Abstract: A lockbolt including a bolt shaft having a locking portion. The locking portion includes a plurality of grooves around a surface of the bolt shaft and a plurality of peaks at least some having a parallelogram shape and being disposed between the plurality of grooves. The lockbolt also includes a bolt head on a first end of the bolt shaft.

Abstract: A method of securing at least two workpieces, which includes inserting a bolt shaft through a bore hole formed in each of the workpieces, and applying a sealant to the workpieces. Further, the method includes engaging a locking collar with the bolt shaft such that the locking collar is securely deformed in a locking manner thereby forcing the sealant to uniformly distribute and form a thin surface sealant layer on the bolt shaft.

Abstract: A lockbolt includes a bolt head, a shank, a locking portion, a predetermined breaking point, and a break-away portion. The locking portion includes a knurled surface having knurling peaks between intersecting knurling grooves that extend in a direction with an axial component, e.g. spiraling helically. A sealant on two workpieces smears onto the knurled surface when the bolt is inserted in a hole therein, but does not need to be removed. A locking collar is swaged onto the locking portion to secure the workpieces between the head and the collar. The sealant is distributed as a thin layer to provide a seal and an adhesive bond between the collar and the knurled surface. Excess sealant is squeezed-out axially, without forming encapsulated pressurized sealant pockets and without hindering the swaged engagement of the locking collar onto the knurling. Then the break-away portion is broken-off at the breaking point.

Abstract: Three-dimensional large scale bodies such as jumbo aircraft fuselages (14) are assembled in body sections around a central longitudinal assembly core (1) which itself is mounted at its ends and accessible all around along its length. Robots carrying tools for holding, transporting and precisely positioning pre-assembled wall shell sections, are movable along the central core (1). First, at least one floor grid (2 or 3) is releasably mounted to the core. Then, side wall shell sections (4, 5) are secured to the floor grids. Then, top and bottom wall shell sections (10, 8) are secured to the side wall shell sections (4, 5) to form a body section (BS) of the large scale body (14). Neighboring body sections are secured to each other along cross-seams. Upon completion, the floor grids are released from the core (1) and the core is removed preferably withdrawn longitudinally from the assembled large component or body.

Abstract: A lockbolt includes a bolt head, a shank, a locking portion, a predetermined breaking point, and a break-away portion. The locking portion includes a knurled surface having knurling peaks between intersecting knurling grooves that extend in a direction with an axial component, e.g. spiraling helically. A sealant on two workpieces smears onto the knurled surface when the bolt is inserted in a hole therein, but does not need to be removed. A locking collar is swaged onto the locking portion to secure the workpieces between the head and the collar. The sealant is distributed as a thin layer to provide a seal and an adhesive bond between the collar and the knurled surface. Excess sealant is squeezed-out axially, without forming encapsulated pressurized sealant pockets and without hindering the swaged engagement of the locking collar onto the knurling. Then the break-away portion is broken-off at the breaking point.

Abstract: Three-dimensional large scale bodies such as jumbo aircraft fuselages (14) are assembled in body sections around a longitudinal central assembly core (1) which itself is mounted at its ends and accessible all around along its length. Robots carrying tools for holding, transporting and precisely positioning preassembled wall sections, are movable along the central assembly core (1). First, at least one floor support grid (2 or 3) is releasably mounted to the central assembly core. Then, side wall sections (4, 5) are first secured to the floor support grids. Then, top and bottom wall sections (10, 8) are secured to the side wall sections (4, 5) to form a body section (BS) of the large scale body (14). Neighboring body sections are secured to each other along cross-seams. Upon completion, the floor support grids are released from the central assembly core (1) and the core is removed preferably withdrawn longitudinally from the assembled large body.

Abstract: Three-dimensional large scale bodies such as jumbo aircraft fuselages (14) are assembled in body sections around a central longitudinal assembly core (1) which itself is mounted at its ends and accessible all around along its length. Robots carrying tools for holding, transporting and precisely positioning preassembled wall shell sections, are movable along the central core (1). First, at least one floor grid (2 or 3) is releasably mounted to the core. Then, side wall shell sections (4, 5) are secured to the floor grids. Then, top and bottom wall shell sections (10, 8) are secured to the side wall shell sections (4, 5) to form a body section (BS) of the large scale body (14). Neighboring body sections are secured to each other along cross-seams. Upon completion, the floor grids are released from the core (1) and the core is removed preferably withdrawn longitudinally from the assembled large component or body.

Abstract: Construction parts, particularly in the aircraft industry, are interconnected as follows.