A bronze saw about 3500 BC was discovered in Egypt.
In Japan, there were about 20 saws excavated from the Kofun period.
In Miki, there were 3 saw smiths in Kanpo 2 (1742).
The forging technology and sharpening of the saw without any deviation is the ultimate product in pursuit of the toughness of steel.
It has been awarded as the best work of art.
1Raw materials
Useing high carbon steel
2Material cutting
Heat the steel to heat (800-900℃),Make a shape while training with a mallet.
3Forging (roughing)
Useing high carbon compounds.
4Annealing
The structure of the steel disordered by forge welding and forging is placed in a furnace heated to 750℃ and slowly cooled to spheroidize the structure.
5Leveling smoothing
Distortion becomes difficult to remove after quenching Therefore, remove most of the distortion before quenching.
6Shaping (immediately)
Shape it with a grinder or the like.
7Neck making
Forging the part that goes into the handle to the base of the blade.
8Neck shaping
Shape the neck with a grinder.
9Blade preparation
Shape the neck and core by pre-heating those.
10Quenching
Work to harden steel by heating it to 780℃ to 800℃, soaking it in water and quenching it.
11Tempering
Heat to 400℃ to make the steel sticky.
12Burning blade leveling
Remove rough distortion.
13Sharpening
Polish the surface.
14Material exact matching
Remove smooth distortion before finishing polishing.
15Buff sharpening
Finish polishing.
16Shape adjusting
Shape the peripheral part with a grinder.
17Cut
Cut the blade.
18Teeth alternation
Blade teeth linning of both faces.
19Top of teeth sharpening
Rub the top of the blade at an angle with a file.
20Inscription
Engrave a trademark, etc.
21Finish distortion removal
Remove the distortion caused by finishing.
22Handling
Attach the handle.
Complete
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