METHOD FOR REDUCING THE DIAMETER OF AN OPENING
A method for reducing the diameter of an opening, including peening a perimeter of the opening. A method for correcting the permeability of a part including a plurality of openings for allowing a gaseous fluid to pass therethrough. The method identifies at least one opening with a diameter which exceeds a predetermined upper limit and reduces the excessive diameter by peening a perimeter of the opening.
1 - 11 . (canceled)
12 . A method for reducing a diameter of an opening, comprising:
peening a perimeter of the opening by a tool, a contact end of which is spherical or approximately spherical or frustoconical.
13 . The method as claimed in claim 12 , in which the peening is carried out with a tool centered over the opening.
14 . The method as claimed in claim 13 , in which a contact end of the tool comprises a ball.
15 . The method as claimed in claim 12 , in which the perimeter of the opening is metallic.
16 . The method as claimed in claim 12 , in which the perimeter of the opening is composed of a refractory alloy.
17 . The method as claimed in claim 12 , in which the diameter of the opening is between 0.5 and 3 mm.
18 . A method for correcting permeability of a component including a plurality of through-openings for gaseous fluid, the method comprising:
identifying at least one opening, the diameter of which exceeds a predetermined upper limit; and
reducing the excessive diameter by a method as claimed in claim 12 .
19 . The method as claimed in claim 18 , further comprising a prior operation of checking permeability of the component.
20 . The method as claimed in claim 18 , in which the openings are cooling openings.
21 . The method as claimed in claim 18 , in which the component is part of a gas turbine hot section.
22 . The method as claimed in claim 18 , in which the component is part of a combustion chamber.