DefinePK

Abstract

The study is to find the optimum weld parameter in a 3-layer spot welding. The materials used in this research are the most common materials found in the body of a car, which were galvanneal, SPCC and Advanced High Strength Steel (AHSS). The stacking orientation of the materials were done similar to the stacking orientation in a side structure assembly of a car. Full factorial DOE method were conducted, using 3 factors with 2 levels. The factors were of 3 different parameters; weld current weld time and electrode pressure. The responses used were nugget size and tensile strength. The results had shown that the most important factor which affect the nugget size and tensile strength was weld current, followed by weld time and electrode pressure. The optimum weld parameter for the 3-layer spot welding was also obtained, which were 10kA, 20 cycles and 2.0bar for the weld current, weld time and electrode pressure.