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Re: 40Ton Hydraulic Press Brake Originally Posted by acourtjester BB you may look at documenting the construction info about the press along with many images and drawings you have, into a package. And put it up for sale on eBay, I did that with 2 projects I made and sold over 500 sets of each world wide. You can use the Google drive for storage and just send the link to those that purchase the plans for them to download. Great project and put some extra jingle in you pocket. In some CNC and offroad groups people have asked for the design. The issue is i've made the file a mess at this point with my constant chaotic ideas and design changes. I need to find the time to clean it up.
Re: 40Ton Hydraulic Press Brake
Re: 40Ton Hydraulic Press Brake Originally Posted by kb0thn for air bending in a press brake, 0.001" matters. It's fractions of a degree. CNC press brakes have encoders to measure ram position and servo valves with feedback loops to set it. Mechanical brakes or brakes like Diacro's Hydmech use screws to position a cam and are quite repeatable. For your brake if you want repeatability you are best running it bottoming bending (coining) where the punch and thing to be bent and die all come together. It needs a lot more tonnage than air bending, but you can get perfect 90's. FWIW Maybe add a micrometer head for fine adjust. Switch repeatability would also be a concern. I still think that sort of accuracy is achievable with his press.
Re: 40Ton Hydraulic Press Brake for air bending in a press brake, 0.001" matters. It's fractions of a degree. CNC press brakes have encoders to measure ram position and servo valves with feedback loops to set it. Mechanical brakes or brakes like Diacro's Hydmech use screws to position a cam and are quite repeatable. For your brake if you want repeatability you are best running it bottoming bending (coining) where the punch and thing to be bent and die all come together. It needs a lot more tonnage than air bending, but you can get perfect 90's. FWIW
Re: 40Ton Hydraulic Press Brake BB you may look at documenting the construction info about the press along with many images and drawings you have, into a package. And put it up for sale on eBay, I did that with 2 projects I made and sold over 500 sets of each world wide. You can use the Google drive for storage and just send the link to those that purchase the plans for them to download. Great project and put some extra jingle in you pocket.
Re: 40Ton Hydraulic Press Brake Added a proximity sensor as the depth stop. Made a holder that pivots out of the way if the switch ever fails to avoid damage. Gonna probably replace the ruler with a fine thread screw i don’t really love the adjustment there I thought having a scale to go off would be nice but the machine isn’t really repeatable enough I don’t think to have set numbers in your head. Better to do test pieces beforehand with some coupons and set it. Attachment 1764055
Re: 40Ton Hydraulic Press Brake Never ending passion project continues. My original design used 1” strips with countersunk bolts to keep the ram from swaying. Unfortunately this wasn’t good enough and it could wobble around 1/8” side to side, surely effecting accuracy as well as making it difficult to center the bottom die. Had a friend machine these slotted/countersunk ones as a replacement and now it’s grease tight. I was considering if it was worth drilling an intersection L shape on the ram and putting a grease fitting on it, but it’s probably a waste for how often I use it. Lastly i finally put the oilite thrust washers in to replace the standard zinc washers. Probably not necessary either but for $20 why not. Only thing really left now is to get the depth stop limit switch installed. I’m also going to cut off the front leg gussets they’re pissing me off. Attachment 1759505 Attachment 1759507 Attachment 1759509
Re: 40Ton Hydraulic Press Brake Back at it again this week. Got the new motor electric box designed and made. Took a few tries definitely Wasted $10-15 in filament. My own stupidity. End result 90% what i wanted I’m not redoing it again at this point. Leave well enough alone. Got the electrical all wired up. Definitely a tight fit but it worked out. The original box basically wasn’t big enough to incorporate the wires for both the solenoid (110v) and the motor plus its contractor (220v). So it needed two separate plugs before. Attachment 1759235 Attachment 1759237 Attachment 1759239 Attachment 1759241 Attachment 1759243
Re: 40Ton Hydraulic Press Brake Made the riser today. I had to fudge it a little bit as it turns out the mount for the carriage isn’t square. I probably was off when I bent it, I will have to make it again at some point but i was able to shim it for now. I cut the shaft for the wheel down to a rough size, still not sure about a lock mechanism. It honestly is quite difficult to move the carriage by accident I may just leave it, since you can use the DRO to gauge if it moved anyway. Attachment 1756219 Attachment 1756221
Re: 40Ton Hydraulic Press Brake Great back stop. Dave Originally Posted by BrooklynBravest Slowly but surely. It works, will try and mount it this weekend. Will be an extreme improvement to have a backstop. Had to drill out the sides of the carriage for the DRO mount. Design and print attachments for the scales. Attachment 1756011 Attachment 1756013 Attachment 1756015
Re: 40Ton Hydraulic Press Brake Got it mounted and operational. Needs the riser still to meet the work piece and a lock mechanism. Left the shaft long as it needs to come out some for whatever lock setup I use but overall super excited to see it on there. Attachment 1756125 Attachment 1756127 Attachment 1756129 Attachment 1756131 Attachment 1756133
Re: 40Ton Hydraulic Press Brake Slowly but surely. It works, will try and mount it this weekend. Will be an extreme improvement to have a backstop. Had to drill out the sides of the carriage for the DRO mount. Design and print attachments for the scales. Attachment 1756011 Attachment 1756013 Attachment 1756015
Re: 40Ton Hydraulic Press Brake You got away cheap.
