| 摘要 |
An area (13) of a structural skin surface (9) and the surface of a reinforcing stringer to be applied to the skin are laser scanned (10). A control unit (12) calculates gaps existing between the skin and strap faces in relation to an imaginary line spanning the selected area and tangential to contact points between skin and stringer. The size and shape of a filler material required to fill the gaps is determined and data sent to a filling material metering unit which prepares the material according to each gap position. After location in the non-flat areas filler is leveled by placing the stringer onto the area (13) to be reinforced. Each gap between the skin (9) and stringer surfaces is calculated by a computer. The computer determines the lowest point of a surface depression of the shell face (9) from a line tangential to the contact points of this surface and then the lowest point of a depression on the stringer surface from a line tangential to contact points on the latter surface, where both lines span the breadth of the scanned area. The two depths determined are added together for each scanned area. When one surface has no deviation from a flat surface only one depth is relevant and represents the gap width. The laser (10) scans a rectangular area (13) on the skin face and the stringer face breadth and length are matched to the scanned area. Filling material may comprise filler pieces corresponding to the shape and size of depressions determined by the control unit (12). Each filler pieces is cut by ultrasonic knife. Alternatively a metering unit prepares a paste or powder filler which is metered into the depressions. Deviations from the flat surfaces may be above or below the latter surfaces. Filler may be positioned by hand or dispenser. Stringers are thick walled and of metal or plastic. The thick walled skins (2) are also of metal or plastic. |
