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Subject: Surface finnish (need a bad one)

Date: 07/16/01 at 5:27 PM
Posted by: Andy Pettican
E-mail: apettican@jlfrench.com
Message Posted:

Hi All
My problem is drawing calls for a RA of between 2 and 10 and ive got 0.16. I am machining a pressure die cast part material is LM20 Aluminium. Cutter is a 125mm dia 6 tips face mill. My present cutting data is 10000 RPM and 20000 mm/min table feed or 780" per min.Depth of cut is 1,5mm approx. I need to maintain high feed rates to keep within cycle time. The present tip radius is 0.8mm would a smaller rad help? If i set 1 tip slightly high would this help without decreasing tip life to much.
Any thoughts on this subject would be most welcome.

Thanks for taking the time to read this



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