Rivet Jaws

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The rivet jaws control the rivet prior to and as the rivet is being delivered to the anvil during assembly. The jaws are attached by “jaw legs” and often have booster springs attached to the jaw legs to ensure the jaws maintain the required amount of squeeze force on the rivet to ensure proper feeding. When the rivet machine is cycled, the jaws move downward toward the anvil and stop  just above the anvil pin (spring loaded anvil pin) or just above the workpiece (on some countersunk hole applications). As the driver (or ram) pushes the rivet head down through the jaws, the rivet is then delivered through the workpiece to the anvil from where the actual clinching takes place.   

Rivet jaws holding rivet at rest prior to machine cycle Driver pushing rivet through the jaw halves onto the spring loaded anvil pin

Once the rivet has exited the jaws completely, the downward pressure of the driver on the rivet head, against the upward resistance of the spring-loaded anvil pin, keep the rivet aligned prior to clinching.

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