Effects of tension levelling process parameters on cold rolled strip characteristics using a designed factorial analysis approach

Morris, J. W.; Hardy, Stephen; Thomas, Jimmy

doi:10.1179/174328105x48089

Cited by 8 publications

(5 citation statements)

References 10 publications

(10 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Meanwhile, the roles of strain and state-of-strain on particle fracture and grain size control have been developed to be applied to Mg alloy and Al alloy [18,19]. Therefore, it is of great significance to determine the parameters of the straightener and straightening process and explore the variation law of corrugated interface morphology [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Interface Morphology of Mg/Al Corrugated Composite Plate in the Straightening Process

Xing

Liu

et al. 2022

Materials

View full text Add to dashboard Cite

The Mg/Al composite plate was developed in aerospace and other fields. At present, through the corrugated rolling method, the bonding strength of Mg/Al composite plate could be increased and the warpage could be reduced. However, this still requires the straightening process to reach the parameters’ range. In this work, the original interface morphology of Mg/Al corrugated composite plate was obtained by experimental characterization. Based on the principle of elastoplastic mechanics, the equations of straightener parameters and straightening process parameters were obtained and the influencing factors were deduced. So, the straightening model was established in an Abaqus. The effects of straightener parameters and straightening process parameters on the interface morphology were analyzed and the interface morphology was expressed by amplitude and period length of the equation. The results showed that bending moment, shear strength and the reduction of second roll played roles on the interface morphology. After the first straightening unit, the amplitude increased by 1.1% and the period length increased by 3%. Finally, a complete straightening parameter was designed, which included straightener parameters, straightening process parameters and straightening temperature. The aim of this work was to provide a theoretical basis for establishing a high precision Mg/Al corrugated composite plate straightening model, which could improve the bonding strength while ensuring the straightening effect.

show abstract

Section: Introductionmentioning

confidence: 99%

Investigation on the Interface Morphology of Mg/Al Corrugated Composite Plate in the Straightening Process

Xing

Liu

et al. 2022

Materials

View full text Add to dashboard Cite

show abstract

“…But not only numerical calculations are expedient, analytical models can help as well to provide information concerning the infeed of the straightening rolls, as shown in [9][10][11][12]. [13] shows the impact that the different adjustable machine rolls have, and demonstrates that the second adjustable roll of the often used seven roll straightening machine has the most impact on curvature, and, consequently, the straightening process. In order to use the calculation results and to straighten a steel strip, an electro-mechanical automated straightening machine is required.…”

Section: Intr Introduction Oductionmentioning

confidence: 99%

Innovative Measurement Of Stress Superposed Steel Strip For Straightening Machines

Bader¹,

Bathelt²,

Djakow³

et al. 2021

Esaform 2021

View full text Add to dashboard Cite

Higher quality requirements by customers demand higher precision and accuracy from manufacturing processes. Application oriented preparation of semi-finished materials is key for subsequent forming operations, therefore, straightening machines are employed. Straightening strengthens the material by increasing plastic deformation by means of strain hardening, resulting in undesirable reduction in formability when processing high strength materials, in particular. Conventional roll-type straightening machines process either bars or strips. This is achieved upon passing material between rolls arranged in two staggered rows. However, conventional straightening processes do not adapt to the local varying distortion of coiled strips. Innovative, self-correcting process control techniques, which adapt to the initial geometric characteristics of the strip, present a promising approach to fix this issue through optimization of the leveling process. Here, an innovative strategy to improve straightening of high strength steel materials (1.4310) is presented. This implements optimized leveling, adding minimal plastic deformation and, thus, strain hardening. To operate an intelligent straightening machine, a reliable online measurement of the surface defects is fundamentally essential. The MagnaTest, which is developed for material testing, is made feasible for such purposes after calibrating for curvature measurement. Preliminary results are promising in regards to measuring the curvature online, so that the following straightening process can be close loop controlled. The bending measurement is linked to open/closed loop control, therefore providing an optimal straightening result in regards to formability, leveling, and reduced strain hardening.

show abstract

“…To ensure flatness of the metal strip, it has to be exposed to high tension. This process is called tension leveling [5]. It results in flattening of the metal sheet by controlled flexing, usually when passing over an adjustable roll at high tension [6].…”

Section: Introductionmentioning

confidence: 99%

Distribution of the Strip Tensions with Slip Control in Strip Processing Lines

Magura¹,

Kyslan

Padmanaban

et al. 2019

Energies

View full text Add to dashboard Cite

The control of tension in processing lines for metal strips tackles several problems. The process of achieving high tension driven by a multi-motor drive system, where the motors are mechanically coupled by a strip, is affected by the maximal torque of each drive, by friction between the strip and the surface of the tension roll, and by the wrap angle. The friction itself and the wrap angle are described by the e µα factor, which can be also calculated as the ratio of tensions in the strip in the previous section and subsequent section of the multi-motor drive. In this paper, an algorithm for the proper distribution of tensions in the strip for a multi-motor drive system of a continuous processing line is revealed. The algorithm ensures the tension distribution among particular drives of the tension leveler while respecting the physical limits of the drives and also preserving the desired conditions of a constant ratio between the input and output tensions for all drives in the leveler. The algorithm also prevents overloading of the drives. Finally, the algorithm was implemented in a control system of a strip processing line, and the obtained results correspond with the simulations. This, in turn, confirms the correctness of the algorithm design.

show abstract

Effects of tension levelling process parameters on cold rolled strip characteristics using a designed factorial analysis approach

Cited by 8 publications

References 10 publications

Investigation on the Interface Morphology of Mg/Al Corrugated Composite Plate in the Straightening Process

Investigation on the Interface Morphology of Mg/Al Corrugated Composite Plate in the Straightening Process

Innovative Measurement Of Stress Superposed Steel Strip For Straightening Machines

Distribution of the Strip Tensions with Slip Control in Strip Processing Lines

Contact Info

Product

Resources

About