![]() ![]() Another monitoring technology is a technology that measures the electrode displacement according to the change of welding time, which is characteristic of the resistance spot welding process, using a Linear Variable Displacement Transducer (LVDT) sensor, and uses the results to predict the welding quality. Among the monitoring technologies of the resistance spot welding process, the monitoring of dynamic resistance, which is the most commonly used monitoring technology, acquires changes in the dynamic resistance value as the welding time changes through the measurement of current and voltage values during the resistance spot welding process, and identifies the characteristic points, which can be used to predict or identify the mechanical properties and expulsion of the weld. Based on the characteristics of the resistance spot welding process, the factors that can be monitored are the current, the dynamic resistance value using voltage measurements, the displacement of the welding electrode, and the indentation that occurs after welding. Through the application of welding process monitoring technology, it is possible to improve the quality of welds, reduce the reject rate, and improve the work efficiency of welding operators. This increasing demand has led to abundant research on resistance spot welding process monitoring technology. As the application of new high-strength steel plates and lightweight materials increases, the demand for monitoring the welding quality of new materials is growing. Resistance spot welding is mainly used for automobile body welding, but it is also applied to aircraft and home appliances. ![]() ![]() ![]() Resistance spot welding is an economical and highly productive welding process in the automotive industry. ![]()
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