METHOD AND DEVICE FOR MACHINING A PART BY ABRASION

• US 20110003535A1
• Filed: 07/02/2010
• Published: 01/06/2011
• Est. Priority Date: 07/03/2009
• Status: Abandoned Application

• Current Assignee: Snecma (Safran SA)
• Original Assignee: Snecma (Safran SA)
• Inventors: PEREZ-DUARTE, Alexis
• Application Number:
  US12/829,796
• Publication Number:
  US 20110003535A1
• Time in Patent Office: Days
• US Class Current: 451/36
• CPC Class Codes: B24B 1/00 Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
• CPC Class Codes: B24B 19/009 for grinding profiled workpieces using a profiled grinding tool
• CPC Class Codes: B24B 19/14 for grinding turbine blades, propeller blades or the like using grinding belts B24B21/16
• CPC Class Codes: B24B 37/00 Lapping machines or devices; Accessories B24B3/00 takes precedence

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.

Claims

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).