Vibratory machining device

Machining device comprising a casing, a transmission shaft that extends along an axis and is able to be coupled to a cutting tool, and a drive mechanism for driving the transmission shaft, said mechanism comprising a first gearing member that is coupled to the transmission shaft and is able to drive the transmission shaft rotationally about its axis with respect to the casing, a second gearing member that is in a helicoidal connection with the transmission shaft and is able to drive the transmission shaft translationally along its axis in a feed movement with respect to the casing, depending on the relative rotational speed of said first and second gearing members, and means for generating axial oscillations that are able to generate an oscillating feed movement of the transmission shaft along its axis, characterized in that said second gearing member is able to move translationally along the axis with respect to said casing, said means for generating axial oscillations comprising an electromechanical actuator mounted at a fixed location, connected to said casing, said electromechanical actuator being able to be coupled axially to said second gearing member in order to make it oscillate translationally, so as to superimpose an axial oscillation component on said feed movement.