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J Mater Sci Technol  2004, Vol. 20 Issue (04): 454-456    DOI:
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Model Building of Backup Roller Diameter Effect Rate in 4-High Mill
Jianzhong XU, Dianyao GONG, Xianghua LIU, Guodong WANG, Xiaolin ZHAO
State Key Lab. of Rolling and Automation, Northeastern University, Shenyang 1100004, China
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Abstract  Software for calculating the strip profile in 4-high hot rolling mill was developed using influence coefficient method. Regularity of backup roller diameter effect rate was studied systematically using the software. The results show that backup roller diameter effect rates decrease versus the increase of strip width, increase significantly versus the increase of backup roller diameter and obscurely increase versus the increase of reduction. The difference between backup roller diameter effect rate and it is reference value increases versus strip width increasing. When backup rollers diameter is set to be 1.64 m and strip width is 1.85 m, the error of strip profile calculated using the model of backup roller diameter effect rate reference value will be 3.55 μm. Based on the results, reference values of roller diameter effect rate and six power polynomial fitting coefficients of modification coefficients were determined considering coherent parameters. The high precision model of backup roller diameter effect rate was established. When the model is used to predict strip profile, the accuracy is less than 5.0 μm.
Key words:  4-high mill      Influence coefficient method      Strip profile      Hot rolling...      
Received:  01 January 1900     
Corresponding Authors:  Dianyao GONG     E-mail:  dygong@21cn.com

Cite this article: 

Jianzhong XU, Dianyao GONG, Xianghua LIU, Guodong WANG, Xiaolin ZHAO. Model Building of Backup Roller Diameter Effect Rate in 4-High Mill. J Mater Sci Technol, 2004, 20(04): 454-456.

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