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Old 02-23-2018, 08:10 PM
jason harman jason harman is offline
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Default A question on shaping an aluminium curve

i have been approached to make an aluminium piece for the top of a large sign,
there is a buck and some rolled alumium pieces as below:



i have a deep shrinker/stretcher, english wheel and air operated planishing hammer,i havent had them for very long though,
i'm a tradesman boilermaker but a real beginner at the metal shaping of light gauge stuff.

the sign is supposed to look like an aeroplane wing, about 16 metres high, my job is to replicate the wing tip using the buck as a guide,

i wondered if anyone had any advice for the best way to go about it, the material is 5005 1.5mm alu.

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Old 02-23-2018, 08:17 PM
steve.murphy steve.murphy is offline
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Looks interesting, are you trying to make from one or multiple pieces?
If multiple how do you plan on joining or attaching them (ie welding or rivets)
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Old 02-23-2018, 08:29 PM
jason harman jason harman is offline
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Steve, i have asked for it to be in two pieces, as i thought that would be easier,

that is two parts end to end not split down the centreline.

they will be swaged and riveted together
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Old 02-23-2018, 09:12 PM
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Steve Hamilton Steve Hamilton is offline
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It may not look like it but there is a lot of shape in that panel.

Even for power equipment that would be a challenge.

I would make it in 4 parts.

Steve
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Old 02-23-2018, 09:27 PM
jason harman jason harman is offline
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thanks Steve,duly noted
he said i can make it in as many parts as i want,
if it makes it easier,
i'll get a couple of extras to practice on too
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Old 02-23-2018, 11:20 PM
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Steve Hamilton Steve Hamilton is offline
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Jason

If you make a paper pattern from the buck it will show that the blank that you need to start with is no a rectangle that is rolled, but an arc that is flat.

As you shrink the long edges and stretch the middle the panel will develop.

Steve
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