Hey Russ - take a look at this...

<a href="http://www.youtube.com/v/yKAq-zS77hg?hl=en_US&amp;amp;version=3" target="_blank" rel="noopener noreferrer" class="bbc_link bbc_flash_disabled new_win">http://www.youtube.com/v/yKAq-zS77hg?hl=en_US&amp;amp;version=3</a>

if you look at the 1:50 mark, they're PULLING the wire through the straightener a length at a time and then chopping it whilst its stationary.

Ian

That's  a very fancy set-up there !
We have a few similar 4-Slide Machines but none that does the rolled threading.

The major difference that makes the incremental feed problematic is that our cut length is 12' for shipment outside and 20' for in-house processing.

Another is the spools weigh about 600 lb.
Would be quite a rework to start and stop the straightener to control the feed length and to control that 600 lb spool accel/decell.

VERY neat though, thanks for posting.
Cool.

Russ

No worries. Whatever you do though - we're gonna need a video when it's finished 

Hi Ian,
  I did a little testing.
Ram is 2" dia. x 8" long, about 7 lbs.

Cylinder is 2.5" bore x 2" stroke.

Pics show the cyl extended with the recoiled gap and the "internals". Will experiment with various springs as it looks to provide a more than adequate wallop. Yep, all them clamps ARE necessary. Even slid them slightly.
Pretty well instantaneous but there is a little oscillation as the spring settles out right after the slam. But I think it will be well clear of the material ... hope so. Might need to figure a way to dampen it without affecting the recoil speed.   Its a bit worse when vertical.

Tried to do a vid, I need luck with that.

Next, I'll set up some actual cutters, too busy right now.

Russ

dang video is too large. Will get another.

Tried to do a vid, I need luck with that.

Pathetic 

dang video is too large. Will get another.

c'mon Russ - pull finger 

and I want to see it on youtube - not some gigabyte download... let's at least pretend we're pro's here 

Hell even Hood can manage that... 

 

Here's a shorter vid. I don't have a fancy phone. Never used this video camera deal much either.
Need to set the resolution down I guess, files are huge.
 

looking good. That should do it.

I don't have a fancy phone either - but hey Russ at least we can do videos that don't look like they've been shot through a hole in a fence! 

any progress Russ?

I'll tell you how fast it is, I just watched the video and got a black fingernail........ 

  Good one Brett 

I made a set of cutter blocks out of some D2 and heat treated them.
Set them in a small fixture to maintain the proper alignment.
It sends the cat a runnin', but it is not quite adequate for positively cutting the tube.
It will work very well on the smaller stuff using the Electro approach, so the job was not a complete blowout.

Will need to experiment further regarding the larger, tougher material. 

Russ