The Study of Proper Time Range Welding to Resistance Spot Welding for Mild Steel

This research use the mechanical property and macro testing to identify the proper time rang for current flow. The specimen tested was I mm. thickness in mild steel. The welded specimens were tested by Tensile Shear testing following JIS Z 3136: 1999 and Macro Structure testing following JIS Z 3139:1978 Subsequently, the analyzed data were compared with standard JIS Z 3140. The results show that the suitable current flow is 8 to 10 cycle tensile shear test5.33 kN to 6.39 kN nugget size 4.92 mm. to 5.66 mm.. It can be concluded that this technique can be applied to monitor the processes and the quality of resistance spot welding.