Patent ID: 7509896

Claim:
A process for in situ machining of the peripheral surface of a rotating part, such as the commutator or slip-ring of an electric motor, which rotating part rotates about an axis (XXâ€²) and which is fixed to a stationary frame, said process comprising; securing a machining tool having a cutting part mounted for movement on a tool holder plate to said stationary frame, moving said tool along an in-feed line (YYâ€²) substantially perpendicular to the axis (XXâ€²) toward said part to be machined, said tool also moving pivotally about an axis (ZZâ€²) which is substantially perpendicular to the line (YYâ€²) and axis (XXâ€²), wherein, by combining rotation of the tool around the ZZâ€² direction and translational movement along the in-feed line (YYâ€²) of the center of rotation around axis (ZZâ€²), the machining tool is displaced in a plane perpendicular to the axis (ZZâ€²) such that the trajectory of the cutting part includes at least one straight part parallel to the axis (XXâ€²) of rotation.