METHOD FOR PRODUCING SMALL BORES IN WORK PIECES BY CHANGING AN OPERATING PARAMETER WITHIN A BEAM PULSE

摘要

A method for producing in particular conical bore holes in work pieces, wherein the contouring and cross-sectional form of the bore hole can be influenced in that one or a plurality of operating parameters are changed, which parameters are elected from the following group: pulse length, beam diameter, beam current, acceleration voltage, beam focusing, deviation of the electron beam from a beam axis, movement velocity of the electron beam over the work piece.

主权项

1. A method for producing small bores in work pieces by using an electron beam, the method comprising the steps of:
a) placing a work piece on an underlay, which releases a gas when energy is supplied; and b) directing an electron beam onto the work piece until it reaches the underlay; c) at least one operating parameter that is selected from the following group of parameters is changed: beam diameter, beam current, pulse duration, beam focusing, relative deviation of the electron beam from an equipment axis, path velocity of the electron beam over the work piece and energy per unit length; and d) the change is performed within a beam pulse.