nothing too crazy one of the things that we did making that
battery box is we used a sheet metal break which basically does straight
bends so my question is what if you have to do a curved then a curved Bend well
if you need a curved Bend may not be a question you ask very often because some
people don't know it's possible but there is a way to make curved bends you
know if you need a flange that is curved on the same panel without cutting or
welding or whatever there's a way to do it and that's what I'm going to show you
today so when I say curved Bend this is what I mean
now you could take with a break and I could bend a straight piece right I
could Bend this flange up but what if the flange needs to be curved like this
line here there's a way to do this obviously you can't do it in the break
because the break would just come straight across here there is a way to
curve this and that's what I'm about to show you alright the way to do this it's
going to take two pieces of equipment and these are probably not your average
pieces of equipment not probably something most of you would having a
shop but I still want to show you these things and so you know that they're
possible and that maybe one day when you do invest in some of this kind of stuff
you understand what you can do with it this is a bead roller you've probably
seen this thing on how much times it will take this and the
shrinker stretcher because we're going to shrink some this metal now this is
the thing so we got the curve curved flange going this way on this panel this
curved flange can actually go the other way as well can be the same process here
the only difference is when it curves this way we're going to shrink some of
the metal pit curve this way we'd have to stretch some of the metal and you'll
see and understand here in just a minute so basically all you do on this
particular piece your top die is what they call a tipping die style die it's
basically this a sharp edge the bottom die is a flat soft die a lot of times we
use skateboard wheels that sort of thing this is the one I've got say rubber it's
really soft probably a little too soft for this
procedure but I think it'll work so this is do this think you want to do just
going to slide this thing in here line it up on your mark give it just a little
bit of tension and as you roll this thing through come on a lift up okay
you're just going to follow that line entire way you can already see it's
starting to bend a little bit I think you can see you can see it's starting to
bend just a little bit it's a slow process and take several passes the next
go-around you just give it a little bit more tension
as you can see we got a little a little bit more Bend on that one
a little bit more Bend now what you'll see is the panel itself they're starting
to curve this way and that's because this metal here is is basically you're
bending it and it has nowhere to go that's where the shrinker is going to
come in we're going to come back in here and shrink some of this and then it'll
allow us to keep bending it do one more pass then we'll go over the shrinker
alright let's take you to the shrinker we'll shrink some of this out what will
happen is when we shrink some of this out here this panel will get flat again
and then maybe we'll come back and make a couple more patches on this bad boy
all right this hole here is a shrinker stretcher being a Friday video on this
thing not too long ago and if you missed it basically all it does it has an upper
it has an upper and a lower die that clamp the metal and as it clamps it then
it squeezes it together okay and it just basically shrinks it through a process
of just going doing that over and over and over it also has another set of dies
that does just the opposite it'll grab it and stretch it so we can do both what
I'm doing - as I shrink this I'm kind of pushing on it a little bit just kind of
bend it at that edge
all right so you can see that I just come together shrinking it shrinking it
up and it's also making this panel flat again cells doing that
can see how that's working all right so once you get to this point there's a
couple things you can do it really didn't need another pass on the bead
roller you can come in here with a handheld planishing hammer or a body
hammer with a buck it's curved on the back so basically this lady's in there
like that and then you could just kind of pound it out right or come in here
with a pneumatic planishing hammer and just kind of really clean this whole
edge up now it's got some teeth marks in it's got a couple riffles in it I could
work it with this body hammer and get a lot of that out or if I had a pneumatic
platic planishing hammer I could really clean that up and it just looked like it
was never even massaged to begin with so there you go if you didn't know now you
know how to make bends and a curve bin in the same panel now you might ask what
would you use for this well there's all kinds of things you could do you know
fenders if you need like a fenders a piece that kind of wrapped around the
top of a tire on the inside and then you're going to tax your fender to it
you need to roll that in there cowl pieces Brie there's all kinds of
stuff you could basically use this technique to get the job done it's
trying to educate you on some of the equipment out there and the
possibilities in hopes that maybe I can inspire you at some point to get out
there and try some of this stuff yourself as always thank you for joining
me I'll see you guys some more this week go do work son