Abstract: During the coating of a component including cooling-air holes, it is necessary, when remachining the coated cooling-air holes, to determine the correct alignment of the cooling-air row. A process is provided in that at least two cooling-air holes are kept clear by a masking material during the coating and the alignment of the cooling-air row is effected on the basis of these two unclosed cooling-air hole.

Abstract: A process for making a hole into a substrate by at least one laser includes a first step which involves producing at least one intermediate hole with a diameter which is smaller than a final diameter of a final hole to be produced. The intermediate hole with the smaller diameter is a through-hole. The intermediate hole is produced by percussion process. The process further includes a second step which involves producing the final hole having the final diameter. The final hole is produced by machining the intermediate through-hole by a trepanning process so that the final diameter of the final hole is achieved.

Abstract: By means of laser triangulation measurements of an uncoated and a coated component having holes, the exact positions of the holes can be detected for reopening after coating. A method for the surface analysis of at least partially closed holes which are to be opened is provided. A process for reopening coated holes is also provided.

Abstract: A method for reprocessing a turbine blade having at least one platform which due to the action of corrosion is undersized on at least one lateral platform face is provided. According to the method, the target dimension of the platform is restored by applying material to the at least one lateral platform face such that, after the material application, the platform is oversized and then the platform is given the target dimension by machining the at least one lateral platform face. The material application is carried out with the material of an adhesion promoter layer.

Abstract: A process for determining the position of closed holes in a component is provided. By carrying out laser triangulation measurements on an uncoated component and a coated component with holes, the exact position of the holes to be reopened may be detected following the coating. A device used to carry out this process is also provided.

Abstract: A process for determining the position of closed holes in a component is provided. By carrying out laser triangulation measurements on an uncoated component and a coated component with holes, the exact position of the holes to be reopened may be detected following the coating. A device used to carry out this process is also provided.

Abstract: A method for determining the layer thickness of a component to be coated is provided. The monitoring of the process is automated by carrying out laser triangulation measurement before and after the coating of the component. At least one reference point on the component is used to determine the distortion of the blade or vane. A device for carrying out the method is also provided.

Abstract: A process using a single millisecond laser is presented. The process is traversed over the surface of a component a number of times. The tilt angle of the laser beam with respect to a drilling axis during a subsequent traverse is different from the tilt angle with respect to the drilling axis during the first traverse of the surface. By using the single millisecond laser which although producing rougher surfaces than other millisecond lasers has higher material-removal rates, repeated traverses using different process parameters allow millisecond lasers to be successfully used to produce smooth surfaces.

Abstract: A process for making a hole into a substrate by a laser is provided. According to the proposed process, in a first step, at least one intermediate hole is produced into the substrate by at least one laser, the intermediate hole having an intermediate diameter that is smaller than a final diameter of the hole to be made. In a second step, the hole having the final diameter is produced into the substrate by the at least one laser.

Abstract: During the coating of a component including cooling-air holes, it is necessary, when remachining the coated cooling-air holes, to determine the correct alignment of the cooling-air row. A process is provided in that at least two cooling-air holes are kept clear by a masking material during the coating and the alignment of the cooling-air row is effected on the basis of these two unclosed cooling-air hole.