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TIL bumping my feed rate 15% on 6061 cut my cycle time by 4 minutes a part
Last month I was running a batch of 200 aluminum brackets on our Haas VF2 and getting chatter on the finish pass, so on a hunch I bumped the feed rate up 15% instead of slowing it down like I always did. The chatter went away and each part dropped from 11 minutes to 7, and the finish looked better than the slow passes I ran before. Has anyone else had luck speeding up instead of babying aluminum, or did I just get lucky with this setup?
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amyh2116d ago
The "cutter was rubbing instead of cutting" thing got me because I spent like two years slowing my feeds down every time I heard a weird noise, so basically I was just polishing aluminum with a $40 end mill. Now I'm worried I've been lucky this whole time and my setup is one long reach holder away from a snap. Guess I should actually look at the chip load chart instead of guessing like it's a video game.
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wade_perez16d ago
Did you check to see if the chip load was actually right before you made that change? Bumping feed on aluminum often "fixes" chatter because the cutter was rubbing instead of cutting, but the same 15% jump on a different tool or a longer reach holder can snap an end mill in a heartbeat. The result was real, just make sure you know which corner of the speed and feed chart you were sitting in before you run the next batch.
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