A device for measuring the residual stresses in a rim of one wheel of a railway wheelset having two wheels each resting upon a horizontal rail, said device comprising:
- the rail for supporting the wheel,
- a mechanism for lifting and supporting a chassis, said lifting and supporting mechanism resting upon a substantially horizontal surface situated at a level lower than the rail and having a plurality of substantially vertically extending parts arranged under the rail, wherein said chassis comprises a horizontal chassis mounted on the mechanism for lifting and supporting so as to be adjustable in height on the vertical parts,
- two sets of slides fixed to the chassis in a direction parallel to the rail and wherein one of said sets of slides is on one side of the plane of symmetry of the rail and the other said sets of slides is on the other side of the plane of symmetry of the rail,
- a carriage mounted to move translationally on each one of said sets of slides,
- a mechanism for translationally displacing each said carriage on said slides,
- a grinding device mounted on each said carriage for moving in a direction perpendicular to the slides at a level for allowing the grinding device to grind the rim of the wheel,
- a mechanism for displacing each said grinding device towards and away from the wheel,
- an ultrasound checking device mounted to move translationally on one of the two carriages in a direction perpendicular to the slides,
- a mechanism for displacing the ultrasound checking device between a service position in contact with the rim to measure the residual stresses in the rim of the wheel and a position withdrawn from the rim,
- a position detector mounted on each said carriage for moving in a direction perpendicular to the slides,
- a mechanism for displacing each said detector between a non-obstructing position and a position bearing against the rim of the wheel, each said detector located facing one another to measure the thickness of the rim.