Author Topic: Non Gun Stuff... (Read 388885 times)

PegLeg45 · « **Reply #1720 on:** November 21, 2010, 07:44:13 PM »

Quote from: Solus on November 21, 2010, 07:24:49 PM

Ok..so how to you get a 'pipe' to extrude through the die?

Can't figure out how the center is supported?

Only way I can think of is retractable supports that are retracted just ahead of the billet as it moves through the die?

And then put back behind the billet.

Our biggest press pushed 2500 tons on a 9" billet. That's a lot of force. The friction causes the already hot billet to temporarily liquefy while being pressed through the 2-piece die set. Like in the photo below, the billet contacts the side with the 4 triangular holes and flows to the output side with the round shape, flowing around a center mandrel creating a pipe or tube.

http://en.wikipedia.org/wiki/Extrusion

PegLeg45 · « **Reply #1721 on:** November 21, 2010, 07:46:45 PM »

Quote from: tombogan03884 on November 21, 2010, 07:34:29 PM

Cool,
Here's a video of the kind of machines I've been running

Tom, we used the CNC and EDM machines to make our die sets.

tombogan03884 · « **Reply #1722 on:** November 21, 2010, 08:49:08 PM »

One of the video's at Youtube was of a machine I have actually run (that brand and model ) roughing a die, but it was for a press, not extrusion. Also I thought the engine block would be more interesting to the Gear heads here.

EDM is cool, We used them the last place I worked, extreme accuracy, and small complex shapes, but it is a relitively slow process and they are a SOB to get adjusted if you are trying to run a variety of different parts, not only do you have to get the right voltage to minimize slag/burr, but wire diameter, composition, tension and speed are also variables that need to be balanced. then the first roll of wire runs out and you have to adjust for minor variations in the next one.
All the EDM guys I know drink, a lot

TAB · « **Reply #1723 on:** November 21, 2010, 09:08:56 PM »

A good edm guy can make $$$$,

tombogan03884 · « **Reply #1724 on:** November 21, 2010, 10:03:45 PM »

Yes, to bad so many go crazy or get psorosis first.

Wow, even spell check can't help me with that one

Sponsor · « **Reply #1725 on:** **Today** at 03:14:39 PM »

Solus · « **Reply #1725 on:** November 22, 2010, 05:55:38 AM »

Quote from: PegLeg45 on November 21, 2010, 07:44:13 PM

Our biggest press pushed 2500 tons on a 9" billet. That's a lot of force. The friction causes the already hot billet to temporarily liquefy while being pressed through the 2-piece die set. Like in the photo below, the billet contacts the side with the 4 triangular holes and flows to the output side with the round shape, flowing around a center mandrel creating a pipe or tube

Got it. Like passing a thread through an ice cube and leaving the ice cube intact.

Thanks, Peg. It's good to know how stuff works.....

Pathfinder · « **Reply #1726 on:** November 22, 2010, 06:06:48 AM »

Quote from: tombogan03884 on November 21, 2010, 10:03:45 PM

Yes, to bad so many go crazy or get ~~psorosis~~ cirrhosis first.

Wow, even spell check can't help me with that one

FIFY

I've had lots of experience helping my son this way. ever see Word crash because of misspellings? i have. it is a sad sight, let me tell you, but he managed it more than once.

tombogan03884 · « **Reply #1727 on:** November 22, 2010, 10:38:22 AM »

Quote from: Pathfinder on November 22, 2010, 06:06:48 AM

FIFY

I've had lots of experience helping my son this way. ever see Word crash because of misspellings? i have. it is a sad sight, let me tell you, but he managed it more than once.

Thanks Path,
No, I haven't quite managed that yet