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| Cutting aluminium sheet stock with a box cutter |
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| IanB:
I think this works because aluminium is gets brittle and cracks very easily with bending. So much so that if you accidentally bend a piece of aluminium and then try to bend it back again it may crack before it gets back to the original shape. |
| MarkF:
Example video: However, we just used the standard blade. But he makes look much harder than it really is. |
| floobydust:
I've always used aviation snips. Curse when I need a left/straight/right curve cut and I don't have one. |
| KL27x:
MarkF's video shows what I described. You can see in the video that a curl of aluminum actually comes off the material and gets removed. If he wanted to, he could scrape all the way through the material. |
| KL27x:
--- Quote ---I think this works because aluminium is gets brittle and cracks very easily with bending. So much so that if you accidentally bend a piece of aluminium and then try to bend it back again it may crack before it gets back to the original shape. --- End quote --- Any rigid material can be scored and snapped, as long as you can score it. When you start with a uniform thickness of material you need just a relatively small score line to give it a place to fail. The area of elastic deformation is concentrated in one spot. And then you continue bending beyond that. And what happens next is inevitable. I score and snap thin steel plates... which are covered in diamond abrasive on one side. I score them with a router turning a carbide endmill to score the V groove. |
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