Press brake for a 20 ton hydraulic press

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DMIOM:

--- Quote from: greenie on August 21, 2014, 12:14:13 AM ---Here's a suggestion, with the base plate, drill a couple of holes in it, where the two bits of angle iron touch, so that you can get a weld onto those two inside edges. 20 ton and a couple of 6mm bits of angle iron will be a "no contest" and the angle iron will spread in the middle, without something holding it in place.

Just a suggestion only, use it wisely or not, choice is yours.

regards greenie :loco:

--- End quote ---

and, in a similar vein, not just as a 'liner' but also as an anti-spread mechanism ....

Take a third length of the angle and drop it into the V of the current two angles and you can weld along the top edges as the original design did with their M.

Also, if you plug-weld like greenie suggested, you could consider going deeper and maybe even reach the bottom of the new V

Dave

GordonL:
Too late now but the included angle in the bottom die should be less than 90° to compensate for spring back. With heavy duty press brakes they can get away with 90° because they are actually coining the part. When you are operating at near capacity of the brake you have to allow for spring back. I always bought 85° bottom dies when I owned my fabricating shop.

DaveH:
Sorry guys, it is not clear from the photo's the two outer edges of the angle iron are welded all the way along to the base plate.
Thanks for your comments - keep them coming :)
:beer:
DaveH

DaveH:
Next was to make the guide posts and guide bushes.
The posts are 20mm dia the ends were stepped down to 16mm dia x 10mm long so that I had a shoulder to register on. Helps to keep it square, the guide posts were pressed into the base plate and welded on the underside.

The underside of the base plate with the weld cleaned up

:beer:
DaveH

DaveH:
Next up the top die. This is a chunk of steel 20mm thick x 100mm high x 380mm long. This top die needs a 'pointy' bit along one of the long edges. I don't have a mill with a tilting head and I only have one vice that tilts. So in the end I just used the one vice I was a little apprehensive holding a 380mm long piece of steel in one vice but it worked out fine. May be because it was 20mm thick helped. :scratch:
The 'pointy' bit being cut on the mill the angle of the V is 70deg. (included)

Finished

Just making sure it all fits

:beer:
DaveH

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