Annealing the stock has no guarantee of producing a "relaxed straight piece" of stock. If it comes back all crooked, then what?
The part would have to be clamped to some relatively massive straight edges during the anneal. I wonder if they would go to that much trouble for you?
You milling method might be inducing some stress, too. If you are taking a simple single pass, there could be some hammering effect on one side of the slot (because of "conventional" milling which is unavoidable in the first pass) that induces a stress skin. It might be worth a shot to mill the slot first with a smaller tool dia, and then finish with a perimeter pass that takes a few thousandths off each side in climb milling mode.
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(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)
Last edited by HuFlungDung; 09-23-2004 at 10:25 AM.
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