A method of solidifying blasting a pipe inner wall of a curved workpiece with a workpiece bore and jet nozzle unit and working chamber system therefor

摘要

A method of solidifying a pipe inner wall of a curved workpiece (200) having a workpiece bore (201), comprising at least the following steps: a) providing a jet nozzle unit (100) having a jet nozzle head (20) connected to a flexible abrasive supply hose (10); b) blasting by conveying a blasting medium through the blasting agent supply hose (10) to the jet nozzle head (20) by means of compressed air and emitting the blasting agent on the workpiece inner wall; characterized in c) that at least one of the jet nozzle head (20) adjacent end portion of the blasting agent supply hose (10) is passed through a support member (30); d) the support element (30) is applied to a workpiece end (203) or the workpiece end (203) to the support element (30); e) that the blasting agent supply hose (10) is introduced together with the jet nozzle head (20) in the workpiece bore (201) and advanced along a Strahlbehandlungsstrecke within the workpiece bore (201) and then retracted into the support member (30), wherein the blasting agent during the forward movement and / or during the withdrawal movement through the nozzle openings (21) is discharged; and f) retracting the support member (30) from the workpiece end (203) or retracting the workpiece end (203) from the support member (30).