Screwdriving and Riveting Assembly

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As household appliance manufacturers continue using thinner sheets of material, engineers must address new challenges and explore alternative joining solutions.

To the general public, a washer is just a cheap metal disc that keeps screws, bolts, and nuts tight. But to manufacturers, a washer is a vital fastening component, specially designed to perform unique functions and ensure a reliable bolted joint.

Electric tools have been available for more than a decade. However, until recently, many manufacturers were reluctant to invest in the technology because DC electric screwdrivers and nutrunners traditionally were more expensive than air-powered alternatives.

Steel is not about to disappear anytime soon as the dominant material used in the home appliance industry. Unlike automakers, which are turning to aluminum, carbon-fiber composites, magnesium, plastic and other lightweight materials, steel still rules in the world of refrigerators, dishwashers and dryers.

Manufacturing engineers have two options for obtaining an automated assembly system. They can get each component—an automatic screwdriver, a rotary indexing dial, a gripper—from individual suppliers and integrate the parts themselves. Or, they can ask one supplier to deliver a turnkey machine.

CLEVELAND—ASG, a manufacturer of fastening equipment for the assembly market, has become the exclusive North American distributor for Fiam air tools.

PHILADELPHIA—Naval Sea Systems Command has completed a fleetwide fastener study, identifying and recommending the removal of thousands of fasteners from the Navy supply system. The review identified 108,000 dormant fasteners—fasteners with no contract, requisition or maintenance history in the past five years—and 3,200 duplicate fasteners where two or more identical fasteners had different stock numbers.

Independence, OH—The Industrial Fasteners Institute has published two new reference books on fastening: Mechanical Fastening and Joining, by Bengt Blendulf, and Torque Book for Fasteners, by Joe Greenslade.

A growing number of manufacturers are moving from air tools to electric tools and from corded electric tools to cordless tools.

On May 22, 2012, after eight years of preparation, Space Exploration Technologies (better known as SpaceX) launched the Dragon spacecraft atop a Falcon 9 rocket from Cape Canaveral Air Force Station in Florida. The spacecraft traveled more than 200 miles to reach its destination: the International Space Station (ISS).