This. . . .don't need to make things more complicated than they need to be. Also have the option of using the same machine for many different jobs in the futureFor 20 pieces a day? You need a press brake to run the rotary, just get one with a cnc back gauge and forget the rotary. That makes it what, a 10 minute job per day? Or go old school and set two fixed stops, one for each end.
Mass production doesn't mean a lot, it means I'll be doing this process for a very long time.20 pics a day is nowhere remotely close to mass production lol.
For real production you need a real purpose built press.
Dicking with hydraulics and a frame without substantial slideways will make repeatability in production impossible.
Not quite. I replied to your message and asked 2 question which went unanswered.With each post I think we’re getting closer to the use-case and the original design is not ideal.
Mass production doesn't mean a lot, it means I'll be doing this process for a very long time.
Define a "real purpose built press".
I have no idea what you are trying to say.
Hey Ries, a horizontal press is a great idea. Can definitely use this in my shop. Thanks man, I really appreciate it.Personally, I would just be doing 20 a day by hand on the hossfeld, but I have been using the hossfeld for so long that setup, stops, and so on are just second nature for me.
But in a real production environment, I would be going with a horizontal press, not a press brake. Something like this spanish machine would be great. Although there are a good dozen different machines like this from Italy, Spain, Germany, and China out there on the market. The big advantage is how many other things you could use a machine like this in the other 23 and 3/4 hours of a day when it wasnt bending your 20 pieces of flat bar. https://www.directindustry.com/prod/prada-nargesa-sl/product-24785-1823278.html
Or this Hebo, which will clearly handle the material thickness you want. I have a different Hebo machine I bought about 20 years ago, built like a brick shithouse.
Or knock off the Edwards, since Edwards are all really simply made, should be pretty easy.
What Garwood is getting at is maintaining parallelism of movement with off center loading. Your single point set up is highly succeptable to off center loading. You may even get variations in material that will cause the punch to cock sideways. This sideways movement becomes self actuating, i.e., it gets worse rather than self correcting. A real punch press uses significant slide ways to maintain parallelism in spite of off center loading. A press brake also has mechanisms to ensure parallel movement when the load on the ram is unbalanced.
The goal is to make precise parts and remove all potential for error. Speed is not as important but consistency is. I figured if I had a jig that can do both bends at once, all of the parts will be identical.What is your goal? To build a single use bending machine or make $? Accuracy on any press brake starts with the material, nuther subject. But any CNC press brake will do each bend is seconds. Many older brakes can be fitted with a CNC back gauge as well. The back gauge moves after each bend. The accuracy of the final part is determined by the blank size too. I bend a lot of assemblies and all parts need to be accurate or the assembly just does not happen. Accurate blanks, accurate back gauge, accurate bends. Bob's your uncle.
And the press brake can be used for loads of other things after you did your 10 minutes a day job.
I have two 5 ton OBI presses. What tonnage do you think might be the least I would need to bend 3/16" 6" wide stainless steel plate?If this is for your own product forget this custom press stupidity and buy a larger size OBI.
Simple obi tool you can build from laminated laser cut plate will form that part in one hit perfectly.
Press brakes are great, but cheap shitty ones are just that. Obi's are cheap. Making a product? You should have obi's.