| 摘要 |
The present invention relates to drilling so as to form a through hole (8) in a fiber-reinforced composite (1), which is obtained by laminating fiber-reinforced resin sheets (14-17) that have been reinforced by fibers. The present invention suppresses defects such as delamination and cracks in the fiber direction around the drilled portion on the reverse side to the surface in contact with a drilling tool (7). A cup (12) is provided with an opening (19), and a sealing means (20) on a surface thereof in contact with the fiber-reinforced composite (1). The cup (12) is pressed to the surface on the reverse side to the surface of the fiber-reinforced composite (1) in contact with the drilling tool (7) to create an enclosed space inside the cup (12), and pressurized air is supplied to inside the cup (12) to create a high-pressure space inside the cup (12). While the inside of the cup (12) is in such a high-pressure state, the drilling tool (7) is contacted to the fiber-reinforced composite (1) to form the through hole (8). |
