Steel bridges: new steels and innovative erection methods

Fukumoto, Yuhshi; Nagai, Masao

doi:10.1002/(sici)1528-2716(200001/03)2:1<34::aid-pse5>3.0.co;2-o

Cited by 11 publications

(3 citation statements)

References 10 publications

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“…Variable gauge rolling is a new technology designed to produce flat products with different thicknesses, such as longitudinal profile (LP) plates and tailor rolled blanks (TRB) . LP plates are market potential steels used in bridges (as shown in Figure ), architecture, and shipbuilding, etc., that are produced by adjusting the gap between the rolls during rolling. LP plates have advantages, such as weight savings, welds in areas with less load, fewer welded joints (as shown in Figure ), the avoidance of expensive bolted joints, and savings in the cost of fabrication, lower maintenance costs, and optimizing the matching of steel cross section to actual stresses.…”

Section: Introductionmentioning

confidence: 99%

The Wave Motion of the Rolling Force during Variable Gauge Rolling

Lü

Zhu

et al. 2013

steel research int.

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The variable gauge rolling process is a new technology designed to produce flat products of different thicknesses such as longitudinal profile (LP) plates and tailor rolled blanks (TRB), which are used in bridge building, shipbuilding, and automobile manufacturing, etc., to decrease the weight and the welding times, etc. In this paper, a series of numerical studies on the wave motion of rolling force in variable gauge rolling (in three stages: down rolling, flat rolling, and upper rolling) were carried out using the finite element method to obtain the deformation of the work piece at different stages of rolling. The rolling force and its wave motion during rolling were analyzed under a variety of reduction ratios, including the coefficient of friction, initial thickness of the plates, and diameters of the rolls. The rolling force obviously increases as the reduction in the down rolling process increases, and then decreases during upper rolling. The rolling force consists of two abrupt wave motions in the transitional zones during the down to flat rolling stage, and the flat to upper rolling stage. These results are significant with regards to precisely controlling the deformation of workpiece in the transition zone during variable gauge rolling.

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Section: Introductionmentioning

confidence: 99%

The Wave Motion of the Rolling Force during Variable Gauge Rolling

Lü

Zhu

et al. 2013

steel research int.

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“…Variable gauge rolling has been widely used in Mizushima Automatic Plan View Pattern Control System rolling (MAS rolling) [9], Tailor Rolled Blank (TRB) [10], Longitude Profile (LP) hot rolling [11], and Flying Gauge Change (FGC) [12]. To compensate for the irregular shape of the workpiece in medium plate rolling, the MAS rolling method is adopted to improve the shape in the middle pass.…”

Section: Open Accessmentioning

confidence: 99%

Prediction and Analysis of the Force and Shape Parameters in Variable Gauge Rolling

Liu

Wang

et al. 2022

Chin. J. Mech. Eng.

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Variable gauge rolling is a new process to obtain a plate for which the thickness changes continuously by continuously and dynamically adjusting the roll gap upward and downward in the rolling process. This technology is an effective method for producing lightweight, low-cost, and economical plates. However, variable gauge rolling is an unsteady process, and the changes in the force and deformation parameters are complex. In this research, based on the minimum energy theory of the variational principle and considering the characteristics of the roll movement and workpiece deformation comprehensively, the internal plastic deformation, friction, shear and tension powers, and the minimum result of the total power functional in upward and downward rolling are obtained with the first integral and then with a variation of adopting the specific plastic power and strain rate vector inner product. The analytical results of the deformation and force parameters are also established using the variational method. Then the precision of this model is certified using the measured values in a medium plate hot rolling plant and the experimental data for Tailor Rolled Blank rolling. Good agreement is found. Additionally, the variation rule of bite angle, neutral angle, and location neutral points are shown, and the change mechanism of the friction parameter on the stress state effect coefficient is given in variable gauge rolling. This research proposes a new mathematical model for rolling process control that provides a scientific basis and technical support for obtaining an accurate section shape in variable gauge rolling production.

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“…Depending on manufacturing methods, dimensions and applications, flexibly rolled strip can be divided into three categories, as shown in Table 1. These include longitudinal profile plate, produced by hot rolling and widely used in bridge and shipbuilding 8,9 , and tailor rolled blanks, which are usually used in load-optimised lightweight structural parts for automotive applications 10,11 such as hang-on parts, including doors, hoods and roof panels 12 . By comparison, thin varying thickness strip is used mainly for microscale products in many industrial applications and, in particular, for electronic components in micro-system technologies 13,14 and micro-electromechanical systems 15 .…”

Section: Introductionmentioning

confidence: 99%