Rolling Force Calculation for Strip Cold Rolling Based on Influence Function Method

2014 ◽  
Vol 633-634 ◽  
pp. 791-794 ◽  
Author(s):  
Hai Zhou ◽  
Jin Lan Bai
Keyword(s):  
Cold Rolling ◽  
Influence Function ◽  
Function Method ◽  
Rolling Force ◽  
Force Model ◽  
Strip Rolling ◽  
Influence Function Method ◽  
Roll Flattening ◽  
Calculation Results ◽  
Force Calculation

The rolling force calculation procedure of strip cold rolling is developed based on influence function method, with consideration of the couple of roll flattening model and rolling force model. With the procedure total rolling force and the distribution of rolling force per width of each pass for HC mill are calculated using sampling data obtained from actual strip rolling. Comparing the calculation results with actual measured value, it is shown that the calculated total rolling forces are similar to actual data, and the distribution of rolling force per width is consistent with the actual status. It proved that the calculation method introduced in this paper is an effective method to calculate rolling force, and it can be used in the process control of strip cold rolling mill.

AN INFLUENCE FUNCTION METHOD ANALYSIS OF COLD STRIP ROLLING

2008 ◽  
Vol 22 (31n32) ◽  
pp. 5728-5733
Author(s):  
Z.Y. JIANG ◽  
D.W. WEI ◽  
A.K. TIEU
Keyword(s):  
Cold Rolling ◽  
Influence Function ◽  
Function Method ◽  
Rolling Force ◽  
Work Roll ◽  
Thin Strip ◽  
Traditional Theory ◽  
Influence Function Method ◽  
New Findings ◽  
Strip Crown

An influence function method has been developed to simulate the asymmetric cold rolling of thin strip with work roll kiss at edges. The numerical simulation model was obtained based on the deformation compatibility of the roll system in rolling and lateral directions. The strip plastic deformation has been considered in the formulation, which is significantly different from the traditional theory of metal rolling. The rolling mechanics and crown of the strip with work roll edge kiss, which are new findings for cold rolling of thin strip, are obtained. A comparison of the rolling force, roll edge kiss force and the strip crown after rolling has been conducted for various cross shear regions in the roll bite. Results show that the calculated strip crown is in good agreement with Ameasured value, and the rolling force and strip crown decrease with an increase of cross shear regions, as well as the work roll edge kiss force and edge wear decrease. The friction also has an influence on the profile of the rolled thin strip.

Effect of Mid-Roll Shift on the Strip Flatness for CVC 6-H Mill

2014 ◽  
Vol 941-944 ◽  
pp. 1740-1743
Author(s):  
Dong Cheng Wang ◽  
Zhi Qun Wang ◽  
Hong Min Liu
Keyword(s):  
Influence Function ◽  
Function Method ◽  
Variation Method ◽  
Practical Application ◽  
Strip Flatness ◽  
Influence Function Method ◽  
Strip Shape ◽  
Calculation Results ◽  
Element Variation

In order to obtain the best position of mid-roll shift, this paper studies the effect of different mid-roll shift position on the strip flatness of CVC 6-H mill. Strip element variation method and influence function method are put forward to analyze the effect of mid-roll shift on strip flatness. The results show the CVC 6-H mill is able to get good strip shape. The best shift position is obtained from the calculation results. The conclusion has a good significance for the practical application.

Study of Rolling Force Calculation Models for Cold Rolling Process

2010 ◽  
Vol 154-155 ◽  
pp. 882-885
Author(s):  
Zhi Jie Jiao ◽  
Chun Yu He ◽  
Jian Ping Li ◽  
Xiang Hua Liu
Keyword(s):  
Friction Coefficient ◽  
Cold Rolling ◽  
Rolling Force ◽  
Rolling Process ◽  
Calculation Model ◽  
Deformation Resistance ◽  
Force Model ◽  
Practical Application ◽  
Hill Model ◽  
Force Calculation

