| 主权项 |
1. A method for drilling at least one hole into a front wall section of a workpiece by way of a machining jet formed from liquid, to which abrasive material is admixed such that the at least one hole is drilled at least partially with impingement on the front wall section by the liquid and impingement on the front wall section by the abrasive material, the front wall section being located in front of a rear wall section of the workpiece, as seen looking in a drilling direction, the rear wall section being disposed with an intermediate space at a distance from the front wall section,
wherein in the method the at least one hole is drilled at least partially by the machining jet impinging on the front wall section in a pulsed manner, the pulsed machining jet being generated by the recurrent interruption of the impingement of at least one of said liquid and said abrasive material on the front wall section, and wherein a shape of the hole is reworked using the pulsed machining jet after the time at which the machining jet has penetrated the front wall section, and wherein the front wall section includes a rear side facing said intermediate space and a front side opposed to the rear side, wherein the impingement is only on the front side of said front wall to drill the at last one hole. |
