US 11,951,594 B2
Polishing tool for narrow part, method of manufacturing polishing tool, polishing method, and method of manufacturing impeller
Kosei Kawahara, Hiroshima (JP)
Assigned to MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATION, Tokyo (JP)
Filed by MITSUBISHI HEAVY INDUSTRIES COMPRESSOR CORPORATION, Tokyo (JP)
Filed on Aug. 23, 2018, as Appl. No. 16/110,327.
Claims priority of application No. 2018-006052 (JP), filed on Jan. 18, 2018.
Prior Publication US 2019/0217445 A1, Jul. 18, 2019
Int. Cl. B24B 5/06 (2006.01); B24B 5/40 (2006.01); B24B 19/14 (2006.01); B24B 29/08 (2006.01); B24B 57/02 (2006.01); B24D 3/00 (2006.01); B24D 15/04 (2006.01); B24D 18/00 (2006.01)
CPC B24D 15/04 (2013.01) [B24B 5/06 (2013.01); B24B 5/40 (2013.01); B24B 19/14 (2013.01); B24B 29/08 (2013.01); B24B 57/02 (2013.01); B24D 3/002 (2013.01); B24D 3/004 (2013.01); B24D 18/009 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A method of manufacturing an impeller, the method comprising:
fabricating an impeller including a flow path; and
polishing a wall of the flow path of the impeller by sliding a polishing tool along the wall of the flow path of the impeller, the polishing tool comprising:
an abrasive retaining layer disposed on two or more non-coplanar sides of the polishing tool and that retains, on surfaces of the two or more sides of the polishing tool, an abrasive fluid in which abrasive grains are dispersed;
an elastic layer that is stacked on a rear side of the abrasive retaining layer;
a first abrasive flow path that:
is a hollow space inside a support supporting the abrasive retaining layer and the elastic layer, and
extends from a first end to a second end in a longitudinal direction of the polishing tool; and
second abrasive flow paths that extend from the first abrasive flow path to predetermined positions on a surface of the abrasive retaining layer opposite to the elastic layer, wherein, in each of the two or more sides of the polishing tool, one or more of the predetermined positions are disposed over the surface of the abrasive retaining layer,
wherein the polishing comprises:
pressing the abrasive fluid, retained on the surface of the abrasive retaining layer, against the wall of the impeller to polish the wall; and
polishing the wall with the abrasive retaining layer interposed between the elastic layer and the wall.