Machsupport Forum
G-Code, CAD, and CAM => G-Code, CAD, and CAM discussions => Topic started by: michel-cnc on March 09, 2012, 01:21:48 PM
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Hello,
I have some difficulties to mill alloy because it seems that alloy is much more crushed or forged than cut.
I use a mill tool diameter=3.17mm; Speed 6000 RPM & F50; depth=0.8mm (0.5 for finish pass).
So, machine chips are not cut and after few time of milling stops the spindle (too much efforts - 700w spindle);
as the machine continue to move, the tool can break.
The machine has also a lot of vibrations and the tool makes a lot of noise.
I join a picture of the (bad) result.
Did you have experienced the same thing ?
May be i will be more inspired to try an other material; what is the kind of white material i can see sometimes - is it nylon ?
What do you use as synthetic material ?
Thank you for reading !
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Looks like 5052 or some other soft alloy. They don't machine well. Only way to successfully machine this stuff is using heavy flood coolant with fair oil concentration or Tapmatic cutting oil .
Aluminium alloys with excellent machinability are 6061, 2024, 7075. 6061 being the most common. Also, your feed is way too low. Assuming a 3-flute end mill you'd want to feed it around 350mm/min at that spindle speed.
Dan
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Spindle is too fast for feedspeeds OR feedspeeds too slow for spindle speed. You are melting the alum not cutting it.
(;-) TP