Method and device for machining a part by abrasion

Abstract

The abrasion machining method according to the invention, for abrading a part that cannot be machined by conventional means, comprises the following steps: a pin is placed at a certain distance from the part to be machined, so that there is no contact between the part and the pin; the pin is driven so as to rotate; an abrasive liquid is injected between the rotating pin and the part in order to abrade the latter; and the pin is moved translationally along the part. Thanks to the method, the part may be machined precisely and reproducibly.

1 - A method of machining a part by abrasion, in which:
 a pin is placed at a certain distance from the part to be machined, so that there is no contact between the part and the pin;   the pin is driven so as to rotate about an axis; and   an abrasive liquid is injected between the rotating pin and the part in order to abrade the latter.   
     
     
         2 - The method as claimed in  claim 1 , wherein the pressure applied to the part is adapted by adjusting the distance between the pin and the part. 
     
     
         3 - The method as claimed in either of  claims 1  and  2 , wherein liquid is injected continuously during the process. 
     
     
         4 - The method as claimed in either of  claims 1  and  2 , wherein the abrasive liquid comprises a suspension of particles of an abrasive material. 
     
     
         5 - The method as claimed in  claim 4 , wherein, since the pin is formed from a material having a certain hardness and the part is formed from a material having a certain hardness, the abrasive material of the abrasive liquid has a hardness between the hardness of the pin and the hardness of the part. 
     
     
         6 - The method as claimed in either of  claims 1  and  2 , wherein the pin is also driven so as to move translationally along the part. 
     
     
         7 - The method as claimed in  claim 4 , wherein the pin is also driven so as to move translationally along the part. 
     
     
         8 - The method as claimed in  claim 5 , wherein the pin is also driven so as to move translationally along the part. 
     
     
         9 - The method as claimed in either of  claims 1  and  2 , which is applied to a part made of a ceramic matrix composite (CMC). 
     
     
         10 - The method as claimed in  claim 4 , which is applied to a part made of a ceramic matrix composite (CMC). 
     
     
         11 - The method as claimed in  claim 5 , which is applied to a part made of a ceramic matrix composite (CMC). 
     
     
         12 - The method as claimed in  claim 6 , which is applied to a part made of a ceramic matrix composite (CMC).