Method and device for treating the surface of a part

Abstract

The invention relates to a process for the surface treatment of a component ( 1 ) having a curved component surface ( 3 ). Material is removed from the component surface ( 3 ) along a contour line ( 9 ) on the component surface ( 3 ) by means of a particle jet ( 7 ) which is generated from a particle source ( 5 ). At least one of the jet parameters is matched to the contour line ( 9 ) in such a way that a desired, in particular homogeneous surface roughness is established along the contour line ( 9 ). The invention also relates to a blasting installation ( 47 ) for the automated surface treatment of a component ( 1 ).

What is claimed is:  
     
         1 . A method for the surface treatment of a component ( 1 ) having a curved component surface ( 3 ), comprising: 
 removing material from the component surface ( 3 ) along a contour line on the component surface ( 3 ) with a particle jet ( 7 ) that is generated from a particle source ( 5 ), the particle jet having a blasting distance (d), a blasting intensity, a blasting angle (α) and a blasting time, the particle jet characterized in that at least one of the distance, intensity, angle and time is matched to the contour line in such a way that a homogeneous surface roughness is established along the contour line.    
     
     
         2 . The method as claimed in  claim 1 , wherein the matching of the jet parameters takes place automatically.  
     
     
         3 . The method as claimed in  claim 1 , wherein the particle source ( 5 ) and the component ( 1 ) are moved relative to one another.  
     
     
         4 . The method as claimed in  claim 1 , wherein the particle source ( 5 ) is moved relative to the component ( 1 ) in such a way that the blasting distance (d) is constant.  
     
     
         5 . The method as claimed in  claim 1 , wherein the particle source ( 5 ) is moved relative to the component ( 1 ) in such a way that the blasting angle (α) is constant.  
     
     
         6 . The method as claimed in  claim 1 , wherein the component ( 1 ) has a base body ( 11 ) with a base material ( 13 ), the base body ( 11 ) having the component surface ( 3 ) which, for a first coating ( 15 ) to be applied to the base body ( 11 ), is treated with a first coating material ( 17 ).  
     
     
         7 . The method as claimed in  claim 6 , wherein the first coating material ( 17 ) used is an MCrAlX alloy, where M represents one or more elements comprising iron, cobalt and nickel, Cr represents chromium, Al represents aluminum and X represents one or more elements selected from the group consisting of yttrium, rhenium and the rare earths.  
     
     
         8 . The method as claimed in  claim 6 , wherein the first coating ( 15 ) also has the component surface ( 3 ) which, for a second coating ( 19 ) to be applied to the component ( 1 ), is treated with a second coating material ( 21 ).  
     
     
         9 . The method as claimed in  claim 1 , wherein the component ( 1 ) has a base body ( 11 ) with a base material ( 13 ), a first coating ( 15 ) comprising a first coating material ( 17 ) being applied to the base body ( 11 ), and the coated component ( 1 ), for a second coating ( 19 ) to be applied to the component ( 1 ), being treated with a second coating material ( 21 ).  
     
     
         10 . The method as claimed in  claim 8 , wherein, in the coating process, a ceramic is used as the second coating material ( 21 ).  
     
     
         11 . The method as claimed in  claim 1 , wherein the component ( 1 ) is designed for a hot gas to flow around it.  
     
     
         12 . The method as claimed in  claim 1 , wherein the component ( 1 ) used is a turbine rotor blade ( 23 ), a turbine guide vane or a heat shield element ( 25 ) of a combustion chamber.  
     
     
         13 . The method as claimed in  claim 1 , wherein the blasting angle (α) on the component surface ( 3 ) is approximately 20° to 90°.  
     
     
         14 . The method as claimed in  claim 13 , wherein the blasting angle (α) on the component surface ( 3 ) is approximately 50° to 90°.  
     
     
         15 . A blasting installation ( 47 ) for automated surface treatment of a component ( 1 ) having a curved component surface ( 3 ), comprising: a particle source ( 5 ) for generating a particle jet ( 7 ), and a component holder ( 49 ) for holding the component ( 1 ), the particle source ( 5 ) and the component ( 1 ) being movable relative to one another in such a way that, to produce a homogeneous component surface ( 3 ) in a blasting process using the particle jet ( 17 ), the blasting distance (d) and/or the blasting angle (α) adopts a predetermined, in particular constant value along a contour line on the component surface ( 3 ).  
     
     
         16 . The method as claimed in  claim 15 , wherein the blasting angle (α) on the component surface ( 3 ) is approximately 20° to 90°.  
     
     
         17 . The method as claimed in  claim 16 , wherein the blasting angle (α) on the component surface ( 3 ) is approximately 50° to 90°.  
     
     
         18 . A method for surface treating a component ( 1 ) of a gas turbine having a curved surface ( 3 ), comprising: 
 removing material from the component surface ( 3 ) along a contour line on the component surface ( 3 ) using a particle jet ( 7 ) from a particle source ( 5 ) having blasting angle (α) of approximately 20° to 90°, a blasting distance (d), a blasting intensity, and a blasting time,    wherein at least one of the distance, intensity, angle and time of the particle jet ( 7 ) is matched to the contour line to establish a homogeneous surface roughness along the contour line.    
     
     
         19 . The method as claimed in  claim 18 , wherein the particle source ( 5 ) is moved relative to the component ( 1 ) in such a way that the blasting distance (d) is constant.  
     
     
         20 . The method as claimed in  claim 18 , wherein the particle source ( 5 ) is moved relative to the component ( 1 ) in such a way that the blasting angle (α) is constant.