2250CVC热连轧机支持辊辊形研究

Backup roll contour of 2250 CVC hot strip mill

针对2250 CVC热连轧机支持辊磨损严重、不均匀且出现剥落问题,提出与2250热连轧机CVC工作辊相匹配的支持辊新辊形CVR(CVC-VCR Compounded Roll),采用通用有限元软件ANSYS建立辊系三维弹性变形模型,并在F3机架上进行工业轧制试验。研究结果表明:与原辊形配置相比,CVR辊形配置不仅增加了弯辊力的调控范围,辊缝横向刚度增加11.5%以上,而且轧制过程服役前期和后期的辊间压力分布不均匀度分别降低28.17%和29.1%,辊间压力峰值分别下降27.56%和24.49%;新支持辊CVR自保持性较好,可稳定发挥其性能。

Based on the fact that the backup roll for 2250 CVC tandem mill in hot rolling has serious and non-uniform wear, and the edge spalling often happens, a new backup roll contour named CVR（CVC-VCR Compounded Roll） was proposed, which was designed for the CVC work roll of 2250 hot rolling mill. By adopting the ANSYS software, a three-dimensional finite element roll elastic model was built. The test on the No.3 stand of the large industrial mills was made. The result shows that in comparison with the original roll contour, the adjustment scope of bending force enhances and the roll gap stiffness increases by above 11.5%. Moreover, the non-uniform level of roll contact pressure in the prophase and anaphase rolling service drops by 28.17% and 29.1% separately, and the peak value of roll contact pressure descends by 27.56% and 24.49%, respectively. The CVR contour has good self-maintenance and is capable of exerting itself stably.