On Monday, January 2, 2017 at 1:59:24 PM UTC-5, Paul K. Dickman wrote:
wrote in message
...
On Monday, January 2, 2017 at 11:33:56 AM UTC-5, Paul K. Dickman wrote:
wrote in message
...
On Sunday, January 1, 2017 at 5:41:03 PM UTC-5, Cydrome Leader wrote:
wrote:
On Saturday, December 31, 2016 at 8:13:12 PM UTC-5, Cydrome Leader
wrote:
Mike Spencer wrote:

Cydrome Leader writes:

There's no question they've made a huge flange of some sort, but
if
I
ordered 100 of them, would they vary at all? Would they even all
be
made
of the same type of steel etc. That's where I have questions
about
cottage
type industry.

Notice when they're doing the 2nd and 3rd round of forging the
flange.
When the hammer strikes, it brings (what passes for) the set
hammer --
the block of steel on a long stick -- down flush with the lip,
never
goes too far and crushes the lip.

We never see the hammer driver but I'd say he's hot stuff, lots of
practice. Note that it's apparently a drop hammer, no powered
stroke.
The hammer driver has to raise the tup just enough, reckoning on
the
remaining heat at any stage, to get the blow just right.

Cool stuff, great teamwork.

I think it was mentioned that's a flange for a 48" pipe. At 100
PSI
that's
90 tons of force trying to tear that thing apart. It has to be a
sound
part and not just "close enough". Forgings still need proper heat
treatment, and from that video maybe they just bury it in dirt..
It's
not
really clear.

Is there any reason to believe that the workpiece isn't just
mild --
low carbon -- steel? No special hear treating required if it's
not
burned for forged too cold. I have a piece of oil rig pipe here
that
is, I think, supposed to be good to 6,000 PSI, seems to be made of
kinda weird steel. 100 PSI is small potatoes.

That's sort of my point there. What if anything is being controlled
in
that operation? The forging looks hot in some parts of the video and
cool
on others. Didn't see any tempstick action, but it is an edited
video.

Skill of the team aside, it's still a real corny looking operation.