What's Really Happening On A Lathe???

I don't think you really know what's happening when you're watching metal being turned on a lathe.

I know I didn't until just a short time ago.

http://www.wimp.com/cuttingsteel/

 

Interesting but also sleep inducing after a minute or two.

 

That was cool. There realy is no "cutting" is there? Only controlled destruction and it was also interesting to see how the actual tip of the tool bit did very little cutting at all. It was mostly done by a leading bit of captured original material.

 

i dont remember it creating that orcestra sound when i was running a lathe. funny my cutting speeds must have been off. . . . .

 

That's pretty cool...it is a bit hypnotizing.

 

forgot the chip breaker

 

i understand know why it is good to have sharp bits.

 

Some of that looked straight out of surfing footage...

I have wondered where that fine line was between cutting and not-exactly cutting. If you ever look a nicely machined surface.. that 32 or 16 finish under heavy magnification looks like the back side of the moon.

Bob

 

It's hard to make any money cutting that slow! JC

 

Cutting seems to introduce many, many small cracks into the surface of the work. Seems like uncut cold rolled steel would be stronger than cut cold rolled steel of the same diameter. I wonder what grinding looks like.

 

Thanks for posting that video. That was incredible. Almost looked like plowing snow instead of machining steel.

 

I'm thinking I should have watched this video at 2:30 this morning after my teenaged daughter woke me up because of a supposed nightmare. Cool to watch and, yes, sleep inducing. I'm wondering if most work is as sloppy as that looks. It looked like the piling waste was doing most of the "cutting" in one of those clips.

 

Very interesting, especially to see the actual "cut" to be a fracture above the the cut line and the workpiece deformed to proper diameter by the cutting tool. Who would have guessed? Maybe that is why it is sometimes impossible to take off less than a thou?

Sure would like to examine the finish produced in the video!

Bill

 

That's not what I expected! Amazing what you can see with a high speed camera.

 

That's why cams and cranks are ground.

 

When I was in the navy, I watched a big "chip" being sheared off when two ships very slowly slid past each other. I was about 2' away and the "chip" was about 1/2" thick. No noise, and slower than the vidio.

 

Like a hot knife through butter. I had to turn it off too, I was starting to nod off.

 

My guess is that it look pretty much the same, if you magnify it enough.

 

Looks like cheese being sliced

 

Wow-looked like fluid, not solid.

 

wow, cutting tip appears to do very little to no actual cutting. amazing

 

wsdad,..... Optomist says glass is half full

Pessimist says it's half empty

Government says "we're taxing your glass"

4TTRUK

 

It really shows the elasticity of metal.

 

I'm thinking it probably looks like cutting, but with lots of fireworks! And with better music!

I think I already knew this, but as previously stated, what we think of as "cutting" metal is actually "melting" metal at a molecular level. Like using a miniature cutting torch but with no flammable gasses required!

 

That does not look like lathe turning to me, looks more like it was done on a planer or shaper, looks like a flat surface underneath to me, and 30 degrees rake is way more than I would put on a lathe tool, unless maybe turning aluminum.

 

Ding! That is exactly what it looks like. Fluid-dynamics.