Study on quality of resistance spot welded aluminum alloys under various electrode pressures

Abstract

The electrode force is one of the main parameters in resistance spot welding (RSW). It is very important to guarantee the quality of aluminum alloys and determine whether the electrode pressure is stable or adjustable in the welding process. With the drive set of a servo-motor, we conduct the RSW tests and tensile shear tests on the 5052 aluminum alloy sheets. Results of these tests show that all variable pressure curves are suitable for spot welding, and all have their own rules in affecting the tensile strength of the spot welded joints.

Keywords

electrode pressure / resistance spot welding (RSW) / saddle-shaped curve / aluminum alloy

References

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Acknowledgements

This research was supported by the National Natural Science Foundation of China (Grant No. 50575159), Project of Chinese Ministry of Education (Grant Nos. 106049, 20060056058), the Natural Science Foundation of Tianjin (06YFJMJC03400), and Project of Industry-University-Resarch combined of Guangdong Province Ministry of Education (2007A0903021050).

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2014 Higher Education Press and Springer-Verlag Berlin Heidelberg