Abstract: For the shot peening of a pipe inner wall of a curved workpiece (200) having a workpiece bore (201), use is made of a flexible blasting abrasive feed hose (10) having blasting nozzle head (20). The latter is guided through a supporting element (30) which is applied to one workpiece end (203). The blasting abrasive feed hose (10) together with the blasting nozzle head (20) is introduced into the workpiece bore (201) and advanced along a blasting treatment section therein, and subsequently retracted into the supporting element (30) again. The blasting abrasive is emitted during the advancing movement and/or during the retraction movement. A blasting nozzle unit (100) suitable for carrying out the method comprises a flexible blasting abrasive feed hose (10) and a blasting nozzle head (20) connected to the blasting abrasive feed hose (10). The blasting nozzle head (20) has a plurality of nozzle openings (21) distributed around the circumference.

Abstract: A working chamber system for the surface treatment of workpieces comprises at least one tightly closable work chamber (101), a frame-like workpiece holder (10, 20, 30) which is displaceable on a guide rail between a mounting position outside the work chamber (101) and a working position in the work chamber (101), and a manipulator which, as seen in plan view, is arranged next to a group of parallel guide rails within the work chamber (101). At least one of the workpiece holders (10, 20, 30) has an external frame (11, 21, 31), via which it is guided in the guide rails, and an internal frame (12, 22, 32) which is surrounded by the external frame (11, 21, 31) in a transporting position and which is displaceable into a position outside the main plane of the external frame (11, 21, 31) in the mounting position and/or the working position.

Abstract: For the shot peening of a pipe inner wall of a curved workpiece (200) having a workpiece bore (201), use is made of a flexible blasting abrasive feed hose (10) having blasting nozzle head (20). The latter is guided through a supporting element (30) which is applied to one workpiece end (203). The blasting abrasive feed hose (10) together with the blasting nozzle head (20) is introduced into the workpiece bore (201) and advanced along a blasting treatment section therein, and subsequently retracted into the supporting element (30) again. The blasting abrasive is emitted during the advancing movement and/or during the retraction movement. A blasting nozzle unit (100) suitable for carrying out the method comprises a flexible blasting abrasive feed hose (10) and a blasting nozzle head (20) connected to the blasting abrasive feed hose (10). The blasting nozzle head (20) has a plurality of nozzle openings (21) distributed around the circumference.

Abstract: A working chamber system for the surface treatment of workpieces comprises at least one tightly closable work chamber (101), a frame-like workpiece holder (10, 20, 30) which is displaceable on a guide rail between a mounting position outside the work chamber (101) and a working position in the work chamber (101), and a manipulator which, as seen in plan view, is arranged next to a group of parallel guide rails within the work chamber (101). At least one of the workpiece holders (10,20,30) has an external frame (11, 21, 31), via which it is guided in the guide rails, and an internal frame (12,, 22, 32) which is surrounded by the external frame (11, 21, 31) in a transporting position and which is displaceable into a position outside the main plane of the external frame (11, 21,31) in the mounting position and/or the working position.