メッキ鋼板におけるスポット溶接条件の最適化

抄録

Welding is a method often used to join steel sheets to gether. In this report, a spot welding process was studied. Test pieces were prepared using zinc plated steel sheets with a good electric cconductivity. Load was added to welded pieces and was considered as the output. Displacement was measured and treated as the input. Electrode wear was used as a noise factor. SN ratio was calculated and then optimized. In the early experiment, an L18 orthogonal array was used. Since there were significant interactions between factors, control the confirmed gain was less than 20% of the predicted gain.

In the next experiment using an L9 orthogonal array, the sliding level technique was used. The results showed the confirmed gain was almost 70% of the predicted gain.