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| Torsional Vibration Analysis of Rougher Main Driving System of Rolling Mills |
| ZHOU Jinyu1，CHEN Zhanfu2 |
| 1. School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China; 2. Hot Rolling Plant, Baoshan Iron and Steel Co., Ltd., Shanghai 200941, China |
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Abstract The analytic model and dynamic response solution for torsional vibration of main driving system on rougher of rolling mill were studied. The circumferential backlash between the roll and the driving side of the main driving system,which can enlarge the amplitude of the displacement owing to torsional vibration was considered in analysis. According to the rule of backlash opening and closing during biting, a new numeric method based on an advanced 4order RungeKutta algorithm was put forward and used to simulate dynamic response to torsional vibration of the main driving system. The computer simulation of torsional vibration of main driving system of R2 rougher for Baosteel 2050 mm hot rolling mill was carried out. The result of simulation shows that the backlash is open if velocity of the blank exceeds the horizontal component of circular velocity of the roll and torque amplification factors is increased by 4~20 percent. when the backlash is closed.
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Received: 01 January 1900
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2007, Vol. 42 
