On Fri, 09 Nov 2007 19:11:39 -0600, Ignoramus12236
wrote:

In reference to my early post, about a HF crane that I wanted to
install, and having a 12x13", 5/8" thick plate.

I have procured another, similar size plate. If I weld them together,
I will get an approximately 13x24" plate, which I feel will be more or
less enough for the crane. I would place it to the right rear end of
the truck bed, and will use through bolts and angle for backing
underneath.

The question is how to weld them together, using stick welding. They
probably need to be beveled. I have two ways of doing it: 1) with a
Bridgeport mill and a 45 degree end mill, or with a Hypertherm
powermax and a special gouging consumable.

My own thinking is that the Bridgeport approach is more
straightforward and will give me a much more uniform bevel.

Any other ideas? How deep should I bevel? Would I need a root pass
with 6011, to weld over with 7018? This will be a relatively low
stress connection, just holding a HF crane, but I feel like doing it
more thoroughly leaves me with a little more room for error.


i

Since it's possible (and even easy in this case), I'd buttweld from
both sides. The advantage there is that such bending you get when
you weld one side will somewhat self- correct when you weld the other.
It will bend toward the weld a bit even if you clamp the crap out of
it.

On 2007-11-10, Don Foreman wrote:
On Fri, 09 Nov 2007 19:11:39 -0600, Ignoramus12236
wrote:

In reference to my early post, about a HF crane that I wanted to
install, and having a 12x13", 5/8" thick plate.

I have procured another, similar size plate. If I weld them together,
I will get an approximately 13x24" plate, which I feel will be more or
less enough for the crane. I would place it to the right rear end of
the truck bed, and will use through bolts and angle for backing
underneath.

The question is how to weld them together, using stick welding. They
probably need to be beveled. I have two ways of doing it: 1) with a
Bridgeport mill and a 45 degree end mill, or with a Hypertherm
powermax and a special gouging consumable.

My own thinking is that the Bridgeport approach is more
straightforward and will give me a much more uniform bevel.

Any other ideas? How deep should I bevel? Would I need a root pass
with 6011, to weld over with 7018? This will be a relatively low
stress connection, just holding a HF crane, but I feel like doing it
more thoroughly leaves me with a little more room for error.


i

Since it's possible (and even easy in this case), I'd buttweld from
both sides. The advantage there is that such bending you get when
you weld one side will somewhat self- correct when you weld the other.
It will bend toward the weld a bit even if you clamp the crap out of
it.

Yes, I definitely will weld on both sides, no question. First a little
bit on both sides, then more.

i