Twisting Metal

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Forgework
Twisting Metal
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Pupils should be aware of the following hazards
1. Care should be taken when carrying hot metals
(particularly metals at black heat that may not
appear hot) 2. Clay bricks should not be heated
as they can disintegrate violently. 3. Ceramic
chips remain hot for a considerable time after
the heat source has been removed. 4. Foreign
materials present in the forge can cause fumes.
Stones can explode. 5. Quenching of hot
materials, particularly tubular components can
cause risk of scalding. 6. Fuel combustion can
produce dangerous gasses.
Conditions of use. Appropriate safety equipment
must be worn Goggles, Leather gloves. (Leather
apron where appropriate)
The Forge
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Canopy
Spark
Hearth
Brazing Torch
Fire Bricks
Ceramic Chips
Spark Ignition switch
Blacksmiths Tongs
On / Off Switch
Isolating Switch
The Forge
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Stage 1
Use a Hacksaw to cut your piece of steel bar to
length
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Stage 2
File both ends of the bar square.
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Stage 3
Use a Centre Punch to mark the beginning and end
of the area to be twisted
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Stage 4
Leather Gloves
Goggles
Put on safety equipment
Leather Apron
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Stage 5
Get you teacher to switch on the forge. (wait
about 10 min for ceramic chips to heat up)
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! Remember to keep a close eye on the steel if
you let it overheat it will melt
Stage 6
Push the steel bar into the hot chips and let the
bar heat up. (This should take about 1 min)
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Stage 7
Using Blacksmiths Tongs lift the hot steel and
grip it in the Leg Vice
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Stage 8
Fit the twisting wrench over the hot bar and
twist (note the centre punch marks)
Twisting Wrench
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Stage 9
If you want to obtain similar twists on 2 or more
items care must be taken to heat each piece to a
similar temperature.
The bar can be twisted ¼, ½, ¾, 1,2 turns etc
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Stage 10
Use Blacksmiths Tongs to carry the hot bar to the
sink and quench the steel.
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The End