Energy storage multi-pulse spot welding time

Can a three-pulse and step increment welding current improve mechanical performance?

In addition, microstructure observation for the welds of item 4 experiment were conducted by metallurgical experiments, and the results also showed that the RSW operation using three-pulse and step increment welding current can obtain weld with better mechanical performance than that using constant welding current.

Does a three-pulse and step increment welding current increase lap-shear strength?

If IF occurred, the lap-shear strength of the RSW processes using three-pulse and step increment welding current was significantly larger than that using constant welding current, while the improvement percentages were 29.67, 35.68, 17.81 and 15.38%.

Can multi-pulse pulse be used in joining metal sheets by RSW process?

These relative works revealed that the multi-pulse or step current pulse had been applied in joining metal sheets by RSW process, and gained some significant achievements.

Does cooling time affect AHSS welding efficiency?

Hence, adding the cooling time can deteriorate the welding efficiency. This work can supple important references for designing more appropriate welding schedule for AHSS, which can improve the mechanical performance of welded joints and welding efficiency of the RSW process.

Does welding current affect Nugget size?

By means of comparing the temperature contours of the parent metal sheets of the RSW processes using two types of welding currents, the temperature of the center of the parent metal sheet by using three-pulse and step increment welding current was larger than that using constant welding current, also, it corresponded to larger nugget size.

Does cooling time affect welding efficiency?

The effect of cooling time on the RSW process were also considered. Though the peak temperature had so small difference, the nugget diameter and lap-shear strength were decreased. Hence, adding the cooling time can deteriorate the welding efficiency.