Development of a laser ablation process model and a disposable 3D-printed tool head for weakening thick steel sheets for the deflagration of hazardous substances

Abstract

So far, laser processes for the defined weakening of metals have been investigated only in wall thickness ranges of a few millimeters. In the case considered, the sheaths of UXOs (4–25mm) are to be weakened in order to reduce danger. The developed model for the melt-ablation process with a 2kW solid-state laser enables the defined weakening of steel sheets of up to 15mm. It is ensured that a critical temperature of 300°C on the underside of the material is not exceeded. In accordance with the process requirements, a cost-effective 3D-printed disposable process head is manufactured and verified with regard to the developed model.