Simulation of Rotary Piercing Process

Богатов, А. А.; Нухов, Д. Ш.; Toporov, V. A.

doi:10.1007/s11015-017-0460-6

Cited by 11 publications

(6 citation statements)

References 1 publication

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“…Making a helical movement, and, getting in the contact area of the billet with the rollers, the metal particles form a local deformation zone, which is characterized by the following parameters: r0 -the radius of the billet; r1 and r10 are the radiuses of the billet at inlet and exit of the local deformation zone; b -the width of the contact area of the billet with the rolls and the absolute reduction of the billet in the local deformation zone Δr = (r1-r10) (Fig. 1b) [16]. In this research, the problem of determining the geometric relations in the billet piercing in accordance with the piercing mill tool setting was solved.…”

Section: Methodsmentioning

confidence: 99%

“…But it is worth noting that most researchers are limited to the search of geometric relations of the deformation zone without considering the shape change of the billet in the local areas of deformation zones [7][8][9][10][11][12][13][14][15]. Professor A.A. Bogatov, together with the co-authors [16] developed and scientifically justified method of study of the billet shape change, which considers the complexity of the metal movement in the longitudinal and transverse directions of the deformation zone during helical piercing.…”

Section: Introductionmentioning

confidence: 99%

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Computer-Simulation of the Billet Shape Change during Helical Piercing

Toporov

Богатов²,

Нухов

2020

SSP

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In this paper the task of the study of the deformation during helical piercing of the metal was set and solved with the use of the DEFORM-3D software. Methodology, that allows to calculate the length of helix lead along the deformation zone, as well as determine for each lead absolute and relative reduction, the width of the contact area and the metal strain refinement indicator was developed. Based on the developed methodology application the following variation regularities were established: helix lead length (li), quotient reduction (Δr/r0), ratio of the billet radius to the width of the contact area (r0/b), as well as the length of the billet contact surface (l0) with the roll in dependence of the feed angle (β), the roll number of revolutions (N) and the plug nose advancement over the gorge (Cg).

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Computer-Simulation of the Billet Shape Change during Helical Piercing

Toporov

Богатов²,

Нухов

2020

SSP

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“…In severe cases, as depicted in Fig. 1c, the surface of the tubular billet becomes twisted, leading to the phenomenon of steel heaping [12,13].…”

Section: Introductionmentioning

confidence: 99%

Technology Optimization Analysis of Three-Roll Rotary Piercing Process for Seamless Steel Pipe

Liu,

Li,

Gui

et al. 2024

JOM

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A three-roll rotary piercing process (TRPP) with severe plastic deformation was conducted to fabricate stainless steel seamless tubes with high mechanical properties. To address production issues such as Front stuck (FS) -where the front end of the tube blank cannot be accessed, Back stuck (BS) -where the back end of the tube blank cannot be penetrated, and steelheaping, the process parameters were optimized through simulation and testing in this study. Additionally, a new structure for the three-roll piercing machine was designed and developed. The changes in roll feed angle and plug advance were systematically analyzed for defects in the tubular billet. Numerical simulations of the TRPP were performed using commercially available FEM software (Simufact Forming) to analyze the stress, strain, and temperature distributions in the pierced tubes. Experimental analysis was conducted on seamless tubes with different diameter defects, leading to the discovery of optimal rules. Based on the experimental and numerical investigations, it was found that optimizing plug advance and roll feed angle can enhance the forming quality of the tubes.

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“…On the other hand, in some of them, it is only specified if a rigid-plastic, rigid-viscoplastic, elasto-plastic or elasto-viscoplastic approach is considered [ 3 , 4 , 5 , 6 , 7 , 8 , 9 ]. In addition, other authors claim that they have used the material constitutive model from the FE software database without giving details about the specific formulation used, or only state that the flow stress was dependent on the temperature and the strain rate [ 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 ]. In those studies in which information about the constitutive material formulation is provided, the constitutive formulations are commonly dependent on the strain, strain rate and temperature of the material through the use of both power and exponential based mathematical expressions.…”

Section: Introductionmentioning

confidence: 99%

Application of an Incremental Constitutive Model for the FE Analysis of Material Dynamic Restoration in the Rotary Tube Piercing Process

Murillo-Marrodán

García

Barco³

et al. 2020

Materials

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In the numerical simulation of hot forming processes, the correct description of material flow stress is very important for the accuracy of the results. For complex manufacturing processes, such as the rotary tube piercing (RTP), constitutive laws based on both power and exponential mathematical expressions are commonly used due to its inherent simplicity, despite the limitations that this approach involves, namely, the use of accumulated strain as a state parameter. In this paper, a constitutive model of the P91 steel derived from the evolution of dislocation density with strain, which takes into account the mechanisms of dynamic recovery (DRV) and dynamic recrystallization (DRX), is proposed for the finite element (FE) analysis of the RTP process. The material model is developed in an incremental manner to allow its implementation in the FE code FORGE®. The success of this implementation is confirmed by the good correlation between results of the simulation and experimental measurements of the manufactured tube (elongation, twist angle, mean wall thickness and eccentricity). In addition, this incremental model allows addressing how the restoring mechanisms of DRV and DRV occur during the RTP process. The analysis puts into evidence that DRV and DRX prevail over each other cyclically, following an alternating sequence during the material processing, due mainly to the effect of the strain rate on the material.

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Simulation of Rotary Piercing Process

Cited by 11 publications

References 1 publication

Computer-Simulation of the Billet Shape Change during Helical Piercing

Computer-Simulation of the Billet Shape Change during Helical Piercing

Technology Optimization Analysis of Three-Roll Rotary Piercing Process for Seamless Steel Pipe

Application of an Incremental Constitutive Model for the FE Analysis of Material Dynamic Restoration in the Rotary Tube Piercing Process

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