Shop Floor Talk  

Go Back   Shop Floor Talk > Welding and Metalworking Forums > Fabrication

JR Welding Tools
SFT Search:   
Thread Tools Display Modes
Old 01-24-2011, 11:51 PM
arizonian's Avatar
arizonian arizonian is offline
Elite Member
Join Date: Jul 2007
Location: Tucson, Arizona
Posts: 1,052

I wasn't really thinking when I posted earlier. It would help if you had a sketch of your build or line of thought.

Length of travel and direction of motion are key to understanding how to lay out the arms in relation to the cylinder(s) and the punch and die frame setup. You essentially trade decreased motion on one end for an increase in force, like a lever. How do you get plan to get a vertical or near linear motion?

Bill in sunny Tucson

I believe in gun control.

Gun Control: The ability to consistently hit what you are aiming at.

Weldor by choice, engineer by necessity.
Reply With Quote
Old 01-25-2011, 01:45 AM
Barn Owl's Avatar
Barn Owl Barn Owl is offline
Senior Member
Join Date: Jun 2009
Location: San Diego California
Posts: 914

Yeah I should draw something up, mostly what I am going to build is the Scotchman version because that is what I have available to measure and scale.
I know that the cutting side of the arm will not be 1 foot away from the pivot point so I am not thinking that I will need a 4 foot arm. But stil many hours of designing

"Yes, we did produce a near perfect Republic. But will they keep it? Or will they in their enjoyment of plenty, lose the memory of freedom? Material abundance without character is the surest way to destruction. Indeed, I tremble for my country when I reflect that God is just."

Thomas Jefferson

If you spent 1 million dollars every day from the time Christ walked the earth until now, you still would not have spent 1 trillion dollars!
Reply With Quote
Old 01-26-2011, 05:06 PM
mike van mike van is offline
Join Date: Jan 2011
Location: Kent Ct
Posts: 6

Here's a picture of my Uni-Hydro 56/14 as I was bringing it home a feww years ago. All the pivot points are bushed as someone said. A true joy to own & operate.
Attached Thumbnails
Click image for larger version

Name:	5614two-1.jpg
Views:	293
Size:	43.4 KB
ID:	71039  

Last edited by cutter; 01-26-2011 at 06:39 PM.
Reply With Quote
Old 01-26-2011, 05:32 PM
Pat's Avatar
Pat Pat is offline
Elite Member
Join Date: Jun 2004
Location: Northern Wisconsin
Posts: 1,789

Mike Van,

First off welcome to this little part of the world. I really like your slug tray and drop off system. You stated the photo was of when you brought the 56/14 home, so I assume it was on there already. I may make something similar for my 42/14. How do you like the Uni-Hydro?

Last edited by Pat; 01-26-2011 at 05:33 PM. Reason: Goofed
Reply With Quote
Old 01-26-2011, 06:17 PM
mike van mike van is offline
Join Date: Jan 2011
Location: Kent Ct
Posts: 6

Hi Pat - I bought the machine used, barely used. The previous owner had made the chute & catcher, it does work good. The machine itself is just something to behold when it's being used, people watch in awe as it punches a 3/4 hole in a second. Sure beats the pilot hole, oil can, finished size, oil can, clean up the mess. I don't use it a lot, or haven't yet - but there's a few things yet I need to build at the sawmill, so it should get the dust wiped off it from time to time. As far as building one of these, build heavy is all I can say. Hydraulic pressure never ceases to amaze me.
Reply With Quote
Old 01-26-2011, 06:42 PM
cutter's Avatar
cutter cutter is offline
Join Date: Jun 2004
Location: Lubbock,Texas
Posts: 31,839

Welcome aboard, mike van.

Please check out the first item in our FAQ.
Housekeeping Staff: the Gatekeeper
Director of Policy, Syntax and Grammar (by appointment)

"Dr. Chandran, will I dream?"

I want to go home!
Oh! Come to think of it, I am home.
Reply With Quote
Old 01-26-2011, 06:53 PM
Posts: n/a

arn Owl
Which model Scotchman are you going to copy. Several different styles available.

Reply With Quote
Old 01-27-2011, 04:32 AM
midmosandblasting's Avatar
midmosandblasting midmosandblasting is online now
Blast this!
Join Date: Oct 2005
Location: Calhoun ,Mo
Posts: 7,390

Welcome Mike Van. Our way of doing pictures is covered in FAQ. The new software will resize a lot of them so the 100K can go up a bit.
Be sure to check out these special sections of our site that you might not be aware of:

1. 2.Product/Equipment Review Index

3.. Website Equipment, Supplier and OEM Index

4. Index[/URL]

5. Tricks and Tips

We look forward to adding your projects, tips or product reviews to these indexes in the near future.
Reply With Quote
Old 01-27-2011, 06:11 AM
mike van mike van is offline
Join Date: Jan 2011
Location: Kent Ct
Posts: 6

Thanks for all the tips - Mike
Reply With Quote
Old 01-27-2011, 10:26 AM
Ironman's Avatar
Ironman Ironman is offline
Iron Modification Investigator
Join Date: Feb 2008
Location: Warburg, Alberta, Canada
Posts: 11,579

Mike, welcome to the site, and Barn Owl here's another thought.
I have a 21 ton mechanical ironworker. It uses a crank and pitman arm to multiply torque and tonnage. You get 21 tons pressure out of a 1 hp motor linked mechanically. It may be worth thinking about.
You could have a hydraulic cylinder on a bellcrank arm with a second mounting hole close to the pivot shaft. On this you would have a connecting rod to the shear plate. You only need about 1/2 inch of movement on the shear plate so it could be setup so the connecting rod to the bellcrank is almost over centre as the shear closes.
At the 20 degrees and less point before top dead centre, the leverage is immense.
Attached Thumbnails
Click image for larger version

Name:	ironworker .jpg
Views:	203
Size:	90.0 KB
ID:	71112  
“After all, no one is stupid enough to prefer war to peace; in peace sons bury their fathers, and in war fathers bury their sons.”

Even duct tape can't fix stupid ... But it can muffle the sound. Attributed to Red Green
Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Web Search:

All times are GMT -5. The time now is 12:00 PM.

Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2017, vBulletin Solutions, Inc.