Harmonic current’s coupling effect on the main motion of temper mill set

Abstract

The paper probes into a probable condition that causes temper mill chatter from aspect of electromechanical coupling of complex electromechanical system, and mainly studies the effect of temper mill electrical driving system harmonic current on the main motion of temper mill set. Aiming at the electrical driving system of CM04 temper mill, the effect of harmonic current is analyzed and evaluated according to different load. Combining the features of CM04 temper mill’s structure and its working state, the paper discusses in every detail how the harmonic current in main circuit, which can be regarded as a disturbance via feedback control circuit, influences main motion of temper mill set.

Keywords

electromechanical coupling / temper mill / harmonic current / rolling mill chatter

References

[1] QiuJia-junElectromechanical analysis dynamics (in Chinese) [M], 1992, Beijing, Science Press

[2] LiLiQuantitative theory and qualitative method of strong nonlinear vibrating system (in Chinese) [M], 1997, Beijing, Science Press

[3] QiuJia-jun. The transverse and torsional vibration of alternating current machines in the starting process[J]. Acta Mechanica Sinica, 1988, 4(1): 45-58

[4] QiuJia-jun. Nonlinear vibration of high-dimension electromechanical coupling system[J]. Transaction of Vibration Engineering, 1994, 7(2): 133-143

[5] ZhuMei-hua, LiJun-hong, ZhouWen-xian, et al.. Torsional vibration mensuration of main driving system of fine rolling mill in pan steel heat rolling factory[J]. Technology of Pan Steel, 1998, 21(3): 59-62(in Chinese)

[6] YANG Qi-jun, LIAN Jia-chuang, DUAN Zhen-yong. Numerical analysis of stability on vertical vibration of clod-strip steel rolling mill[J]. Heavy Mechanism, 1995(5): 15–20.

[7] SUN Zhi-hui, ZHOU Jia-xiang. Rolling lubrication friction’s influence on cold mill chatter[J]. Heavy Mechanism, 1998(6): 25–27.

[8] John J Gasparic. Vibration analysis identifies the causes of mill chatter[J]. Iron and Steel Engineer, 1991. 27–29.