Your letter about machining vibration

nº16 - november 2011

The topic of the month :
What is vibratory drilling ?

To remove chips in deep drilling, it is essential to use retreat cycles and to use efficient lubrication.

The principle of vibratory drilling is to create an axial oscillation to split the chip in small pieces, which are naturaly evacuated..

Two principles have been developped :

• Axial spring : self excited vibrations.
(Limitation : it is necessary to control all cutting parameters to avoid vibration stopping, which would bring a disaster, and also to avoid strong vibrations)

• Axial cam : drill's position is controled.
(Limitation : the cam must not be rotating with the drill.)

Vibration drilling is already widely applied in aerospace and in a variety of processes and materials.

News : Machinist calc

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Choose the next topic :
(click your choice)
(Survey closed)

• Gyroscopic effect in milling ?
• Active control of vibrations ?
• Suggest something else here.

Responses to the previous survey :
56% : « vibratory drilling »
44% : « active control »