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Unread 11-05-2010, 16:12
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Re: pic: 3 Hour Chassis + 2 Hours

Quote:
Originally Posted by Ty Tremblay View Post
I intend to weld the cross beams to the inner plates. Our team has a CNC mill, but it doesn't have a coolant system built in, thus milling operations can be quite cumbersome. By designing it this way, the only CNC operation necessary is the drilling of the holes so everything lines up square. The rest of the dimensions are more or less non-critical and can be cut with some careful band sawing.
I do a fair amount of aluminum machining dry without too much argument... what sort of tooling are you using? Are you making nice aggressive cuts to keep heat in the chip?

I've had good luck with carbide tooling and heavy feeds on 6, 2, and 7 series alloys.

I assume because you're planning on welding it you're going to use a 5 series alloy, which has a "poor" machinability rating, which may well be your problem.
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