100 Ton Press Brake Build - Vevor Cylinders and Pump - FINAL - Assembly and Testing
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- Опубліковано 21 жов 2024
- These last few videos cover how I mounted the 50 Ton rams. It includes the design in TinkerCad, plasma cutting, machining to fit, final welding and installation on the press frame.
It finally comes together in this video! I'll cover final assembly, testing, and overall review of the press.
Heavy Duty Metal Brake
Thank you so much for the videos, very helpful, im actually about to start the 50" swag off-road and i was looking at the same hydraulic cylinders from vevor, now i know they work! Thanks again
I'm glad you are enjoying them and that they can help with a current project of yours. My only negative about the swag kit is it is intended only for thin material, so the vertical guides and springs are too short (in my opinion). But I'm pretty sure they never intended someone to put 100 Ton behind it for bending thicker material, lol.
The most challenging part of the entire thing was finding a manifold / "T" (I couldn't, so I had to make one). If you haven't seen the video on that one, I suggest checking it out.
If you run into questions or have issues, feel free to comment again. I do read them all and try to respond when and where appropriate.
@@MountainLaurelMetalworks sorry for the late response, I appreciate it, I did see all the videos related to the press brake,
Have a good day
As a rule of thumb, the v die width should need to be 8 times the thickness of the material.
How large is the H beam used in this press and what is the length between the uprights on the sides of the press. I would like to make one of these for my shop. Thanks
Stamping die design may help. Wondered why you would stand so close to the 1/2" being bent.
That should be a tensile failure, and if that hardened steel had shattered it would have the energy of a gunshot.
From a theory perspective only, imagine the forces at 30Ksi?!
Thank you.
I agree, he was very lucky! That 1/2” plate section. definitely has to be hardened in order to break like that.
This is a very cool project overall
Thank you for commenting! To add a bit of context, the 1/2" material was simple mild steel. My mistake was that I did not calculate the minimum bend radius. I left the sharp angle dies in the press when testing. Unfortunately that was too sharp of an angle for 1/2" material. As the angle was too sharp, the material failed on the backside causing it to tear into two pieces. Once it tore, the upper press die slammed into the bottom die; that is the "bang" heard on the video. However, it was still lucky as the dies are hardened steel and if any of them had shattered, it could have sent shrapnel into any direction(s). Lucky for sure, but defiantly my oversight.
Did you ever get the retraction speed increased? Awesome video series answered a lot of questions that I’ve been worried about on a hydraulic conversion on a shear I’m about to start
Not yet, I've been 'living with it' and it is proving to be as annoying as I anticipated. I'll end up modifying it once there is a break in work. Thankfully, we have been busy with customers (paying work :) )
When I do, I'll post a video of the process.
I purchased that same pump, it would only make 2500psi, and it's not adjustable, where did u get yours? Part #?
I purchased the pump through Ebay, but it was a Vevor brand. Here is the current link, but it looks like they may have made some changes (the color is different, they tend to do that when they make changes). www.ebay.com/itm/125853293471?mkevt=1&mkpid=0&emsid=e11060.m43.l3160&mkcid=7&ch=osgood&euid=5e2f251c898f4d66957840e041674a90&bu=43210864939&osub=-1%7E1&crd=20230509072015&segname=11060
Have you tried stalling the pump to see how much pressure it will build? The pump will only reach 10Kpsi when fully loaded, if the load is yielding (such as bending in a press) the pump will only reach the pressure necessary to bend the material. You can think of it this way, if there was no load (no hydraulic cylinder) but instead the end of the hose was open, the pump would generate nearly 0 psi, if you, hypothetically, put your finger over the end of the hose, the pressure would rise (do not do this, that was for example only).
@@MountainLaurelMetalworks yes, it bypasses at 2500 psi, the seller didnt have a answer, the link is similar to the one i bought but not the same, i will give it a try, thanks
Please let us know if you get it worked out and, if so, which pump you used. Just in case we need another in the future :)
Instead of using tube spacers, I would have seriously beefed up the upper part of the ram. If you do longer pieces it will underform everywhere that the two hydraulic cylinders are not directly overhead.
Thank you for commenting. If you are referring to the upper portion where the rams are mounted, there is little chance of noticeable deformation there due to the size of the beam and width. If you are referring to the carrier for the fingers, that would be possible trying to bend heavy material at wide widths. However the only heavy items (thicker than sheet metal) I need to bend are smaller in width. Mostly brackets for various purposes, most only a few inches wide.
The carrier beam size was considered in design, calculations shown sufficient strength for the widest items I need to bend. I didn't build the frame or components, this was purchased "as is" and upgraded with the hydraulic rams; so I worked with what was there to start. That being said, I do have some other mods in mind, such as making the vertical rise larger for easier part removal after bent, modifying the valve for faster retraction, and making some more press forms for round bends ( making new die set(s) ). I've also considered the mod you mention in beefing up the rigidity of the finger carrier for the 'just in case' chance I need to bend something wide and thick. This will most likely be some form of truss system to more equally distribute the load.
Nice Job Sir... Very nice! How is the pump working.. Good power?
So far, so good! I was hesitant being vevor, but it has held up and builds the necessary pressure to bend anything I've thrown at it.
Great Video, ¿the hydraulic cylinders won´t leak oil because of them being upside down?
No it wont do that unless the internal seals are worn.
Thank you for commenting. The seals within the hydraulic cylinder retain the fluid regardless of orientation. They are what permit a hydraulic cylinder to build pressure. It's pretty amazing, but when you think about it, these cylinders can accommodate up to 10,000 psi and it is only those seals which seal against that pressure.
What is the length of the stroke of the cylinders? I was thinking on using a 6 inch stroke.
I used a 6 inch stroke, this provides for the ability to bend thicker material as the bottom die can be quite deep with thick material. My idea was that I could then have at least 3" above the bottom die at maximum depth.
You could go deeper, leaving less room above the die, but then you could run into the issue of the material being bent hitting the ram or being difficult to remove once bent.
The formula for the die opening is 8× the material thickness. So to bend 1/4" the width of the bottom die at the top of the vee should be 2" .The width to bend 1/2" would need to be 4"... my dad built a 4' press brake with 2 cylinders similar to yours...probably about 60 tons. His is made of MUCH heavier materials and the bed (bottom crossmember) is bowed about a 1/2" I'm afraid you are going to be very disappointed if you get anywhere near 100 tons.
Thank you for watching and commenting! To be honest, this is overbuilt for what I actually need. You are correct in that the dies present were incorrect for bending material of that thickness. When I broke the chunk I wasn't really trying to bend it, just test the capacity. Also, I agree that it most likely could not accommodate a 100 Ton bend at width, but most of what I need to bend are brackets around 1/2" or 3/8" thick, so plenty of power there.
This was a piece I obtained in a bulk purchase. The seller had 3 20 Ton Air over hydraulic jacks on it and could never get them timed (which is almost impossible with AOH jacks) so he ditched the project. Since I was rebuilding it to use hydraulic cylinders, going with 50 Ton rams wasn't really much more $$ than 30 ton rams, so I want that route.