Forging Process Design of Al Rotating Arm Holder by FE Analysis

2007 ◽  
Vol 26-28 ◽  
pp. 99-102
Author(s):  
Kwan Do Hur ◽  
Hyo Young Lee ◽  
Hong Tae Yeo
Keyword(s):  
Structural Analysis ◽  
Safety Factor ◽  
Effective Stress ◽  
Process Design ◽  
Aluminium Alloys ◽  
Fuel Efficiency ◽  
Effective Strain ◽  
Fe Analysis ◽  
Passenger Car ◽  
Forging Process

Aluminium alloys have been widely used in the structure of aircraft and passenger car because of its lightweight. It is also interested in the lightweight products to improve the fuel efficiency. In this research, forging design of Al rotating arm holder has been studied by FE analysis. Structural analysis of the model was performed at first. From the results of the analysis, effective stress, effective strain and safety factor acting on the component were obtained.

scholarly journals VOID EVOLUTION BEHAVIOR AND CLOSURE CRITERION INSIDE LARGE SHAFT FORGINGS DURING A FORGING PROCESS

2021 ◽  
Vol 55 (3) ◽  
Author(s):  
Yongxing Jiao ◽  
Cunlong Zhou ◽  
Jiansheng Liu ◽  
Xuezhong Zhang ◽  
Wenwu He
Keyword(s):  
Effective Stress ◽  
Shape Change ◽  
Effective Strain ◽  
Great Influence ◽  
Hydraulic Press ◽  
Stress Deviator ◽  
Void Closure ◽  
Forging Process ◽  
Void Shape ◽  
Simulation Results

In this study, the effects of different void positions, void shapes and sizes on the evolution of voids were discussed in detail using experiments and simulations. The results show that the influence of the void size on the void closure can be ignored, while the void position and void shape have a great influence on the closure of a void. Considering the complexity of the void-shape change in a forging process, we proposed a quantitative expression of the void-shape coefficient, which is affected by the effective stress and effective strain. Meanwhile, the void-shape evaluation parameter, defined as a function of the stress deviator, effective strain and effective stress, was proposed to describe the changes in the void aspect ratio. Finally, WHF (wide die heavy blow) forging experiments were conducted using a 5MN hydraulic press to verify the numerical-simulation results. Based on the experimental and simulation results, a new mathematical model for void-closure determination was established during a forging process of large shaft forgings. The experimental results were consistent with the simulation results, showing that the void-closure model can accurately determine whether a void is closed or not.

Optimization of the Hot Forming Processes for the Connecting Rod

2012 ◽  
Vol 461 ◽  
pp. 721-724
Author(s):  
Xia Chen ◽  
Yang Yi ◽  
Qing Ming Chang ◽  
Yun Xiang Zhang ◽  
Sheng Liu
Keyword(s):  
Stress Field ◽  
Effective Stress ◽  
Strain Field ◽  
Effective Strain ◽  
Three Dimensional ◽  
Fem Simulation ◽  
Connecting Rod ◽  
3D Fem ◽  
Forging Process ◽  
Deform 3D

A three-dimensional thermo-mechanically coupled FEM-simulation of the production of a connecting rod has been performed between dies (pre- and final-forging). According to the part’s characters and its dimensions, a hammer die forging process was determined. According to the hammer die process, three-dimensional connecting nod model was built in UG software and two different cases for pre-forging was designed. Different forming case was simulated by Deform-3D FEM program, the effective stress field and effective strain field were analyzed by comparison; it proved that optimized performing process was reasonable and can be used as reference in production.

Limit State Philosophy in Pipeline Design

1987 ◽  
Vol 109 (1) ◽  
pp. 9-22 ◽  
Author(s):  
C. P. Ellinas ◽  
P. W. J. Raven ◽  
A. C. Walker ◽  
P. Davies
Keyword(s):  
Structural Analysis ◽  
Safety Factor ◽  
Current Knowledge ◽  
Limit State ◽  
Structural Behavior ◽  
Major Conclusion ◽  
Safety Factors ◽  
Suitable Framework ◽  
General Aspects ◽  
Pipeline Design

This paper considers the application of the limit state philosophy of structural analysis to pipeline design. General aspects of the philosophy are discussed and the approach to the evaluation of safety factors is reviewed. The paper further considers the various limit and serviceability states which would be relevant to a pipeline and reviews the various factors which may require consideration, before a code embodying the limit state philosophy could be formulated. A review of the state of current knowledge on various aspects of geometry and material characteristics, loading and structural behavior is presented. It is intended that such a review can be used as the basis for a larger study to provide guidance and data for the evaluation of rational levels of safety factor. The major conclusion reached by the authors is that a limit state philosophy would be valuable in providing a suitable framework, which may highlight the significant aspects of pipeline design and which can most easily accommodate new requirements and results obtained from research.

Modeling and Numerical Simulation Research on Hollow Steel Ingot Forging Process of Heavy Cylinder Forging

2013 ◽  
Vol 712-715 ◽  
pp. 627-632
Author(s):  
Min Liu ◽  
Qing Xian Ma
Keyword(s):  
Numerical Simulation ◽  
Grain Size ◽  
Shear Zone ◽  
Grain Refinement ◽  
Steel Ingot ◽  
Effective Strain ◽  
Meridian Plane ◽  
Forging Process ◽  
Forming Load ◽  
Average Grain Size

Aiming at the disadvantages of low utilization ratio of steel ingot, uneven microstructure properties and long production period in the solid steel ingot forging process of heavy cylinder forgings such as reactor pressure vessel, a new shortened process using hollow steel ingot was proposed. By means of modeling of lead sample and DEFORM-3D numerical simulation, the deformation law and grain refinement behavior for 162 ton hollow steel ingot upsetting at different reduction ratios, pressing speeds and friction factors were investigated, and the formation rule of inner-wall defects in upsetting of hollow steel ingots with different shape factors was further analyzed. Simulation results show that the severest deformation occurs in the shear zone of meridian plane in the upsetting process of hollow steel ingot, and the average grain size in the shear zone is the smallest. As pressing speed increases, the forming load gradually increases and the deformation uniformity gets worse, while the average grain size decreases. An increase in friction factor can increase the peak value of effective strain, but it significantly reduces the deformation uniformity, increases the forming load and goes against grain refinement. Moreover, the four kinds of defects on the inner wall of steel ingot can be eliminated effectively by referring to the plotted defect control curve for hollow steel ingot during high temperature upsetting.

Computer Aided Cold Forging Process Design: Determination of Machine Setting Conditions

CIRP Annals ◽  
1985 ◽  
Vol 34 (1) ◽  
pp. 245-248 ◽  
Author(s):  
P. Bariani ◽  
W.A. Knight ◽  
F. Jovane
Keyword(s):  
Process Design ◽  
Cold Forging ◽  
Forging Process ◽  
Computer Aided ◽  
Machine Setting

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.

scholarly journals Process Design of Extend Forging Process by Numerical Simulation

2009 ◽  
Vol 50 (579) ◽  
pp. 343-348 ◽  
Author(s):  
Hideki KAKIMOTO ◽  
Takefumi ARIKAWA ◽  
Yoichi TAKAHASHI ◽  
Tatsuya TANAKA ◽  
Yutaka IMAIDA
Keyword(s):  
Numerical Simulation ◽  
Process Design ◽  
Forging Process
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