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METALS - Coggle Diagram
METALS
Are substances from minerals which contain one or more metallic elements, and sometimes non-metallic substances such as carbon.
CLASSIFYING METALS
Depending where they are from, metals can be classified as ferrous or non-ferrous
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MARKING, CUTTING AND FINISHING TECHNIQUES
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CUTTING
Used to cut soft, flexible, thin sheets of metal. It can cut in straight, angled or curved lines.
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SHAPING
CHISEL
This tool has a double-sided sharp edge. It's used to shape metal by hitting the handle with a hammer and holding it at a 5º angle.
EXTRUSION
The heated metal is pushed through a hole by a piston, using compression.
FORGING
The metal piece is shaped by repeated and continuous compression forces using hammers, tongs and anvils.
PRESS FORGING
The heated metal is placed between two dies, one fixed and the other mobile. The dies are the shape of the object we want to make. They are pressed together so that the piece takes the shape of the die.
PUNCHING
This is a cold forging process: a sheet of metal is hit with a punch to make the required shape in a mould.
FINISHING
GRINDING
A grinder is used to refine surfaces to precise, accurate dimensions and to remove any imperfections. We can use it on flat pieces or cylinders.
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POLISHING
This technique produces a shine, using a polishing wheel with revolving, abrasive wheels or strips.
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