Thread: Cutting Carbon Fibre
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11-04-2012 #1
Do any of you have experience milling carbon fibre pultrusions? I'm thinking about this 10mm box section, and would like to do some mitres and bits. I know it is very stiff, but is it also very hard? Any tips I might need to know? What does it compare to for difficultly in milling; plastics, aluminium, steel?
Cheers!
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11-04-2012 #2
It's immensely abrasive, shags cutters up like no tomorrow, carbide included.
I think the pro's use diamond coated tooling for it.John S -
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11-04-2012 #3
Does that make me a pro
I've cut carbon fibre sheet lots of times. By far the best cutter I found is those cylindrical diamond coated cutters you find in rotary tool kits:
http://www.ebay.co.uk/sch/i.html?_tr...&_sop=15&_sc=1
Here's a video of one of these cutting:
[Ok can't find that, will post when I have]
E.g:
It's a bit slow (300mm/min @24000rpm if I recall correctly), but the cutters last a long time and since it's effectively a grinding process the finish is excellent.
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01-05-2012 #4
A chap who does alot with this stuff told me it kills electric spindles very quickly? The 'dust' being very effective at destroying electrical bits....? Anyone had experience of this?
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02-05-2012 #5
What sort of spindle is there other than electric? Steam?
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02-05-2012 #6
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03-05-2012 #7
Ahh I see. He probably has a good point, I'll try to avoid letting the dust get about. I'll be using a water-cooled spindle anyway.
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18-05-2012 #8
Good night:
To cut carbon fiber with a perfect finish, watch the video.
Spindle speed 9250 rpm ...
Feed Rate ..... 920 mm / m
Rate Plunge ..... 550 mm / m
Two blade .... End Mill 3 mm
Carbon Fiber .... Thickness .... 1.5 mm
http://youtu.be/kYVxcjTuMeg
Good Works.
António Pinho
http://arteemcnc.blogspot.pt/
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18-05-2012 #9
Did you find the end-mill became blunt quickly? Was it an uncoated endmill?
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