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+--- Thread: Press brake for 20 ton hydraulic press (/thread-2127.html)
RE: Press brake for 20 ton hydraulic press - DaveH - 06-24-2014
I have another question for Ed, Willie.
How much clearance did swag have between the guide posts and the hole in the guide post bush.
My shafts are 20mm dia, the hole in the bushing I made 20.5mm, so the hole is 0.5 mm (0.020") larger. Now it looks far to big, seemed a jolly good idea at the time
DaveH
RE: Press brake for 20 ton hydraulic press - EdK - 06-24-2014
(06-24-2014, 08:41 AM)DaveH Wrote: I have another question for Ed, Willie.
How much clearance did swag have between the guide posts and the hole in the guide post bush.
My shafts are 20mm dia, the hole in the bushing I made 20.5mm, so the hole is 0.5 mm (0.020") larger. Now it looks far to big, seemed a jolly good idea at the time
DaveH
Dave,
I'll check when I get home from work.
Ed
RE: Press brake for 20 ton hydraulic press - Highpower - 06-24-2014
.064" difference on mine Dave. Leaves a little wiggle room to allow the dies to self-align a bit I suppose...
RE: Press brake for 20 ton hydraulic press - DaveH - 06-24-2014
Thanks Willie,
Mmm .064" so my .020" should be OK. I agree there must be some room for the dies to align up, may be I should open it up a bit. I'll have to think about this
Daveh
RE: Press brake for 20 ton hydraulic press - DaveH - 06-24-2014
I've thought about it I'm going to open the holes up by another .020" that will give me .040" difference.
DaveH
RE: Press brake for 20 ton hydraulic press - DaveH - 06-24-2014
Done and dusted, bored out to 21mm a really good rattling fit
DaveH
RE: Press brake for 20 ton hydraulic press - ETC57 - 06-24-2014
That's really starting to look stout Dave.
I may have to try that design this winter my self, my cheeep and cheezzzze
works well for what it's intended but I would never tray any heave stock in it.
On second thought 
mabe when I no longer need it!!
Jerry
RE: Press brake for 20 ton hydraulic press - DaveH - 06-25-2014
(06-24-2014, 07:50 PM)ETC57 Wrote: On second thoughtThanks Jerry,
Jerry
You have nothing to lose
DaveH
RE: Press brake for 20 ton hydraulic press - DaveH - 06-26-2014
Did the 'pointy' bit on the top die.
Tried using the four jaw on the rotary table one end of the top die and the tilting vice the other end. Setting this up proved quite a mission and I just couldn't get it right.
So I decided to just use the one tilting vice and see what happens. Luckily keeping the depth of cuts below .020" it worked quite well. Certainly better than I though it would, may be being 20mm thick helped.
Sorry about the photos - a bit smokey from the cutting fluid.
[attachment=8746]
[attachment=8747]
I'll take some photo's of the finished top die tomorrow.
DaveH
RE: Press brake for 20 ton hydraulic press - EdK - 06-26-2014
Nice work Dave.
Ed