Ok, what the heck is this...

cbwx34

cbwx34

Joined
Dec 27, 2004
Messages
2,270
What is this....

[video=youtube;l_zoCCCOTYQ]https://www.youtube.com/watch?v=l_zoCCCOTYQ[/video]

(and why is it labeled knife sharpening?)
(Mostly want to know what it's really doing).
 
Haha. Thanks. I knew it wasn't sharpening... but had no idea what it was. :confused:
 
As Danke42 said, it's induction hardening... absolutely nothing to do with sharpening.
 
So, now that I know what to look for, can it be used for anything knife making related (practical)? I see where some reference making a metal forge... but looks more like "proof of concept", rather than any being used 'real world'.
 
in theory it could be used for annealing, and heat treating, but induction coils tend to heat super fast as shown. would be very difficult to heat accurately and maintain temperatures.
 
Case Knives uses induction heating to anneal the tangs on their blades for later fitting (bending/crinking) into folding knives. The apparatus they use is like a big wheel (carousel) on which the blades are magnetically held at the edge (tang overhanging) and the wheel is rotated near & under induction coils to anneal the tangs. There's a video in the 'How it's Made' series which shows it, in a tour of Case's manufacturing operations. It's shown below, at ~ 1:08 into the video:

[video=youtube;BSz5P8Ak4_g]https://www.youtube.com/watch?v=BSz5P8Ak4_g[/video]


David
 
cbwx34 said:
So, now that I know what to look for, can it be used for anything knife making related (practical)? I see where some reference making a metal forge... but looks more like "proof of concept", rather than any being used 'real world'.
Click to expand...

It can create heat very fast and I have used it in the real world but not for knife making. We had a similar coil set up only larger diameter. We'd stick a capped sonar sensor into the coils, capped end first to heat it up so that we can break it open. But in order for it to work, what you're sticking in it has to be electrically conductive.

But I really think there are more efficient ways to heat metal. In addition to the energy conversion, you need a pump running to run cooling water through the coils.
 
There are a few makers using them as a heat source for forging. Heating is very fast and by all accounts very controllable once it's properly set up.
 
You must log in or register to reply here.
Back
Top