How can we increase the productivity in low speed milling of Titanium, Inconel and Stainless steel alloys?
The spindle speed may be very low when you use cutters with large diameters. The useful stability lobe will depend on which natural frequency is causing the chatter vibrations.rnrnWe recommend the following: rnrn1- Tap test the cutter on the machine. If the workpiece is flexible, tap test it as well.rnrn2- Using MALDAQ, measure the vibrations during machining using an accelerometer attached to the spindle headstock or with a microphone. Take FFT, and check the frequency corresponding the highest peak. There may be some high peaks at the spindle speed (rev/sec) and tooth passing frequency (no. of teeth times spindle speed), and their integer multiples. These are forced vibrations in most cases, and you can neglect them. The chatter will occur close to one of the natural frequencies measured with the tap test.rnrn3- If you use a large diameter cutter and low speed, the chatter will cause by low frequency modes of the machine (spindle, spindle housing). If the diameter is small and speed