For cold rolling process, the theoretical Bland-Ford-Hill model and Hitchcock model are used for the rolling force and roll flatten radius calculation. Friction coefficient and deformation resistance are calculated with empirical regression models. From rolling force model, the recalculation model for the friction coefficient and deformation resistance can be derived. After rolling, with actual measured data, friction coefficient and deformation resistance can be recalculated, and model parameter can be got by regression method. The practical application verifies that the accuracy of rolling force calculation model is good.

scholarly journals Predicting model of thickness distribution and rolling force in angular rolling process based on influence function method

2018 ◽  
Vol 19 (3) ◽  
pp. 302 ◽  
Author(s):  
Pujun Hao ◽  
Anrui He ◽  
Wenquan Sun
Keyword(s):  
Influence Function ◽  
Shape Control ◽  
Function Method ◽  
Rolling Force ◽  
Control Strategies ◽  
Thickness Distribution ◽  
Rolling Process ◽  
Influence Function Method ◽  
Customized Production ◽  
Two Sides

As a special rolling method, angular rolling can meet various gauge demands of customized production. Due to the asymmetry of angular rolling, the rolling forces on the two sides of the roll system are different and the thickness distribution of the plate will be complex. To accurately obtain the thickness distribution and predict the rolling force during the angular rolling process, a mathematical model based on the influence function method is developed. An experiment is also adopted to validate the results of the rolling force. The results show that the change in the total rolling force comprises three stages: increasing, stable, and decreasing. During most of the rolling time, the rolling forces on the two sides of the mill are different. Then the predicted results of the rolling force are validated by experiment. After the first pass of angular rolling, a serious wedge appears at the head and tail ends of the plate. But when the angular rolling is finished, the wedge has almost disappeared. Considering the short calculation time, this model can be applied in the actual production process for making effective shape control strategies and flexible rolling schedules to meet various gauge demands of customized production.

FEM Analysis of Profile Control Capability during Rolling in a 6-High CVC Cold Rolling Mill

2014 ◽  
Vol 988 ◽  
pp. 257-262 ◽  
Author(s):  
Ke Zhi Linghu ◽  
Zheng Yi Jiang ◽  
Fei Li ◽  
Jing Wei Zhao ◽  
Meng Yu ◽  
...  
Keyword(s):  
Cold Rolling ◽  
Rolling Mill ◽  
Rolling Force ◽  
Fem Analysis ◽  
Continuous Variable ◽  
Cold Rolling Mill ◽  
Strip Rolling ◽  
Roll Bending ◽  
Profile Control ◽  
Control Capability

A 3D elastic-plastic finite element method (FEM) model of cold strip rolling for 6-high continuous variable crown (CVC) rolling mill was developed. The rolling force distributions were obtained by the internal iteration processes. The calculated error has been significantly reduced by the developed model. the absolute error between the simulated results and the actual values is obtained to be less than 10μm, and relative error is less than 1%. The developed model is significant in investigating the profile control capability of the CVC cold rolling mill in terms of work roll bending, intermediate roll bending and intermediate roll shifting.

Development of a Mathematical Model of Plate Rolling on Hot Reversing Mills

2017 ◽  
Vol 746 ◽  
pp. 48-55
Author(s):  
Vasiliy V. Yashin ◽  
Evgenii V. Aryshenskii ◽  
Erkin D. Beglov ◽  
Maksim S. Tepterev ◽  
Anna F. Grechnikova
Keyword(s):  
Rolling Force ◽  
Work Roll ◽  
Calculation Model ◽  
Production Environment ◽  
Plate Rolling ◽  
Process Reliability ◽  
Calculation Results ◽  
Roll Gap ◽  
Relationship Of ◽  
Force Calculation

Objective of the work: develop a model for calculation of plate exit thickness. This model is supposed to improve process reliability in obtaining specified thickness with +/- 0.5 mm tolerance. The work identifies major influences on obtaining specified thickness and relationship of their effects. Based on derived relationships, the work develops rolling force calculation model with the following inputs: alloy grade, feedstock temperature, feedstock entry and exit gage, feedstock width, rotational speed of the rolls. Mill stand characteristics, like mill stiffness, backlash, work roll behavior, were studied in relation to force and temperature. The resulting model allows to predict the value of work roll gap increase during rolling. The model was validated in production environment and demonstrated high confidence level of calculation results.

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