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0t----punch morphing

JHOLLAND1

Titanium
Joined
Oct 8, 2005
Location
western washington state
a current project--33ton Di-Acro turret punch undergoing complete part out
to be followed by conversion to 100 ton combination press/single punch/die
capability

plate frame thickness is 1-3/8 with 36 in throat---estimate of 100 ton endurance is
pure conjecture but reasonable based upon 6000 lb frame geometry

final pic is anvil insert which supports lower turret and sustains all 33 ton impact loading--
100 ton anvil version will be much beefier with greater load bearing surface area--plans
still in my head :)
 

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illustrated is 2.5 inch shaft- flywheel -clutch extracted from 36 VT Di-Acro frame
missing is outboard clutch pack

components rest upon punch work piece x-y table ball screw operated--
modifications will allow multipurpose function including sawing, plasma, routing -engraving

more on this later
 

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JHOLLAND1, I've been meaning to ask for some time. Where do you get these goodies you repurpose (monster boneyard of everything Lewis-McChord got rid of after Korea, maybe?), and where do you get the time???

Curious and envious...
 
I think the 100 tonnes is a bit optimistic from that frame if you keep the punch location the same as in the original, the issue is the "thickness" of the back, there is a positive force multiplication going on in the original design, might be possible to avoid it if you move the new punching location deeper in (yellow line)

I'd set up a hydraulic jack in the original punch location and check deflection with the increased force first before going any further, I don't think they use safety factor of 3+ when they designed the original...

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JHOLLAND1, I've been meaning to ask for some time. Where do you get these goodies you repurpose (monster boneyard of everything Lewis-McChord got rid of after Korea, maybe?), and where do you get the time???

Curious and envious...

Stu
10 years ago I evaluated this turret punch for conversion to pc control--it was tape nc operated
complexity of retrofit was more than I was willing to tackle

one month ago shop owner calls with message entire unit is mine if I would haul away--he replaced the Di-Acro with 50 hp Flow water jet

for past 40 years I have functioned on 4 hours daily sleep--a pattern necessitated by continous emergency call covering
3 hospitals
on a good day I get more done with 4 extra hours--a bad day and I'm an inefficient zombie :(
 
I think the 100 tonnes is a bit optimistic from that frame if you keep the punch location the same as in the original, the issue is the "thickness" of the back, there is a positive force multiplication going on in the original design, might be possible to avoid it if you move the new punching location deeper in (yellow line)

I concur. A press brake with the same thickness side plates, half the throat, and twice as much back 'thickness' is only going to be rated at 60-70 tons.
 
What's the purpose of increasing the tonnage?

I've been around 30 ton Amada turret punches (30,000 pounds of press) a lot and they shake the building running at 30 tons punching washers from 1/4" plate. Like a 50 cal machine gun all day.

Big tonnage for forming is a must, but in a punch I want speed. The last job on earth I'd want to do is some kind of punching job that requires 100 tons. But on a turret punch??? I'd like about 30 tons, lightening speed, atleast 2 indexing stations and a press frame and guides built for near zero deflection.

80's Amada thick turrets pop up for sale once or twice a year with tooling around $5000. Seen several thin turrets free for the taking. Those are all machines that print money if you can house and feed them.
 
Tie rods?

turrets removed--straight shaft suspension--no taper

comments regarding maximal working tonnage either as a press or punch are appreciated
agree that 100 ton loading as configured is optimistic-with consequence of permanent frame
twist--

plan is to test load working aperture with indicator checking dynamic frame deflection

so tie rods may be a consideration if frame movement is documented

side tie rods illustrated in pics

another option is tie rod coaxially spanning upper and lower turret housings
this approach will reduce throat depth to 8 inches but allow tie rod diameter up to 4 inch--


weird project but one with versatile promise:)
 

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