Question

29.7 Quality problems are occurring in a resistance spot-welding operation in the fabrication of steel containers. The steel is 2.4-mm (0.094-in) thick low-carbon sheet steel. The main problem is incomplete fusion of the spot welds, in which the weld nuggets are very small and susceptible to separation. In some cases, weld nuggets do not even form. Without knowing any more about the operation, make several recommendations that might solve the problem.

Answer 1