Air assisted fast return stroke for rivet setting tool

摘要

A rivet setting tool (12) is provided including a pulling head (43) and a jaw case (44) connected to the pulling head (43) such that the jaw case (44) is driven by the pulling head (43) to engage a rivet mandrel. Air is supplied to the pulling head (43) to return the pulling head (43) to its original position after a rivet (R) has been set. A remote intensifier (40) is provided including an air piston (224) disposed in a piston chamber (220) and a rod (228) connected to the air piston (224) and extending into a ram housing (230) which is connected to a hydraulic passage (212) which is connected to the pulling head (43). A first supply of pressurized gas communicates with a first end of the piston chamber (220) and a second supply of pressurized gas communicates with a second end of the piston chamber (220) for rapidly returning the air piston (224) to the retracted position in combination with the air pressure applied to the pulling head (43). The second end of the piston chamber (220) is vented to prevent to much pressure build up pushing the piston (224) to the retracted position.