How to plumb a one-way ram with a dual circuit hydraulic control??

[zachv]

I bet that title is a little confusing. I have a Hossfeld hydraulic ram setup that runs a double-acting ram for my JD2 bender. I am looking to buy this notcher: http://vansantent.com/tube_coping_machines/mittler_hyd_notcher.htm

The notcher comes with a hydraulic ram that only needs fluid in one direction and then returns with spring action. My bender ram has a mechanical control with a lever that controls fluid in and out. How in the world could I operate the new notcher ram with the hydraulic system from the bender? Any ideas from the hydraulic experts??

Thanks.

[X-Rated]

I have never understood those type of notchers. They might be great if you work in a steel fence production shop and every notch you do is 90 degrees, but on my buggy, I did 90 degree notches, 1 out of every 20 MAYBE.... Probably less. So how do you do other angles???

[zachv]

I have a JD2 TN-100 hole-saw notcher for cages and angled notches, but we do a ton of 90 degree notches on our production line and I need something faster that I can have one of my guys use that does not require much thought process. Also, sometimes I have my Dad in the shop helping and the drill can rip out of his hands and I don't need to kill my Dad just yet. Not much of a inheritance so he is more good to me alive--for now. ;)

[rock mafia]

You need a single acting pump to run that nother. If you look a little, you can find one for about $200. Alot of body shops use them for frame jigs.

http://www.mytoolstore.com/otc/4020.html

[Maude]

Let me see if I can describe how this could be done. The return line from your bender could run into a T, then one leg of the T would go to the notcher and the other to a valve then on to the tank. To operate the notcher, merely close the valve, creating pressure in the line. Opening the valve would release the pressure, allowing the spring to return the cylinder. You might have to play with the diameters of hoses and valves to get it to work properly, especially if you have a high volume pump. The problem with this system is that there would be no way to make the cylinder stop except at the ends of the travel of the ram.

Possibly another way to accomplish the task would be to put another valve in the pressure side of the system with the pressure in on the appropriate orfice, and the return going on to the other valve. One outlet would go to the ram and the other outlet would be T'd into the return line. When the valve was actuated, it would extend the ram. In the center position, the ram would hold in its current position. In the opposite direction, it should release the pressure and allow the springs to bring the cylinder back in.

Neither of these methods have been tested, just coming up with some thoughts that might help you.

Wilsn

[TR]

hook one end up to the ram and put the other end back to the tank. When you force it down it will go down and stay when you release the handle. when you want it to come back the spring will push the fluid back to the tank. So it is do able with out buying anything else.