Analysis of the Radial Forging Process for Manufacturing Rods and Tubes

1976 ◽  
Vol 98 (1) ◽  
pp. 265-271 ◽  
Author(s):  
G. D. Lahoti ◽  
T. Altan
Keyword(s):  
Experimental Data ◽  
Flow Stress ◽  
Strain Rate ◽  
Parametric Study ◽  
Room Temperature ◽  
Radial Forging ◽  
Process Variables ◽  
Slab Method ◽  
Forging Process ◽  
Radial Forging Process

The slab method of analysis was applied to study the mechanics of radial forging of rods and tubes. The analysis has been computerized by taking into account the effects of strain, strain rate, and temperature upon the flow stress of the material being forged. Forging loads were predicted for selected conditions in radial forging of rods at room temperature. The predictions were compared with experimental data, published by another investigator. The results indicate that the analysis developed in the present study is sufficiently accurate for practical purposes. A parametric study was conducted to determine the relations between various process variables in hot radial forging of tubes.

Generalized Slab Method Analysis of Radial Forging With a General Curved Shape Die

2006 ◽  
Author(s):  
Hamed Afrasiab ◽  
M. R. Movahhedy
Keyword(s):  
Metal Flow ◽  
Radial Forging ◽  
Process Variables ◽  
Slab Method ◽  
Die Geometry ◽  
Forging Process ◽  
Radial Forging Process ◽  
Open Die Forging ◽  
Method Analysis ◽  
Forging Load

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. Among parameters affecting process variables, the die geometry is of fundamental importance and greatly influences variables such as forging load, stress distribution on the dies, metal flow during deformation, and surface finish of the forged product. In this paper a generalized slab method analysis of radial forging process is presented which can handle this process with curved shape dies. Results for dies with various curves are presented and it is shown that the analysis reduces to that of Lahoti and Altan [2] when the die has a linear profile.

Finite Element Analysis Using Dynamic Material Model to Design Process Variables of Radial Forging

2013 ◽  
Vol 535-536 ◽  
pp. 284-287 ◽  
Author(s):  
Jeongsuk Lim ◽  
Young Seon Lee ◽  
Young Hoon Moon
Keyword(s):  
Grain Size ◽  
Finite Element ◽  
Strain Rate ◽  
Feed Rate ◽  
Rotation Angle ◽  
Material Model ◽  
Radial Forging ◽  
Forging Process ◽  
Dynamic Material Model ◽  
Radial Forging Process

In order to obtain a refined and uniform microstructure in the final billet, the radial forging process needs to be optimized and controlled with various process parameters such as temperature of ingot and die, die size, ram speed, upset ratio, etc. Grain size control is one of the most effective ways for the control of mechanical properties. The change in grain size is significantly related with strain, strain rate and temperature of forged part. To understand material properties and to analyze stability and instability area of forged workpiece, hot compression test of Ti-6Al-4V was carried out within the strain-rate range 10-2 to 10 s-1, and the temperature range 800 to 1100oC. And dynamic material map of Ti-6Al-4V was tabulated. In this study, a three-dimensional rigid-plastic finite element method(FEM) was used to analyze the radial forging process, focusing on the effects of feed rate and rotation angle for appropriate forging pass schedule. And the simulation result was confirmed with dynamic material model of Ti-6Al-4V. The optimal combination of feed rate and rotation angle has been determined by quantifying the radius profile in the longitudinal direction, roundness of the product and uniform strain distribution.

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.

Research into the Flow Stress of Al-Mg-Si Alloy (AD-35) during the Abrupt Change of the Strain Rate at Elevated Temperatures

2013 ◽  
Vol 554-557 ◽  
pp. 1099-1104 ◽  
Author(s):  
Pavel A. Petrov ◽  
Viktor Voronkov ◽  
Konstantin Potapenko ◽  
Mikhail Petrov ◽  
Olga Gamzina
Keyword(s):  
Flow Stress ◽  
Strain Rate ◽  
Elevated Temperatures ◽  
Abrupt Change ◽  
Hot Forging ◽  
Experimental Investigations ◽  
Engineering Strain ◽  
Industrial Practice ◽  
Transient Change ◽  
Forging Process

In industrial practice of rolling and hot forging, i.e. extrusion-type forging, abruptchanges in strain rate during the deformation of the material occur. For accurate numericalsimulation of a forging process, the experimental investigation of the effect of the transient changein strain rate on plastic flow behaviour is necessary. The present paper deals with the investigationof this effect on the flow stress of an AD-35 aluminium alloy during its deformation within thetemperature range of 350-450 °C. During continuous uniaxial compression loading of a cylindricalspecimen, the strain rate was either constant or abruptly increased or decreased from its initial valueat engineering strain of app. 26 %. The following strain-rate histories were applied: 1) constantstrain rate of 0.1, 1.0 and 10 s-1; 2) abrupt strain-rate increasing from 1.0 to 10.0 s-1; 3) abrupt strainratedecreasing from 10.0 to 1.0 s-1. The results of the experimental investigations corresponded tothe transient change in strain rate histories were used to verify the model of softening as well as themodel of hardening of the AD-35 alloy during the abrupt change of the strain rate. It allows todefine these models explicitly.

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.

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.

Sign in / Sign up

Export Citation Format

Share Document