The Forging Penetration Efficiency of C45 Steel Stepped Shaft Radial Forging with GFM Forging Machine

2010 ◽  
Vol 154-155 ◽  
pp. 593-596 ◽  
Author(s):  
Xiang Ru Liu ◽  
Xu Dong Zhou
Keyword(s):  
Plastic Strain ◽  
Compressive Strain ◽  
Three Dimensional ◽  
Mean Stress ◽  
Radial Forging ◽  
Effective Plastic Strain ◽  
Forging Process ◽  
Stepped Shaft ◽  
Radial Forging Process ◽  
Strain Layer

The numerical thermal mechanical simulation of radial forging process of C45 steel stepped shaft with GFM forging machine was carried out by three dimensional finite element method DEFORM 3D. According to effective plastic strain, mean stress and mean plastic strain distribution of the radial forging process, the forging penetration efficiency (FPE) was studied throughout. The results show that: effective plastic strain in the center of the forging is never be zero; The mean stress in the center of the workpiece is proposed to describe hydrostatic pressure in this paper. There is compressive strain layer beneath the surface of the workpiece, while there is tensile strain layer in the center of the forging. These studied results could be a valuable reference for designing the similar forging operations.

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

2022 ◽  
Author(s):  
Saeed Darki ◽  
Evgeniy Yurevich Raskatov
Keyword(s):  
Effective Strain ◽  
Three Dimensional ◽  
Hardness Test ◽  
Radial Forging ◽  
Operational Parameters ◽  
Three Dimensional Model ◽  
Temperature Changes ◽  
Forging Process ◽  
Specimen Tube ◽  
Radial Forging Process

Abstract 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.

Numerical Study of the Workpiece Rotation Effect on the Strain and Residual Stress Distribution in the Cold Radial Forging Process

2010 ◽  
Author(s):  
H. Afrasiab ◽  
M. R. Movahhedy
Keyword(s):  
Residual Stress ◽  
Stress Distribution ◽  
Rotation Angle ◽  
Numerical Study ◽  
Three Dimensional ◽  
Residual Stress Distribution ◽  
Radial Forging ◽  
Forging Process ◽  
Inner Surface ◽  
Radial Forging Process

Radial forging is an open die forging process used for reducing the diameters of shafts, tubes, stepped shafts and axels, and for creating internal profiles in tubes. In this study, the effect of the workpiece rotation (the circumferential feed) on the strain and residual stress distribution in the inner surface of the tube in the cold radial forging process is investigated using nonlinear three dimensional finite element modeling. To verify the model, the predicted radial forging load is compared with the published experimental data which shows a good agreement. It is shown that for achieving a more favorable residual stress distribution in the workpiece inner surface, the rotation angle associated with each stroke should be reduced. Furthermore, a total rotation angle of 90° seems to be sufficient for finalizing the strain and residual stress distribution in the workpiece inner surface and using additional rotation is just a waste of time and energy in this respect.

scholarly journals Elasto-plastic analysis of the contact region between a rigid ellipsoid and a semi-flat surface

2018 ◽  
Vol 10 (9) ◽  
pp. 168781401879739 ◽  
Author(s):  
Pengyang Li ◽  
Lingxia Zhou ◽  
Fangyuan Cui ◽  
Quandai Wang ◽  
Meiling Guo ◽  
...  
Keyword(s):  
Residual Stress ◽  
Plastic Deformation ◽  
Plastic Strain ◽  
Contact Pressure ◽  
Contact Region ◽  
Three Dimensional ◽  
Von Mises Stress ◽  
Effective Plastic Strain ◽  
Normal Forces ◽  
Von Mises

When the load acting on a mechanical structure is greater than the yield strength of the material, the contact surface will undergo plastic deformation. Cumulative plastic deformation has an important influence on the lifespan of mechanical parts. This article presents a three-dimensional semi-analytical model based on the conjugate gradient method and fast Fourier transform algorithm, with the aim of studying the characteristic parameters of the contact region between a rigid ellipsoid and elasto-plastic half-space. Moreover, normal forces and tangential traction were considered, as well as the contact pressure resulting from various sliding speeds and friction coefficients. The contact pressure, effective plastic strain, von Mises stress, and residual stress were measured and shown to increase with increasing sliding velocity. Finally, when the friction coefficient, contact pressure, and effective plastic strain are increased, the von Mises stress is also shown to increase, whereas the residual stress decreases.

Numerical Simulation and Parameter Study of Radial Forging of Conical Tube

2020 ◽  
Vol 861 ◽  
pp. 514-518
Author(s):  
Xin Hai Zhao ◽  
Xin Bo Ren ◽  
Xing Chen Sun ◽  
Chao Zheng ◽  
Li Bin Song ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Reference Value ◽  
Element Model ◽  
Parameter Study ◽  
Radial Forging ◽  
Influence Of Process Parameters ◽  
Forming Quality ◽  
Forging Process ◽  
Radial Forging Process ◽  
The Finite Element Model

The cone tube is an important part of the circuit connector, which has high requirements for its forming quality. In this paper, the cone tube is taken as the object, the finite element model is established, the radial forging process of the cone tube is simulated, the influence of process parameters such as axial feed and friction on the thickness of the cone tube is studied, and the influence law is analyzed, which has certain reference value for the analysis of the forming law of the radial forging.

scholarly journals A Dynamic Model for Simulation of Hot Radial Forging Process

2017 ◽  
Vol 207 ◽  
pp. 478-483 ◽  
Author(s):  
Jianglin Huang ◽  
Carl D. Slater ◽  
Anup Mandral ◽  
Paul Blackwell
Keyword(s):  
Dynamic Model ◽  
Radial Forging ◽  
Forging Process ◽  
Radial Forging Process
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