Improving the Design of a Ø120-mm Mandrel for Piercing Semifinished Products in a Two-High Rotary Rolling Mill

Gerasimov, Yu. L.; Avdeev, S.; Bobarikin, Yu. L.

doi:10.1007/s11015-016-0176-z

Cited by 3 publications

(3 citation statements)

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“…In most studies of manufacturing the tube, the scientists have concentrated on experimental results of tools wear while the feasibility of the tool's approximate lifespan is possible to predict based on a mathematical model of wear phenomenon. Gerasimov et al [4] presented the new design of mandrel in the rotary piercing process based on tool wear of tools. Studies have illustrated through the improvement of the geometry of tools that the principal parameters of the process like total force can be improved while the longevity of the tool has been increased with the purpose of decreasing the total wear.…”

Section: Introductionmentioning

confidence: 99%

Theoretical and Experimental Study on Wear Behavior in Order to the Improvement of Die Geometry in the Radial Forging Machine

Raskatov

Darki

Bulganina

2023

KEM

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Deformation of shafts and seamless tubes are carried out by a radial forging machine in order to achieve the required dimensions and improve the mechanical parameters of the material. Hence, the study of improving the performance of the radial machine leads to an increase in the quality of the forged tube, while the machine equipment in the process of radial forging will have the least erosion. In this process, the workpiece is surrounded by four tools and during the repeated blows of the die, the desired dimensions of the workpiece are obtained. with regards to the contact surface of the die with the workpiece, the most common tool that faces the highest erosion is the die. Therefore, the improvement of die geometry in order to minimize wear has been investigated in this article. Also, the distribution of die temperature and analysis of die stress during the process has been implemented. Accordingly, three types of die geometries: Flat, Concave and Convex are considered to measure the depth of wear and determine the maximum erosion through 3D finite element simulation and experimental estimates. Therefore, according to the comparison between numerical and analytical results in the case of wear analysis with experimental results, the validation of simulation was confirmed.

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Section: Introductionmentioning

confidence: 99%

Theoretical and Experimental Study on Wear Behavior in Order to the Improvement of Die Geometry in the Radial Forging Machine

Raskatov

Darki

Bulganina

2023

KEM

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“…The obtained results suggest that the process via two rolls can create the high accuracy in terms of the surface roughness of the tube and the other hand this procedure includes the less weight of the equipment and with the manufacturing flexible. Gerasimov et al 3 developed the design of mandrel geometry in the piercing process. Accordingly, they examine the improved mandrel through the experimental and numerical models in terms of mandrel wear.…”

Section: Introductionmentioning

confidence: 99%

Study of the rollers geometry effects in rotary tube piercing and wear analyses of mandrel according to the finite element method

Darki

Raskatov

2021

Proceedings of the Institution of Mechanical Engineers, Part E:

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The rotary tube piercing (RTP) is the first process of making the seamless tube after producing the desired alloy ingot. There are several approaches to manufacture a seamless tube, but one of the most common types is RTP. This approach covers a wide range of processes that are categorized according to the number and shape of the rollers. On the other hand, each of these types has designed guides in the output and input of the piercing process. In this paper, a new design of the input guide for four types of rollers have been examined and simulated. Thus, four specimens including Diescher and Conical rollers were considered, with the different number of rollers. Results including torque, total force, mandrel wear, temperature distribution, and strain were extracted using FEM simulation. In order to the validation of simulation, the total force and oscillations of applied force within the process have been compared with the experimental results. The results obtained through this simulation, are more in line with the empirical results obtained from previous research. As well as, the FEM simulation confirmed the performance accuracy of the output and input guides of the RTP process. On the other hand, the results indicate that the three-roller Diescher type with 17° feed angle, has the most suitable arrangement for production of seamless tube.

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“…In many of the reviewed scientific contributions, the constitutive model is not described. 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 ].…”

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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Improving the Design of a Ø120-mm Mandrel for Piercing Semifinished Products in a Two-High Rotary Rolling Mill

Cited by 3 publications

References 0 publications

Theoretical and Experimental Study on Wear Behavior in Order to the Improvement of Die Geometry in the Radial Forging Machine

Theoretical and Experimental Study on Wear Behavior in Order to the Improvement of Die Geometry in the Radial Forging Machine

Study of the rollers geometry effects in rotary tube piercing and wear analyses of mandrel according to the finite element method

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

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