Abstract: The present invention relates to a process for riveting materials by means of a blind rivet and corresponding blind rivets. The process of the invention in particular carries out the step of stretching the body of the sleeve (31) before blocking it from one part to another of an assemblage (13, 14) between an abutment head (50) and a blocking head (51). The extending of the body of the sleeve is especially permitted by the cooperation of a stop means (44) with a shoulder (36a) of the shank of the mandrel (32), and by the pulling exerted on the mandrel. The present invention also relates to blind rivets adapted to be set by the process of the invention.

Abstract: The invention relates to a process for assembling materials by means of a riveting member of the type comprising a mandrel (2) and a sleeve (1). The sleeve (1) is provided with a peripheral recess on its external surface, in particular a groove (5), for forming a bending zone, while the mandrel has a head (9) able to deform the tubular end of the sleeve and to fold it back at the level of its bending zone. During riveting, the peripheral recess of the sleeve preserves the starting point of the countersink of the material against any stress and the bending zone of the sleeve permits providing a bearing surface of great dimension applied precisely against the materials.

Abstract: A semi-tubular or tubular rivet for joining soft or fragile parts such as composite materials and comprising a pre-formed head (1) and a shank (2) having an axial hole (3) forming a tubular portion (2b) opposite the head (1), a peripheral groove (4) on the outside of the shank (2) at the tubular portion (2b), a pinning surface (Sa) on the outside surface of the shank near the free end of the shank; and a process particularly suited for assembling materials using the rivet.

Abstract: The invention relates to a process for dispensing identical pieces having a symmetry of revolution about an axis, such as rivets; this process comprises arranging the pieces one after another in a tube (2) which has a hollow center (2a) adapted to assure the guiding thereof, admitting a compressed fluid into the tube behind the last piece (1D), and distributing said fluid along the length of the tube toward the hollow center (2a) thereof, to the interior of one or several longitudinal passageways (2b), such that the fluid pressure is exerted along the hollow center in the spaces (E) separating the pieces, up to the first piece (1P) on which the pressure acts for assuring its transfer. The process of the invention permits dispensing a very great number of pieces without risk of jamming in the tube and with a precise guiding permitting maintaining the alignment of the axes of the pieces.

Abstract: The invention relates to a process for dispensing indentical pieces having a symmetry of revolution about an axis, such as rivets; this process comprises arranging the pieces one after another in a tube (2) which has a hollow center (2a) adapted to assure the guiding thereof, admitting a compressed fluid into the tube behind the last piece (1D), and distributing said fluid along the length of the tube toward the hollow center (2a) thereof, to the interior of one or several longitudinal passageways (2b), such that the fluid pressure is exerted along the hollow cetner in the spaces (E) separating the pieces, up to the first piece (1P) on which the pressure acts for assuring its transfer. The process of the invention permits dispensing a very great number of pieces without risk of jamming in the tube and with a precise guiding permitting maintaining the alignment of the axes of the pieces.