UBUHANZI
UBWIZA N'UBUZIMA
UBUKORIKORI
UMUCO N'AMATEKA
IMYIDAGADURO
IBIDUKIKIJE
IBIRIBWA N'IBINYOBWA
UBWUBATSI BUSUBIRA INYUMA
UBUMENYI
SIPORO
IKORANABUHANGA
IBYAMBARWA
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).
Hejuru
A day
Amabwiriza
1
1
Heat the bar
Heat the bar
Bring the wrought iron bar to a bright yellow-orange.
Ibikoresho by'iyi ntambwe:
Umugozi w'icyuma cyacuzwe1 kg
Amakara1 as requiredIbikoresho bikenewe:
Uruganda rw'umucuzi
Amafashi y'umucuzi
Uturindantoki two gukomeza ibyuma
Amadarubindi y'umutekano2
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.
Ibikoresho bikenewe:
Ingoyi
Inyundo ifite umutwe utambitseAmafashi y'umucuziUturindantoki two gukomeza ibyumaAmadarubindi y'umutekano3
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.
Ibikoresho bikenewe:
Uruganda rw'umucuziIngoyiInyundo ifite umutwe utambitseUturindantoki two gukomeza ibyumaAmadarubindi y'umutekano4
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.
Ibikoresho bikenewe:
Igikoresho cy'umucuzi cyo kuringaniza
Inyundo niniIngoyi
Umurongo uringaniye
Ikigereranyo cya Digitale cy'Amasentimetero 6Uturindantoki two gukomeza ibyumaAmadarubindi y'umutekano5
5
Trim the edges
Trim the edges
Cut ragged edges off with a cold chisel on the anvil while it is still warm.
Ibikoresho bikenewe:
Ishoka ry'icyuma gikonjeIngoyiInyundo ifite umutwe utambitseUturindantoki two gukomeza ibyumaAmadarubindi y'umutekano6
6
How much sheet a bar gives
How much sheet a bar gives
Gupakira ikaye ya Jupyter…
Ibikoresho bikenewe
11- Umwanya
- Umwanya
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