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  • Resistance Welding Fundamentals (.pdf)
    Resistance welding is a thermo-electric process in which heat is generated at the interface of the parts to be joined by passing an electrical current through the parts for a precisely controlled time and under a controlled pressure (also called force). The name "resistance" welding derives from
  • Micro-Resistance Welding
    One form of welding that is rapidly gaining in popularity as electronics and other devices continue to shrink is the process of micro resistance welding. This process is a thermal process, where the parts to be welded are heated to their melting points at their interface, and thus form one body
  • Resistance welding tackles tubes
    Resistance welding was once considered only for joining sheet metals. No more. Delphi Technical Fellow for Welding Delphi Energy & Chassis Systems Welded thin-wall tubes form a variety of sturdy, lightweight structures. But joining the parts has its challenges. Conventional laser, MIG, and TIG
  • Compensating for Varying Material Conditions in Resistance Welding (.pdf)
    Unitek Equipment's advanced weld heads and closed-loop power supplies provide exceptional control over the force and energy variables in resistance welding. In addition to controlling these variables, consistent part placement and material control are required to achieve consistent welding results
  • The Importance of Squeeze Time in Resistance Welding (.pdf)
    Controlling the electrode force is a critical part of successful resistance welding. Repeatable weld force provides for consistent welds. For this reason, all Unitek Peco weld heads include a standard force-firing feature that initiates the power supply when a preset electrode force is reached
  • The Effects of Polarity on the Resistance Welding Process (.pdf)
    In resistance welding, both the weld heat and the size of the weld nugget can increase or decrease depending on the polarity of the current passing through the parts. This is caused by a phenomenon known as "The Peltier Effect", which is present when the weld current flows in only one direction
  • Sensor Sense: Inductive sensors and resistance welding
    Inductive sensors and resistance welding Resistance welding is known to create electromagnetic interference at levels high enough to falsely trigger inductive proximity sensors. Inductive proximity detectors used near welding applications require special coil and core combinations to prevent false
  • The Benefits of Closed-Loop Control for the Resistance Welding Process (.pdf)
    Closed-loop resistance welding power supplies use current and voltage feedback sensors to control the energy delivered to the parts. Closed-loop technologies provide many benefits for the resistance welding process. Taking full advantage of these benefits requires a good understanding of resistance
  • Medical Device Link . Improving Resistance Welding Process Control in Medical Applications
    Medical Device & Diagnostic Industry New systems enhance manufacturers' control over key variables during the welding process. During the past two decades, resistance welding has become a widespread method for joining metals in medical manufacturing applications such as biosensors, catheters
  • The Influence of Water Temperature & Flow on Resistance Welding Electrode Life
    Many studies have been made to determine the best copper alloys for producing high-quality welds and long life when resistance welding steel, particularly galvanized metal. New electrode designs that use unique geometry have been developed to accomplish the same results. Many control designs can

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