Tungsten Carbide End Mill Vibration

Details: Category: Tungsten Information; Published on Monday, 27 October 2014 18:47

Between the tungsten carbide end mill and the tool-holder, there exists small gap, which may result in vibration during machining. This phenomenon may cause uneven engagement of the circular blade of end mills, and increasing of cutting expansion to a value that is higher than the one set originally, and therefore the machining precision and service life of tungsten carbide end mills will be affected. However, when the groove width is too small, tool vibration can be achieved on purpose to increase cutting expansion, through which the groove width needed can be obtained. However, maximum amplitude should be restricted under 0.02mm, or it will not achieve stable cutting performance. Of course, during normal machining, it is better to have smaller end mill vibration.

When tungsten carbide end mill vibration occurs, operators should consider lowering the cutting speed and feeding speed. If there is still great vibration after both of them being lowered, then the reducing of cutting expansion should be considered.

If there is sympathetic vibration in machining system, it may be because that the cutting speed is too high, or the feeding speed is too low, or the cutter system lacks rigidity, or the clamping force is inefficient, etc. Therefore, when this happens, the countermeasures like cutting parameters adjustment, increasing cutter system rigidity and increasing feeding speed should be adopted.