Analysis of Computational Model of Seamless Steel Pipe Rolling Contact Force

Due to the problems that the rolling force of seamless steel tube during tandem rolling process is affected by many factors, the calculation is complex and the accuracy is not enough. In order to improve the rolling force calculation accuracy of the tandem rolling mill, analyze the metal flow, stress distribution rules and cross section deformation characteristics during the rolling process of seamless steel tube, calculation of the rolling force was divided into the reduced-diameter area and the reduction of wall area, and a new calculation method was proposed, which concerns the rolling force in reduced-diameter area related to the material yield stress, friction coefficient and the crushing stress of the tube, while the rolling force in the reduction of wall area is only related to the material yield stress and the friction coefficient. The results show that the calculated rolling force is in agreement with the measured values with errors less than ±10%. The model satisfies the actual conditions and is applicable to engineering application.

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Finite Element Simulation Analysis of Multi-Stands Three-Roller Cold Rolling Process for Double Metal Composite Seamless Steel Tube

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.470.197 ◽

2013 ◽

Vol 470 ◽

pp. 197-204 ◽

Cited By ~ 5

Author(s):

Xian Kang Wang ◽

Jin Duo Ye ◽

Xu Ma ◽

Qian Qian Tian ◽

Xue Li ◽

...

Keyword(s):

Numerical Simulation ◽

Finite Element ◽

Cold Rolling ◽

Rolling Process ◽

Steel Tube ◽

Metal Composite ◽

Element Analysis ◽

The Finite Element Analysis ◽

Seamless Steel Tube ◽

Seamless Steel

The numerical simulation of the Y-type three-roller two stands cold rolling stainless steel/carbon steel double metal composite seamless steel tube process was conducted through the finite element analysis of the elastic-plastic by applying the MSC.MARC software. Based on the numerical simulation, the character of stress and strain distribution parameters during the Y-type three-roller two stands cold rolling were obtained by the finite element analysis, and acquired the section pass deformation figure. The distribution of the axial stress, circle stress and radial stress were drawn below the Y-type mill along the circle. The mechanism of the tube cold rolling process and the effect of the forming steel tube both the diameter and wall thickness accuracy were explained according to the stress distribution. The results of the research can be applied to the design of the technical parameters in the forming process.

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Study of Rolling Force Calculation Models for Cold Rolling Process

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.154-155.882 ◽

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.

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Influence of Roll Speed Schedule on Transverse Wall Thickness Evenness of Shell Elongated by Mandrel Mill

Materials Science Forum ◽

10.4028/www.scientific.net/msf.654-656.1311 ◽

2010 ◽

Vol 654-656 ◽

pp. 1311-1314 ◽

Cited By ~ 2

Author(s):

Sheng Zhi Li ◽

Zhi Chao Zhang ◽

Hai Yan Bao ◽

Zhi Yang Zhou

Keyword(s):

Wall Thickness ◽

Rolling Process ◽

Steel Tube ◽

Transverse Wall ◽

Data Reliability ◽

Continuous Rolling ◽

Roll Speed ◽

Seamless Steel Tube ◽

The Relationship ◽

Seamless Steel

The seamless steel tube continuous rolling process with 8-stand full-floating mandrel is simulated with the aid of commercial FE code MSC. SuperForm. The relationship is analyzed between the distribution of the transverse wall-thickness and the speed schedule of the rollers. The result shows that the transverse evenness of the wall thickness of the tubes can be enhanced by optimizing the speed schedule. Furthermore, by adopting meliorated method to measure the wall-thickness of the shell, the error is reduced while data reliability is increased. When using the existing equipments (mandrel mill), it is an effective way to improve the transverse wall-thickness accuracy of the shell tube by adjusting the speed schedule. Compared with present roll speed schedule, the transverse wall-thickness accuracy can be increased by 10% for the rolling of elongated shell with 152.5mm in OD and 6mm in wall thickness tube under the 3# speed schedule put forward in this paper.

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