Abstract: A method of assembling a structure in aircraft or spacecraft production wherein two components to be joined together at a joint are provided, each component comprising a joining region. Sealant is applied to one of the component joining regions. An arrangement is formed by positioning the components relative to each other, whereby an uncured layer of the sealant is formed between associated joining regions. The associated joining regions are clamped against each other using a clamping device, and a clamped state is maintained until the layer of sealant has cured to a pre-defined degree, the clamping device being installable on and transportable along with the arrangement. After the layer of sealant has cured to the pre-defined degree, drilling at a plurality of fastening positions is performed to obtain a hole of final dimension at each fastening position, and installation of a final fastener at each fastening position is performed.

Abstract: A method of assembling a structure in aircraft or spacecraft production wherein two components to be joined together at a joint are provided, each component comprising a joining region. Sealant is applied to one of the component joining regions. An arrangement is formed by positioning the components relative to each other, whereby an uncured layer of the sealant is formed between associated joining regions. The associated joining regions are clamped against each other using a clamping device, and a clamped state is maintained until the layer of sealant has cured to a pre-defined degree, the clamping device being installable on and transportable along with the arrangement. After the layer of sealant has cured to the pre-defined degree, drilling at a plurality of fastening positions is performed to obtain a hole of final dimension at each fastening position, and installation of a final fastener at each fastening position is performed.

Abstract: Thus relates to a movable backing system for clamping plate-shaped backing work pieces for friction agitation welding and friction stir welding and to a friction agitation or stir welding system. The movable backing system comprises an upper unit to be arranged above the backing work pieces to support the backing work pieces, a lower unit to be arranged below the backing work pieces to support the backing work pieces, and a connecting means connecting the upper and the lower unit to be arranged in a gap between the backing work pieces to be welded.

Abstract: Thus relates to a movable backing system for clamping plate-shaped backing work pieces for friction agitation welding and friction stir welding and to a friction agitation or stir welding system. The movable backing system comprises an upper unit to be arranged above the backing work pieces to support the backing work pieces, a lower unit to be arranged below the backing work pieces to support the backing work pieces, and a connecting means connecting the upper and the lower unit to be arranged in a gap between the backing work pieces to be welded.