[TheForge] Press Update

[Chuck Robinson]

The press design is what I call a window sash "H"design. The anvil 
section is adjustable height by moving it up or down  when the pin 
locations are changed in the outside vertical columns ( I have a jib 
crane to lift  the press on the columns).
During forging operations the anvil is stationary. as the ram extends 
the, top die is moved down to the bottom die.

The main advantages of this design are:
The vertical height of the press is smaller than the standard "H" press 
and you don't have to bend over the control your work.
The sash vertical steel columns  and adjustable bearing blocks, absorb 
all side loading, not the ram. (the cylinder is articulated on both ends)
When the piston is at maximum extension the side loading from the dies 
is zip, unlike conventional presses.
The rising heat from the hot billets doesn't heat up the cylinder or 
hydraulic hoses, and the cylinder ports and seals are not inches away 
from your head.
The solenoid foot controls permit using both hands to maneuver  large 
billets, and have several less hoses  and potential leak points near 
your body
The 7" bore cylinder has an 11" stroke, but I built in an extra 8" 
clearance to allow space for large hammer head drifts to be used.( The 
top die has a 2" square hole  to hold the top dies, or allow the 
drifts,t to pass through.
When pressing thinner stock stack-able square sow blocks are locked into 
the bottom die.

The power pack compensated piston pump has an adjustable spring loaded 
swash plate that allows a quick adjustment of the pump pressure from a 
few hundred PSI to over 3000 PSI,
  so you can adjust for delicate work or really hogging down on large 
hot billets.

The material was what I could find in scrap yards and auctions.

  The vertical press sections and bearings were made from 1 3/4" X 4" 
solid rectangular stock.
  I used  Oak tag cardboard shim stock to provide clearance when welding 
the frame.
The horizontal sections were made from 1" X 6" plate. Full bead welds 
with 7018 rod.

I dug out a small trench under the press to allow clearance for the 
bottom cross members when forging thin stock.

A mechanical engineer did a stress analysis on the design and gave  it 
his blessing.
Chuck







On 3/23/2011 11:34 AM, James Binnion wrote:
> Hi Chuck,
> Could you explain a little bit about the features and construction of your press.
>
> Jim
>
> On Mar 23, 2011, at 9:18 AM, Chuck Robinson wrote:
>
>> Hey Mark,
>> This is  my press design. It evolved over many years, and answers most
>> of the deficiencies found in many presses used for hot work:
>> http://gulfcoastblacksmith.com/gallery2/member-work-samples/chuck-robinsons-work/dsc_0017-2/
>>
>> The power pack is separate to minimize leak danger and noise levels.
>> It used a compensated piston pump.
>> Chuck
>>
>> On 3/23/2011 9:36 AM, Mark A. Pesetsky wrote:
>>> So I stopped by and had a look at the press that my welder has for sale and it turns out that it is a 40 Ton Ironworker. I didn't get to snap off any pics because it was raining and cold. He tells me that he used it this past summer. It is in need of some TLC, but the motor/tank/lines are all encased on the back side of the unit. It looks like the lines will need to be replaced, but that isn't a big deal. The major concern I have now is getting it delivered and I need to know what size pad I should pour if I can't fit it in my garage. I am going to go back when the weather is better and get some pics/measurements. I'll keep you all informed.
>>>
>>> Thanks again for all of the input on the 100 ton that I was/might still be entertaining building. I think if my partner wants to buy me out on the ENERPAC stuff I'll let him build the 100 ton.
>>>
>>> Thanks Guys
>>> Mark
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> James Binnion
> jbin at well.com
>
>
>
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