The vibration of the CBN inserts during machining is caused by the following reasons:
1. The spindle bearing clearance is large, causing the spindle to jump; adjust the bearing clearance or replace the new bearing.
2. The workpiece is too rough, the surface is uneven, the cutting amount is large and small, the cutting force is large and small, so the vibration; firstly grinding the workpiece or processing once in advance.
3. The machine speed, the feed rate, the amount of cutting, the cutting force, these factors work together to match the natural vibration frequency of the machine. At this time, the entire machine will have a large vibration, and the shake of CBN inserts is also very fierce; change the amount of cutting.
4. The CBN tool elasticity, the clamping force of the tool holder, and the cutting force just form the frequency of the vibration, and also cause local vibration; Changing one of them can be eliminated.