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Four Heads Are Better than One: 4-headed Riveter Improves Quality, Reduces Part Cost for Ladder Manufacturer

WAUPUN, Wis., October 24, 2013 -- When multiple rivets secure a part, setting one rivet at a time increases the risk for part misalignment. Seeking a better solution, a nationally known ladder manufacturer contacted National Rivet & Mfg. Co. to see if it would be possible to simultaneously set four rivets. Because "specials are standard" at National Rivet, the engineering team was able to design a four-headed hydraulic riveting machine that ensured consistent and accurate part production, as well as decreased cycle time.

"With a customized arm and the ability to set four rivets at once, the ladder manufacturer can correctly orient the part, repeatedly achieve proper alignment and eliminate unwanted variations," says Kevin Klapperich, Manager - Machine Division, National Rivet.

Even with odd-shaped parts - such as the aluminum rung of a ladder - the riveter ensures consistency and accuracy. "Customizing arm and tooling is something we do all the time," says Klapperich. "By setting four rivets at once, we saved our customer money and reduced his headaches."

National Rivet modified its largest and most powerful riveter, the Model 3160, to include four hoppers, feed mechanisms, anvils and drivers, as well as a customized arm to accommodate the unusual part shape. In addition, the riveter features an operator interface with touch screen controls to monitor and change machine dwell, shuttle and hopper timers, and cycle counts. The machine is equipped with a safety probe device to protect operators and manual control buttons for troubleshooting and machine set-up.

For the ladder customer, a 1- x 2-inch component is aligned for setting four solid aluminum rivets that are 3/16" diameter. In addition to customizing the arm to properly fit the part, National Rivet customized the anvil so that it has a cup-like shape to upset the rivet in such a way that it creates a smooth, rounded appearance.

Klapperich concludes, "The customer gets a better looking, higher quality part at a lower cost - what's not to like?"

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