Analysis of Wall Thickness Eccentricity in the Rotary Tube Piercing Process Using a Strain Correlated FE Model

Murillo-Marrodán, Alberto; García, Eduardo; Barco, Jon; Cortés, Fernando

doi:10.3390/met10081045

Cited by 16 publications

(8 citation statements)

References 27 publications

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“…Some authors use some simplifications to simulate Mannesmann piercing process. Murillo-Marrodán et al, 10,11 in their work on the modelling of the rotary piercing process, used a billet with a small hole along its length, which was intended to facilitate the separation of material on the plug. The modelling results obtained in this way had a high agreement with experimental studies.…”

Section: Introductionmentioning

confidence: 99%

Assessment of the possibility of quantitative identification of the Mannesmann effect using ductile fracture criteria

Bulzak,

Wójcik,

Lis

et al. 2024

Numerical Meth Engineering

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This article presents a study to estimate the possibility of determining the shape and size of a Mannesmann effect crack using the finite element method. Experimental tests were carried out to obtain reference specimens with a crack. A rotational compression test of cylindrical specimens in a channel was used for the experimental studies. Finite element tests were carried out using nine ductile fracture criteria. In the first stage of the study, using the rotational compression test and the finite element method, the limit values of the fracture criteria were determined. In the second stage, the development of a Mannesmann effect crack was simulated using the limit values of the fracture criteria using the finite element method. Based on the analysis, it was found that the greatest agreement in terms of void shape and size obtained in finite element method and experiment was obtained for the Ayada criterion. Analysis of the progression of the shape of the void formed using the Ayada criterion showed that crack initiation occurs as a result of maximum principal stress. The development of the resulting void is the result of the action of the maximum shear stress as well as the maximum principal stress.

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Section: Introductionmentioning

confidence: 99%

Assessment of the possibility of quantitative identification of the Mannesmann effect using ductile fracture criteria

Bulzak,

Wójcik,

Lis

et al. 2024

Numerical Meth Engineering

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show abstract

“…Accordingly, important research efforts have been dedicated to improve the geometrical accuracy of the final product. In fact, these effects are not exclusive of this rolling mill, since they can be generated even in piercing phase [6], and elongation in mandrel mill [7].…”

Section: Introductionmentioning

confidence: 99%

Detailed study of tube hot rolling process by means of FEM

GIL

2023

Materials Research Proceedings

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Abstract. In this paper seamless tubes hot manufacturing calibration rolling is studied by means of a finite element model, to improve product quality and process performance. Based on real data provided by an industrial partner, Tubos Reunidos Group, a finite element model of the process has been created and validated for the thermo-mechanical analysis of the process. The model has been used for the study of the wall thickness evolution and peripherical distribution during process, the eccentricity and the polygonization effects. Results show that the tube velocity in the process is one of the factors affecting wall thickness eccentricity, due to mass flow conservation. Regarding polygonization and eccentricity effect it has been found that both effects increase in the rolling stands with higher reduction ratio, and are corrected afterwards. These effects are mainly due to the ovality of the rolls. However, the effect the different sliding velocity along roll perimeter has implications in the local deformation of the material in contact with the roll, causing local compressive stress areas in addition to the predominant tension areas.

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“…Several categories of investigation, depending on the research direction and estimated parameters, can be detected among publications concerning piercing in two-high screw rolling mills. One such category is the estimation of the loads and energy parameters of the screw piercing process [ 9 , 12 , 13 , 14 ], including the loads on the plug and rolls. One more trend is research on axial fracture, the so-called Mannesmann effect [ 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Hardness of Hollow Tube Shells at Piercing in Two-High Screw Rolling Mill with Different Plugs

et al. 2022

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AA6060 ingots were pierced in a two-high screw rolling mill (MISIS-130D) with guiding shoes (Mannesmann mill type). Three different plugs, i.e., a conventional entire plug, a plug with a cavity, and a hollow plug, were used for piercing. We established that the grain size decreases after piercing, by order of magnitude, compared to the initial non-pierced annealed bill, with a grain size of 100–400 μm, and the hollow shell grains are elongated along the piercing direction. The produced hollow shells had 30% higher hardness than the initial billet. The highest hardness values were obtained after piercing the conventional entire plug. The most uniform hardness distribution through the hollow shell’s volume was obtained after piercing the hollow plug. The cross and longitudinal section hardness measurements demonstrate that the hardness decreases from the outer surface to the inner surface of the hollow shells.

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Analysis of Wall Thickness Eccentricity in the Rotary Tube Piercing Process Using a Strain Correlated FE Model

Cited by 16 publications

References 27 publications

Assessment of the possibility of quantitative identification of the Mannesmann effect using ductile fracture criteria

Assessment of the possibility of quantitative identification of the Mannesmann effect using ductile fracture criteria

Detailed study of tube hot rolling process by means of FEM

Microstructure and Hardness of Hollow Tube Shells at Piercing in Two-High Screw Rolling Mill with Different Plugs

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