DEFECT REDUCTION IN SPOT WELDING PROCESS FOR M12x1.25mm WELD NUTS USING ENGINEERING EXPERIMENTAL DESIGN TECHNIQUES
Keywords:
Optimal parameter, Resistance Spot Welding, Design of ExperimentAbstract
This research aims to reduce the number of defective products resulting from customer complaints regarding the detachment of welded nuts in automotive truck bed support beams. The study applies engineering experimental design techniques to determine the optimal parameters for the resistance spot welding process. The key parameters affecting the issue of nut detachment include welding current, welding time, and electrode force. Statistical analysis results indicate that the optimal parameters for the resistance spot welding process are a welding current of 14 kA, a welding time of 12 cycles, and an electrode force of 4,000 N. When these optimal parameters were implemented in actual production, the number of defective products due to nut detachment decreased from 42 pieces (0.34%) to 0 pieces. This effectively eliminated defects of this type and significantly improved customer satisfaction.
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