Analysis of the hot radial forging process according to the finite element method

Darki, Saeed; Raskatov, Evgeniy Yurevich

doi:10.1007/s00170-020-05852-3

Cited by 11 publications

(11 citation statements)

References 22 publications

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“…In regard to the comparison between the error percentage of the simulation and experimental results; the current simulation procedure can be used for developing and expanding the investigation of parameters such as coefficient friction and die geometry. This simulation has been verified by comparing it with experimental results for cold RFP, which is presented in Table 3 [1].…”

Section: Resultsmentioning

confidence: 72%

“…Specimen geometry and contact force via the experimental and simulation results of process. [1] Since the contact force is one of the principal criteria of RFP in order to analyse of process, the examination of contact force vs radius reduction leads to an estimate of the quality of forged tube and dimensions of the radial machine. Therefore, Fig 6 displayed the contact force of experimental results [10] and FEM results vs reduction outer radius of tube and on the other hand, the function of this issue has been obtained to estimate applied force vs reduction radius for the used material.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, the Von Mises yield criterion has been implemented in order to flow rules. The relation between the essential matrices of FEM has been presented by Darki et al [1].…”

Section: Numerical Analysis and Experimental Methodsmentioning

confidence: 99%

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Investigations of The Hybrid Effects of The Operational Parameters In The Radial Forging Process Based On The Validation of The Hardness Test

Darki

Raskatov

2022

Preprint

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In this study, considering all the parameters in radial forging and a three-dimensional model has been simulated using the finite element method. By implementing an elastoplastic state for the specimen tube, parameters such as friction type, residual stress distribution, effective strain distribution, material flow velocity and its effect on the neutral plate and the distribution of force in the die have been studied and analyzed. The effects of angle on the quality and characteristics of the specimen and the longevity of the die have also been obtained. Experimental results have been used to confirm the accuracy of the simulation. The results of the hardness test after forging were compared with the simulation results. Good agreement between the results indicates the accuracy of the simulation in terms of hardness. Therefore, this validation allows confirming the other obtained results for the analysis and prediction of various components in the forging process. After the validation and confirmation of the results through the hardness test, the hardness distribution was obtained by considering temperature changes and the effective strain on the specimen.

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Section: Resultsmentioning

confidence: 72%

Section: Resultsmentioning

confidence: 99%

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Investigations of The Hybrid Effects of The Operational Parameters In The Radial Forging Process Based On The Validation of The Hardness Test

Darki

Raskatov

2022

Preprint

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“…This is designed to create round products such as tubes, shafts, stepped shafts, axes, gun bars, and rifle barrels. Reducing the diameter of specimens is the main purpose of radial forging [1]. Accordingly, four dies with special feed rates and rotational angles surround the specimen.…”

Section: Introductionmentioning

confidence: 99%

Development of an Analysis Method for Radial Forging Parameters Based on Hardness Criterion

Darki¹,

Raskatov²

2023

JMechE

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Considering the complexity of the radial forging process, the study of dynamic and thermodynamic parameters is of great importance. With the severe deformation of a workpiece in a plastic state, the effects of all parameters affecting the final geometry of the forging pipe need to be optimized. Thus, the mathematical model of the process is based on visco-plastic material, taking into account thermomechanical coupling and the surface properties during forging, including the hardness of the workpiece and friction. The results present the effects of a die angle on residual stress, total wear, and contact force, leading to ideal operating conditions and the ideal design of machine parts. In order to ensure the accuracy of the calculations and predictions made through software, a hardness test was performed experimentally, which showed the hardness curve of the microstructure and the strain of the workpiece. This indicates the consistency and accuracy of the results obtained from both methods. In order to improve the process and the tube employed, using an optimized die is recommended.

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“…Moreover, the most active regions of strain are located on the inner and outer surface of the tube during the process [9]. Also Darki investigated rotary swaging by numerical methods and performed a radial forging with two stages [10] and determined that in addition to the uniform distribution of the residual stresses at the outer and inner surface, the maximum residual stresses were generated in the first process stage. Experimental investigation by neutron diffraction analyses of cold rotary swaged tungsten heavy alloy WNiCo showed, that the residual stresses and their distribution within the semi-finished product were not homogeneous.…”

Section: Introductionmentioning

confidence: 99%

Mechanische Eigenschaften rundgekneteter Stahlkomponenten

Charni

Ortmann-Ishkina

Herrmann

et al. 2021

Forsch Ingenieurwes

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The radial infeed rotary swaging is widely used as a diameter reduction forming process of axisymmetric workpieces, improving the mechanical properties with excellent near net shape forming. In the present study, rotary swaging experiments with different parameter setups were performed on steel tubes and bars under different material states and several resulting property modifications were investigated such as stress-strain curve, hardness, fatigue strength and surface residual stresses. The results show a significant work hardening induced by the rotary swaging process and an improvement in the static and dynamic mechanical properties was observed. Furthermore, the hardness distribution was homogenous in the cross section of the rotary swaged workpieces. Moreover, depending on the process conditions, different residual stresses distribution were generated along the surface.

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Analysis of the hot radial forging process according to the finite element method

Cited by 11 publications

References 22 publications

Investigations of The Hybrid Effects of The Operational Parameters In The Radial Forging Process Based On The Validation of The Hardness Test

Investigations of The Hybrid Effects of The Operational Parameters In The Radial Forging Process Based On The Validation of The Hardness Test

Development of an Analysis Method for Radial Forging Parameters Based on Hardness Criterion

Mechanische Eigenschaften rundgekneteter Stahlkomponenten

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