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A lead guy told me to stop touching the feed knob mid cut and it stung
I was roughing out a batch of 4140 blanks and kept dialing the feed by feel because it sounded a little rough. The lead pulled me aside and said, "quit chasing the sound, your insert is breaking because your chip load is too low, not too high." I checked the book and he was right, I was running about 40 percent under where I should have been. Now I set the feed from the chart and leave it alone for the whole pass, and I have not chipped an insert in 3 weeks. How do you all handle it when a cut starts sounding off, do you adjust or just let it run?
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vera_green691d ago
The lead was right about the chip load being too low, but "leave it alone the whole pass" is the part I'd push back on. Sound is still info, it just isn't the thing you adjust by. If a cut starts sounding off mid pass, the move is to stop the feed, check your insert and your chip shape, then figure out if it's wear, a bad setup, or the material acting up. Running a chipped insert to the end of the pass because the chart said so just wrecks the part and the holder. Charts are a starting point, not a law.
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