Re: 40Ton Hydraulic Press Brake Today I learned how a ball screw works… As well as how to ruin a ball nut. Lesson learned, unless life or death don’t remove the nut from the ball screw. Ball returns got damaged trying to get it back on, $18 for a new one… Attachment 1755201 Attachment 1755203
Re: 40Ton Hydraulic Press Brake Printing some parts to mount the DRO scale. Attachment 1755083Attachment 1755085Attachment 1755087
Re: 40Ton Hydraulic Press Brake Making progress slowly Attachment 1754583 Attachment 1754585
Re: 40Ton Hydraulic Press Brake Originally Posted by N2 Welding Making a back stop for repeatable bends? My original plan was to have it powered with a DRO. After looking into it though, it's just a silly novelty on a press like this. I ended up using the power slot on my electrical box that was intended for the DRO, for the limit switch (not mounted yet) and decided manual with a battery powered DRO is far more practical. This is where I got the idea from, this guy I talk to used my press design to make his own and this is what he did for a back gauge. I do not want to be going around back of the machine to adjust this however so I am spinning it and running a shaft with the wheel to the front. Attachment 1753353
Re: 40Ton Hydraulic Press Brake Originally Posted by BrooklynBravest I mean for the alignment of the punch. I have a magnetic one with a protractor and straight edge on it. Oh, oops. I was still on my first cup of coffee. Sent from my Lincoln Buzzbox using Tapatalk
Re: 40Ton Hydraulic Press Brake Originally Posted by 52 Ford This style angle gauge? https://www.kleintools.com/catalog/l...auge-and-level Sent from my Lincoln Buzzbox using Tapatalk I mean for the alignment of the punch. I have a magnetic one with a protractor and straight edge on it.
Re: 40Ton Hydraulic Press Brake Originally Posted by BrooklynBravest I considered it, but aside from being $250 in parts each, it would be more trouble than it’s worth. On the rare occasion it was angled I’d just do it by eye or with the angle gauge I have. This style angle gauge? https://www.kleintools.com/catalog/l...auge-and-level Sent from my Lincoln Buzzbox using Tapatalk
Re: 40Ton Hydraulic Press Brake Originally Posted by Meltedmetal Maybe you should do 1 at each outside end with the stop mounted to pivots so that if you wanted to do a batch of pieces at an angle you could set your stop angled. I considered it, but aside from being $250 in parts each, it would be more trouble than it’s worth. On the rare occasion it was angled I’d just do it by eye or with the angle gauge I have.
Re: 40Ton Hydraulic Press Brake Maybe you should do 1 at each outside end with the stop mounted to pivots so that if you wanted to do a batch of pieces at an angle you could set your stop angled.
Re: 40Ton Hydraulic Press Brake Making a back stop for repeatable bends?
Re: 40Ton Hydraulic Press Brake Messing around some. It would be easily removable with 4 bolts. Attachment 1753331 Attachment 1753333 Attachment 1753335 Attachment 1753339
Re: 40Ton Hydraulic Press Brake Originally Posted by Boostinjdm A Z bend can hit it. Especially with a center mount design. Fair point, it is 5” below the working deck though so for the most part I don’t think it would be an issue. I typically work with small parts as well, but it would ultimately be removable with a couple of screws. My real issue is I’m not sure if this $180 one is a waste over the $100 option. One has an extra ball screw pillow block basically.
Re: 40Ton Hydraulic Press Brake A Z bend can hit it. Especially with a center mount design.
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