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