Device for the nondestructive test of a part
View Patent ↗An eddy current testing to detect defects at the surface or at shallow depth in a blade root for an airplane engine fan is provided. The device includes a probe containing a sensor, the probe being hinge-mounted to the end of a handle, a guide presenting a reference surface, and a mechanism for adjusting the position of the guide parallel to an axis of the handle.
1. A device for non-destructive testing of a part by moving a sensor over a portion to be scanned, the device comprising:
a probe including the sensor, the probe being hinge-mounted at an end of a handle; and
a guide presenting a reference surface,
wherein a position of the guide is adjustable relative to the probe and to the handle in a direction parallel to an axis of the handle, and
wherein the guide is generally in a form of a sleeve that is coaxial with the handle from which the probe emerges, one end of the sleeve presenting an annular front face constituting the reference surface.
2. The device according to claim 1 , wherein the probe is hinge-mounted to a support to be configured to pivot about an axis perpendicular to the axis of the handle, the support being installed in the sleeve at one end of the handle.
3. The device according to claim 1 , wherein the handle includes a threaded segment having mounted thereon a nut that is secured to the sleeve.
4. The device according to claim 3 , wherein the threaded segment is tubular.
5. The device according to claim 4 , wherein an inside wall of the tubular threaded segment is lined with a tube projecting into the sleeve and constituting a portion of the support.
6. The device according to claim 5 , wherein the tube constitutes a duct for passing electric wires, the electric wires being connected to the sensor of the probe.
7. The device according to claim 1 , wherein the sensor is an eddy current sensor.
8. The device according to claim 1 , wherein the guide and the probe are respectively shaped to come into contact with an inner radial surface of a blade root and with an adjacent outer radial surface of the blade root.
9. The device according to claim 1 , wherein the handle is screwable such that screwing the handle in or out adjusts a position of the probe relative to the reference surface.
10. The device according to claim 9 , wherein the sleeve forming the guide includes a rear skirt overlapping a cylindrical portion of the handle, and the position of the probe relative to the reference surface is measured by movement of the rear skirt facing the handle.