Liang X.-G.,CISDI Group Co. |
Liang X.-G.,Chongqing Iron and Steelmaking Engineering Research Center |
Wang Y.-K.,CISDI Group Co. |
Li K.,CISDI Group Co. |
And 4 more authors.
Suxing Gongcheng Xuebao/Journal of Plasticity Engineering | Year: 2011
A force model for plastic deforming zone was derived from Karman's equation considering the variation of yield stress in the deforming zone. To avoid complex integral solution, the plastic deforming zone was divided into a number of elements and the average rolling force of each element in forward slip zone and backward slip zone was calculated respectively. Then, the rolling force of the roll gap was obtained by adding the plastic and elastic force of all the elements, including the force at the entry elastic compression zone and exit elastic recovery zone. Calculation result shows that the time for calculating rolling force of a single pass is less than 30ms, the calculated value has high precision and 93.3% of the relative errors between calculated value and measured value for 2000 groups of calculating results lie within ±10%, so it can fully meet the requirements of online control in cold rolling.
Liang X.-G.,Chongqing Iron and Steelmaking Engineering Research Center
Kang T'ieh/Iron and Steel | Year: 2014
An elastic deformation model for the roll stack of six-high cold rolling mill was built based on the influence function method. The factors affecting the optimum bending force such as specific rolling force and intermediate roll shifting were analyzed theoretically, and a more reasonable bending force preset model was established. Meanwhile, a simplified preset model of intermediate roll bending force was built according to the relationship between the intermediate roll bending force and the work roll bending force, which can reduce the difficulty of commissioning and maintenance. On-site application results show that the preset model has high precision and only 5.25% of the deviation between the preset and the measured bending forces was out of the range of ±20%.