Shot, devices, and installations for ultrasonic peening, and parts treated thereby
Shot for use in a peening installation, the shot having: hardness greater than or equal to 800 HV; density greater than or equal to 8 g/cm 3 ; and pieces having a maximum dimension less than or equal to 1.5 mm.
1. A method for treating a part comprising a hole, the hole extending along an axis, the method comprising:
forming a treatment chamber by:
inserting a deflector at least partially into the hole, the deflector comprising a surface having an angle oblique to the axis,
positioning a vibrating surface of a sonotrode outside and in proximity to the hole; and
projecting at least one piece of shot set in motion by the vibrating surface of the sonotrode toward the deflector.
2. A method according to claim 1 , wherein the hole is a through hole.
3. A method according to claim 1 , wherein the hole has a circular cross-section.
4. A method according to claim 1 , wherein the vibrating surface extends perpendicularly to the axis of the hole.
5. A method according to claim 1 , wherein the deflector is configured to direct the at least one piece of shot towards a surface associated with the hole.
6. A method according to claim 1 , wherein the deflector is of conical shape.
7. A method according to claim 1 , wherein the deflector is configured for reducing an angle of incidence of the at least one piece of shot against the surface of the hole.
8. A method according to claim 1 , wherein the hole is a blind hole.
9. A method according to claim 1 , wherein the hole is a tapped hole.
10. A method according to claim 1 , wherein the deflector is caused to move relative to the hole during treatment.
11. A method according to claim 1 , wherein the deflector is caused to rotate relative to the hole around the axis of the hole during treatment.
12. A method according to claim 1 , wherein the hole opens out on first and second opposite faces of a part to be treated, and wherein the treatment chamber extends over a portion of at least one of the first and second faces so as to expose the portion to the at least one piece of shot.
13. A method according to claim 12 , wherein the first and second faces are at least partially exposed to the at least one piece of shot.
14. A method according to claim 5 , wherein the deflector is fully inserted in the hole.
15. A method according to claim 1 , wherein the sonotrode is located in front of one end of the hole.
16. A method according to claim 1 , wherein the hole is located in a part having a flattened shape.
17. A method according to claim 16 , wherein the axis of the hole is perpendicular to a surface of the part.
18. A method according to claim 1 , wherein the at least one piece of shot has a hardness equal to or greater than 800 HV.
19. A method according to claim 1 , wherein the at least one piece of shot comprises tungsten carbide.