Patent ID: 8980372
Filing Date: 2015-03-17
Classification: C23C,F01D,F05D,Y02T

Abstract:
1. A process for opening a plurality of cooling-air holes of cooling-air rows in a component, comprising: providing only a topmost and a bottommost hole in a row of more than the topmost and the bottommost holes with a masking material before the coating, wherein the topmost and the bottommost holes are not coated or are scarcely coated during a coating within the topmost and bottommost holes; coating the component including a plurality of open cooling-air holes in the row and the two uncoated masked holes wherein the plurality of open cooling-air holes are completely filled with coating and thus completely closed; removing the masking material from the two uncoated masked holes after the coating; aligning the two uncoated masked holes with respect to a line between the two holes after the coating; and reopening the plurality of coated open cooling-air holes by a machining machine using the alignment, wherein an actual alignment of all holes arranged in the row of holes is determined by the line between the two uncoated masked holes, which are not coated during the coating, in the row of holes, in order to determine a position of the coated open cooling-air holes.