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  • Advanced Data Analysis for Resistance Weld Monitoring
    Medical device manufacturers are experiencing an ever-increasing emphasis on process accountability. ADAM is a technology developed for resistance welding.
  • Using the Resistance Set Feature (.pdf)
    The heat generated in a resistance weld is greatly affected by the electrical resistance of the work piece. Consistent work piece resistance is necessary for achieving repeatable resistance welding results. The Resistance Set feature, which is standard on Unitek Equipment models UB25, DC25 and HF25
  • 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 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
  • Introduction to SPC and Weld Checkers and Monitors (.pdf)
    and monitors are SPC devices. What is SPC and how does it relate to the Weld Checkers and Monitors and the Resistance Welding process? SPC is a method which uses the concepts of probability and statistics to determine a normal and acceptable pattern of variation in a process. The process is then monitored
  • 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
  • Resistance Spot Welding Is Still Spot On
    Resistance spot welding may be an older method, but it is still one of the best for welding many industrial parts, especially in the high-volume production stage. Used extensively in automotive and electronic parts manufacturing, resistance spot welding basically is sandwiching two metals
  • 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
  • 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
  • Battery Welding Solutions Using Resistance & Laser Technologies (.pdf)
    In the battery industry, the use of resistance welding for electrical connectivity and battery pack manufacture dates back many decades. The weld controls that provided the foundation for this market were Capacitive Discharge (CD) and AC welders. This technology remained largely unchanged for many
  • 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
  • Examining the corrosion resistance of chromium-passivated stainless-steel tubes
    , such as weld bead and heat-affected zones (HAZs). This results in metallic particle generation at susceptible points. Thus, corrosion-induced particles generated at the wetted surfaces of the electropolished tubes affect halogen's point-of-use purity. Recently, chromium-rich oxide passivation (CrP
  • Surface Chemistry Improvements on 316L Stainless Steel Weld
    and related corrosion resistance of austenitic stainless steel is affected. by mechanical polishing, welding, and most fabrication techniques. Passivation reduces or eliminates this damage. while forming a more corrosion resistant passive film higher in chromium oxide. There have been many technical

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