Mechanics of roll edge contact in cold rolling of thin strip

Jiang, Zhengyi; Zhu, Hong Tao

doi:10.1016/j.ijmecsci.2006.01.017

Cited by 24 publications

(13 citation statements)

References 14 publications

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“…The value of 5.25 mm was experimentally obtained as the roll-bite length as against the value of 6.2 mm obtained with theoretical approach. 21 The reason for the difference between the theoretical and the experimental measured values could also be attributed to elastic recovery experienced by the strip during the rolling process.…”

Section: Determination Of the Roll-bite Lengthmentioning

confidence: 97%

Non-intrusive measurement of strip thickness and roll-bite length in metal rolling

Adeyemi

Dwyer-Joyce

Pinna

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part B:

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It is important to monitor the rolled strip thickness standard to minimize material waste and loss of profit due to strip flatness defects, and also to maintain the product’s size and dimensional homogeneity. Several online measurement techniques are available but none of this can give an in situ measurement within the roll bite. Due to this, a novice experimental method utilizing ultrasonic reflection sensor mounted on one roll was developed for in situ measurement of strip thickness and roll-bite length during cold rolling process. A pitch–catch method was used whereby a piezoelectric element generated an ultrasonic pulse and transmitted to the contact interface evaluated on a pilot mill. The reflected signal was captured by a second piezoelectric element and analysed to determine the condition at the strip–roll interface. This approach was implemented on a pilot mill and reflections from various locations in the roll bite during the rolling were recorded. Recorded signals were used to estimate the rolled strip thickness and roll-bite length after the rolling process.

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Section: Determination Of the Roll-bite Lengthmentioning

confidence: 97%

Non-intrusive measurement of strip thickness and roll-bite length in metal rolling

Adeyemi

Dwyer-Joyce

Pinna

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part B:

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“…Based on the numerical simulation, the effects of the friction on the specific forces, the work roll edge contact length, and the crown of the rolled strip in cold rolling are obtained. The strip surface roughness transfer and the effects of reduction on the edge contact length and roll edge wear are also discussed, which were not considered in the authors' previous work [22,23]. In particular, the measured wear of the roll in the special rolling of thin strip is presented for the first time and is one of the key issues in this paper.…”

Section: Introductionmentioning

confidence: 98%

Contact mechanics and work roll wear in cold rolling of thin strip

Jiang

2007

Wear

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“…Strip rolling technology has been further developing rapidly in recent decades thanks to the wide application of its products in a variety of fields, including manufacturing, construction and energy, wherein higher quality and productivity have been of great interest to the researchers and engineers in the field of metal forming [1][2][3]. For instance, Jiang et al [3,4] investigated the rolling force, intermediate force, roll edge contact force and wear condition, as well as the shape, profile and surface roughness of the rolled strip in response to various process parameters like reduction, rolling speed, initial strip thickness, using a combined numerical and experimental approach. Xie et al [5] carried out analytical and experimental investigations to identify the edge crack initiation and propagation during cold rolling of low carbon steel strip with the aid of Atomic Force Microscopy and Scanning Electron Microscopy, from which they found a lower friction coefficient, as well as a finer surface finish, would not only prevent the microcracks, but delay the crack-initiation process in rolled strip.…”

Section: Introductionmentioning

confidence: 99%

Finite Element Analysis of Forward Slip in Micro Flexible Rolling of Thin Aluminium Strips

Jiang

2019

Metals

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This study delineates a novel finite element model to consider a pattern of process parameters affecting the forward slip in micro flexible rolling, which focuses on the thickness transition area of the rolled strip with thickness in the micrometre range. According to the strip marking method, the forward slip is obtained by comparison between the distance of the bumped ridges on the roll and that of the markings indented by the ridges, which not only simplifies the calculation process, but also maintains the accuracy as compared with theoretical estimates. The simulation results identify the qualitative and quantitative variations of forward slip with regard to the variations in the reduction, rolling speed, estimated friction coefficient and the ratio of strip thickness to grain size, respectively, which also locate the cases wherein the relative sliding happens between the strip and the roll. The developed grain-based finite element model featuring 3D Voronoi tessellations allows for the investigation of the scatter effect of forward slip, which gets strengthened by the enhanced effect of every single grain attributed to the dispersion of fewer grains in a thinner strip with respect to constant grain size. The multilinear regression analysis is performed to establish a statistical model based upon the simulation results, which has been proven to be accurate in quantitatively describing the relationship between the forward slip and the aforementioned process parameters by considering both correlation and error analyses. The magnitudes of each process parameter affecting forward slip are also determined by variance analysis.

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Mechanics of roll edge contact in cold rolling of thin strip

Cited by 24 publications

References 14 publications

Non-intrusive measurement of strip thickness and roll-bite length in metal rolling

Non-intrusive measurement of strip thickness and roll-bite length in metal rolling

Contact mechanics and work roll wear in cold rolling of thin strip

Finite Element Analysis of Forward Slip in Micro Flexible Rolling of Thin Aluminium Strips

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