I get a peak at 240 Hz in FFT plot of tool vibration. The accelerometr is placed at 45 mm from tool tip during machining. Turning of nickel steel of dia 60 mm and length 300 mm at spindle speed 256 RPM. PCLNR2020K tool holder. Panther conventional precision lathe it is.
240 Hz is in the audible range. Do you hear any sound while your spindel is rotating? Perharps, it is friction-induced sound, because, for example, spindel is not well oiled.
i think you should also measure the sound pressure and check the FFT of sound pressure
1. You should find peak at 4.26 Hz. the peak is due to your spindle speed.
2. What is your feed rate ?
Find cutting speed and angular velocity in rpm and convert it to hz its possible one of the frequency will match the 240 hz.
Other way is to find through experimental model analysis
- Badges
- Science topic
- Similar topics
- Mathematical Sciences
- Graphs