Patent ID: 7281446

Claim:
Machine tool ( 1 ) for machining by chip removal, comprising: a machining head ( 2 ) that operates while being positioned in a horizontal plane and is mounted on a vertical bed ( 3 ) to which said machining head discharges forces (F) by which said machining head is axially vibrated, said vertical bed ( 3 ) being pivotally connected to a supporting structure ( 4 ); a control device that continuously provides an electric current that is responsive to axial vibration of said machining head; and one or more bars ( 5 ) interposed between the vertical bed and the supporting structure, said one or more bars having an axial length (L) that is varied by magnetostriction produced by the electric current and that counteracts the axial vibration, thus keeping said machining head ( 2 ) fixed with respect to a workpiece ( 7 ) which it is machining.