Building a press

Discussion in 'The Forge' started by Bruno, Nov 26, 2018.

  1. Mike Blue

    Mike Blue Member

    I have a lot of funny stories to tell about Ed's forge and his press (any smith who uses a vertical forge and long welded rods to hold the work). I disagree with his tools but I can make them dance too and I've done a lot of productive work on tools I would not buy or build. I think it's better to be able to use any tool than to be limited because I don't prefer something.
     
  2. Bruno

    Bruno Administrator Staff Member

    True.

    Most of the things I have here are extremely simple. The kind of 'temporary' stuff that becomes permanent. My burner is held in place by a pair of vise grips that haven't come loose in 2 years :D
     
  3. Mike Blue

    Mike Blue Member

    I can admit to that too. Some thing gets jury-rigged and works and then finishing the job drops off the radar.
     
  4. Bruno

    Bruno Administrator Staff Member

    By 'not moving' I take it you mean it should be locked in place on all 4 side?
     
  5. Bruno

    Bruno Administrator Staff Member

    Btw I pulled the trigger after a last minute addition.
    I requested a ball valve at the high flow pump, after discussing the options with the vendor.
    With the valve, I can close the pump with the biggest flow.

    In that setting, I only have the slow, high pressure pump. The reason for that option is that if I do something like finalizing a razor hollow or aligning the different parts of a chef knife, I want a controlled motion. Having the ram move at 10 cm per second would make that process pretty difficult to control. Sure, I could work with spacer blocks to stop at the right thickness or so. And that will probably work in most scenarios.

    Maybe I'll never need it. But at this point it seemed like the perfect idea to at least add the option. Because once the unit is here, jerry rigging stuff is going to be more difficult and annoying.
    For now I have no other uses in mind, but frankly, once you have a hydraulic unit like that in your shop, it's not going to be that big a project to e.g. create a rolling mill :p
     
  6. Mike Blue

    Mike Blue Member

    Yes, the ram should only move up or down, never sideways in any axis.
     
  7. Bruno

    Bruno Administrator Staff Member

    Right before paying this weekend, I noticed something which cost me another couple hondo's.
    The mains plug was a standard 3phase 32 amps one. The motor should use far less, but I wanted to double check.
    At 3 phase 400, indeed the motor uses only 12 amps, but a 10HP motor has quite a surge current when starting up.
    I checked with the vendor and indeed, you need a 32 amp circuit to prevent tripping the breakers OR hook the motor to a soft start protection circuit.

    So the soft started was added. It's better anyway to have one, and in this configuration they add a 16 amp mains plug, and do startup testing to verify it won't trip a 16 amp breaker.

    It's more money, yet again, but on the flip side, these guys assemble and test everything before shipping so if you are not a hydraulics guy, you can know for sure that a) you're working safe, and b) everything works as expected.
     
    RezDog likes this.
  8. Bruno

    Bruno Administrator Staff Member

    I have a frame in mind, based on pictures and youtube videos, and information from Mike and Ed.
    In a rare stroke of intelligence, I have decided to make a small scale version of my frame in wood, just to get a feel for how everything will fit together in reality.
    Usually I'm a 'well figure it out as we go along' kind of guy when it comes to tools, but in this case it seemed prudent to double check my plans before I start ordering steel.

    As expensive as this thing is going to be, it'll probably come out at half the price of an off the shelf anyang press.
     
    Last edited: Dec 4, 2018
    32t likes this.

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