CORRECTING METHOD AND DEVICE FOR DEFECT OF PORE

摘要

PROBLEM TO BE SOLVED: To improve yield by correcting a defect of a pore generated in a pore worked product. SOLUTION: When the defect of the pore smaller than a normal hole in at least one of depth and diameter existing in a round through hole formed in the pore worked product is corrected, a file 26 with a shaft having a file part 26A round at its distal end is prepared and the file part 26A of the file 26 with the shaft faces the defect of the pore. After a center of the defect of the pore and the axis of the file 26 with the shaft are made to coincide each other, the file part 26A performs grinding by being advanced from a grinding side surface of the pore worked product up to a prescribed depth, while rotating the file 26 with the shaft around the axis.