[Off Topic] Electron Micrographs of New and Used Abrasives

L

Lagrangian

Joined
Jun 25, 2011
Messages
400
I really liked this YouTube video which has a field engineer explaining many electron microscope pictures of new and used grinding wheels. I was surprised at how stringy swarf is from the abrasion process. Narrator said the high speed steel was approximately 60 HRC.


https://www.youtube.com/watch?v=SD1BJG-XcuQ
MN6DEHx.png
 
At very first glance (before watching the whole video), that image of the stringy swarf really makes me smile. At some point a while back, I remember a couple of us here had speculated in some other thread (no idea what the original topic was) as to what the swarf actually looked like, and therefore give some idea as to how abrasive particles actually do their work. It'd been postulated that maybe it vaguely resembled the material removed or 'gouged out' in metal-working operations, such as from a lathe. Looks like it does... :)

Thanks for posting this, and I'm looking forward to watching it now...


David
 
This looks like a gold mine to me, after watching it the first time. Gonna have to watch it again (& again, & again).

Good stuff, Lagrangian. Thanks again for posting it. :thumbup:


David
 
Oh yes it definitely resembles machining chips. If you reach your hand into the coolant/swarf tank on a surface grinder you'll get a big handful of mush that is actually teeny tiny metal shavings. They lock together like interlocking puzzle pieces. Imagine a "snowball" made of steel.
 
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