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Iron Sheet Hammered Out from Bar
Before rolling mills, iron plate for cauldrons and griddles was hammered out of bar by hand. The bar is spread sideways with the hammer's peen, flattened with the face, then planished with a flatter until it is an even sheet two to three millimetres thick.
The picture: a cauldron of riveted iron plates from Vendel, Uppland, Sweden (Swedish History Museum, SHM 7250:XI).
Juu
A day
Maagizo
1
1
Heat the bar
Heat the bar
Bring the wrought iron bar to a bright yellow-orange.
Vifaa kwa hatua hii:
Ufito wa chuma kilichofuliwa1 kg
Mkaa1 as requiredZana zinazohitajika:
Fua ya mhunzi
Koleo za mhunzi
Glavu za kulehemu
Miwani ya usalama2
2
Spread it with the peen
Spread it with the peen
Strike with the cross peen running along the bar, so the grooves push the metal out sideways. Flatten the ridges with the face. Turn it over and repeat. Reheat as soon as it dulls.
Zana zinazohitajika:
Fuawe
Nyundo yenye kichwa cha msalabaKoleo za mhunziGlavu za kulehemuMiwani ya usalama3
3
Thin it evenly
Thin it evenly
Work outward from the middle, peen then face, until the plate is about 3 mm. Fold nothing: a fold will not weld back flat.
Zana zinazohitajika:
Fua ya mhunziFuaweNyundo yenye kichwa cha msalabaGlavu za kulehemuMiwani ya usalama4
4
Planish with a flatter
Planish with a flatter
With a helper on the sledge, set the flatter on the hot plate and planish the hammer marks out. Check it flat with a straight edge and the thickness with the caliper.
Zana zinazohitajika:
Kisawazishi cha uhunzi
Nyundo kubwaFuawe
Rula ya kunyoosha
Kipima-unene cha dijitali cha inchi 6Glavu za kulehemuMiwani ya usalama5
5
Trim the edges
Trim the edges
Cut ragged edges off with a cold chisel on the anvil while it is still warm.
Zana zinazohitajika:
Patasi ya chuma baridiFuaweNyundo yenye kichwa cha msalabaGlavu za kulehemuMiwani ya usalama6
6
How much sheet a bar gives
How much sheet a bar gives
Inapakia daftari la Jupyter…
Zana Zinazohitajika
11- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
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