IṢẸ́ ỌNÀ
ẸWÀ ÀTI ÌLERA
IṢẸ́ ỌWỌ́
ÀṢÀ ÀTI ÌTÀN
ÌṢERÉ
ÀYÍKÁ
OÚNJẸ ÀTI OHUN MÍMU
REVERSE ENGINEERING
SÁYẸ́ǸSÌ
ERÉ ÌDÁRAYÁ
ÌMỌ̀-Ẹ̀RỌ
ÀWỌN OHUN WÍWỌ̀
Forged Cross-Peen Hammer
Smiths make their own hammers. A bar of high-carbon steel is punched through hot for the eye, the eye is opened to shape with a drift, one end is drawn into a peen, and the head is cut off the bar. It is hardened all over, then tempered by heat run from the middle: the eye and cheeks are left soft (blue) so they do not crack, the faces harder (straw) so they do not dent. The handle is riven ash or hickory, wedged into the eye.
Ilọsíwájú
A day
Ìlànà
1
1
Square the bar
Square the bar
Forge crucible steel into a square bar about 30 mm across, long enough to hold by one end.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Irin líle tí a yọ́ nínú ìkòkò2 kg
Èédú Ìṣùu15 kgÀwọn irinṣẹ́ tí a nílò:
Ìléru alágbẹ̀dẹ
Ìdí Alágbẹ̀dẹ
Òòlù ńlá
Ẹmú alágbẹ̀dẹ
Aṣọ Ìdílé Awọ
Ìbọ̀wọ́ wẹ́lídìn
Gíláàsì ààbò
Ìbòjú etí ààbò2
2
Punch the eye
Punch the eye
At a yellow heat, drive the hot punch halfway in from one side, turn the bar over and punch through from the other side over the anvil's hole. Cool the punch often.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Omi5 lítàÀwọn irinṣẹ́ tí a nílò:
Ohun ìlu ihò gbígbónáÒòlù ńláÌdí Alágbẹ̀dẹ
Àpótí ìtutù3
3
Drift the eye
Drift the eye
Drive the drift through the hot eye from both sides to open it to the handle's shape.
Àwọn irinṣẹ́ tí a nílò:
Ohun ìfẹ̀ ihòÒòlù ńlá4
4
Draw the peen
Draw the peen
Mark the head's length. Draw one side of the eye into a wedge-shaped peen with the fuller and flatter, its edge across the handle's line.
Àwọn irinṣẹ́ tí a nílò:
Fuller (irin ìgbẹ́ ìlà)
Ohun èlò ìpẹ́rẹ́Òòlù ńlá5
5
Cut off and dress
Cut off and dress
Cut the head off the bar on the hot-cut hardy. Square and slightly dome the face; round the peen's edge.
Àwọn irinṣẹ́ tí a nílò:
Ọ̀bẹ ìgé lórí ìdí alágbẹ̀dẹÒòlù ńlá
Àkójọ Ìfá6
6
Normalise
Normalise
Heat it to a red heat and let it cool in still air, three times, to relieve the forging.
Àwọn irinṣẹ́ tí a nílò:
Ìléru alágbẹ̀dẹẸmú alágbẹ̀dẹ7
7
Harden
Harden
Heat evenly until a magnet no longer sticks, and quench it in warm oil in a lidded bucket, moving it, for a few minutes.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Òróró canola5 lítàÀwọn irinṣẹ́ tí a nílò:
Ìléru alágbẹ̀dẹ
Òòfà
Garawa irin pẹ̀lú ìbòẸmú alágbẹ̀dẹÌbọ̀wọ́ wẹ́lídìn8
8
Temper from the eye
Temper from the eye
Sand the faces bright. Heat the middle of the head with the torch and watch the colours run out toward the ends: when the faces reach straw and the eye is blue, quench it in water.
Àwọn irinṣẹ́ tí a nílò:
Bébà ìpọ́n
Ọ̀pá Iná PùróféènìÀpótí ìtutùẸmú alágbẹ̀dẹ9
9
Handle
Handle
Shave the handle stock to fit the eye tightly, drive the head on, saw a kerf in the handle's top and drive a glued hardwood wedge into it. Trim flush and oil the handle.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Igi Líle Fún Ìdìmú1 ẹyọ
Gọ̀gọ̀ igi líle1 ẹyọ
Òróró Ọ̀gbọ̀10 mlÀwọn irinṣẹ́ tí a nílò:
Ayùn onídìmú méjì
Ayùn ẹni méjì
Ìdìmú Tábìlì10
10
Troubleshooting
Troubleshooting
Hammer making troubleshooting.
Flow
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Àwọn ohun-èlò
7- 15 kgÀyè
- 5 lítàÀyè
- 5 lítàÀyè
- 1 ẹyọÀyè
- 1 ẹyọÀyè
- 10 mlÀyè
Àwọn irinṣẹ́ tó nílò
22- Àyè
- Àyè
- Àyè
- Àyè
- Àyè
- Àyè
- Àyè
Ìtọ́nisọ́nà yìí ń ṣe
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