Content tagged with "resistance-welding"
Results: 10
Article
June 26, 2009
Getting close to remote laser welding
Figure 1
A remote laser welding cell doesn't take up too much room on a shop floor and holds the promise of being more productive than traditional spot welding setups. Photo courtesy of Rofin-Sinar Inc.
In an RLW system (see Figure 1 ), the laser beam is focused over the workpiece... Read more...
Article
June 7, 2009
Article
February 24, 2009
Welding fasteners: Spot or projection?
Both spot and projection weld fasteners have their place. Spot welding fasteners resistance-weld directly to a sheet with either a rocker-arm or a press-type resistance welding system (see Press-type resistance welding machines can perform both spot and projection welding.">Figure 1 and... Read more...
Article
May 13, 2008
Resistance-weld more for less
This multigun resistance welding system is designed for automotive exhaust systems. Resistance welding often is viewed as a process shrouded in mystery, and one of its most misunderstood components is the welding electrode. Electrodes have a profound effect on weld integrity and, ultimately,... Read more...
Article
March 11, 2008
Respecting your resistance welder
Figure 1 The secondary circuit of this resistance welding machine that arced out because of loose bolts had to be machined. Resistance welding machines are the Rodney Dangerfields of the welding world—they don't get no respect. Since the resistance welding (RW) process is not widely... Read more...
Article
February 12, 2008
Projection welding for nut and bolt attachment
Figure 1 Weld Nuts Studied A modern car body contains some 300 welded and punched fasteners, such as bolts, nuts, and studs. The quality of the attachment of these fasteners to the stamped body components is critical for the final product's safety and reliability. Crucial components such... Read more...
Article
August 8, 2007
Gaining control of resistance welding
"Running blind" is an expression that can be applied to resistance welding operations throughout the manufacturing world. Many engineers and operators have no clear information on what is actually occurring during the weld or a means to verify the equipment. As the pressure mounts on... Read more...
Article
August 8, 2007
Mode of least resistance
Figure 1 This schematic of a weld setup shows top and bottom electrodes (red) holding parts to be welded. Rw is the total of all resistances that directly or indirectly contribute heat to the weld interface; Rw is the sum of multiple contact/interface resistances and bulk resistances. Ro is... Read more...
Article
March 7, 2006
A new way to weld sheet metal
Figure 1 Nu-Way Industries Inc. turned to laser seam welding to fabricate this stainless steel microwave enclosure. The old way didn't work for Nu-Way Industries Inc., Des Plaines, Ill. The large custom sheet metal fabricator needed a new method of welding to replace the traditional... Read more...
Article
September 13, 2005
Get your schedule in order
Spot welds in this galvanized steel truck door frame must be free of surface burrs that can tear clothing when someone enters or exits the vehicle. High weld strength also is necessary for door assembly support when the vehicle is in service, especially in the event of a crash. These... Read more...
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