Pullmax build.

[dodgedifferent2]

So I have been tinkering around with many things and got my brain into overdrive.

I built my powered bead roller.


Also made some lower anvils for an english wheel.

Now the brain went to places no brain should ever go.
I decided I needed a challenge. So I been looking up pullmax nibblers.
Now I found this to graze.

So I pulled up my trusty solidworks program and reinstalled it on my computer.
Now i am drawing it up the toggle linkage so I can machine this up.

I am hoping to build it solid enough to bend 3/8 plate when needed but still be able to shrink panels and learn many things [smilie=2:
I will be making custom dies later on.

This has also got my head going insane and thinking I can build my own hydraulic shears. :doh:

I will try to keep a progress report as I move along

 

[69.5CUDA]

with my upcoming build....keep this stuff posted......im looking currently into building an englishwheel so these other toys your building are right up my alley of building them but also using them....well short of mill/lathe work id need to farm that shit out..my mini china mill isnt good for anything but aluminum and plastic

 

[Dr.Jass]

A Pullmax? Now that's a hell of a project! I can certainly see why you'd like to attempt it, with what even used ones bring. And to paraphrase my good friend Kev, "Anything that can be built, can be [copied]" (his phrase is ends with "rebuilt"). :dance: I just wonder about the range capacity for which you're shooting. It seems--and I may be wrong--that Pullmax machines usually have upper and lower limits to their ranges; i.e., one that can do 1/4" steel has a lower limit of 1/8". At a guess, my thought is that it's got more to do with HP than range of motion--as in, something with enough cojones to work 1/4" would mangle 16 gauge pretty quickly. Tractor-pulling engines ain't worth a damn on the farm, so to speak. I would think that's an issue one would want to tackle on the electrical side of things, though... but then we get into discussions of induction v. universal motors, etc.

 

[dodgedifferent2]

I do have a 10 hp 220v single phase motor kicking around that likely needs a rebuild.

The top shaft can be adjusted to give more/less movement with an eccentric..

Also the rear shaft has adjustment holes to give more of an offset for an eccentric.

From all my digging it seems most pullmax nibblers have horsepower in the 2 hp range on 550 3 phase power.

 

[Dr.Jass]

Well, there's the "startup" v. "running" horsepower ratings to consider (it may technically be consumptive, i.e. based on electrical draw @ startup v. actual shaft HP). The Compressor of Hate--my old oilless Craftsman--was rated at 3.5HP with a motor roughly the size of one for a Mopar 3-speed wiper motor, but it was a flattened cylinder. My C-Aire, on the other hand, is rated 1.7HP. It's ~7" in diameter and nearly a foot long. The C-Aire pump has about four times the displacement. Its SCFM number at 90PSI is approximately double that of the CoH at 50PSI. Obviously, they were not rated on the same scale.

10HP (shaft) seems like absolute overkill. Ability to bend plate is one thing, but using brute force on sheetmetal generally ends rather badly.

 

[dodgedifferent2]

Machining has begun.
Bearings waiting for assembly.
First eccentric made.
Cutting a rad on pieces.
Been working on these parts in my free time.

 

[dodgedifferent2]

Here is where we are at now.
Have the internals mainly complete.
Now is to build the lower hammer portion. Drive mechanisms and the adjuster

 

[71ChargerRT]

That's really cool!