Apparatus for the surface working of a workpiece as well as the use of the apparatus for the blasting of bore walls

Abstract

In accordance with the invention, an apparatus is provided for the surface working of a workpiece ( 2 ) by blasting with an abrasive blasting material ( 3 ), including a storage container ( 4 ) for the blasting material ( 3 ), a metering device ( 5 ) and a device for blasting ( 6 ). The device for blasting ( 6 ) has a blasting material feed ( 7 ) with an inlet ( 8 ) and an outlet ( 9 ) for the blasting material ( 3 ), the blasting material ( 3 ) being able to be fed to a jet region ( 10 ) through the blasting material feed ( 7 ) and the outlet ( 9 ). The device for blasting ( 6 ) furthermore includes a pressure supply ( 11 ) for the deflection of a blasting material flow ( 12 ) emerging from the outlet ( 9 ) by means of a pressure medium ( 13 ), with control means ( 14 ) for the introduction of the blasting material flow ( 12 ) being provided at the inlet of the blasting material feed ( 7 ).

1 . An apparatus for the surface working of a workpiece ( 2 ) by blasting with an abrasive blasting material ( 3 ), including a storage container ( 4 ) for the blasting material ( 3 ), a metering device ( 5 ) and a device for blasting ( 6 ), with the device for blasting ( 6 ) having a blasting material feed ( 7 ) with an inlet ( 8 ) and an outlet ( 9 ) for the blasting material ( 3 ), and the blasting material ( 3 ) being able to be fed to a jet region ( 10 ) through the blasting material feed ( 7 ) and the outlet ( 9 ), as well as with a pressure supply ( 11 ) for the deflection of a blasting material flow ( 12 ) emerging from the outlet ( 9 ) by means of a pressure medium ( 13 ), characterised in that control means ( 14 ) for the introduction of the blasting material flow ( 12 ) are provided at the inlet of the blasting material feed ( 7 ).  
     
     
         2 . An apparatus in accordance with  claim 1 , wherein the control means ( 14 ) include the metering device ( 5 ).  
     
     
         3 . An apparatus in accordance with  claim 1  or  claim 2 , wherein the control means ( 14 ) include an injector nozzle ( 141 ).  
     
     
         4 . An apparatus in accordance with any one of the preceding claims, wherein the metering device ( 5 ) is arranged at the storage container ( 4 ).  
     
     
         5 . An apparatus in accordance with any one of the preceding claims, wherein the metering device ( 5 ) is connected to the blasting material feed ( 7 ) by means of a connection line ( 16 ).  
     
     
         6 . An apparatus in accordance with any one of the preceding claims, wherein a flowmeter ( 15 ) is provided for the measurement of a mass flow of the blasting material ( 3 ).  
     
     
         7 . An apparatus in accordance with any one of the preceding claims, wherein the pressure supply ( 11 ) has, in the jet region ( 10 ), an endpiece ( 71 ) which deflects the pressure medium ( 13 ) and has an opening ( 72 ) and the pressure supply ( 11 ) is rotatably arranged about a longitudinal axis (L) of the blasting material feed ( 7 ), with the opening ( 72 ) of the endpiece ( 71 ) of the pressure supply ( 11 ) being arranged and alignable such that the blasting material flow ( 12 ) emerging from the outlet ( 9 ) of the blasting material feed ( 7 ) can be deflected.  
     
     
         8 . An apparatus in accordance with  claim 7 , wherein the pressure supply ( 11 ) is rotatable by a rotary drive ( 17 ) about the longitudinal axis (L) of the blasting material feed ( 7 ).  
     
     
         9 . An apparatus in accordance with any one of the preceding claims, wherein a freely programmable control unit is provided for the control and/or regulation of the metering device ( 5 ) and/or of the control means ( 14 ) for the introduction of the blasting material flow ( 12 ) and/or of the rotary drive ( 17 ).  
     
     
         10 . Use of the apparatus ( 1 ) in accordance with any one of the preceding claims for the blasting of bore walls or tube walls, in particular of cylinders of reciprocating combustion engines.