Method and device for releasing a blind rivet

A method for releasing a blind rivet (10) having a work mounting (12) having a rivet hole (20) and a deformed sleeve pleated blind rivet (14) having a rivet sleeve (21) and a Nietdornrest (26), wherein the rivet sleeve (21 has) extending through a the rivet hole (20) said collar shank (22) and a visible side sleeve head (24) having an axial recess (36) (at one of the workpiece assembly 12) facing side of the sleeve head (24) is formed and in which a shaft protrusion (34) extends in the radial direction, which has been formed during the deformation of the blind rivet (14), said stem projection (34) having a projection outside diameter (D3) which is larger than a base outer diameter (D4) of the shell shank (22 ), comprising the steps of (the sleeve head 24) (to separate 22) by machining with axial advance of a clamping tool (40) of the sleeve shank, said clamping tool (40) is chosen so that d he shaft projection (34) on the sleeve head (24) remains when the sleeve head (24) from said sleeve shank (22) is disconnected.