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Shaping Metal
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Bending Metals can be bent in a vice or in folding bars Folding Bars
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Test Yourself Why should a card model of the ‘net’ be made?
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Test Yourself How can the edges of the tray be made safer?
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Test Yourself What advantages are there in using folding bars for bending the edge of a sheet of metal, instead of vice jaws?
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Test Yourself How can both the sides and ends of a box or tray be folded up?
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Test Yourself How can you avoid the edge of the sides becoming wavy?
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Press Forming A “die” is mounted inside a press and then a material (such as metal) is placed inside the die. The press then applies high pressure and the material is formed to match the shape of the die
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Blank | Die | Punch | Work Hardened https://www.youtube.com/watch?v=0oyL9JfG1GQ&feature=player_embedded
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Test Yourself What is the name given to the sheet of metal at the beginning of the process?
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Test Yourself Name the upper and lower parts
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Test Yourself What is the name of the machine that cut the metal blank?
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Test Yourself What also happens when the metal is stretched (on a molecular level)?
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Test Yourself What is a very important mechanical property of metals that will be press formed?
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Sand Casting The oldest form of casting involves pouring molten metal into a shaped hole made in damp sand and letting it cool.
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Sand Casting https://www.youtube.com/watch?v=szOwGvYO_Tc&feature=player_embedded
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Typical products
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Test Yourself
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Where is the molten metal poured?
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Test Yourself What is the purpose of the riser?
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Test Yourself Where is the molten metal poured?
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Test Yourself Explain why ‘draft’ is required on the sides of a pattern.
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Test Yourself Why is the moulding box made in two halves?
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Test Yourself Name five items or parts that can be found at home or on a car or cycle, that would be made by casting.
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Die Casting forcing molten metal under high pressure into a mould cavity.
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Die Cast Products
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Die Casting https://www.youtube.com/watch?v=bzSSfBgkWfc&feature=player_embedded
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Die Casting https://www.youtube.com/watch?v=WptzR_-o9aY&feature=player_embedded
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