Verfahren zum Materialabtrag an einem bewegten Werkstueck

Abstract

A process for the removal of material from a moving workpiece comprises a pulsed, high-energy, mainly focused (44) laser beam (22) which applies a predefined partial area (21) of the moving workpiece (20) with radiation in synchronism with the movement of the workpiece (20). During this operation, the deviation from its nominal value of a physical actual parameter of the workpeice (20), e.g. the unbalance, is detected in real time. The laser beam (22) is then trained in consecutive steps while applying a process gas mainly containing oxygen on this partial area (21) of the workpiece (20) until the physical actual value approaches the nominal value within a predefined tolerance range. Finally, a predefined number of said individual pulses of the laser is applied to the material removal area (60, 61, 62, 63) previously pulsed while feeding an inert gas. Thus, it is possible to obtain large material removal rates, whereby clean turn-down (61), turn-up (62) and edge zones (63) are obtained without ejections in the lateral area (64). By moving the workpiece (20) laterally along the axis of rotation (50), a flat material removal with a defined surface area (60) can be obtaine