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A Novel Control Method of Resistance Spot Welding Inverter using Dynamic Resistance Characteristics for Weld Quality Improvement
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 Title & Authors
A Novel Control Method of Resistance Spot Welding Inverter using Dynamic Resistance Characteristics for Weld Quality Improvement
Kang, Sung-Kwan; Jung, Jae-Hun; Nho, Eui-Cheol;
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 Abstract
This study proposes a new control method for a resistance spot welding inverter to improve weld quality. The proposed method is based on the dynamic resistance characteristics of steel sheets to be welded. A point in the second peak value of the dynamic resistance occurs during one shot of the welding current flow. A constant voltage control is applied from zero to the peak point, and a constant current control is adopted from the peak point to the end of the shot. The mixed mode control of the constant voltage and current guarantees high weld quality. Experiments are conducted with a 5 kA power supply and 0.5 mm steel sheets to compare quality. Experimental results show that weld quality is improved more than 10 times that of the conventional control method.
 Keywords
Resistance spot welding;Weld quality;Dynamic resistance characteristics;
 Language
Korean
 Cited by
 References
1.
S. M. Cho, “Principle of resistance welding and analysis of monitoring results,” Journal of the Korean Welding & Joining Society, Vol. 15, No. 2, pp. 7-11, Apr. 1997.

2.
H. S. Cho, “Welding quality supervision and control resistance welding processes,” Journal of the Korean Welding & Joining Society, Vol. 18, No. 4, pp. 2-7, Aug. 2000.

3.
J. M. Kim, C. Y. Won, G. H. Choe, G. S. Kim, and H. S. Mok, “Implementation of dynamic resistance database for weld quality improvement of inverter spot welder,” The Transaction of Korean Institute of Power Electronics, Vol. 4, No. 3, pp. 294-303, Jun. 1999.

4.
J. M. Kim, J. D. Kim, C. Y. Won, G. H. Choe, G. S. Kim, and H. S. Mok, “Welding quality improvement of inverter spot welder by electrode movement control,” The Transaction of Korean Institute of Power Electronics, Vol. 5, No. 3, pp. 276-284, Jun. 2000.

5.
D. W. Dickinson, J. E. Franklin, and A. Stantya, "Characterization of spot welding behavior by dynamic electrical parameter monitoring," Welding research supplement, Vol. 59, pp. 170-176, Jun. 1980.

6.
S. A. Gedeon, C. D. Sorensen, K. T. Ulrish, and T. W. Eagar, “Measurement of dynamic electrical and mechanical properties of resistance spot welds,” Weld journal, Vol. 66, No. 12, pp. 378-385, Dec. 1987.

7.
J. M. Kim, L. H. Kim, B. G. Min, C. Y. Won, G. S. Kim, and S. W. Choi, “Variable power control of inverter spot welding machine using evolution algorithm,” The Transactions of The Korean Institute of Power Electronics, Vol. 7, No. 4, pp. 384-394, Aug. 2002.

8.
Y. J. Cho. S. H. Rhee, H. Shin, and K. M. Bae, “Charateriztion primary dynamic resistance in spot welding,” Journal of the Korean welding & joining society, Vol. 17, No. 2, pp. 159-164, Apr. 1999.