Hopefully this jig could assist other knife makers. It's used for straightening a bend in a blade after heat treatment of forged blades. I got the design from a well known knife maker in South Africa and it works very well.
This process is for a hardened blade. Right after it comes out of the quenching solution, I check the blade for straightness. If there is a bend, I place it in the jig immediately and then bend it in the opposite direction passed the point of straightness. Then I remove it and check if I got the bend out and try again.
I have noticed that if I don't do this with haste, the blade will get to a stage where I can bend it but the blade will not retain the bend. This seems to happen after 5 minutes after the quench.
I have tried hitting the bend out on the anvil but that was a diabolical decision as the blade cracked right through. In the past, I would anneal the blade, then use the jig to remove the bend and then normalize and requench the blade.
This process is for a hardened blade. Right after it comes out of the quenching solution, I check the blade for straightness. If there is a bend, I place it in the jig immediately and then bend it in the opposite direction passed the point of straightness. Then I remove it and check if I got the bend out and try again.
I have noticed that if I don't do this with haste, the blade will get to a stage where I can bend it but the blade will not retain the bend. This seems to happen after 5 minutes after the quench.
I have tried hitting the bend out on the anvil but that was a diabolical decision as the blade cracked right through. In the past, I would anneal the blade, then use the jig to remove the bend and then normalize and requench the blade.
