Method for reinforcing the edge of a hole, tool with a hole with reinforced edge and hole edge reinforcement device

摘要

The method involves penetrating a hole area of the work piece in penetration direction by displacement of fibers (8) with a mandrel, where the hole area has thermo plastically bonded fibers, particularly a thermo plastically bonded fiber tangle. A preset end area (10a) surrounding the mandrel is compressed with a pressing area of a stripping part (16) relative to work piece areas of the hole area. Independent claims are also included for the following: (1) a work piece with an end area of hole area with fiber length distribution; and (2) a hole edge reinforcement device for amplifying a predetermined end area.