[Help] usability of cutting blade

[501560789]

Good morning,

I need your help.

Two (hardener ss) metal cutt of blades ( V blade profiles) cutting/shearing copper wire in serial production. After 20k of cuts, for 1 day production, brand new blades are dulled/blunted. I think is to fast blunted.

Is there a possibility to estimate life of the new blade till they will dont cut hole wire x section?
I think all boundary conditions are known, same as gap between blades.

Do you think that additional some TiNi coat on blade will increae friction resistance?
In which way I can improve life of the blade?

Thank you for your any suggestion.
cbdu

 

[501560789]

No idea for relability?
Any help?

 

[IRstuff]

Blade failures are strictly a wear mechanism, and should be described by the Arrhenius equation, whose independent variable is temperature. You need to make some controlled measurements to isolate the various factors that contribute to the activation energy of the failure. You can try cooling the cutting blade, which ostensibly should reduce the wear. Lubrication might be a simple way to find out if there are frictional heating contributions.

Has this always been a problem? Has the cutting process changed over the years? It would be unsurprising to find out that the cuts per day has doubled over the years, resulting in a possibly an 8-fold decrease in life. 20,000 cuts per shift is about 0.7 cuts per second.

Can you borrow or rent a thermal camera to look at the temperatures you're achieving during the cutting process?

TTFN

FAQ731-376