CHECKING DEVICE FOR CHECKING THE POSITION OF THE CENTRAL AXIS OF A MECHANICAL PART AND/OR OF A HOLE WITH ROTATIONAL SYMMETRY WITH RESPECT TO A REFERENCE SYSTEM

摘要

A checking device (9) for checking the position of a central axis (A) of a mechanical part with rotational symmetry includes a transducer (15) defining a motion transmission direction and a couple of arms (18,19) connected to the transducer and carrying feelers (12,13) movable along a checking section. The arms are connected to a support frame (10) by means of fulcra (16,17) defining two transverse rotation axes, only one of said rotation axis being arranged between the motion transmission direction and the checking section. The device can be applied to a system with a gauge to perform a method for checking the alignment between the axes of a cylindrical portion (3') and a frustoconical seat (5) of a hole (3). The method includes the steps of inserting the gauge into the hole and centering it in the frustoconical seat to define a reference system, tilting the gauge to locate it with respect to a section of the cylindrical portion of the hole, defining a longitudinal reference plane (P) and determining, at a different section of the cylindrical portion of the hole, the position of the central axis of the hole with respect to the longitudinal reference plane by means of the checking device.