SANAA
UREMBO NA USTAWI
UJANJA
UTAMADUNI NA HISTORIA
BURUDANI
MAZINGIRA
CHAKULA NA VINYWAJI
UHANDISI WA KINYUME
SAYANSI
MICHEZO
TEKNOLOJIA
VAZI
Forged Cold Chisel
A cold chisel cuts cold metal, so its edge must be hard and its body tough. It is forged from octagonal tool steel: the head end is tapered, the blade drawn out at a yellow heat and finished with a flatter just above the hardening heat. Only the edge is hardened, by dipping it in water while the body stays hot, and the heat left in the body then tempers the edge; it is cooled when the edge shows blue tinged with red, about 570 °F (300 °C). The edge is ground to 60°.
Kati
1–2 hours
Maagizo
1
1
Taper the head
Taper the head
Heat the head end to a yellow heat and taper it.
Vifaa kwa hatua hii:
Kipande cha pembe nane cha feleji ya zana1 kipandeZana zinazohitajika:
Fua ya mhunzi
Fuawe
Nyundo ya Kufua
Koleo za mhunzi2
2
Forge the blade
Forge the blade
At a yellow heat, draw out the other end into the blade over the anvil's edge. Finish with a flatter just above the hardening heat; hammering it when black crushes the grain.
Zana zinazohitajika:
Kisawazishi cha uhunziNyundo ya KufuaFuawe3
3
Cut and cool slowly
Cut and cool slowly
Cut the end square, or nick it and break it off after hardening to see the grain. Let the chisel cool slowly to relieve stresses from the forging.
Zana zinazohitajika:
Patasi ya moto4
4
Harden the edge
Harden the edge
Reheat about 3 inches back from the edge, the edge kept high in the fire. Lower the edge into clean water at about 70 °F, moving it, until about half the heated part is under; plunge briefly and lift out with heat left in the body.
Zana zinazohitajika:
Fua ya mhunzi
Ndoo ya kupoza chumaKoleo za mhunzi5
5
Temper
Temper
Polish the edge and watch the colours run down to it. When the edge is blue tinged with red, cool the chisel completely.
Zana zinazohitajika:
Kitambaa cha emeriNdoo ya kupoza chuma6
6
Grind
Grind
Grind the cutting edge to an angle of 60°.
Zana zinazohitajika:
Kisagia cha mezaVifaa
1- Kishikilia Nafasi
Zana Zinazohitajika
9- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
Mchoro huu unatengeneza
Blueprint zinazohusiana
Blueprint hizi zinashiriki maarifa — mbinu, vifaa au kanuni
CC0 Umma Wote
Mchoro huu umetolewa chini ya CC0. Uko huru kunakili, kubadilisha, kusambaza, na kutumia kazi hii kwa madhumuni yoyote, bila kuomba ruhusa.
Saidia Mtengenezaji kwa kununua bidhaa kupitia Mchoro wao ambapo wanapata Kamisheni ya Mtengenezaji iliyowekwa na Wachuuzi, au unda marudio mapya ya Mchoro huu na uiunganishe kama kiungo katika Mchoro wako kuchangia mapato.