Zieheinrichtung fuer Zieh-Blindniete

摘要

1305389 Riveting GEORGE TUCKER EYELET CO Ltd 8 May 1970 [10 May 1969] 23896/69 Heading B3U A blind riveting tool includes mandrel gripping jaws 98 mounted in inclined guideways 96 of a reciprocable jaw holder 90 and coupled to a sleeve 52 which is movable relative to the jaw holder 90 so as to open and close the jaws 98 before the jaw holder 90 begins to move. Air under pressure is constantly supplied through a hose 80 into a chamber 34 of a housing 12 so as to urge to the left a piston 66 which is coupled to a sleeve 62 connected to the jaw holder 90. When hydraulic fluid is introduced into the chamber 34 via an inlet 82, it first acts on the rear face of the sleeve 52 so that the jaws 98 are closed on the mandrel and then acts to move the piston 66 and sleeve 62 to the right so as to set the rivet. After setting the rivet, the hydraulic pressure is released and air under pressure is supplied via an inlet 60 to a cylinder 36 of the housing 12 in front of a piston 56 connected to the sleeve 52. The sleeve 52 is thereby moved relative to the sleeve 62 so as to open the jaws 98 before the air pressure behind the piston 66 can return the sleeve 62 and jaw holder 90 to the initial position. A stream of air is supplied through an inlet 112 to provide a rearwardly flowing air current through a tube 104 to enable removal of the broken mandrel through the tube 104..