Working with metal In Technology class, metalwork is likely to be limited to small items such as wire, small metal rods for axles, flat bars, round bars, square bars and lightweight metal sections. You are unlikely to need big metalwork machines and guillotines.
Types of metal
There are many different types of metal. You are most likely to work with iron, tin, steel, copper and alu- minium.
Forms of metal
Metals can be found in many forms. You will typically be working with: • copper wire: used as conductors • metal tubing: can be square or flat • sheet metals • metal rods
Holding metal
Metal often needs to be gripped firmly when it is being cut. There are a number of tools we use to hold metal tightly: • vice: usually fixed to a bench • vice grips: handheld grips that can be locked • G-clamp: available in a variety of sizes depending on the thickness, size and weight of the metal.
• combination pliers and needle nose pliers usually used to grip and pull metal parts that are secured firmly
Joining metal
Metals can be joined in a variety of ways: • bolting: a range of machine screws that are available in brass or iron
• riveting: using a pop riveter and pop rivets, or hammered rivets
• gluing: refer to adhesives sections for adhesives that can be used on with metal
• soldering: either using an electrical soldering iron or a gas flame
Safety
Working with metal can be very dangerous. The metals you will be using are good conductors of heat and become very hot when heated.
When metal is cut, it leaves a very sharp edge. Always fasten metal securely when cutting it. Ask an adult for assistance if you are uncertain.
Tools for Technology 161
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