GB1420846A - Method and a tool for blind riveting - Google Patents

Abstract

1420846 Riveting; jointing by forging VUMA VYSKUMNY USTAV MECHANIZACIE A AUTOMATIZACIE 26 Feb 1973 [7 March 1972] 9420/73 Headings B3U and B3H The shank of a blind tubular rivet 22 is deformed to anchor it to the mandrel 15 of a blind riveting tool before the riveting operation is carried out. The tool, which sets arivet 22 whilst another rivet 22 is simultaneously anchored to a mandrel 15, comprises an outer sleeve 12 rotatably mounted to arms 10, 11 and an inner sleeve 13 which is provided at each end with an anvil 21. Slidably mounted in each anvil 21 is a mandrel 15 having a grooved or threaded end 25 or an enlarged end (27) (Fig. 9, not shown) and provided at its end with pins 17, 18. The pins 17, 18 are movable within slots in the sleeves 12, 13 and are biased apart by a spring 16. In operation, a rivet 22 on the right hand mandrel 15 is pulled by the arms 10, 11 into a device 14 which deforms the rivet shank on to the mandrel 15. Upon further movement of the arms 10, 11, the anvil 21 abuts the device 14 whereupon the outer sleeve 12 moves relative to the inner sleeve 13 to cause a rivet 22 anchored in the left hand mandrel 15 to be set within the workpiece. The sleeve 12 is then turned by a lever 26 to present the rivet 22 previously anchored by the device 14 to the riveting position and to present a new rivet 22 to the device 14. The rivet may be sealed by a core (30) (Fig. 7, not shown). A rivet may alternatively be anchored on the mandrel by moving the device 14.