Patent ID: 11913086
Assignee: SAFRAN AIRCRAFT ENGINES
Field: Measurement (Instruments)
Classification: CPC B  C  F  G | IPC B  C  G

Claim 0:
1. A method for relieving residual stresses in a part by rotating said part, the method for relieving stresses comprising a step of increasing a rotation speed and a step of decreasing the rotation speed, wherein the step of increasing the rotation speed comprises:
a first sub-step consisting in measuring, at a first given instant, a first value representative of the rotation speed of said part and a first value presentative of the a radial enlargement of said part at said first instant;
a second sub-step consisting in measuring, at a second given instant after the first instant, a second value representative of the rotation speed of said part and a second value representative of the radial enlargement of said part, at said second instant;
a third sub-step consisting in determining a leading coefficient of a first affine function from said first value representative of the rotation speed of said part and the first value representative of the radial enlargement of said part at said first instant and from said second value representative of the rotation speed of said part and said second value representative of the radial enlargement of said part, at said second instant,
a fourth sub-step consisting in determining a target radial enlargement value of said part as a function of a value representative of the rotation speed, in the form of a second affine function, an origin of which is the value of a de sired final residual enlargement and the leading coefficient of which is said leading coefficient of said first affine function determined during the third sub-step,
a fifth sub-step of stopping the an increase in the rotation speed of said part from the moment that the actual enlargement of said rotating part corresponds to said target relative radial enlargement value determined during the preceding sub-step.