Time filter

Source Type

Shao J.,University of Science and Technology Beijing | Yao C.-H.,University of Science and Technology Beijing | He A.-R.,University of Science and Technology Beijing | Yang Q.,University of Science and Technology Beijing | And 2 more authors.
Gongcheng Kexue Xuebao/Chinese Journal of Engineering | Year: 2015

The setup of subsection cooling is usually based on the experience of technicians and operators, lack of theoretical basis. So, a two dimensional temperature field model of work roll was established using the alternating difference method. Based on the prediction of the change of thermal contours during threading, an iteration algorithm was developed to get the basic pattern for the setup model, under which the thermal contour could be maintained. RBF neural network was established to predict the strip profile by giving quadratic and quartic profiles, and with fuzzy inference, adjustment of the basic pattern was determined based on the predicted profile error. Combining the prediction of thermal model and profile model, the final setup pattern was obtained, under which the thermal contour can be effectively controlled to reduce the profile error during threading. © All right reserved.


Guo X.,University of Science and Technology Beijing | He A.,University of Science and Technology Beijing | Shao J.,University of Science and Technology Beijing | Zhou B.,Guangxi Liuzhou Yinhai Aluminum Co. | Li Q.,Guangxi Liuzhou Yinhai Aluminum Co.
Jixie Gongcheng Xuebao/Journal of Mechanical Engineering | Year: 2013

In order to study the relationship between the subsectional cooling system and section shape of aluminum strip, a temperature field model has been built based on the alternating finite difference method. With the model, issues such as work roll thermal contour under different cooling water distributions, quantitative relationship between cooling water and thermal crown, and the evolution of thermal crown when changing cooling water have been researched. The results shows that subsectional cooling system has a strong control ability of local thermal expansion; when the width of aluminum strip is 1500 mm, the relation between cooling water and thermal crown is quadratic; and the changing rate of thermal crown is independent with the amount of cooling water. Based on the conclusions above, work roll thermal expansion can be controlled quantitatively by the cooling water, accordingly providing an effective way of controlling section shape of aluminum strip. © 2013 Journal of Mechanical Engineering.


Shao J.,University of Science and Technology Beijing | He A.-R.,University of Science and Technology Beijing | Yang Q.,University of Science and Technology Beijing | Jiang L.,University of Science and Technology Beijing | And 2 more authors.
Gongcheng Kexue Xuebao/Chinese Journal of Engineering | Year: 2015

A coupled heat transfer model of work rolls and an aluminum strip is established to obtain the multi-parameter coupled subsection cooling regulation characteristics of work rolls in aluminum cold rolling. This coupled model includes building the thermal conduction differential equation of the work rolls and strip, solving the strip deformation heat and friction heat, establishing the heat transfer boundary conditions, calculating the work roll thermal crown, and solving the differential equations by using a two-dimensional alternating difference method. Simulation results show that the positive and negative adjustment domains are approximately equal at the same rolling parameters, but each domain is affected by rolling parameters. The increase of rolled length, header pressure and friction coefficient has positive effect on the subsection cooling control ability, while the rolling speed is on the contrary. © Copyright.

Loading Guangxi Liuzhou Yinhai Aluminum Co. collaborators
Loading Guangxi Liuzhou Yinhai Aluminum Co. collaborators