It is very important to begin the squeezing operation with the rivet factory head as tight to the material as possible, allowing the setting to take place at the shop head of the rivet (Figure 2). The material pieces are firmly clamped together and also firmly clamped to a workbench or jig, and the squeezer is operated smoothly and axially to the rivet to set or deform the shop head. To use the rivet squeezer, the correct rivet die (universal or flush) is installed on the factory side of the rivet squeezer, and an anvil (or flush) die is installed on the shop head side of the squeezer (Figure 1). The rivet gun is an impact type of a tool that provides repeated axial impact forces (think hammer) to deform and set the rivet. The rivet squeezer is a compression type of tool that applies a continuous axial force to the rivet, deforming the shop head. Next, the individual material pieces need to be firmly clamped together during this setting process so that no intermediate space allows the rivet to swell between the materials.įinally, the components cannot be allowed to move relative to each other during the setting, or the rivet or the forces applied to the rivet will tend to deform the material and not the rivet. Any nonaxial force vector will tend to bend rather than expand the rivet. This axial force must be applied to the rivet in order to mushroom the shop head concentrically. If you consider that deformation must occur at a value above the yield strength of the rivet, you can calculate that the setting force of a -3 (3/32-inch diameter) rivet is in the order of 345 pounds and of a -4 (1/8-inch diameter) rivet, 615 pounds.
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