Optimal design to reduce the maximum load in ring rolling process

Kim, Naksoo; Kim, Honglae; Jin, Kai

doi:10.1007/s12541-012-0239-4

Cited by 25 publications

(16 citation statements)

References 18 publications

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“…As shown in Fig. 4b, referring to the inner and outer radius of the ring, the two angles related to the projection of 1 l and 2 l on the x-y plane, can be estimated as in (14).…”

Section:  Sinmentioning

confidence: 99%

“…In order to validate both the model for the prediction of the temperature and the reliability of the application of the previously mentioned Hill's solution to the RARR process, the case study presented in the work of Kim et al [14] was considered. The flow stress equation for the material used in [14], stainless steel alloy AISI-304, is given by (25) and the relevant model constants are listed in Table 1. The relevant data for the ring, the ring rolling mill, the process parameters and additional AISI-304 material properties are summarized in Table 2.…”

Section: Model Validationmentioning

confidence: 99%

“…The relevant data for the ring, the ring rolling mill, the process parameters and additional AISI-304 material properties are summarized in Table 2. In Table 2, the parameters which has a "*" before the description have been taken from the reference of [14], where the material model (25) was also derived from. Differently, the parameters with "**", have been set-up by authors based on the MATILDA® (Material Information Link and Database Service) archive for the AISI-304 steel.…”

Section: Model Validationmentioning

confidence: 99%

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Temperature estimation and slip-line force analytical models for the estimation of the radial forming force in the RARR process of flat rings

Quagliato

Berti

2017

International Journal of Mechanical Sciences

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In this study, a mathematical model for the prediction of the temperature evolution in the ring during the radial-axial ring rolling process is developed and used, together with the authors' previous results, to determine analytically the flow stress of the material during process. These results, combined with Hill's slip-line field solution adapted to the RARR process, allow a fast and reasonably precise calculation of the radial forming force, a key parameter at the preliminary stage of the process design. The approach is validated by applying the proposed model to a case available in the literature and comparing the analytical results with those of the laboratory experiment and FEM simulation. Following the successful comparison, the models were applied to a large variety of flat rings, comparing analytical predictions with the results of FEM simulations. The accuracy of the analytical calculation and the reliability of the proposed models, for different ring configuration and process parameters, are presented and discussed.

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“…As shown in Fig. 4b, referring to the inner and outer radius of the ring, the two angles related to the projection of 1 l and 2 l on the x-y plane, can be estimated as in (14).…”

Section:  Sinmentioning

confidence: 99%

Section: Model Validationmentioning

confidence: 99%

Section: Model Validationmentioning

confidence: 99%

See 1 more Smart Citation

Temperature estimation and slip-line force analytical models for the estimation of the radial forming force in the RARR process of flat rings

Quagliato

Berti

2017

International Journal of Mechanical Sciences

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“…Guo and Yang [9] proposed a feeding strategy that could make the ring's outer radius stably grow up in GH4169 steel radial-axial ring rolling process, determined the reasonable value ranges of the mandrel feed rate, and finally verified the correctness of the proposed feeding strategy by numerical simulation method. Kim et al [10] decreased the maximum load of the rolling mill by optimizing the motions of rolls in radial-axial ring rolling process. Xu et al [11] designed an effective feeding strategy to improve the mechanical properties of rolled rectangular rings based on 42CrMo processing diagram.…”

Section: Introductionmentioning

confidence: 99%

A Feeding Strategy in Inner L‐Shape Ring Hot Rolling Process

Wang¹,

Guan²

2017

Mathematical Problems in Engineering

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In order to make the inner L-shape ring polling process with a closed die structure (ILRRCDS) on the top and bottom of the driven roll stable, at first, this paper established the mathematical model for ILRRCDS. Then, the plastic penetration and biting-in conditions for ILRRCDS were deduced based on plain ring rolling theory. Moreover, a feeding strategy that can realize a constant growth of the ring's outer radius was proposed and the reasonable value ranges of the feed rate of the mandrel were determined. The numerical simulation model for ILRRCDS is established based on ABAQUS software. Finally, the equivalent plastic strain (PEEQ) and temperature distributions of rolled ring were obtained. The results indicated that the proposed feeding strategy can realize a stable ILRRCDS. At the end of ILRRCDS, the PEEQ at the inner radius surface of the ring is maximum, the PEEQ at the outer radius surface of the ring takes the second place, and the PEEQ at the middle part of ring is minimum. With the increase of rolling time, the higher temperature zone of the rolled ring gradually moves from the center part of the ring to the "inner corner zone" of the ring.

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“…Zhou et al [4] claimed that as the feed rates of the mandrel and axial rolls increase in radial-axial rectangular ring rolling process, the more uniform strain and temperature distributions of rolled ring can be obtained. In order to reduce the maximum rolling force in radial-axial rectangular ring rolling process, Kim et al [5] optimally designed the feed rates of the mandrel and axial rolls by using Taguchi method and conjugate gradient method. Wang et al [6] pointed out that the mandrel feed rate had prominent effects on rolling force and spread distribution in hot ring rolling process.…”

Section: Introductionmentioning

confidence: 99%

A Mandrel Feeding Strategy in Conical Ring Rolling Process

Zhao

Guan

2014

Mathematical Problems in Engineering

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A mathematical model for radial conical ring rolling with a closed die structure on the top and bottom of driven roll, simplified as RCRRCDS, was established. The plastic penetration and biting-in conditions in RCRRCDS process were determined. A mandrel feeding strategy for RCRRCDS process was proposed. The mandrel feed rate and its reasonable value range were deduced. The coupled thermal-mechanical FE model of RCRRCDS process was established. The reasonable value range of the mandrel feed rate was verified by using numerical simulation method. The results indicate that the reasonable value range of the mandrel feed rate is feasible, the proposed mandrel feeding strategy can realize a steady RCRRCDS process, and the forming quality of conical ring rolled by using the proposed feeding strategy is better than that of conical ring rolled by using a constant mandrel feed rate.

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Optimal design to reduce the maximum load in ring rolling process

Cited by 25 publications

References 18 publications

Temperature estimation and slip-line force analytical models for the estimation of the radial forming force in the RARR process of flat rings

Temperature estimation and slip-line force analytical models for the estimation of the radial forming force in the RARR process of flat rings

A Feeding Strategy in Inner L‐Shape Ring Hot Rolling Process

A Mandrel Feeding Strategy in Conical Ring Rolling Process

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