prototype hammer vid

[The Iron Dwarf]

for those interested here is a little vid of the new prototype hammer, at the moment it is uncased and is running at about 50% speed, think I can also double the weight of the hammer as the motor is under little load
http://www.youtube.com/watch?v=xLnqLn7y ... F9868DE594
dont know if this will work but will try it
25mm round hammering = a 1" or 25mm mild steel bar being drawn out to 1/4" or 6mm square.
emergency stop = 2 tests of the stopping time.
workings = some of the insides though the finished one will be different and this was just to test the action.

[Thomas Powers]

I can see it, are the dies quick changeable? (or planned to be...)

At that speed it looks like it could be a great dishing hammer with a gentle curved top and a dishing form bottom.

[The Iron Dwarf]

both top and bottom tools use a plate with 4 bolts, machine clamps could also be used or maybe even just pegs to go in the holes on the bottom tool
I think when making the vid we had it at about 100 to 110 BPM but when not filming we did use it at over 200 BPM.
it has a geared 3 phase motor that at 50Hz ( normal here ) gives us about 200 rpm.
tick over is at 14 Hz and speed it up to 25Hz and it is hammering, have set the max as 60Hz at the moment.
mostly during filming it was on about 30 Hz

here 3 phase 440 volt is only normally available to industry like at my workshop but this runs on an inverter to vary the frequency

this was the first time it was tested with any hot metal, previously it was hammering cast lead into ribbons and turning oak into splinters.
the top tool is flat and the face is about 2 1/4" diameter ( 55mm ), the bottom one is a bit of 1 1/2" ( 40mm ) wide handrail section.

[Sean Powell]

Sweet! Does that use the sprocket I drew up for you? Is it actually working? I always wonder when stuff is designed 'by the book' without any practical experience in the matter.

Sean

[The Iron Dwarf]

for this one I had a gearbox but the next one will have the sprocket in and all those after it.
have got to get this one finished and re-homed where it can be tested and improved.
the next one will be the finished design of the Mk I, later I will work on a Mk II with a straight stroke.

so far have one sprocket cut out
the anvil on this machine weighs just over 50kg ( about 1 cwt ) and the rest of the machine is not much more, that will go up with the addition of the casing but it will still be a very light machine with a good hard hit