[TheForge] Forging a pipe flange...

Sun Jan 1 16:02:33 EST 2017

Well, let's start by assuming that those are Hecha 3-ton hydraulic diesel
forklifts.
Some pertinent dimensions of these machines:

   - Fork Length: 1070mm
   - Fork Width: 125mm
   - Overall Dimensions: 3817mmx1230mmx2085mm

At 4:45 min, we see the two forklifts opposite each other, almost
perpendicular to the camera, with the ram bottomed.

I measure the nearer fork on the left forklift as 45 mm on my screen.  I
measure the nearer fork on the right forklift as 62 mm on my screen.  Hence
the same fork at the same angle centered on the ram would be 53.5 mm in the
picture, whereas it's 1070 mm in life.  That's a scale of 20-fold.

The ram cylinder measures 26 mm in diameter and 70 mm high in the picture,
which translates to 520 mm or 20.5" in diameter by 1400 mm or 55" high.
That includes the striking face which is of smaller diameter, but I'm going
to ignore that because it excludes any contribution from the hydraulic
cylinder (?) cylinder above the ram, so my estimate will probably be low
anyway.

So the volume of the ram is (20.5 in/2)^2 * 55 in = 5778 cubic inches.

Steel is approx. 10 lb /36 cu.in., so that gives us 1605 lb.  Roughly 3/4
ton.  Add to that any contribution of the hydraulic cylinder piston, which
might be considerable.

BTW, Frosty, I'm very impressed that you use the plural form "fora".  I've
pretty much given up on anyone understanding that term.

So how does that compare with the pile driver the construction crew
recently used to sink pilings for the new hospital building near me?

Bruce
NJ

On Sun, Jan 1, 2017 at 3:33 PM, jerry Frost <akfrosty at mtaonline.net> wrote:

> This video has hit a couple fora and it'd darned entertaining. I bet the
> folk living in the buildings in the background are happy to have a place to
> live and just make a habit of not owning delicate stuff.
>
> The forklift operators are competent for sure or they wouldn't have the
> job.
> Forklifts are pretty easy to run, a little practice and you're inventing
> ways to do things as precisely as possible like slipping the forks into a
> pallet without touching the pallet or ground.
>
> I wish they'd shown the hammer driver, I'm betting a decent crane operator,
> lift the weight with a cable drum winch and drag the clutch JUST enough to
> keep the cable from bird's nesting on the drum. THAT is the more skilled
> operator's jobs on that drop hammer. I'll put money on it only being one of
> hundreds or maybe thousands of similar forging operations.
>
> What do you think that hammer's falling weight is?
>
> Frosty
>
> -----Original Message-----
> From: TheForge [mailto:theforge-bounces at mailman.qth.net] On Behalf Of
> Charles
> Sent: Saturday, December 31, 2016 3:13 AM
> To: mspencer at tallships.ca; Blacksmithing List Sponsored by ABANA
> Subject: Re: [TheForge] Forging a pipe flange...
>
> The team work and forklift operation are impressive.  You get the
> impression
> this is not the first one they have done.  Having worked a lot in China one
> thing that gets me is the extreme economy of motion being exhibited.  The
> extreme heat and weight must dictate that after a while.  Lot of trust
> between the guy operating the tip and the guy placing the drift/punch
> because you are not seeng much in the way of hand signals, but of course in
> this day and age, that beast could be operated by a hand control in one of
> their pockets. A really neat video, thanks for sharing.
>
> Charles
>
> > On Dec 29, 2016, at 5:01 PM, Mike Spencer <mspencer at tallships.ca> wrote:
> >
> >
> > ...in China.  (For the power hammer fans)
> >
> >   https://www.youtube.com/watch?v=r41dcYUvNLk
> >
> >
> > Looks like a DIY drop hammer.  You never get to see the mechanism or
> > the hammer driver.  But a nice piece of teamwork!
> >
> > - Mike
> >
> > --
> > Michael Spencer                  Nova Scotia, Canada       .~.
> >                                                           /V\
> > mspencer at tallships.ca                                     /( )\
> > http://home.tallships.ca/mspencer/                        ^^-^^
> >
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