Air assisted fast return stroke for rivet setting tool

摘要

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