Shop Floor Talk  

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

SFT Search:   
Reply
 
Thread Tools Display Modes
  #11  
Old 05-15-2019, 11:26 AM
Shade Tree Welder's Avatar
Shade Tree Welder Shade Tree Welder is offline
Grumpy Bastard
 
Join Date: Jun 2004
Location: Kankakee County, IL
Posts: 19,711
Default

Quote:
Originally Posted by JBFab View Post
I made a couple of press brake calculators in Excel that I've been meaning to clean up and put in PDF form. I'll try to get that done soon and post it to the forum.

One is a tonnage calculator, and one is for calculating how to bump a radius.

Sent from my SM-N960U using ShopFloorTalk mobile app
That would be very useful!
__________________
Shade

"Prepare to defend yourselves."
-- Sergeant Major Basil L. Plumley, Ia Drang Valley
Reply With Quote
  #12  
Old 05-17-2019, 09:00 AM
Ironman's Avatar
Ironman Ironman is offline
Iron Modification Investigator
 
Join Date: Feb 2008
Location: Warburg, Alberta, Canada
Posts: 14,019
Default

Here's a spreadsheet for bumping a radius.
I've never found a downloadable calculator for press tonnage, this one is as good as any.
Attached Files
File Type: xlsx Press Brake Calculators-1.xlsx (187.3 KB, 33 views)
__________________
Gerry
You got freedom of speech, if you don't say too much.
Aaron Neville.

The virtue is always a cover for the sin. That's the key to understanding the modern left. Whatever they're accusing you of doing, they are doing themselves but more enthusiastically. And that's definitely the story of Justin Trudeau. Tucker Carlson
Reply With Quote
  #13  
Old 05-17-2019, 09:50 AM
digger doug's Avatar
digger doug digger doug is offline
Not to be used as a Flotation Device
 
Join Date: Jan 2008
Location: NW Pa
Posts: 11,882
Default

Kinda hard to use these calculators when your in a scrap yard looking at a piece of die, and wanting to know if it will work for you....
8x material thickness
&
1/4" plate takes 20 tons per foot
Reply With Quote
  #14  
Old 05-22-2019, 08:04 PM
Scratch Scratch is online now
Senior Member
 
Join Date: Feb 2007
Location: Hudson WI
Posts: 527
Default

Well, we went and ordered a kit. I have no mill so making one myself would have been more difficult, plus... I only paid 150 for it since I split it with my brother. Got it welded up a few days ago, then painted it and took a picture of it because everybody loves pics right!

I'm very happy with it so far. It seems to be very beefy, the instructions were clear, and it went together with no problems and very quickly. Should work great for what we need it for.
Attached Thumbnails
Click image for larger version

Name:	61102808_10218401099434070_7808833835046535168_n.jpg
Views:	104
Size:	66.1 KB
ID:	150853  
Reply With Quote
  #15  
Old 05-23-2019, 05:55 AM
toprecycler's Avatar
toprecycler toprecycler is offline
Elite Member
 
Join Date: Jan 2009
Location: Petoskey, Michigan
Posts: 4,162
Default




Sent from my iPhone using ShopFloorTalk
__________________
Brian

You don't know what you don't know.

"It's what you learn after you know it all that counts." John Wooden
Reply With Quote
  #16  
Old 07-09-2019, 09:29 PM
Scratch Scratch is online now
Senior Member
 
Join Date: Feb 2007
Location: Hudson WI
Posts: 527
Default

I still really like the Swag Off Road press brake, but I find myself needing to bend either thin gauge steel or smaller pieces of steel so I was thinking about ordering their Flat Top adjustable bottom V-die.

Then I remembered I have a CNC plasma cutting table and some extra 1/2" AR500 steel so I decided to make one instead.

If you don't know what a "Flat Top adjustable bottom V-die" is, here's the link:
http://www.swagoffroad.com/SWAG-20-T...Die-_p_94.html

I pretty much made a duplicate of that except my theory is "overkill is under-rated" so I beefed it up. I used AR500 steel, and used all 1/2" steel, instead of 1/2" and 3/8" steel that they used. I also added a support brace because I may have to bend Vibranium someday...

In the first pic you can see the parts I cut out. The part on the right is the main bottom plate and has a support brace that almost touches the bottom of the existing brakes V-die. The two parts in the middle make up the adjustable V-die. The two round pieces are spacers for the springs since it moves everything up a bit.

The second pic is getting ready to install the Flat Top in the brake.

The next two pics are of it installed, piece by piece.
Attached Thumbnails
Click image for larger version

Name:	0.jpg
Views:	54
Size:	154.0 KB
ID:	151449   Click image for larger version

Name:	1.jpg
Views:	56
Size:	104.5 KB
ID:	151450   Click image for larger version

Name:	2.jpg
Views:	54
Size:	99.2 KB
ID:	151451   Click image for larger version

Name:	3.jpg
Views:	57
Size:	101.5 KB
ID:	151452  

Last edited by Scratch; 07-09-2019 at 09:36 PM.
Reply With Quote
  #17  
Old 07-09-2019, 09:29 PM
Scratch Scratch is online now
Senior Member
 
Join Date: Feb 2007
Location: Hudson WI
Posts: 527
Default

The next pic is with the Flat Top all installed, and the fingers of the press brake put back on.

And the rest of them are as it sits in the press.

I can adjust the spacing of the Flat Top to whatever I need to and still get nice clean, small radius, crisp bends in up to 3/16" steel, but I'll be using the Flat Top more for smaller thinner pieces.

Next up... I think I need an air hydraulic jack... bad!
Attached Thumbnails
Click image for larger version

Name:	4.jpg
Views:	62
Size:	106.6 KB
ID:	151453   Click image for larger version

Name:	5.jpg
Views:	62
Size:	197.5 KB
ID:	151454   Click image for larger version

Name:	6.jpg
Views:	67
Size:	170.3 KB
ID:	151455   Click image for larger version

Name:	7.jpg
Views:	64
Size:	198.3 KB
ID:	151456  

Last edited by Scratch; 07-09-2019 at 09:37 PM.
Reply With Quote
  #18  
Old 07-09-2019, 09:54 PM
cutter's Avatar
cutter cutter is offline
Curmudgeon
 
Join Date: Jun 2004
Location: Lubbock,Texas
Posts: 33,028
Default

That looks "factory" to me, Scratch. Very nice.
__________________
cutter
Housekeeping Staff: the Gatekeeper
Director of Policy, Syntax and Grammar (by appointment)

"Dr. Chandran, will I dream?"

Just Keep Walking

"I am not a body, I am free.
For I am still as God created me."
Reply With Quote
  #19  
Old 07-09-2019, 10:24 PM
pepi's Avatar
pepi pepi is offline
Member
 
Join Date: Nov 2016
Location: Woodstock, GA
Posts: 188
Default

I agree and his parts look cleaner

Pep
__________________
*** KAG ***
Reply With Quote
  #20  
Old 07-10-2019, 08:56 AM
JBFab JBFab is offline
Elite Member
 
Join Date: Oct 2006
Location: NorthCentral Wisconsin
Posts: 1,259
Default

Here is the press brake tonnage calculator I made - I had to take off the calculator for bumping a radius - I don't have the conversion to PDF done yet. But I figures something is better than nothing.

I tried to post it in General Technical Information, but it appears you need special permission to do so.
Attached Files
File Type: pdf Press Brake TonnageCalculator.pdf (137.2 KB, 29 views)
__________________
I believe the appropriate metaphor here involves a river of excrement and a Native American water vessel without any means of propulsion.
Reply With Quote
Reply

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 07:17 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.