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Hey
I'm kinda upset cause I can't find a simple way to use my excavator hydraulic systems to make a sheet metal bender! I want one and I want everyone to show me how to do this!
Don't make me have to wait for details or ideas either.
I mean it :headscratch:
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Hi Ball baby - welcome to HomemadeTools.net :welcome:
Interesting build. Go ahead and try making a new discussion in our Tools in Progress subforum, and I'm sure you can get some good ideas: Tools in Progress
Hi Ball baby,
Welcome! :welcome:
I'm interested in the answer to your question, too. If there's a way to do it, someone here will set you on the right path.
What are you planning to make with the new bender?
Ken
That's a project I look forward to seeing, Ball baby. Welcome to the forums! :welcome:
Well?
What responses or ideas have occurred for this?
That amount of power will need fine control to avoid damage to apron and bed. That will dictate gauge and potential widths for a design. Will also require substantial trunnions, but eccentric cage pillow blocks that you can align will kick this in gear. Parallel is KEY to a brake, in both planes. What material do you intend forming?
To start off with from the way Your first post was worded it may not be well received by some,
However you didnot mention anything about the size or gauge of the material you desire to build this sheet-metal bender for
nor didyou state the size and breakout force of your excavator for all anyone here knows you may own a little mini excavator like a Kobelco 004 with only a few hundred pounds of force or a huge Kamatsu P600 with hundreds of tons of digging force.
Be that as it mayif you are wanting to use the bucket curl function as means to operate your bender the first thing you would need would be a means of attachment this can be done by the use of a quick tool change assembly similar the the picture below
Attachment 12929
If you already have one of these it is a simple task to design the bender around that allowing the excavator to replace your hands and arms
just add some pin locations that would resemble those of the bucket to something like this
Attachment 12930
If you are wanting to use the auxiliary hydraulics function then simply design your bender around the amount of pressure and flow that you have
Thanks everyone best response I've seen on newbie entry.
Sorry if I sounded like a ball baby at first.
My excavator is a Dawoo 140 and has a large blade thumb and 24' reach. I'd like ideas on my plan to build a bolt on bender to the blade and use the bucket for the bending force. Franks ideas are very helpful and run in parallel with my idea. I have not started the build or design just saw it in my mind while running the excavator see how the bucket force can be directed over the blade or the blade raised and lowered ad another way to operate the bending process. Like be able to bend 10 guage steel as this can curl and snap 18 " trees
Fun to be here. Just wonder why I didn't get a email notice that I had responses.
Hello Toolmaker
Can you explain some details on the pillow blocks? Would it be for the pins? I'm thinking of using the upper portion of the blade for mounting the bottom plate as it is flat and over 6 ft. Long.
Thanks Ken
Thinking of tool boxes and tool chests etc.
First I'll take Manhattan then I'll take Berlin
Unfortunately the available data on the internet about your machine do not give me the 1 piece of info I was looking for unless they are calling it the Bucket Digging Force this sounds like the overall force the bucket can exert on the teeth during the curl function the force of 24,471 lbs is considerable for a build such as you are contemplating which can be multiplied greatly by having a long swing arm on the break. should you go with a folding box finger break similar to the one in my picture
for a build such as a press break design you will find that the machine would be sadly lacking in both power and finite control unless you incorporated a cam like action above the punch beam
the blade in either case is going to be able to do little more than serve as a platform to mount the metal bender on.
Additionally you will find that trying to position the work in the break is going to be tedious possibly requiring 3 persons to operate this. 2 on the ground to place and position the work piece and 1 in the cab at the controls making it a very dangerous function.
bending metal on a machine like this will be like trying to put eggs in a carton without breaking them using the thumb and the bucket.
That being said the hydraulics of the excavator are impressive with 4694 norm &4978 PSI boost @ 30.12 GPM
You could always use the hydraulics VIA a remote to power a rather large standalone break of any size.
I think that if it were me and I wanted to build something that I could use my excavator as the brute strength to bend metal with and had a helper or 2 I would build a finger folding break that I could hang over the blade with quick tool change attachment on the stick then use the auxiliary function that controls the thumb to close the top clamp then use the curl and stick movement to power the folding beam.
Just my observations. and I don't mind offering or expanding on any build ideas.
Leonard Cohen Fan?Quote:
First I'll take Manhattan then I'll take Berlin
Before I leave to work this morning I started with this on pillow blocks.
https://www.google.com/search?q=adju...utf-8&oe=utf-8
The bearing is concentric with housing. Inner of bearing has eccentric bore. Went in looking for ''Dodge'' ''Browning'' and ''Martin'' companies ....taper lock hubs, bearings, that kind of stuff.
I agree
Use the power hydraulic pump readily available in the excavator a secondary control valve would be enough to turn it into a one-man operation. The the thumb itself has a continuous flow so that would make it possible to put the secondary control valve at the hands of the operator at ground level. I'll try to get a picture of the bending force of my first idea using the bucket over the blade for your enjoyment soon. Thank you very much
Here is one such valve of course there are many brabds offering the same or very similar unit
Flow-control valves | Products content from Hydraulics & Pneumatics
One key factor I have discussed many times over the years with experienced and student engineers alike, Heat is an enemy to a hydraulic system.
With each and every diversion of flow the potential for heat generation will be there. one way to reduce the flow restriction is to slightly oversize any additional valving which is installed in an existing system. If one takes a close look at the flow data of the valving on a machine they might find that the main valves were designed to handle 2 times to 4 times the actual GPM of the pump therefore if for instance the system is 30 GPM with 60 GPM valves these were designed factored in due to the possibility of 1 a higher flow replacement pump may someday be installed or 2 they were installed in an effort to reduce flow restriction or 3 that size happened to be more common and better suited for the application. If the size is 4 times over the flow size requirements it's anybodies guess as to why it was designed this way.
Wow Frank that's incredible information you offer.
I'm not sure of the flow rate and pressure on this dawoo 140 buy I have printed some of the maintenance manual from on line so I'll look over them.I am building two homes and only have limited time.
Thank you very much.
I never expected this much from a forum.
Here is the max flow of your machine at the pumps there are two main pumps the hydraulics of the excavator are impressive with 4694 PSI norm & 4978 PSI boost @ 30.12 GPM each. What this means is when traveling the right and left drive motors each can get up to that amount. But when operating the machine almost all brands combine the flow of both pumps for some of the functions and utilize the flow of one or the other for the rest of the functions.
Such as boom , stick, curl and in some machines the rotation as well will have 60 GPM . the blade any other Auxiliary like the thumb will have 30 GPM
Machines with selective computer control will have an auxiliary option for a hydraulic hammer which wold be both pumps.
I am not absolutely sure about how the Daewoo brand does theirs I was basing my information from my very long time ago caterpillar Kamotsu and John Deere experience That with the fact that I am contently working on a Ford 755 backhoe which is on a lifetime loan to me
This thread really should have been started in a different forum or moved if possible to get better exposure
I know there are some who will have more experience with this than I have
