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Combating internal condensation in your resistance welding machine
Resistance welding transformers generate a lot of heat, which is why most of them are designed to be water-cooled. But when condensation forms internally as a result of an improperly set chiller temperature, a number of catastrophic issues can...
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Don't forget the fixturing
Don't forget a component of the system sometimes can dictate whether a robotic welding integration succeeds or fails: the fixturing.
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Welding fasteners: Spot or projection?
Both spot and projection weld fasteners have their place. Choosing which process to use—spot or projection welding—depends, like anything else, on the application
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Resistance-weld more for less
Costs associated with poor resistance weld quality often can be traced back to faulty electrode usage. With today's high cost of copper—to say nothing of the extra labor and lost production time—wearing out electrodes prematurely has...
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Respecting your resistance welder
Resistance welding results are only as good as the machine that is completing the process. By understanding how to properly maintain your resistance welding machine, you will be able to prevent unnecessary problems that tend to plague the unit's...
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Projection welding for nut and bolt attachment
Projection welding, also known as resistance fastener welding, is the most common method for nut and M- or T-thread bolt welding. This article examines recent experiments with projection welding of those components to various high-strength steel...
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Mode of least resistance
With the advent of transistorized controls in resistance welding, power supplies are available in which feedback can be used to control current, voltage, or power delivered. The use and benefits of these control modes are not well understood,...
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Why use multiple-impulse resistance welding?
Multiple-impulse welding isn't uncommon, but it's not usually the first choice for most resistance welding applications. However, experiments with this type of resistance welding demonstrate that it has a wider range of applications, especially...
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Revving up weld quality
Before introducing new resistance welding systems, Ford Motor Company's New Model Product Development Center was cluttered and dark, and it was difficult to work there because of the high number of weld controls and weld guns being used...
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Exercising control
This three-phase, mid-frequency inverter is a dual-gun projection welding machine with a pneumatically operated lift table for the workpiece. Although mid-frequency technology isn't new, North American buyers are increasingly turning...
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Electric resistance welding at a glance
This article provides an overview of electric resistance welding (ERW). It dicusses high-frequency ERW (contact and induction) and rotary wheel contact welding (AC, DC, and square wave). It describes the differences among the processes, as well as...
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What you don't know about spot welding
Resistance welding equipment has many uses that many people often don't think about. Everyday items that some may not associate with resistance welding owe their very existence to this versatile process.
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Examining electric resistance weld nuggets in tube and pipe
An in-depth examination of electric resistance welding nuggets as a quality control step in the manufacturing of high-strength tube and pipe used for pressure applications
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