Method of shot blasting and a machine for implementing such a method

A machine for shot peening at least one part comprising at least one thin wall defining two opposite main faces, said machine comprising:

• a device enabling at least one vibrating surface to be set into vibration;
• a device enabling said part to be rotated at least intermittently relative to said at least one vibrating surface;
• at least one chamber having a fixed structure enabling said at least one wall to be received for treatment;
• a clearance between the structure and the at least one part;
• and
• at least one vibrating surface looking into said chamber, said at least one vibrating surface being suitable for creating a cloud of projectiles in said at least one chamber.

A machine for shot peening a part comprising a plurality of vanes distributed angularly around a support that is designed to be rotated, each vane having two opposite faces, said machine comprising:

• at least one treatment chamber suitable for receiving at least one vane for treatment;
• a clearance between the vanes and the treatment chamber at least one vibrating surface looking into said chamber;
• a device enabling said at least one vibrating surface to be set into vibration;
• and
• a device enabling said part to be rotated at least intermittently relative to said at least one vibrating surface, said at least one vibrating surface being suitable for creating a cloud of projectiles in said at least one treatment chamber.

An apparatus for shot peening at least one part comprising at least one thin wall defining two opposite faces, comprising:

• means for causing at least one surface to vibrate in a treatment chamber comprising a fixed structure;
• a clearance between the wall and the fixed structure;
• and
• means for rotating said part at least intermittently, relative to said at least one vibrating surface, at least one of said faces being exposed to projectiles set into motion by means of said at least one vibrating surface.

An apparatus for shot peening a part comprising a plurality of vanes distributed angularly around a support that is designed to be rotated, each vane having two opposite faces, comprising:

• means for causing at least one surface comprising at least one sonotrode to vibrate in a treatment chamber comprising a fixed structure;
• a clearance between each vane and the fixed structure;
• and
• means for rotating said part, at least intermittently, relative to said at least one vibrating surface, at least one of the faces of at least one vane being exposed to projectiles set into motion by means of said at least one vibrating surface, the exposure of the part to projectiles being applied to only one portion of the part at a time, and regions of the part being exposed several times to the projectiles, with relative rotation taking place between said exposures.

An apparatus for shot peening at least one part comprising a plurality of walls each defining two opposite faces, comprising:

• means for causing said part to rotate at least intermittently relative to at least one vibrating surface set into vibration by a sonotrode, said faces of at least one of said walls being exposed to projectiles set into motion by means of said at least one vibrating surface;
• means for exposing each wall in succession to the projectiles in at least one treatment chamber designed to allow the walls to pass through during their treatment;
• and
• means for controlling an excitation of the sonotrode so as to increase the intensity of shot peening as the number of passes of the walls through the treatment chamber increases.

A method of shot peening at least one part having at least one edge liable to be damaged by impacts of projectiles, the method comprising:

• causing at least one surface to vibrate;
• rotating said part, at least intermittently, relative to said at least one vibrating surface, at least one face of the part being exposed to the projectiles set into motion by said at least one vibrating surface;
• and
• protecting the at least one edge by a protection element fitted on the part in contact with the at least one edge.

A method of shot peening at least one part having at least one edge liable to be damaged by impacts of projectiles, the method comprising:

• causing at least one surface to vibrate;
• rotating said part, at least intermittently, relative to said at least one vibrating surface, at least one face of the part being exposed to the projectiles set into motion by said at least one vibrating surface;
• and
• protecting the at least one edge by a protection element fitted on the part and spaced apart from the at least one edge to be protected.

A method of shot peening at least one part, comprising:

• causing at least one surface to vibrate in a treatment chamber;
• rotating said part, at least intermittently, relative to said at least one vibrating surface, at least one face of the part being exposed to projectiles set into motion by said at least one vibrating surface;
• and
• preventing the projectiles from leaving the treatment chamber by projecting at least one jet of compressed gas against the projectiles.

A method of shot peening at least one part comprising at least one wall defining two opposite faces, comprising:

• causing at least one surface to vibrate;
• rotating said part, at least intermittently, relative to said at least one vibrating surface, at least one of said faces being exposed to projectiles set into motion by the at least one vibrating surface;
• and
• marking the part by interposing a mask between the part and the projectiles, the mask having apertures corresponding to markings to be made.

A machine for shot peening at least one part, comprising:

• at least one vibrating surface;
• a drive to rotate said part at least intermittently relative to said at least one vibrating surface;
• at least one chamber enabling said at least one wall of said part to be received for treatment;
• and
• nozzles to direct jets of compressed gas against projectiles so as to prevent them from leaving the chamber.

A machine for shot peening at least one part, comprising:

• at least one vibrating surface;
• a drive to rotate at least intermittently said part relative to said at least one vibrating surface;
• and
• a casing defining a treatment chamber capable of being turned over relative to vibrating surface in order to treat two faces of a wall of said part in succession, wherein the casing houses two moving slides, between which the wall can be inserted, each slide being capable of being moved between a retracted position enabling projectiles to bounce against the vibrating surface and a closed position in which the slide closes the treatment chamber.

A machine for shot peening at least one part, comprising:

• a drive to rotate said at least one part at least intermittently around an axis of rotation;
• at least a first and second sonotrodes to cause at least a first and second surfaces to vibrate, the first and second sonotrodes having axes that are substantially parallel and that are offset angularly around the axis of rotation of the part;
• and
• projectiles for shot peening the at least one part by a movement induced by bouncing on at least one of the first and second surfaces.