US 11,667,005 B1
Method of making piston using polishing removal of thermal barrier coating (TBC) material
Kenth I Svensson, Peoria, IL (US)
Assigned to Caterpillar Inc., Peoria, IL (US)
Filed by Caterpillar Inc., Peoria, IL (US)
Filed on Apr. 27, 2022, as Appl. No. 17/730,576.
Int. Cl. B24B 49/00 (2012.01); B24B 19/10 (2006.01); F02F 3/02 (2006.01); F02F 3/26 (2006.01)
CPC B24B 19/10 (2013.01) [F02F 3/02 (2013.01); F02F 3/26 (2013.01); F02F 2200/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of making a piston comprising:
receiving a piston crown defining a center axis and including a combustion face having a bowl surface forming a combustion bowl and a center cone within the combustion bowl, an annular rim, and a bowl edge transitioning between the bowl surface and the annular rim, and the piston crown including a base material, and a thermal barrier coating (TBC) material forming at least a portion of the combustion face including the bowl edge;
advancing a polishing tool into contact with the combustion face;
spinning at least one of the polishing tool or the piston, such that a positive piston profile defined by at least a portion of the annular rim, the bowl edge, and at least a portion of the bowl surface, is polished via contact with a negative tool profile defined by a polishing face of the polishing tool; and
removing some of the TBC material based on the spinning at least one of the polishing tool or the piston.